AGREEMENT AND PLAN OF MERGER

                                  By and Among

                           PATTERSON-UTI ENERGY, INC.,

                         PATTERSON-UTI ACQUISITION, LLC

                                       and

                            TMBR/SHARP DRILLING, INC.














                                  MAY 26, 2003






                                TABLE OF CONTENTS



                                                                                                            Page
                                                                                                            ----
                                                                                                      
ARTICLE 1             THE MERGER...............................................................................1

         1.1      The Merger...................................................................................1

         1.2      Effective Time...............................................................................1

         1.3      Effects of the Merger........................................................................2

         1.4      Articles of Organization and Regulations.....................................................2

         1.5      Officers.....................................................................................2

         1.6      Further Assurances...........................................................................2

         1.7      Closing......................................................................................2

ARTICLE 2             EFFECT OF THE MERGER ON THE CAPITAL STOCK AND MEMBERSHIP INTERESTS OF THE
                      CONSTITUENT COMPANIES; EXCHANGE OF CERTIFICATES..........................................3

         2.1      Effect on Capital Stock and Membership Interests.............................................3

         2.2      Surviving Company to Make Certificates Available.............................................4

         2.3      Dividends; Transfer Taxes....................................................................5

         2.4      No Fractional Shares.........................................................................5

         2.5      Return of Exchange Fund......................................................................6

         2.6      Further Ownership Rights in Company Common Stock.............................................6

         2.7      Closing of the Company Transfer Books........................................................6

ARTICLE 3             REPRESENTATIONS AND WARRANTIES...........................................................6

         3.1      Representations and Warranties of the Company................................................6

         3.2      Representations and Warranties of Parent and Sub............................................21

ARTICLE 4             COVENANTS RELATING TO CONDUCT OF BUSINESS...............................................25

         4.1      Conduct of Business of the Company..........................................................25

ARTICLE 5             ADDITIONAL AGREEMENTS...................................................................28

         5.1      Shareholder Approval; Preparation and Filing of the S-4 and Proxy Statement/Prospectus......28

         5.2      Access to Information.......................................................................29

         5.3      Reasonable Efforts; Notification............................................................31

         5.4      Indemnification.............................................................................33

         5.5      Letter of the Company's Accountants.........................................................34

         5.6      Report of Independent Petroleum Engineers...................................................34

         5.7      Letter of Parent's Accountants..............................................................35





                                                                                                       
         5.8      Fees and Expenses...........................................................................35

         5.9      Company Stock Options.......................................................................35

         5.10     Public Announcements........................................................................35

         5.11     Agreement to Defend.........................................................................35

         5.12     Nasdaq National Market......................................................................35

         5.13     Employee Benefit Plans......................................................................36

         5.14     Agreements of Others........................................................................36

ARTICLE 6             CONDITIONS PRECEDENT....................................................................36

         6.1      Conditions to Each Party's Obligation to Effect the Merger..................................36

         6.2      Conditions to Obligations of Parent and Sub.................................................37

         6.3      Condition to Obligations of the Company.....................................................38

ARTICLE 7             TERMINATION, AMENDMENT AND WAIVER.......................................................39

         7.1      Termination.................................................................................39

         7.2      Procedure for Termination, Amendment, Extension or Waiver...................................40

         7.3      Effect of Termination.......................................................................40

         7.4      Amendment...................................................................................40

         7.5      Extension; Waiver...........................................................................41

ARTICLE 8             SPECIAL PROVISIONS AS TO CERTAIN MATTERS................................................41

         8.1      Takeover Defenses of the Company............................................................41

         8.2      No Solicitation.............................................................................41

         8.3      Fee and Expense Reimbursements..............................................................43

ARTICLE 9             GENERAL PROVISIONS......................................................................43

         9.1      Nonsurvival of Representations and Warranties...............................................43

         9.2      Notices.....................................................................................43

         9.3      Definitions.................................................................................45

         9.4      Interpretation..............................................................................45

         9.5      Counterparts................................................................................45

         9.6      Entire Agreement; No Third-Party Beneficiaries..............................................45

         9.7      Governing Law...............................................................................46

         9.8      Assignment..................................................................................46

         9.9      Enforcement of the Agreement................................................................46

         9.10     Performance by Sub..........................................................................46

         9.11     Severability................................................................................46






                                                                                                         
Exhibit A         --       Form of opinion of counsel to the Company............................................A-1
Exhibit B         --       Form of opinion of counsel to Parent and Sub.........................................B-1
Exhibit C         --       Form of Affiliate Agreement..........................................................C-1
Schedule I        --       Company Disclosure Schedule........................................................S-I-1
Schedule II       --       Certain Officers of the Company...................................................S-II-1
Schedule III      --       Certain Officers of Parent.......................................................S-III-1









                             INDEX OF DEFINED TERMS



                                                                           Section
                                                                           -------
                                                                   
affiliate.....................................................              9.3(a)
Agreement.....................................................            Preamble
Applicable Period.............................................              8.2(a)
Acquisition Proposal..........................................              8.2(a)
Articles of Merger............................................                 1.2
Cash Consideration............................................              2.1(c)
Certificates..................................................              2.2(a)
Closing.......................................................                 1.8
Closing Price.................................................                 2.4
Code..........................................................            Preamble
Company.......................................................        Introduction
Company Balance Sheet.........................................              3.1(e)
Company Balance Sheet Date....................................              3.1(e)
Company Benefit Plan..........................................              3.1(l)
Company Charter Documents.....................................              3.1(d)
Company Disclosure Schedule...................................                 3.1
Company Financial Advisor.....................................              3.1(u)
Company Permits...............................................              3.1(p)
Company Regulatory Documents..................................              5.3(c)
Company Representatives.......................................                 8.2
Company SEC Documents.........................................              3.2(e)
Company Shareholder Approval..................................              3.1(j)
Company Share and Company Shares..............................            Preamble
Company Stock Option..........................................                 5.6
Company's Stock Plans.........................................              3.1(c)
Dissenting Shareholders.......................................            Preamble
Dissenting Shares.............................................              2.1(e)
Effective Time................................................                 1.2
Employer......................................................              3.1(l)
Environmental Claim...........................................              3.1(o)
Environmental Permits.........................................              3.1(o)
Environmental Laws............................................              3.1(o)
ERISA.........................................................              3.1(l)
Exchange Act..................................................              3.1(d)
Exchange Agent................................................              2.2(a)
Exchange Fund.................................................              2.2(a)
Exchange Ratio................................................              2.1(c)
Fairness Opinion..............................................              3.1(u)
Governmental Entity...........................................              3.1(d)
Hazardous Materials...........................................              3.1(o)
hereof, herein and hereunder..................................                 9.4
HSR Act.......................................................              3.1(d)
include, includes or including................................                 9.4
Indemnified Parties...........................................              5.4(a)







                                                                           Section
                                                                           -------
                                                                   
IRS...........................................................              3.1(l)
knowledge.....................................................              9.3(b)
Liens.........................................................              3.1(d)
material adverse effect or material adverse change............              9.3(c)
Merger........................................................            Preamble
Merger Consideration..........................................              2.1(c)
Nasdaq National Market........................................                 2.4
Notice of Superior Proposal...................................              8.2(b)
Parent........................................................        Introduction
Parent Balance Sheet..........................................              3.2(d)
Parent Balance Sheet Date.....................................              3.2(d)
Parent Charter Documents......................................              3.1(c)
Parent Common Stock...........................................            Preamble
Parent Preferred Stock........................................              3.2(b)
Parent Regulatory Documents...................................              5.3(c)
Parent Rights Agreements......................................              2.1(c)
Parent SEC Documents..........................................              3.2(d)
person........................................................              9.3(d)
Proxy Statement/Prospectus....................................              3.1(d)
S-4...........................................................              3.2(f)
S-8 Registration Statement....................................                 5.6
Sarbanes-Oxley................................................              3.1(e)
SARs..........................................................              3.1(c)
SEC...........................................................              3.1(d)
Securities Act................................................              3.1(e)
Shareholder Meeting...........................................              3.1(f)
Sub...........................................................        Introduction
subsidiary....................................................              9.3(e)
superior proposal.............................................              8.2(c)
Surviving Company.............................................                 1.1
Tax or Taxes..................................................              3.1(m)
Tax Return....................................................              3.1(m)
TBCA..........................................................                 1.1
Trading Day...................................................                 2.4








                          AGREEMENT AND PLAN OF MERGER


         This Agreement and Plan of Merger is dated as of May 26, 2003, among
Patterson-UTI Energy, Inc., a Delaware corporation ("Parent"), Patterson-UTI
Acquisition, LLC, a Texas limited liability company ("Sub") and a wholly owned
subsidiary of Parent, and TMBR/Sharp Drilling, Inc., a Texas corporation (the
"Company").

         WHEREAS, the respective Boards of Directors of each of Parent and the
Company, and the sole member of Sub, have approved the acquisition of the
Company by Parent on the terms and subject to the conditions of this Agreement
and Plan of Merger (this "Agreement");

         WHEREAS, in order to effect such acquisition of the Company, the
respective Boards of Directors of each of Parent and the Company, and the sole
member of Sub, have approved the merger of the Company with and into Sub (the
"Merger"), upon the terms and subject to the conditions of this Agreement,
whereby each issued and outstanding share of common stock, $.10 par value per
share, of the Company (singularly, "Company Share", and plurally, "Company
Shares") not owned directly or indirectly by Parent or the Company, except
Company Shares held by persons who object to the Merger and comply with all of
the provisions of Texas law concerning the right of holders of Company Shares to
dissent from the Merger and require appraisal of their Company Shares
("Dissenting Shareholders") will be converted into the right to receive $9.09 in
cash and 0.312166 of a share of common stock, $0.01 par value per share, of
Parent (the "Parent Common Stock");

         WHEREAS, the parties intend that the Merger will qualify as a
reorganization described in Section 368(a) of the Internal Revenue Code of 1986,
as amended (the "Code"); and

         WHEREAS, Parent, Sub and the Company desire to make certain
representations, warranties and agreements in connection with the Merger and
also to prescribe various conditions to the Merger;

         NOW, THEREFORE, in consideration of the premises and the
representations, warranties and agreements herein contained, the parties agree
as follows:

                                   ARTICLE 1

                                   THE MERGER


     1.1  THE MERGER. Upon the terms and subject to the conditions hereof and in
accordance with the Texas Business Corporation Act (the "TBCA"), the Company
shall be merged with and into Sub at the Effective Time (as defined below).
Following the Merger, the separate corporate existence of the Company shall
cease and Sub shall continue as the Surviving Company (the "Surviving Company")
and shall succeed to and assume all the rights and obligations of the Company in
accordance with the TBCA.

     1.2  EFFECTIVE TIME. As soon as practicable following the satisfaction or
waiver of the conditions set forth in ARTICLE 6, the parties shall file articles
of merger or other appropriate


                                       1


documents with the Secretary of State of Texas (the "Articles of Merger")
executed in accordance with the relevant provisions of the TBCA. The Merger
shall become effective at such time as the Articles of Merger are duly filed
with the Secretary of State of Texas or at such other time as Parent, Sub and
the Company shall agree should be specified in the Articles of Merger (the time
the Merger becomes effective being the "Effective Time").

     1.3  EFFECTS OF THE MERGER. The Merger shall have the effects set forth in
Article 5.06 of the TBCA.

     1.4  ARTICLES OF ORGANIZATION AND REGULATIONS.

         (a)  The Articles of Organization of Sub, as in effect at the Effective
Time, shall be the Articles of Organization of the Surviving Company until
thereafter changed or amended as provided therein or by applicable law, provided
that such Articles of Organization shall be amended hereby as of the Effective
Time to change the name of the Surviving Company to TMBR/Sharp Drilling, LLC.

         (b)  The regulations of Sub as in effect at the Effective Time shall be
the regulations of the Surviving Company until thereafter changed or amended as
provided therein or by applicable law.

     1.5  OFFICERS. The officers of Sub at the Effective Time shall be the
officers of the Surviving Company and shall hold office until the earlier of
their resignation or removal or until their respective successors are duly
elected and qualified, as the case may be.

     1.6  FURTHER ASSURANCES. If at any time after the Effective Time, the
Surviving Company shall consider or be advised that any deeds, bills of sale,
assignments or assurances or any other acts or things are necessary, desirable
or proper (a) to vest, perfect or confirm, of record or otherwise, in the
Surviving Company, its right, title or interest in, to or under any of the
rights, privileges, powers, franchises, properties or assets of either of the
constituent corporations to the Merger or (b) otherwise to carry out the
purposes of this Agreement, the Surviving Company and its appropriate officers
and directors or their designees shall be authorized to execute and deliver, in
the name and on behalf of either of the constituent corporations to the Merger,
all such deeds, bills of sale, assignments and assurances and do, in the name
and on behalf of such constituent corporations, all such other acts and things
necessary, desirable or proper to vest, perfect or confirm its right, title or
interest in, to or under any of the rights, privileges, powers, franchises,
properties or assets of such constituent corporation and otherwise to carry out
the purposes of this Agreement.

     1.7  CLOSING. The closing of the transactions contemplated by this
Agreement (the "Closing") shall take place at the offices of Fulbright &
Jaworski L.L.P., 1301 McKinney Street, Suite 5100, Houston, Texas 77010, at
10:00 a.m., Houston time, on the second business day after the day on which the
last of the conditions set forth in ARTICLE 6 shall have been fulfilled or
waived or at such other time and place as Parent, Sub and the Company shall
agree.


                                       2


                                   ARTICLE 2

            EFFECT OF THE MERGER ON THE CAPITAL STOCK AND MEMBERSHIP
              INTERESTS OF THE CONSTITUENT COMPANIES; EXCHANGE OF
                                  CERTIFICATES


     2.1  EFFECT ON CAPITAL STOCK AND MEMBERSHIP INTERESTS. As of the Effective
Time, by virtue of the Merger and without any action on the part of the holders
of any of the Company Shares:

         (a)  Membership Interests of Sub. Each issued and outstanding
membership interest of Sub shall be converted into and become an equivalent
fully paid and nonassessable membership interest of the Surviving Company.

         (b)  Cancellation of Treasury Shares and Parent Owned Shares. All
Company Shares that are owned directly or indirectly by the Company as treasury
stock and any Company Shares owned by Parent, Sub or any other wholly owned
subsidiary of Parent shall be canceled, and no consideration shall be delivered
in exchange therefor.

         (c)  Conversion of Company Shares. Subject to the provisions of
Sections 2.1(e), 2.1(f) and 2.4, each Company Share issued and outstanding
immediately prior to the Effective Time (other than shares to be canceled in
accordance with Section 2.1(b)) shall be converted into $9.09 in cash (the "Cash
Consideration") and 0.312166 (the "Exchange Ratio") of a validly issued, fully
paid and nonassessable share of Parent Common Stock (collectively, the "Merger
Consideration"). Pursuant to the Rights Agreement between Parent and Continental
Stock Transfer & Trust Company, as Rights Agent, dated January 2, 1997, as
amended ("Parent Rights Agreement"), each share of Parent Common Stock shall be
accompanied by a right under the Parent Rights Agreement. All Company Shares,
when so converted, shall no longer be outstanding and shall automatically be
canceled and retired and each holder of a Certificate (as defined in Section
2.2(a)) representing any such shares shall cease to have any rights with respect
thereto, except the right to receive certain dividends and other distributions
as contemplated by Section 2.3, the Cash Consideration, shares of Parent Common
Stock and any cash, without interest, in lieu of fractional shares to be issued
or paid in consideration therefor upon the surrender of such Certificate in
accordance with Section 2.2.

         (d)  Treatment of Stock Options. Each outstanding Company Stock Option
(as defined in Section 5.9) shall be treated as provided in Section 5.9.

         (e)  Dissenting Shares. Notwithstanding anything in this Agreement to
the contrary, Company Shares that are outstanding immediately prior to the
Effective Time and that are held by Dissenting Shareholders who shall have
perfected dissenters' rights in accordance with Article 5.12 of the TBCA (the
"Dissenting Shares") shall not be converted into or represent the right to
receive the Merger Consideration (but instead shall be converted into the right
to receive payment from the Surviving Company with respect to such Dissenting
Shares in accordance with the TBCA), unless and until such Dissenting
Shareholder shall have failed to perfect or shall have effectively withdrawn or
lost such holder's rights to appraisal under the TBCA. If any such Dissenting
Shareholder shall have failed to perfect or shall have effectively


                                       3


withdrawn or lost such holder's rights to appraisal of such Company Shares under
the TBCA, such Dissenting Shareholder's Company Shares shall thereupon be deemed
to have been converted into and to have become exchangeable for, at the
Effective Time, the right to receive, upon surrender as provided above, the
Merger Consideration for the Certificate or Certificates that formerly evidenced
such Company Shares. The Company shall, prior to the Effective Time, use all
reasonable efforts to give Parent and Sub prompt notice of any written demands
for payment of the fair value of any Company Shares, withdrawals of such
demands, and any other instruments served on the Company pursuant to the TBCA
received by the Company relating to shareholders' rights of appraisal. Except
with the prior written consent of Parent and Sub, the Company shall not
voluntarily make any payment with respect to any demands for appraisal, or
settle or offer to settle any such demands.

         (f)  Adjustment of Exchange Ratio. In the event of any
reclassification, recapitalization, stock split, stock combination, stock
dividend or share exchange with respect to Parent Common Stock or Company
Shares, as the case may be, (or if a record date with respect to any of the
foregoing should occur) subsequent to the date of this Agreement but prior to
the Effective Time, appropriate and proportionate adjustments, if any, shall be
made to the Exchange Ratio, and all references to the Exchange Ratio in this
Agreement shall be deemed to be the Exchange Ratio as so adjusted.

    2.2  SURVIVING COMPANY TO MAKE CERTIFICATES AVAILABLE.

         (a)  Exchange of Certificates. The Company and Parent shall authorize
Continental Stock Transfer & Trust Company, New York, New York (or such other
person or persons as shall be reasonably acceptable to the Company and Parent)
to act as Exchange Agent hereunder (the "Exchange Agent"). As soon as
practicable after the Effective Time, Sub shall deposit with the Exchange Agent
for the benefit of the holders of certificates, which immediately prior to the
Effective Time represented Company Shares (the "Certificates"), the Cash
Consideration and certificates representing the shares of Parent Common Stock
(such Cash Consideration and shares of Parent Common Stock, together with any
dividends or distributions with respect thereto payable as provided in Section
2.3, being hereinafter referred to as the "Exchange Fund") issuable pursuant to
Section 2.1(c) in exchange for outstanding Company Shares.

         (b)  Exchange Procedures. Promptly after the Effective Time, the
Exchange Agent shall mail to each holder of record of a Certificate whose shares
were converted pursuant to Section 2.1 into shares of Parent Common Stock a
letter of transmittal (which shall specify that delivery shall be effected, and
risk of loss and title to the Certificates shall pass, only upon actual and
proper delivery of the Certificates to the Exchange Agent and shall contain
instructions for use in effecting the surrender of the Certificates in exchange
for the Cash Consideration and certificates representing shares of Parent Common
Stock and shall be in such form and contain such other provisions as the Company
and Parent may reasonably specify). Upon surrender of a Certificate for
cancellation to the Exchange Agent, together with such letter of transmittal,
duly executed, the holder of such Certificate shall be entitled to receive in
exchange therefor the Cash Consideration and a certificate representing that
number of whole shares of Parent Common Stock which such holder has the right to
receive pursuant to this Article 2, and the Certificate so surrendered shall
forthwith be canceled. Until surrendered as


                                       4


contemplated by this Section 2.2, each Certificate shall, at and after the
Effective Time, be deemed to represent only the right to receive, upon surrender
of such Certificate, the Cash Consideration, the certificate representing the
appropriate number of shares of Parent Common Stock, cash in lieu of fractional
shares, if any, as provided in Section 2.4 and certain dividends and other
distributions as contemplated by Section 2.3.

     2.3  DIVIDENDS; TRANSFER TAXES. No dividends or other distributions that
may be declared on or after the Effective Time on Parent Common Stock or are
payable to the holders of record thereof on or after the Effective Time will be
paid to persons entitled by reason of the Merger to receive certificates
representing Parent Common Stock until such persons surrender their
Certificates, as provided in Section 2.2, and no Cash Consideration or cash
payment in lieu of fractional shares shall be paid to any such holder pursuant
to Section 2.4 until such holder of such Certificate shall so surrender such
Certificate. Subject to the effect of applicable law, there shall be paid to the
record holder of the certificates representing such Parent Common Stock (a) at
the time of such surrender or as promptly as practicable thereafter, the amount
of any dividends or other distributions theretofore paid with respect to whole
shares of such Parent Common Stock and having a record date on or after the
Effective Time and a payment date prior to such surrender and (b) at the
appropriate payment date or as promptly as practicable thereafter, the amount of
dividends or other distributions payable with respect to whole shares of Parent
Common Stock and having a record date on or after the Effective Time but prior
to surrender and a payment date subsequent to surrender. In no event shall the
person entitled to receive such dividends or other distributions be entitled to
receive interest on such dividends or other distributions. If any cash or
certificate representing shares of Parent Common Stock is to be paid to or
issued in a name other than that in which the Certificate surrendered in
exchange therefor is registered, it shall be a condition of such exchange that
the Certificate so surrendered shall be properly endorsed and otherwise in
proper form for transfer and that the person requesting such exchange shall pay
to the Exchange Agent any transfer or other taxes required by reason of the
issuance of certificates for such shares of Parent Common Stock in a name other
than that of the registered holder of the Certificate surrendered, or shall
establish to the satisfaction of the Exchange Agent that such tax has been paid
or is not applicable.

     2.4  NO FRACTIONAL SHARES. No certificates or scrip representing fractional
shares of Parent Common Stock shall be issued upon the surrender for exchange of
Certificates pursuant to this Article 2, and no Parent dividend or other
distribution or stock split or combination shall relate to any fractional
security, and such fractional interests shall not entitle the owner thereof to
vote or to any rights of a security holder of Parent. In lieu of any such
fractional securities, each holder of Company Shares who would otherwise have
been entitled to receive a fraction of a share of Parent Common Stock (after
taking into account all Company Shares then held of record by such holder) shall
receive cash (without interest) in an amount equal to the product of such
fractional part of a share of Parent Common Stock multiplied by the Closing
Price and rounded to the nearest cent. As used in this Agreement, (a) "Closing
Price" means the average of the midpoint of the daily high and low trading
prices of Parent Common Stock, rounded to four decimal places, as reported under
Nasdaq National Market Issues Reports in The Wall Street Journal for each of the
first 20 consecutive Trading Days in the period commencing twenty-five (25)
Trading Days prior to the date of the Closing and (b) "Trading Day" means a day
on which the National Association of Securities Dealers, Inc. National Market
("Nasdaq National Market") is open for trading.


                                       5


     2.5  RETURN OF EXCHANGE FUND. Any portion of the Exchange Fund that remains
undistributed to the former shareholders of the Company for one year after the
Effective Time shall be delivered to Parent, upon demand of Parent, and any
former shareholders of the Company who have not theretofore complied with this
Article 2 shall thereafter look only to Parent for payment of their claim for
Parent Common Stock, Cash Consideration, any cash in lieu of fractional shares
of Parent Common Stock and any dividends or distributions with respect to Parent
Common Stock. None of the Company, Parent nor the Surviving Company shall be
liable to any holder of Company Shares for shares (or dividends or distributions
with respect thereto) or cash in lieu of fractional shares of Parent Common
Stock delivered to a public official pursuant to any applicable abandoned
property, escheat or similar law.

     2.6  FURTHER OWNERSHIP RIGHTS IN COMPANY COMMON STOCK. All shares of Parent
Common Stock issued upon the surrender for exchange of Certificates in
accordance with the terms hereof (including any cash paid pursuant to Sections
2.3 or 2.4) shall be deemed to have been issued in full satisfaction of all
rights pertaining to the Company Shares, subject, however, to the Surviving
Company's obligation to pay any dividends or make any other distribution with a
record date prior to the Effective Time which may have been declared or made by
the Company on Company Shares in accordance with the terms of this Agreement.

     2.7  CLOSING OF THE COMPANY TRANSFER BOOKS. At the Effective Time, the
stock transfer books of the Company shall be closed and no transfer of Company
Shares shall thereafter be made. If, after the Effective Time, Certificates are
presented to the Surviving Company, they shall be canceled and exchanged as
provided in this Article 2.

                                   ARTICLE 3

                         REPRESENTATIONS AND WARRANTIES


     3.1  REPRESENTATIONS AND WARRANTIES OF THE COMPANY. The Company represents
and warrants to Parent and Sub as follows, subject to any exceptions specified
in the Company Disclosure Schedule in the form attached hereto as Schedule I to
the extent that such exceptions reference a specific section of this Article 3
(the "Company Disclosure Schedule"):

         (a)  Organization, Standing and Power. The Company is a corporation
duly organized, validly existing and in good standing under the laws of the
State of Texas and has the requisite corporate power and authority to own, lease
and operate its properties and to carry on its business as now being conducted.
The Company is duly qualified to do business and is in good standing in each
jurisdiction in which the nature of its business or the ownership or leasing of
its properties makes such qualification necessary, other than in such
jurisdictions where the failure to be so qualified to do business or in good
standing (individually or in the aggregate) would not have, or would not
reasonably be likely to have, a material adverse effect (as defined in Section
9.3(c)) on the Company.

         (b)  No Subsidiaries. The Company has no subsidiaries, and does not
own, directly or indirectly, any capital stock, equity interest or other
ownership interest in any corporation, partnership, association, joint venture,
limited liability company or other entity.


                                       6


         (c)  Capital Structure. As of the date hereof, the authorized capital
stock of the Company consists of 50,000,000 Company Shares and 10,000,000 of
preferred stock, par value $0.10 per share. At the close of business on May 23,
2003, (i) 5,494,136 Company Shares and no shares of preferred stock were issued
and outstanding; (ii) 584,250 Company Shares were reserved for issuance by the
Company pursuant to options or stock awards granted under the following plans:



          Plan                                    Shares Reserved
          ----                                    ---------------
                                                   
1994 Stock Option Plan                                240,000
1998 Stock Option Plan                                344,250
Directors' Fee Stock Plan                                0



(collectively, the "Company's Stock Plans"), (iii) 276,000 Company Shares were
reserved for issuance pursuant to options or stock awards not yet granted under
the Company's Stock Plans and (iv) 1,268,739 Company Shares were held by the
Company in its treasury. The Company has no outstanding stock appreciation
rights ("SARs"). The Company Shares are listed on the Nasdaq National Market.
Except as set forth above, no shares of capital stock or other equity or voting
securities of the Company are reserved for issuance or are outstanding. All
outstanding shares of capital stock of the Company are, and all Company Shares
issuable upon the exercise of stock options will be when issued thereunder,
validly issued, fully paid and nonassessable and not subject to preemptive
rights. No capital stock has been issued by the Company since the Company
Balance Sheet Date (as defined in Section 3.1(e)), other than Company Shares
issued pursuant to options outstanding on or prior to such date in accordance
with their terms at such date. Except for options described above, as of the
date hereof there are no outstanding or authorized securities, options,
warrants, calls, rights, commitments, preemptive rights, agreements,
arrangements or undertakings of any kind to which the Company is a party, or by
which it is bound, obligating the Company to issue, deliver or sell, or cause to
be issued, delivered or sold, any shares of capital stock or other equity or
voting securities of, or other ownership interests in, the Company or obligating
the Company to issue, grant, extend or enter into any such security, option,
warrant, call, right, commitment, agreement, arrangement or undertaking. There
are not as of the date of this Agreement and there will not be at the Effective
Time any shareholder agreements, voting trusts or other agreements or
understandings to which the Company is a party or by which it is bound relating
to the voting of any shares of the capital stock of the Company. True and
correct copies of all agreements, instruments and other governing documents
relating to the Company's Stock Plans have been furnished to Parent.

         (d)  Authority; Non-contravention. The Company has the requisite
corporate power and authority to enter into this Agreement and, subject to
Company Shareholder Approval (as defined in Section 3.1(j)), to consummate the
Merger and other transactions contemplated hereby and to take such actions, if
any, as shall have been taken with respect to the matters referred to in Section
3.1(j). The execution and delivery of this Agreement by the Company and the
consummation by the Company of the transactions contemplated hereby have been
duly authorized by all necessary corporate action on the part of the Company,
subject to Company Shareholder Approval. This Agreement has been duly and
validly executed and delivered by the Company and constitutes a valid and
binding obligation of the Company, enforceable against the Company in accordance
with its terms, except as (i) such enforcement may be subject to


                                       7


bankruptcy, insolvency, reorganization, moratorium or other similar laws or
judicial decisions now or hereafter in effect relating to creditors' rights
generally and (ii) the remedy of specific performance and injunctive relief may
be subject to equitable defenses and to the discretion of the court before which
any proceeding therefor may be brought. The execution and delivery of this
Agreement by the Company do not, and the consummation of the transactions
contemplated hereby and compliance with the provisions hereof will not, conflict
with, or result in any violation of, or default (with or without notice or lapse
of time, or both) under, or give rise to a right of termination, cancellation or
acceleration of or "put" right with respect to any obligation or to loss of a
material benefit under, or result in the creation of any lien, mortgage, pledge,
security interest, charge, claim or other encumbrance of any kind or nature
("Liens") on any of the properties or assets of the Company under, any provision
of (i) the Articles of Incorporation or bylaws of the Company, each as amended
through the date hereof (the "Company Charter Documents"), (ii) any loan or
credit agreement, note, bond, mortgage, indenture, lease, or other agreement,
instrument, permit, concession, franchise or license applicable to the Company
or its properties or assets or (iii) subject to governmental filings and other
matters referred to in the following sentence, any judgment, order, decree,
statute, law, ordinance, rule or regulation or arbitration award applicable to
the Company or its properties or assets, other than, in the case of clauses (ii)
and (iii), any such conflicts, violations, defaults, rights or Liens that
individually or in the aggregate would not have, or would not reasonably be
likely to have, a material adverse effect on the Company and would not, or would
not reasonably be likely to, materially impair the ability of the Company to
perform its obligations hereunder or prevent the consummation of any of the
transactions contemplated hereby. No consent, approval, order or authorization
of, or registration, declaration or filing with, any court, administrative
agency or commission or other governmental authority or agency, domestic or
foreign, including local authorities (a "Governmental Entity"), is required by
or with respect to the Company in connection with the execution and delivery of
this Agreement by the Company or the consummation by the Company of the
transactions contemplated hereby, except for (i) the filing of a premerger
notification and report form by the Company under the Hart-Scott-Rodino
Antitrust Improvements Act of 1976, as amended (the "HSR Act"), (ii) the filing
with the Securities and Exchange Commission (the "SEC") of (A) a proxy statement
relating to the Company Shareholder Approval (such proxy statement as amended or
supplemented from time to time, the "Proxy Statement/Prospectus"), (B) filings
under Rule 14a-12 promulgated under the Exchange Act and (C) such reports under
Section 13(a) of the Securities Exchange Act of 1934, as amended (the "Exchange
Act"), as may be filed in connection with this Agreement and the transactions
contemplated hereby, (iii) the filing of the Articles of Merger with the
Secretary of State of Texas with respect to the Merger as provided in the TBCA
and appropriate documents with the relevant authorities of other jurisdictions
in which the Company is qualified to do business and (iv) such other consents,
approvals, orders, authorizations, registrations, declarations and filings the
failure of which to be obtained or made would not have, or would not reasonably
be likely to have, a material adverse effect on the Company.

         (e)  Company SEC Documents. The Company has filed all required reports,
schedules, forms, statements and other documents with the SEC since April 1,
1999 (such documents, together with all exhibits and schedules thereto and
documents incorporated by reference therein, collectively referred to herein as
the "Company SEC Documents"). As of their respective dates, the SEC Documents
complied in all material respects with the requirements of the Securities Act of
1933, as amended (the "Securities Act"), or the Exchange Act, as the case


                                       8


may be, and the rules and regulations of the SEC promulgated thereunder
applicable to the Company SEC Documents, and none of the Company SEC Documents
contained any untrue statement of a material fact or omitted to state a material
fact required to be stated therein or necessary in order to make the statements
therein, in light of the circumstances under which they were made, not
misleading. The Company's disclosure controls and procedures (as defined in
Sections 13a-14(c) and 15d-14(c) of the Exchange Act) effectively enable the
Company to comply with, and the appropriate officers of the Company to make all
certifications required under, the Sarbanes-Oxley Act of 2002 and the
regulations promulgated thereunder (the "Sarbanes-Oxley Act"). The financial
statements of the Company included in the Company SEC Documents comply in all
material respects with applicable accounting requirements and the published
rules and regulations of the SEC with respect thereto, have been prepared in
accordance with generally accepted accounting principles (except, in the case of
unaudited statements, as permitted by Form 10-Q of the SEC) applied on a
consistent basis during the periods involved (except as may be indicated in the
notes thereto) and fairly present the financial position of the Company as of
the dates thereof and the results of its operations and cash flows for the
periods then ended (subject, in the case of unaudited statements, to normal
year-end audit adjustments and other adjustments described therein). There is no
liability or obligation of any kind, whether accrued, absolute, determined,
determinable or otherwise, of the Company that is required by generally accepted
accounting principles to be reflected or reserved against or otherwise disclosed
in the most recent financial statements of the Company included in the Company
SEC Documents which is not so reflected or reserved against that individually or
in the aggregate would have a material adverse effect on the Company. For
purposes of this Agreement, "Company Balance Sheet" means the balance sheet as
of December 31, 2002 set forth in the Company's Quarterly Report on Form 10-Q
for the quarter ended December 31, 2002 and "Company Balance Sheet Date" means
December 31, 2002. To the Company's knowledge, (i) its appropriate officers will
be able to make the certifications required under the Sarbanes-Oxley Act with
respect to its Annual Report on Form 10-K for the year ended March 31, 2003 and
(ii) the report of KPMG LLP on its audited financial statements included therein
will be unqualified.

         (f)  Information Supplied. None of the information supplied or to be
supplied by the Company in writing for inclusion or incorporation by reference
in the Registration Statement on Form S-4 to be filed with the SEC in connection
with the issuance of shares of Parent Common Stock in the Merger (the "S-4")
will, at the time the S-4 is filed with the SEC or when it becomes effective
under the Securities Act, contain any untrue statement of a material fact or
omit to state any material fact required to be stated therein or necessary to
make the statements therein not misleading, and none of the information supplied
or to be supplied by the Company in writing for inclusion or incorporation by
reference in the Proxy Statement/Prospectus relating to the Shareholder Meeting
(defined below) will, at the date the Proxy Statement/Prospectus is mailed to
the Company's shareholders and at the time of the Company's shareholders meeting
convened for the purpose of obtaining the Company Shareholder Approval (the
"Shareholder Meeting"), contain any untrue statement of a material fact or omit
to state any material fact required to be stated therein or necessary in order
to make the statements therein, in light of the circumstances under which they
are made, not misleading. The Proxy Statement/Prospectus, as it relates to the
Shareholder Meeting, will comply as to form in all material respects with the
requirements of the Exchange Act and the rules and regulations thereunder,
except that no representation or warranty is made by the Company in this


                                       9


Section 3.1(f) with respect to statements made or incorporated by reference
therein based on information supplied by Parent or Sub in writing for inclusion
or incorporation by reference in the S-4 or the Proxy Statement/Prospectus.

         (g)  Absence of Certain Changes or Events. Except as disclosed in the
Company SEC Documents filed with the SEC prior to the date hereof, since the
Company Balance Sheet Date, the Company has conducted its business only in the
ordinary course consistent with past practice and as permitted by Article 4, and
there has not been

              (i)  any event, occurrence, circumstance or development that has
         had, or has been reasonably likely to have, a material adverse effect
         with respect to the Company;

              (ii)  any declaration, setting aside or payment of any dividend
         (whether in cash, stock or property) with respect to any of the
         Company's capital stock or any repurchase, redemption or other
         acquisition by the Company of any amount of outstanding shares of
         capital stock or other equity securities of, or other ownership
         interests in, the Company;

              (iii)  any amendment of any term of any outstanding security of
         the Company that would materially increase the obligations of the
         Company under such security;

              (iv)  (A) any incurrence or assumption by the Company of any
         indebtedness for borrowed money other than under existing credit
         facilities (or any renewals, replacements or extensions thereof that do
         not materially increase the commitments thereunder) or otherwise by the
         Company in the ordinary course of business consistent with past
         practices, or (B) any guaranty, endorsement or other incurrence or
         assumption of liability, whether directly, contingently or otherwise,
         by the Company for the obligations of any other person, other than in
         the ordinary course of business consistent with past practice or in
         connection with the obligations of the Company assumed at the Effective
         Time;

              (v)  any creation or assumption by the Company of any Lien on any
         material asset of the Company other than in the ordinary course of
         business consistent with past practices;

              (vi)  any making of any loan, advance or capital contribution to
         or material investment in any person by the Company other than loans,
         advances, capital contributions or investments, in each case not
         exceeding $10,000;

              (vii)  (A) any contract or agreement entered into by the Company
         on or prior to the date hereof relating to any material acquisition or
         disposition of any assets or business or (B) any modification,
         amendment, assignment, termination or relinquishment by the Company of
         any contract, license or other right (including any insurance policy
         naming it as a beneficiary or loss payable payee) that reasonably would
         be likely to have a material adverse effect on the Company,


                                       10


         other than transactions, commitments, contracts or agreements in the
         ordinary course of business consistent with past practices and those
         contemplated by this Agreement;

              (viii)  (A) any granting by the Company to any officer of the
         Company of any increase in compensation, except in the ordinary course
         of business consistent with prior practice or as was required under
         employment agreements in effect as of the Company Balance Sheet Date,
         (B) any granting by the Company to any such officer of any increase in
         severance or termination pay, except as was required under employment,
         severance or termination agreements in effect as of the Company Balance
         Sheet Date, or (C) except in accordance with past practice as to
         officers, any entry by the Company into any employment, severance or
         termination agreement with any such officer;

              (ix)  any damage, destruction or loss, whether or not covered by
         insurance, that has or reasonably could be expected to have a material
         adverse effect on the Company;

              (x)  any change in accounting methods, principles or practices by
         the Company materially affecting its assets, liabilities or business,
         except insofar as may have been required by a change in generally
         accepted accounting principles; or

              (xi)  any event which, if it had taken place following the
         execution of this Agreement, would not have been permitted by Section
         4.1.

         (h)  No Undisclosed Material Liabilities. There have been no
liabilities or obligations, whether pursuant to contracts or otherwise, of any
kind whatsoever incurred by the Company whether accrued, contingent, absolute,
determined, determinable or otherwise, other than:

              (i)  liabilities or obligations (A) disclosed or provided for in
         the Company Balance Sheet or (B) disclosed in the Company SEC Documents
         filed with the SEC prior to the date of this Agreement;

              (ii) liabilities or obligations which, individually and in the
         aggregate, have not had and are not reasonably likely to have a
         material adverse effect on the Company; or

              (iii) liabilities or obligations under this Agreement or incurred
         in connection with the transactions contemplated hereby.

         (i)  No Default. The Company is not in default or violation (and no
event has occurred which, with notice or the lapse of time or both, would
constitute a default or violation) of any term, condition or provision of (i)
the Company Charter Documents, (ii) any note, bond, mortgage, indenture,
license, agreement or other instrument or obligation to which the Company is now
a party or by which the Company or any of its properties or assets may be bound
or (iii) any order, writ, injunction, decree, statute, rule or regulation
applicable to the Company, except


                                       11


in the case of clauses (ii) and (iii) for defaults or violations which in the
aggregate would not have a material adverse effect on the Company.

         (j)  State Takeover Statutes; Absence of Supermajority Provision. The
Company has taken all action to assure that Article 13.03 of the TBCA shall not
apply to the Merger or any of the other transactions contemplated hereby. Except
for the approval of the Merger by the holders of two-thirds of the outstanding
Company Shares, voting together as a class pursuant to which each share of
Company Share is entitled to one vote ("Company Shareholder Approval"), no other
shareholder action on the part of the Company is required for approval of the
Merger Agreement and the transactions contemplated hereby. The Company has taken
such action with respect to any other anti-takeover provisions in the Company
Charter Documents to the extent necessary to consummate the Merger on the terms
set forth in this Agreement.

         (k)  Litigation. There is no suit, action, proceeding or investigation
presently pending or, to the Company's knowledge, threatened against or
affecting the Company that has had or could reasonably be expected to have a
material adverse effect on the Company or prevent, hinder or materially delay
the ability of the Company to consummate the transactions contemplated by this
Agreement, nor is there any judgment, decree, injunction, rule or order of any
Governmental Entity or arbitrator outstanding against the Company which has had,
or which, insofar as reasonably can be foreseen, in the future could have, any
such effect.

         (l)  Employee Benefit Matters. As used in this Section 3.1(l), the term
"Employer" shall mean the Company as defined in the preamble of this Agreement
and any member of a controlled group or affiliated service group, as defined in
sections 414(b), (c), (m) and (o) of the Code, or section 4001 of the Employee
Retirement Income Security Act of 1974, as amended ("ERISA") of which the
Company is a member. As used in this Section 3.1(l), "Company Benefit Plan"
shall mean (1) any employee welfare benefit plan or employee pension benefit
plan as defined in sections 3(1) and 3(2) of ERISA, including, but not limited
to, a plan that provides retirement income or results in deferrals of income by
employees for periods extending to their terminations of employment or beyond,
and a plan that provides medical, surgical or hospital care benefits or benefits
in the event of sickness, accident, disability, death or unemployment and (2)
any other employee benefit agreement or arrangement that is not an ERISA plan,
including without limitation, any deferred compensation plan, incentive plan,
bonus plan or arrangement, stock option plan, stock purchase plan, stock award
plan, golden parachute agreement, severance pay plan, dependent care plan,
flexible benefit plan, cafeteria plan, employee assistance program, scholarship
program, employment contract, retention incentive agreement, noncompetition
agreement, consulting agreement, confidentiality agreement, vacation policy, or
other similar plan or agreement or arrangement that has been maintained by,
participated in, or contributed to by the Employer at any time during the
three-year period ending on the date of this Agreement, or with respect to which
the Employer may have any liability.

              (i)  Section 3.1(l)(i) of the Company Disclosure Schedule contains
         a complete and correct list of all Company Benefit Plans. With respect
         to each Company Benefit Plan, except as disclosed in Section 3.1(l)(i)
         of the Company Disclosure Schedule, to the extent applicable: (A) the
         plan is in compliance with the Code and ERISA, including all reporting
         and disclosure requirements of


                                       12


         Part 1 of Subtitle B of Title I of ERISA; (B) the appropriate Form 5500
         has been timely filed for each year of its existence or a "top-hat"
         statement was timely filed with the Department of Labor pursuant to
         Department of Labor Regulation section 2520.104-23; (C) there has been
         no transaction described in section 406 or section 407 of ERISA or
         section 4975 of the Code unless exempt under section 408 of ERISA or
         section 4975 of the Code, as applicable; (D) the bonding requirements
         of section 412 of ERISA have been satisfied; (E) there is no issue
         pending nor any issue resolved adversely to the Employer which may
         subject the Employer to the payment of a penalty, interest, tax or
         other amount, (F) each Company Benefit Plan can be unilaterally
         terminated or amended by the Employer on no more than 90 days notice;
         (G) all contributions or other amounts payable by the Employer as of
         the Effective Time with respect to each Company Benefit Plan have
         either been paid or accrued in the Employer's most recent financial
         statements included in the SEC Documents and (H) no notice has been
         given or received by the Employer of an increase or proposed increase
         in the cost of the plan. There are no pending or, to the Company's
         knowledge, threatened or anticipated claims (other than routine claims
         for benefits), actions, arbitrations, audits, investigations or suits
         by, on behalf of, against or relating to any Company Benefit Plan or
         their related trusts. With respect to each Company Benefit Plan, the
         Company has provided to Parent true and correct copies of each of the
         following documents:

                   (A)  the Company Benefit Plan and any amendments thereto (or
              if the Company Benefit Plan is not a written agreement, a
              description thereof);

                   (B)  the three most recent annual Form 5500 reports filed
              with the Internal Revenue Service ("IRS");

                   (C)  a written summary of the legal basis for an exemption
              from the obligation to file annual Form 5500 reports;

                   (D)  the most recent summary plan description and summaries
              of material modifications thereof; and

                   (E)  the funding agreement that provides for the funding of
              the Company Benefit Plan.

              (ii) Neither the Company nor any entity (whether or not
         incorporated) that was at any time during the six years before the date
         of this Agreement treated as a single employer together with the
         Company under section 414 of the Code or section 4001 of ERISA has ever
         maintained, had any obligation to contribute to or incurred any
         liability with respect to a pension plan that is or was subject to the
         provisions of Title IV of ERISA or section 412 of the Code. During the
         last six years, the Employer has not maintained, had an obligation to
         contribute to or incurred any liability with respect to a voluntary
         employees beneficiary association that is or was intended to satisfy
         the requirements of section 501(c)(9)


                                       13


         of the Code. No plan, arrangement or agreement with any one or more
         employees will cause the Employer to have liability for severance pay
         as a result of the Merger, except as disclosed in Section 3.1(l)(ii) of
         the Company Disclosure Schedule. Except as disclosed in Section
         3.1(l)(ii) of the Company Disclosure Schedule, the Employer does not
         provide employee benefits, including without limitation, death,
         post-retirement medical or health coverage (whether or not insured) or
         contribute to or maintain any employee benefit plan which provides for
         benefit coverage following termination of employment except as is
         required by section 4980B(f) of the Code or other similar applicable
         statute, nor has it made any representations, agreements, covenants or
         commitments to provide that coverage. Any employee benefit plan that is
         disclosed on Section 3.1(l)(ii) of the Company Disclosure Schedule has,
         at all times since its inception, provided that the sponsor of the plan
         has the right to amend and terminate the plan at any time without the
         consent of any party and no statements have been made to plan
         participants or their dependents that would lead such persons to
         reasonably conclude the plan may not be amended or terminated without
         their consent. All Company Benefit Plans that are group health plans
         have been operated in material compliance with section 4980B(f) of the
         Code.

              (iii)  The Company does not maintain or contribute to, and has not
         maintained or contributed to for the three-year period ending on the
         date of this Agreement, a pension plan that is intended to qualify
         under section 401(a) of the Code or a pension plan described in section
         3(2) of ERISA. Any pension plan described in section 3(2) of ERISA
         previously maintained by the Company was terminated in accordance with
         ERISA and the Code.

              (iv)  The transactions contemplated by this Agreement, either
         alone or in conjunction with another event (such as termination of
         employment) will not accelerate the time of payment of any contribution
         to a Company Benefit Plan, accelerate vesting under a Company Benefit
         Plan, increase the amount of compensation directly or indirectly due
         any person from the Employer, or increase the cost of any Company
         Benefit Plan.

              (v)  With respect to any entity (whether or not incorporated) that
         is both treated as a single employer together with the Company under
         section 414 of the Code or section 4001 of ERISA and located outside of
         the United States, any benefit plans maintained by it for the benefit
         of its directors, officers, employees or former employees (or any of
         their beneficiaries) are in compliance with applicable laws pertaining
         to such plans in the jurisdiction of such entity, except where such
         failure to be in compliance would not, either individually or in the
         aggregate, have a material adverse effect on the Company.

        (m)  Taxes. The Company has timely filed (taking into account any
extensions) all Tax Returns required to be filed by it on or before the
Effective Time and has timely paid or deposited all Taxes and estimated Taxes
which are required to be paid or deposited on or before the Effective Time. Each
of the Tax Returns filed by the Company is accurate and complete in all material
respects and has been completed in all material respects in accordance with


                                       14


applicable laws, regulations and rules. The Company Balance Sheet reflects an
adequate reserve for all Taxes for which the Company may be liable for all
taxable periods and portions thereof through the date thereof. The Company has
not waived any statute of limitations in respect of Taxes of the Company. No
material deficiencies for any Taxes have been proposed, asserted or assessed
against the Company, no requests for waivers of the time to assess any such
Taxes have been granted or are pending, and there are no Tax Liens upon any
assets of the Company (except for liens for ad valorem Taxes not yet delinquent
and other Taxes not yet due and payable). There are no current examinations of
any Tax Return of the Company being conducted by any governmental authority and
there are no settlements of any prior examinations which could reasonably be
expected to adversely affect any taxable period for which the statute of
limitations has not run. The Company is not a party to a Tax allocation
agreement, Tax sharing agreement, Tax indemnity agreement or similar agreement
or arrangement. The Company has complied in all material respects with all
applicable laws, rules and regulations relating to the payment and withholding
of Taxes and has in all respects timely withheld from employee wages and paid
over such Taxes to the appropriate governmental entity. As used herein, "Tax" or
"Taxes" shall mean all taxes of any kind, including, without limitation, those
on or measured by or referred to as federal, state, local or foreign income,
gross receipts, property, sales, use, ad valorem, franchise, profits, license,
withholding, payroll, alternative or added minimum, employment, estimated,
excise, transfer, severance, stamp, occupation, premium, value added, or
windfall profits taxes, customs, duties or similar fees, assessments or charges
of any kind whatsoever, together with any interest and any penalties, additions
to tax or additional amounts imposed by any Governmental Entity. As used herein,
"Tax Return" shall mean any return, report, statement or information required to
be filed with any Governmental Entity with respect to Taxes.

         (n)  No Excess Parachute Payments. No amount that could be paid
(whether in cash or property or the vesting of property) as a result of any of
the transactions contemplated by this Agreement to any person who is properly
characterized as a "disqualified individual" (as such term is defined by the IRS
in proposed Treasury Regulation section 1.280G-1) under any employment,
severance or termination agreement, other compensation arrangement or other
Company Benefit Plan currently in effect would be characterized as an "excess
parachute payment" (as such term is defined in section 280G(b)(1) of the Code).

         (o)  Environmental Matters. Except to the extent that the inaccuracy of
any of the following, individually or in the aggregate, would not have a
material adverse effect on the Company:

              (i)  the Company holds, and is in compliance with and has been in
         compliance with, all Environmental Permits required under applicable
         Environmental Laws for the operation or use of its assets and
         properties or the conduct its business, and is otherwise in compliance
         and has been in compliance with all applicable Environmental Laws;

              (ii)  there are no existing or, to the knowledge of the Company,
         proposed requirements under Environmental Laws that will require the
         Company to make capital improvements to its assets or properties or
         make other expenditures to remain in compliance with Environmental
         Laws;


                                       15


              (iii) the Company has not received any Environmental Claim, nor
         has any Environmental Claim been threatened against the Company;

              (iv)  the Company has not entered into or agreed to, or is not
         subject to any outstanding judgment, decree, order or consent
         arrangement with any governmental authority under any Environmental
         Laws, including without limitation those relating to compliance with
         any Environmental Laws or to the investigation, cleanup, remediation or
         removal of Hazardous Materials;

              (v)  there are no agreements with any person pursuant to which the
         Company would be required to defend, indemnify, hold harmless, or
         otherwise be responsible for any violation by or other liability or
         expense of such person, or alleged violation by or other liability or
         expense of such person, arising out of any Environmental Law;

              (vi) to the Company's knowledge, there are no other facts,
         circumstances or conditions that are reasonably likely to give rise to
         liability of the Company under any Environmental Laws or to result in
         the assertion of an Environmental Claim against the Company; and

              (vii) the Company has provided the Parent copies of all
         environmental audits, assessments or other evaluations, if any, of the
         Company or any of its assets, properties or business operations.

         For purposes of this Agreement, the terms below shall have the
following meanings:

         "Environmental Claim" means any complaint, notice, claim, demand,
action, suit or judicial, administrative or arbitral proceeding by any person
to, against or involving the Company asserting liability or potential liability
(including without limitation, liability or potential liability for
investigatory costs, cleanup costs, governmental response costs, natural
resource damages, property damage, personal injury, fines or penalties) arising
out of, relating to, based on or resulting from (i) the use, presence, disposal,
discharge, emission, release or threatened release of any Hazardous Materials at
any location, (ii) circumstances forming the basis of any violation or alleged
violation of any Environmental Laws or Environmental Permits, or (iii) otherwise
relating to obligations or liabilities of the Company under any Environmental
Law or in connection with Hazardous Materials.

         "Environmental Permits" means all permits, licenses, registrations,
exemptions and other governmental authorizations required under Environmental
Laws for the Company to conduct its operations as presently conducted.

         "Environmental Laws" means all applicable foreign, federal, state and
local statutes, rules, regulations, ordinances, orders, decrees and common law
relating in any manner to pollution, protection of the environment or the use,
storage, treatment or disposal of Hazardous Materials.

         "Hazardous Materials" means all hazardous or toxic substances, wastes,
materials


                                       16


or chemicals, petroleum (including crude oil or any fraction thereof) and
petroleum products, asbestos and asbestos-containing materials, pollutants,
contaminants and all other materials and substances, including but not limited
to radioactive materials, regulated pursuant to any Environmental Laws.

         (p)  Compliance with Laws; Permits. The Company holds all required,
necessary or applicable federal, state, provincial, local or foreign permits,
licenses, variances, exemptions, orders, franchises and approvals of all
Governmental Entities, except where the failure to so hold would not have a
material adverse effect on the Company (the "Company Permits"). The Company is
in compliance with the terms of the Company Permits except where the failure to
so comply would not have a material adverse effect on the Company. The Company
has not received notice of any revocation or modification of any of the Company
Permits, the revocation or modification of which would have a material adverse
effect on the Company. The Company has not violated or failed to comply with any
statute, law, ordinance, regulation, rule, permit or order of any Governmental
Entity, or any arbitration award or any judgment, decree or order of any
Governmental Entity, applicable to the Company or its business, assets or
operations, except for violations and failures to comply that could not,
individually or in the aggregate, reasonably be expected to have a material
adverse effect on the Company. To the knowledge of the Company, no investigation
or review by any Governmental Entity with respect to the Company is pending or
threatened, other than those the outcome of which would not have a material
adverse effect on the Company.

         (q)  Material Contracts and Agreements. Except contracts, agreements
and arrangements made in the ordinary course of business, the Company is not
bound by any oral or written material contract (as defined in Item 601(b)(10) of
SEC Regulation S-K) to be performed after the date hereof that has not been
filed with or incorporated by reference in the Company SEC Documents filed with
the SEC prior to the date of this Agreement. Section 3.1(q) of the Company
Disclosure Schedule lists (i) each guaranty of the Company, (ii) each oral or
written contract, agreement and arrangement to which the Company is a party or
any of its assets are bound which, as of the date of this Agreement, would be
required to be filed as exhibits to the Company's Annual Report on Form 10-K for
the fiscal year ended March 31, 2003 or Quarterly Report on Form 10-Q for the
quarterly period ending June 30, 2003 and (iii) each oral or written contract,
agreement and arrangement between the Company and any employee or consultant.

         (r)  Title to Properties.

              (i)  The Company has good and defensible title to, or valid
         leasehold interests in, all of its material assets and properties
         purported to be owned by it in the Company SEC Documents, except for
         such assets and properties as are no longer used or useful in the
         conduct of its businesses or as have been disposed of in the ordinary
         course of business and except for (A) defects in title set forth on
         Section 3.1(r)(i) of the Company Disclosure Schedule and (B) such
         imperfections of title, easements, rights of way and similar liens or
         other matters and failures of title as would not, individually or in
         the aggregate, have a material adverse effect on the Company or
         materially interfere with the Company's use of such assets or
         properties. All such assets and properties, other than assets and
         properties in which the Company has leasehold interests, are free and
         clear of all Liens, other


                                       17


         than those (w) set forth in the Company SEC Documents and (x) Liens set
         forth in the Company Disclosure Schedule, (y) Liens for current Taxes
         not yet due and payable and except for Liens, that, in the aggregate,
         do not and will not materially interfere with the ability of the
         Company to conduct business as currently conducted or as reasonably
         expected to be conducted.

              (ii)  Except as would not have a material adverse effect on the
         Company, the Company has complied in all material respects with the
         terms of all leases to which it is a party and under which it is in
         occupancy, and all such leases are in full force and effect. The
         Company enjoys peaceful and undisturbed possession under all such
         leases.

         (s)  Intellectual Property. The Company owns, or is licensed or
otherwise has the right to use, all patents, patent rights, trademarks,
trademark rights, trade names, trade name rights, service marks, service mark
rights, copyrights, technology, know-how, processes and other proprietary
intellectual property rights and computer programs which are material to the
condition (financial or otherwise) or conduct of the business and operations of
the Company. To the Company's knowledge, (i) the use of such patents, patent
rights, trademarks, trademark rights, service marks, service mark rights, trade
names, copyrights, technology, know-how, processes and other proprietary
intellectual property rights and computer programs by the Company in its current
operations does not infringe on the intellectual property rights of any person,
subject to such claims and infringements as do not, in the aggregate, give rise
to any liability on the part of the Company which could have a material adverse
effect on the Company, and (ii) no person is, in any manner that could have a
material adverse effect on the Company, infringing on any right of the Company
with respect to any such patents, patent rights, trademarks, trademark rights,
service marks, service mark rights, trade names, copyrights, technology,
know-how, processes and other proprietary intellectual property rights and
computer programs. No claims are pending or, to the Company's knowledge,
threatened that the Company is infringing or otherwise adversely affecting the
rights of any person with regard to any patent, license, trademark, trade name,
service mark, copyright or other intellectual property right.

         (t)  Labor Matters.

              (i)   The Company is not a party to any collective bargaining
         agreement or other material contract or agreement with any labor
         organization or other representative of employees nor is any such
         contract being negotiated;

              (ii)  there is no material unfair labor practice charge or
         complaint pending nor, to the knowledge of the Company, threatened,
         with regard to employees of the Company;

              (iii) there is no labor strike, material slowdown, material work
         stoppage or other material labor controversy in effect, or, to the
         knowledge of the Company, threatened against the Company;

              (iv)  to the knowledge of the Company, as of the date hereof, no
         representation question exists, nor are there any campaigns being
         conducted to


                                       18


         solicit cards from the employees of the Company to authorize
         representation by any labor organization;

              (v)  the Company is not a party to, or is not otherwise bound by,
         any consent decree with any governmental authority relating to
         employees or employment practices of the Company;

              (vi) the Company has not incurred any liability under, and the
         Company has complied in all respects with, the Worker Adjustment
         Retraining Notification Act, and no fact or event exists that could
         give rise to liability under such Act;

              (vii) the Company is in compliance with all applicable agreements,
         contracts and policies relating to employment, employment practices,
         wages, hours and terms and conditions of employment of the employees,
         except where the failure to be in compliance with each such agreement,
         contract and policy would not, either singly or in the aggregate, have
         a material adverse effect on the Company;

              (viii) there is no complaint, lawsuit or proceeding pending or to
         the knowledge of the Company, threatened in any forum by any
         Governmental Entity, by or on behalf of any present or former employee,
         any applicant for employment or any classes of the foregoing alleging
         breach of any express or implied contract of employment, any law or
         regulation governing employment or the termination thereof or other
         discriminatory, wrongful or tortious conduct in connection with the
         employment relationship against the Company pending, or, to the best
         knowledge of the Company, threatened, that has, or would have, a
         material adverse effect on the Company;

              (ix) there is no ongoing or pending proceeding or investigation
         under, and the Company has not received any notice of a violation of,
         the Occupational Safety and Health Act of 1970 and the regulations
         promulgated thereunder;

              (x)  the Company is in compliance with all applicable laws
         respecting employment and employment practices, terms and conditions of
         employment, wages, hours of work and occupational safety and health,
         except for non-compliance that does not have, and would not have, a
         material adverse effect on the Company; and (x) to the knowledge of the
         Company, there is no proceeding, claim, suit, action or governmental
         investigation pending or threatened, in respect to which any current or
         former director, officer, employee or agent of the Company is or may be
         entitled to claim indemnification from the Company (A) pursuant to the
         Company Charter Documents (B) as provided in any indemnification
         agreement to which the Company is a party; or (C) pursuant to
         applicable law that has, or would have, a material adverse effect on
         the Company;

              (xi) there are no worker's compensation claims pending or
         threatened against the Company other than claims (A) which are fully
         covered by insurance


                                       19


         or (B) for which adequate accruals have been made in the Company
         Balance Sheet; and

              (xii) set forth in Section 3.1(t)(xii) of the Company Disclosure
         Schedule is a list of all salaried employees and set forth opposite the
         name of each such employee is the annual salary of such employee as of
         the date hereof.

         (u)  Report of Independent Petroleum Engineers. The Company has
furnished Parent with the most recent report of independent petroleum engineers
relating to the Company's oil and gas properties (dated March 31, 2003) and,
since the date thereof, to the knowledge of the Company, there has not been any
material adverse change to the Company's oil and gas properties or the reserve
estimates thereof.

         (v)  Opinion of Financial Advisor. On the date of this Agreement, the
Company has received the written opinion (the "Fairness Opinion") of Energy
Capital Solutions, LLC (the "Company Financial Advisor"), to the effect that, as
of the date of this Agreement, the Merger Consideration is fair to the holders
of Company Shares from a financial point of view, and such opinion has not been
amended, modified, revoked or otherwise withdrawn. Subject to the prior review
and consent by the Company Financial Advisor, the Fairness Opinion shall be
included in the S-4 and the Proxy Statement/Prospectus.

         (w) Insurance. The Company has delivered to Parent an insurance
schedule of the Company's directors' and officers' liability insurance and
primary and excess casualty insurance policies, providing coverage for bodily
injury and property damage to third parties, including products liability and
completed operations coverage, and worker's compensation, in effect as of the
date hereof. The Company maintains insurance coverage reasonably adequate for
the operation of the business of the Company (taking into account the cost and
availability of such insurance), and, to the knowledge of the Company, the
transactions contemplated hereby will not materially adversely affect such
coverage.

         (x) Brokers. No broker, investment banker or other person, other than
the Company Financial Advisor, the fees and expenses of which will be paid by
the Company, is entitled to any broker's, finder's or other similar fee or
commission in connection with the transactions contemplated by this Agreement
based on arrangements made by or on behalf of the Company. The Company
previously has delivered to Parent a true, correct and complete copy of any
engagement or fee agreement between the Company and the Company Financial
Advisor.

         (y) Board Recommendation. The Board of Directors of the Company, at a
meeting duly called and held, has unanimously (i) determined that this Agreement
and the transactions contemplated hereby, including the Merger and the
transactions contemplated thereby, are fair to and in the best interests of the
shareholders of the Company, and (ii) resolved to recommend to the holders of
Company Shares that they approve the Merger Agreement and the transactions
contemplated thereby.

         (z) Required Vote of Company Shareholders; Vote of Directors and
Officers. The affirmative vote of the holders of not less than two-thirds of the
outstanding Company Shares is required for the Company Shareholder Approval. No
other vote of the shareholders of


                                       20


the Company is required by law, the Company Charter Documents or otherwise in
order for the Company to consummate the Merger and the other transactions
contemplated hereby. Each director and officer of the Company who has a right to
vote any Company Shares has represented to the Company his or her present
intention to vote such Company Shares in favor of the Merger, this Agreement and
the transactions contemplated thereby and hereby.

         3.2      REPRESENTATIONS AND WARRANTIES OF PARENT AND SUB. Parent and
Sub represent and warrant to the Company as follows:

                  (a) Organization; Standing and Power. Parent is a corporation
duly organized, validly existing and in good standing under laws of its
jurisdiction of incorporation. Sub is a limited liability company duly
organized, validly existing and in good standing under the laws of its
jurisdiction of organization. Parent and Sub have the requisite corporate or
other power and authority to carry on their business as now being conducted.
Parent and Sub are duly qualified to do business and in good standing in each
jurisdiction in which the nature of their business or the ownership or leasing
of their properties makes such qualification necessary, other than in such
jurisdictions where the failure to be so qualified to do business (individually
or in the aggregate) would not have or would not reasonably be likely to have a
material adverse effect on Parent.

                  (b)      Capital Structure.

                           (i) As of the date hereof, the authorized capital
                  stock of Parent consists of 200,000,000 shares of Parent
                  Common Stock and 1,000,000 shares of preferred stock, par
                  value $0.01 per share (the "Parent Preferred Stock"), 100,000
                  of which have been designated as Series A Participating
                  Preferred Stock. At the close of business on May 23, 2003, (A)
                  80,471,594 shares of Parent Common Stock were issued and
                  outstanding and no shares of Parent Preferred Stock were
                  issued or outstanding; (B) 6,652,659 shares of Parent Common
                  Stock were reserved for issuance by Parent pursuant to options
                  or stock awards granted under Parent's stock plans, (C)
                  2,258,936 shares of Parent Common Stock were reserved for
                  issuance pursuant to options or stock awards not yet granted
                  under the Parent's stock plans, (D) 325,000 shares of Parent
                  Common Stock were reserved for issuance pursuant to
                  outstanding warrants, and (E) 1,506,548 shares of Parent
                  Common Stock were held by Parent in its treasury. Parent has
                  no outstanding SARs. The Parent Common Stock is listed on the
                  Nasdaq National Market. Except as set forth above, no shares
                  of capital stock or other equity or voting securities of
                  Parent are reserved for issuance or are outstanding. All
                  outstanding shares of capital stock of Parent are, and all
                  such shares of the Parent Common Stock issuable upon the
                  exercise of stock options, stock awards or warrants will be
                  when issued thereunder, validly issued, fully paid and
                  nonassessable and not subject to preemptive rights. No capital
                  stock has been issued by Parent since the Parent Balance Sheet
                  Date (as defined in Section 3.2(d)), other than Parent Common
                  Stock issued pursuant to options outstanding on or prior to
                  such date in accordance with their terms at such date. Except
                  for options described above and warrants described above, as
                  of the date hereof there are no outstanding or authorized
                  securities, options, warrants, calls,


                                       21


                  rights, commitments, preemptive rights, agreements,
                  arrangements or undertakings of any kind to which Parent or
                  any of its subsidiaries is a party, or by which any of them is
                  bound, obligating Parent or any of its subsidiaries to issue,
                  deliver or sell, or cause to be issued, delivered or sold, any
                  shares of capital stock or other equity or voting securities
                  of, or other ownership interests in, Parent or of any of its
                  subsidiaries or obligating Parent or any of its subsidiaries
                  to issue, grant, extend or enter into any such security,
                  option, warrant, call, right, commitment, agreement,
                  arrangement or undertaking. There are not as of the date of
                  this Agreement and there will not be at the Effective Time any
                  shareholder agreements, voting trusts or other agreements or
                  understandings to which Parent is a party or by which it is
                  bound relating to the voting of any shares of the capital
                  stock of Parent.

                           (ii) The shares of Parent Common Stock issued as part
                  of the Merger Consideration will, when issued, be duly
                  authorized, validly issued, fully paid and nonassessable
                  shares of Parent Common Stock, and not subject to any
                  preemptive rights created by statute, the Parent Charter
                  Documents, or any agreement to which Parent is a party or is
                  bound, and will, when issued, be registered under the
                  Securities Act and the Exchange Act and registered or
                  qualified (or exempt from registration and qualification
                  requirements) under all applicable state "Blue Sky" securities
                  laws.

                           (iii) As of the date hereof, all of the issued and
                  outstanding membership interests of Sub are owned by Parent.
                  Sub was formed solely for the purpose of participating in the
                  Merger, has no assets and has conducted no activities to date,
                  other than in connection with the Merger.

                  (c) Authority; Non-contravention. Parent and Sub have the
requisite corporate and other power and authority to enter into this Agreement
and to consummate the transactions contemplated hereby. The execution and
delivery of this Agreement by Parent and Sub and the consummation by Parent and
Sub of the transactions contemplated hereby have been duly authorized by all
necessary corporate or other action on the part of Parent and Sub. This
Agreement has been duly executed and delivered by Parent and Sub and constitutes
a valid and binding obligation of Parent and Sub, enforceable against Parent and
Sub in accordance with its terms, except that (i) such enforcement may be
subject to bankruptcy, insolvency, reorganization, moratorium or other similar
laws or judicial decisions now or hereafter in effect relating to creditors'
rights generally and (ii) the remedy of specific performance and injunctive
relief may be subject to equitable defenses and to the discretion of the court
before which any proceeding therefor may be brought. The execution and delivery
of this Agreement by Parent and Sub do not, and the consummation of the
transactions contemplated hereby and compliance with the provisions hereof will
not, conflict with, or result in any violation of, or default (with or without
notice or lapse of time, or both) under, or give rise to a right of termination,
cancellation or acceleration of or "put" right with respect to any obligation or
to loss of a material benefit under, or result in the creation of any Lien on
any of the properties or assets of Parent or any of its subsidiaries under, any
provision of (i) the Restated Certificate of Incorporation or bylaws of Parent,
each as amended through the date hereof (the "Parent Charter Documents") or any
provision of the comparable organizational documents of its subsidiaries, (ii)
any loan or credit


                                       22


agreement, note, bond, mortgage, indenture, lease or other agreement,
instrument, permit, concession, franchise or license applicable to Parent or Sub
or any of their subsidiaries or their respective properties or assets or (iii)
subject to the governmental filings and other matters referred to in the
following sentence, any judgment, order, decree, statute, law, ordinance, rule
or regulation or arbitration award applicable to Parent or any of its
subsidiaries or their respective properties or assets, other than, in the case
of clause (ii), any such conflicts, violations or defaults, rights or Liens that
individually or in the aggregate would not have, or would not be reasonably
likely to have, a material adverse effect on Parent or Sub and would not, or
would not be reasonably likely to, materially impair the ability of Parent and
Sub to perform their respective obligations hereunder or prevent the
consummation of any of the transactions contemplated hereby. No consent,
approval, order or authorization of, or registration, declaration or filing
with, any Governmental Entity is required by or with respect to Parent or Sub or
any of their subsidiaries in connection with the execution and delivery of this
Agreement by Parent and Sub or the consummation by Parent and Sub of the
transactions contemplated hereby, except for (i) the filing by Parent of a
premerger notification and report form under the HSR Act, (ii) filings in
connection, or in compliance, with the provisions of the Securities Act, (iii)
the filing with the SEC of such reports under Sections 13 of the Exchange Act as
may be required in connection with this Agreement and the transactions
contemplated hereby and (iv) filings in Texas by Sub in connection with the
Merger.

                  (d) Parent SEC Documents. Parent has filed all required
reports, schedules, forms, statements and other documents with the SEC since
January 1, 2000 (such documents, together with all exhibits and schedules
thereto and documents incorporated by reference therein, collectively referred
to herein as the "Parent SEC Documents"). As of their respective dates, the SEC
Documents complied in all material respects with the requirements of the
Securities Act or the Exchange Act, as the case may be, and the rules and
regulations of the SEC promulgated thereunder applicable to the Parent SEC
Documents, and none of the Parent SEC Documents contained any untrue statement
of a material fact or omitted to state a material fact required to be stated
therein or necessary in order to make the statements therein, in light of the
circumstances under which they were made, not misleading. Parent's disclosure
controls and procedures (as defined in Sections 13a-14(c) and 15d-14(c) of the
Exchange Act) effectively enable Parent to comply with, and the appropriate
officers of Parent to make all certifications required under, the Sarbanes-Oxley
Act. The consolidated financial statements of Parent included in the Parent SEC
Documents comply in all material respects with applicable accounting
requirements and the published rules and regulations of the SEC with respect
thereto, have been prepared in accordance with generally accepted accounting
principles (except, in the case of unaudited statements, as permitted by Form
10-Q of the SEC) applied on a consistent basis during the periods involved
(except as may be indicated in the notes thereto) and fairly present the
consolidated financial position of Parent and its consolidated subsidiaries as
of the dates thereof and the consolidated results of their operations and cash
flows for the periods then ended (subject, in the case of unaudited statements,
to normal year-end audit adjustments and other adjustments described therein).
There is no liability or obligation of any kind, whether accrued, absolute,
determined, determinable or otherwise, of Parent or any subsidiary of Parent
that is required by generally accepted accounting principles to be reflected or
reserved against or otherwise disclosed in the most recent financial statements
of Parent included in the Parent SEC Documents which is not so reflected or
reserved against that individually or in the aggregate would have a material
adverse effect on Parent. For purposes of this Agreement, "Parent


                                       23


Balance Sheet" means the balance sheet as of March 31, 2003 set forth in
Parent's Quarterly Report on Form 10-Q for the quarter ended March 31, 2003 and
"Parent Balance Sheet Date" means March 31, 2003.

                  (e) Information Supplied. None of the information supplied or
to be supplied by Parent in writing for inclusion or incorporation by reference
in the S-4 will, at the time the S-4 is declared or ordered effective under the
Securities Act, contain any untrue statement of a material fact or omit to state
any material fact required to be stated therein or necessary in order to make
the statements therein, in light of the circumstances under which they are made,
not misleading. The S-4 will comply as a form in all material respects with the
provisions of the Securities Act and the rules and regulations promulgated by
the SEC thereunder. Notwithstanding the foregoing, Parent makes no
representation or warranty with respect to any information supplied by the
Company which is contained in the S-4 or the Proxy Statement/Prospectus.

                  (f) Absence of Material Adverse Change. Since the Parent
Balance Sheet Date, there has been no material adverse change in the business,
assets, operations or condition, financial or otherwise, of Parent and its
subsidiaries, taken as a whole.

                  (g) No Undisclosed Material Liabilities. Since the Parent
Balance Sheet Date, there have been no liabilities or obligations, whether
pursuant to contracts or otherwise, of any kind whatsoever incurred by Parent or
any subsidiary of Parent whether accrued, contingent, absolute, determined,
determinable or otherwise, other than:

                           (i) liabilities or obligations (A) disclosed or
                  provided for in the Parent Balance Sheet or (B) disclosed in
                  the Parent SEC Documents filed with the SEC prior to the date
                  of this Agreement;

                           (ii) liabilities or obligations which, individually
                  and in the aggregate, have not had and are not reasonably
                  likely to have a material adverse effect on Parent; or

                           (iii) liabilities or obligations under this Agreement
                  or incurred in connection with the transactions contemplated
                  hereby.

                  (h) Compliance with Laws; Permits. Parent and its subsidiaries
hold all required, necessary or applicable federal, state, provincial, local or
foreign permits, licenses, variances, exemptions, orders, franchises and
approvals of all Governmental Entities, except where the failure to so hold
would not have a material adverse effect on Parent (the "Parent Permits").
Parent and its subsidiaries are in compliance with the terms of the Parent
Permits except where the failure to so comply would not have a material adverse
effect on Parent. Neither the Parent nor any of its subsidiaries has received
notice of any revocation or modification of any of the Parent Permits, the
revocation or modification of which would have a material adverse effect on
Parent. Neither Parent nor any of its subsidiaries has violated or failed to
comply with any statute, law, ordinance, regulation, rule, permit or order of
any Governmental Entity, or any arbitration award or any judgment, decree or
order of any Governmental Entity, applicable to Parent or any of its
subsidiaries or their respective business, assets or operations,


                                       24


except for violations and failures to comply that could not, individually or in
the aggregate, reasonably be expected to have a material adverse effect on
Parent. To the knowledge of Parent, no investigation or review by any
Governmental Entity with respect to Parent or any of its subsidiaries is pending
or threatened, other than those the outcome of which would not have a material
adverse effect on Parent.

                  (i) Brokers. No broker, investment banker or other person, is
entitled to any broker's, finder's or other similar fee or commission in
connection with the transactions contemplated by this Agreement based upon
arrangements made by or on behalf of Parent or Sub, including any fee for any
opinion rendered by any investment banker.

                  (j) Litigation. There is no suit, action, proceeding or
investigation presently pending or, to the knowledge of Parent, threatened
against or affecting Parent or any of its subsidiaries that could reasonably be
expected to prevent, hinder or materially delay the ability of Parent to
consummate the transactions contemplated by this Agreement, nor is there any
judgment, decree, injunction, rule or order of any Governmental Entity or
arbitrator outstanding against Parent or any of its subsidiaries having, or
which, insofar as reasonably can be foreseen, in the future could have, any such
effect.

                  (k) Financing. Parent and Sub have sufficient funds available
on hand and under existing financing facilities to permit Sub to pay the Cash
Consideration to each holder of Company Shares at the Effective Time.

                  (l) Tax Matters. Parent and Sub each have timely filed all
federal, state, local and other tax returns and reports required to be filed
under applicable law, except as individually or in the aggregate would not have
a material adverse effect on Parent. All such tax returns were true and correct
in all material respects when filed. Parent and Sub each have paid all required
taxes (including any additions to taxes, penalties and interest related thereto)
due and payable on or before the date hereof, except as individually or in the
aggregate would not have a material adverse effect on Parent.

                                    ARTICLE 4

                    COVENANTS RELATING TO CONDUCT OF BUSINESS


         4.1      CONDUCT OF BUSINESS OF THE COMPANY.

                  (a) Ordinary Course. During the period from the date of this
Agreement to the Effective Time (except as otherwise specifically contemplated
by the terms of this Agreement), the Company shall carry on its businesses in
the usual, regular and ordinary course in substantially the same manner as
conducted at the date hereof, which are being undertaken in the ordinary course
of business, and, to the extent consistent therewith, use all reasonable efforts
to preserve intact its current business organizations, keep available the
services of its current officers and employees and preserve its relationships
with customers, suppliers, licensors, licensees, distributors and others having
business dealings with the Company, in each case consistent with past practice,
to the end that their goodwill and ongoing businesses shall be unimpaired to the
fullest extent possible at the Effective Time. Without limiting the generality
of


                                       25


the foregoing, and except as otherwise expressly contemplated by this
Agreement, prior to the Effective Time the Company shall not, without the prior
written consent of Parent and Sub:

                           (i) (A) declare, set aside or pay any dividends on,
                  or make any other distributions in respect of, any of its
                  capital stock, (B) split, combine or reclassify any of its
                  capital stock or issue or authorize the issuance of any other
                  securities in respect of, in lieu of or in substitution for
                  shares of its capital stock or (C) purchase, redeem or
                  otherwise acquire any shares of capital stock of the Company
                  or any other securities thereof or any rights, warrants or
                  options to acquire any such shares or other securities;

                           (ii) issue, deliver, sell, pledge, dispose of or
                  otherwise encumber any of its capital stock or any securities
                  convertible into, or any rights, warrants or options to
                  acquire, any such capital stock (other than the issuance of
                  Company Shares upon the exercise of options outstanding on the
                  date of this Agreement (as identified and described in Section
                  3.1(c)) in accordance with their current terms);

                           (iii) amend the Company Charter Documents;

                           (iv) acquire or agree to acquire (A) by merging or
                  consolidating with, or by purchasing a substantial portion of
                  the stock, or other ownership interests in, or assets of, or
                  by any other manner, any business or any corporation,
                  partnership, association, joint venture, limited liability
                  company or other entity or division thereof or (B) any assets
                  that would be material, individually or in the aggregate, to
                  the Company, except purchases of supplies and inventory in the
                  ordinary course of business consistent with past practice;

                           (v) sell, lease, mortgage, pledge, grant a Lien on or
                  otherwise encumber or dispose of any of its properties or
                  assets, except (A) in the ordinary course of business
                  consistent with past practice and (B) other transactions
                  involving not in excess of $100,000 in the aggregate;

                           (vi) (A) incur any indebtedness for borrowed money or
                  guarantee any such indebtedness of another person, issue or
                  sell any debt securities or warrants or other rights to
                  acquire any debt securities of the Company, guarantee any debt
                  securities of another person, enter into any "keep well" or
                  other agreement to maintain any financial statement condition
                  of another person or enter into any arrangement having the
                  economic effect of any of the foregoing, except for (1)
                  working capital borrowings under revolving credit facilities
                  incurred in the ordinary course of business, (2) borrowings to
                  fund the payments required by Section 5.9 and (3) indebtedness
                  incurred to refund, refinance or replace indebtedness for
                  borrowed money outstanding on the date hereof, or (B) make any
                  loans, advances or capital contributions to, or investments
                  in, any other person, other than employees of the Company in
                  the ordinary course of business consistent with past practice;


                                       26


                           (vii) make or incur any capital expenditure
                  (including expenditures for oil and gas exploration and
                  development), except in the ordinary course of business and,
                  in the case of any single expenditure in excess of $200,000
                  and any expenditures in the aggregate in excess of $500,000,
                  as previously disclosed in writing to Parent;

                           (viii) make any material election relating to Taxes
                  or settle or compromise any material Tax liability;

                           (ix) take any extraordinary action that causes the
                  Company's net operating loss carryforwards to be reduced;

                           (x) pay, discharge or satisfy any claims, liabilities
                  or obligations (absolute, accrued, asserted or unasserted,
                  contingent or otherwise), other than the payment, discharge or
                  satisfaction, in the ordinary course of business consistent
                  with past practice or in accordance with their terms of
                  liabilities reflected or reserved against in, or contemplated
                  by, the Company Balance Sheet;

                           (xi) waive the benefits of, or agree to modify in any
                  manner, any confidentiality, standstill or similar agreement
                  to which the Company is a party;

                           (xii) adopt a plan of complete or partial liquidation
                  or resolutions providing for or authorizing such a liquidation
                  or a dissolution, merger, consolidation, restructuring,
                  recapitalization or reorganization;

                           (xiii) enter into any new collective bargaining
                  agreement;

                           (xiv) change any accounting principle used by it,
                  except as required by regulations promulgated by the SEC or
                  the Financial Accounting Standards Board;

                           (xv) settle or compromise any litigation (whether or
                  not commenced prior to the date of this Agreement) other than
                  settlements or compromises: (A) of litigation where the amount
                  paid in settlement or compromise does not exceed $100,000, or
                  (B) in consultation and cooperation with Parent, and, with
                  respect to any such settlement, with the prior written consent
                  of Parent;

                           (xvi) (A) enter into any new, or amend any existing,
                  severance agreement or arrangement, deferred compensation
                  arrangement or employment agreement with any officer, director
                  or employee, except that, the Company may hire additional
                  employees to the extent deemed by its management to be in the
                  best interests of the Company; provided, that the Company may
                  not enter into any employment or severance agreement or any
                  deferred compensation arrangement with any such additional
                  employees, (B) adopt any new incentive, retirement or welfare
                  benefit arrangements, plans or programs for the benefit of
                  current, former or retired employees or amend any existing
                  Company Benefit Plan (other than amendments required by law or
                  to maintain the tax qualified status of such plans under the
                  Code) or (C) grant any increases in employee compensation,
                  other than


                                       27


                  in the ordinary course or pursuant to promotions, in each case
                  consistent with past practice (which shall include normal
                  individual periodic performance reviews and related
                  compensation and benefit increases and bonus payments
                  consistent with past practices) or (D) grant any stock options
                  or stock awards; or

                           (xvii) authorize any of, or commit or agree to take
                  any of, the foregoing actions.

                  (b) Changes in Employment Arrangements. The Company shall not
adopt or amend (except as may be required by law) any bonus, profit sharing,
compensation, stock option, pension, retirement, deferred compensation,
employment or other employee benefit plan, agreement, trust, fund or other
arrangement (including any Company Benefit Plan) for the benefit of any person,
increase the compensation or fringe benefits of any person, or, except as
provided in an existing Company Benefit Plan or in the ordinary course of
business consistent with past practice, increase the compensation or fringe
benefits of any person or pay any benefit not required by any existing plan,
arrangement or agreement.

                  (c) Other Actions. The Company shall not take any action that
would, or that could reasonably be expected to, result in any of the
representations and warranties of the Company set forth in this Agreement
becoming untrue.

                                    ARTICLE 5

                              ADDITIONAL AGREEMENTS


         5.1      SHAREHOLDER APPROVAL; PREPARATION AND FILING OF THE S-4 AND
PROXY STATEMENT/PROSPECTUS.

                  (a) The Company will, as soon as practicable following the
execution of this Agreement, duly call, give notice of, convene and hold the
Shareholder Meeting for the purpose of approving and adopting this Agreement and
approving related matters. The Company will, through its Board of Directors,
recommend to its shareholders approval of this Agreement, shall not change such
recommendation and shall use its best efforts to obtain approval of this
Agreement and related matters by its shareholders, except to the extent that the
Board of Directors of the Company shall have withdrawn its approval or
recommendation of this Agreement or the Merger as permitted by Section 8.2. The
Company shall use all reasonable efforts to hold the Shareholder Meeting as soon
as practicable after the date upon which the S-4 becomes effective.

                  (b) Promptly after the date hereof, Parent and the Company
shall prepare and the Company shall file with the SEC the Proxy
Statement/Prospectus for use in connection with the solicitation of proxies from
the Company's shareholders in favor of the adoption and approval of this
Agreement and the approval of the Merger at the Shareholder Meeting, and Parent
and the Company shall prepare and Parent shall file with the SEC the S-4 for the
offer and sale of the Parent Common Stock pursuant to the Merger and in which
the Proxy Statement/Prospectus will be included as a prospectus. Each of Parent
and the Company shall provide promptly to the other such information concerning
its business and financial statements


                                       28


and affairs as, in the reasonable judgment of the providing party or its
counsel, may be required or appropriate for inclusion in the Proxy
Statement/Prospectus and the S-4, or in any amendments or supplements thereto,
and to cause its counsel and auditors to cooperate with the other's counsel and
auditors in the preparation of the Proxy Statement/Prospectus and the S-4. Each
of Parent and the Company shall use all commercially reasonable efforts to have
the S-4 declared or ordered effective under the Securities Act as promptly as
practicable after such filing with the SEC. The Company shall use all
commercially reasonable efforts to cause the Proxy Statement/Prospectus to be
mailed to the Company's shareholders as promptly as practicable after the S-4 is
declared or ordered effective under the Securities Act. Parent shall also take
any action (other than qualifying to do business in any jurisdiction in which it
is not now so qualified or to file a general consent to service of process)
required to be taken under any applicable state securities laws in connection
with the issuance of Parent Common Stock in the Merger and the Company shall
furnish all information concerning the Company and the holders of capital stock
of the Company as may be reasonably requested in connection with any such action
and the preparation, filing and distribution of the Proxy Statement/Prospectus.
No filing of, or amendment or supplement to, or correspondence to the SEC or its
staff with respect to, the S-4 will be made by Parent, or with respect to the
Proxy Statement/Prospectus will be made by the Company, without providing the
other party hereto a reasonable opportunity to review and comment thereon.
Parent will advise the Company, promptly after it receives notice thereof, of
the time when the S-4 has become effective or any supplement or amendment has
been filed, the issuance of any stop order, the suspension of the qualification
of the Parent Common Stock issuable in connection with the Merger for offering
or sale in any jurisdiction, or any request by the SEC for amendment of the S-4
or comments thereon and responses thereto or requests by the SEC for additional
information. The Company shall advise Parent, promptly after it receives notice
thereof, of any request by the SEC for the amendment of the Proxy
Statement/Prospectus or comments thereon and responses thereto or requests by
the SEC for additional information. If at any time prior to the Effective Time
any information relating to Parent or the Company, or any of their respective
affiliates, officers or directors, should be discovered by Parent or the Company
which should be set forth in an amendment or supplement to either of the S-4 or
the Proxy Statement/Prospectus, so that any of such documents would not include
any misstatement of a material fact or omit to state any material fact necessary
to make the statements therein, in light of the circumstances under which they
were made, not misleading, the party which discovers such information shall
promptly notify the other party or parties hereto, as applicable, and an
appropriate amendment or supplement to the S-4 and/or the Proxy
Statement/Prospectus describing such information shall be promptly filed with
the SEC and, to the extent required by applicable law, disseminated to the
shareholders of the Company. Each of the parties hereto shall cause the Proxy
Statement/Prospectus to comply as to form and substance to such party in all
material respects with the applicable requirements of the Exchange Act, the
Securities Act and the rules of the Nasdaq National Market.

         5.2      ACCESS TO INFORMATION.

                  (a) During the period from the date hereof to the Effective
Time, except to the extent otherwise required by United States regulatory
considerations:

                           (i) The Company shall, and shall cause each of its
                  officers, employees, counsel, financial advisors and other
                  representatives to, afford to


                                       29


                  Parent, and to Parent's accountants, counsel, financial
                  advisors and other representatives, reasonable access to the
                  Company's properties, books, contracts, commitments and
                  records for the purpose of conducting such inspections and
                  evaluations, including environmental inspections and
                  assessments, as Parent deems appropriate, and, during such
                  period, the Company shall, and shall cause each of its
                  officers, employees, counsel, financial advisors and other
                  representatives to, furnish promptly to Parent,

                                    (A) a copy of each report, schedule,
                           registration statement and other document filed by
                           the Company during such period pursuant to the
                           requirements of federal or state securities laws; and

                                    (B) all other information concerning its
                           business, properties, financial condition, operations
                           and personnel as Parent may from time to time
                           reasonably request so as to afford Parent a
                           reasonable opportunity to make at its sole cost and
                           expense such review, examination and investigation of
                           the Company as Parent may reasonably desire to make.
                           The Company agrees to advise Parent of all material
                           developments with respect to the Company and its
                           assets and liabilities.

                           (ii) The Company agrees to request KPMG LLP to permit
                  Parent's accountants to review and examine the work papers of
                  KPMG LLP with respect to the Company, and the officers of the
                  Company will furnish to Parent such financial and operating
                  data and other information with respect to the business and
                  properties of the Company as Parent shall from time to time
                  reasonably request.

                           (iii) The Company shall notify Parent promptly of any
                  notices from or investigations by Governmental Entities
                  relating to the Company's business or assets or the
                  consummation of the Merger. Parent shall notify the Company
                  promptly of any notices from or investigations by Governmental
                  Entities that could materially affect Parent's consummation of
                  the Merger.

                  (b) Except as required by law, each of the Company and Parent
shall, and shall cause its respective directors, officers, employees,
accountants, counsel, financial advisors and representatives and affiliates to,
(i) hold in confidence, unless compelled to disclose by judicial or
administrative process, or, in the opinion of its counsel, by other requirements
of law, all nonpublic information concerning the other party furnished in
connection with the transactions contemplated by this Agreement until such time
as such information becomes publicly available (otherwise than through the
wrongful act of such person), (ii) not release or disclose such information to
any other person, except in connection with this Agreement to its auditors,
attorneys, financial advisors, other consultants and advisors, and (iii) not use
such information for any competitive or other purpose other than with respect to
its consideration and evaluation of the transactions contemplated by this
Agreement. Any investigation by any party of the assets and business of the
other party and its subsidiaries shall not affect any representations and
warranties hereunder, any conditions to the obligations of either party or
either party's right to terminate this Agreement as provided in Article 7.


                                       30


                  (c) In the event of the termination of this Agreement, each
party promptly will deliver to the other party (and destroy all electronic data
reflecting the same) all documents, work papers and other material (and any
reproductions or extracts thereof and any notes or summaries thereto) obtained
by such party or on its behalf from such other party or its subsidiaries as a
result of this Agreement or in connection therewith so obtained before or after
the execution hereof.

         5.3      REASONABLE EFFORTS; NOTIFICATION.

                  (a) Reasonable Efforts. Upon the terms and subject to the
conditions set forth in this Agreement, except to the extent otherwise required
by United States regulatory considerations and otherwise provided in this
Section 5.3, each of the parties agrees to use commercially reasonable efforts
to take, or cause to be taken, all actions, and to do, or cause to be done, and
to assist and cooperate with the other parties in doing, all things necessary,
proper or advisable to consummate and make effective, in the most expeditious
manner practicable, the Merger, and the other transactions contemplated by this
Agreement, including (i) the obtaining of all necessary actions or nonactions,
waivers, consents and approvals from Governmental Entities and the making of all
necessary registrations and filings (including filings with Governmental
Entities, if any) and the taking of all reasonable steps as may be necessary to
obtain an approval or waiver from, or to avoid an action or proceeding by, any
Governmental Entity, (ii) the obtaining of all necessary consents, approvals or
waivers from third parties, (iii) the defending of any lawsuits or other legal
proceedings, whether judicial or administrative, challenging this Agreement or
the consummation of the transactions contemplated hereby, including seeking to
have any stay or temporary restraining order entered by any court or other
Governmental Entity vacated or reversed and (iv) the execution and delivery of
any additional instruments necessary to consummate the transactions contemplated
by this Agreement; provided, however, that neither of the parties shall be under
any obligation to take any action to the extent that the Board of Directors of
such party shall conclude in good faith, after consultation with and based upon
the written advice of their respective outside legal counsel (which advice in
each case need not constitute an opinion), that such action would cause a breach
of that Board of Directors' fiduciary obligations under applicable law. In
connection with and without limiting the foregoing, each of the Company and
Parent and its respective Board of Directors shall (i) take all action necessary
to ensure that no state takeover statute or similar statute or regulation is or
becomes applicable to the Merger, (ii) if any state takeover statute or similar
statute or regulation becomes applicable to the Merger, take all action
necessary to ensure that the Merger may be consummated as promptly as
practicable on the terms contemplated by this Agreement and otherwise to
minimize the effect of such statute or regulation on the Merger and (iii)
cooperate with each other in the arrangements for refinancing any indebtedness
of, or obtaining any necessary new financing for, the Company and the Surviving
Company.

                  (b) Notification. The Company shall give prompt notice to
Parent, and Parent or Sub shall give prompt notice to the Company, of (i) any
representation or warranty made by it contained in this Agreement becoming
untrue or inaccurate in any respect or (ii) the failure by it to comply with or
satisfy in any material respect any covenant, condition or agreement to be
complied with or satisfied by it under this Agreement; provided, however, that
no such notification shall affect the representations or warranties or covenants
or agreements of the parties or the conditions to the obligations of the parties
hereunder.


                                       31


                  (c) (i) Each of the parties hereto shall file a premerger
notification and report form under the HSR Act with respect to the Merger as
promptly as reasonably possible following execution and delivery of this
Agreement. Each of the parties agrees to use commercially reasonable efforts to
promptly respond to any request for additional information pursuant to Section
(e)(1) of the HSR Act.

                           (ii) The Company will furnish to Fulbright & Jaworski
                  L.L.P., counsel to Parent and Sub, copies of all
                  correspondence, filings or communications (or memoranda
                  setting forth the substance thereof (collectively, "Company
                  Regulatory Documents")) between the Company, or any of its
                  respective representatives, on the one hand, and any
                  Governmental Entity, or members of the staff of such agency or
                  authority, on the other hand, with respect to this Agreement
                  or the Merger; provided, however, that (A) with respect to
                  documents and other materials filed by or on behalf of the
                  Company with the Antitrust Division of the United States
                  Department of Justice, the United States Federal Trade
                  Commission, or any state attorneys general that are available
                  for review by Parent and Sub, copies will not be required to
                  be provided to Fulbright & Jaworski L.L.P. and (B) with
                  respect to any Company Regulatory Documents (1) that contain
                  any information which, in the reasonable judgment of Haynes
                  and Boone, LLP, should not be furnished to Parent or Sub
                  because of antitrust considerations or (2) relating to a
                  request for additional information pursuant to Section (e)(1)
                  of the HSR Act, the obligation of the Company to furnish any
                  such Company Regulatory Documents to Fulbright & Jaworski
                  L.L.P. shall be satisfied by the delivery of such Company
                  Regulatory Documents on a confidential basis to Fulbright &
                  Jaworski L.L.P. pursuant to a confidentiality agreement in
                  form and substance reasonably satisfactory to Parent. Except
                  as otherwise required by United States regulatory
                  considerations, Parent and Sub will furnish to Haynes and
                  Boone, LLP, counsel to the Company, copies of all
                  correspondence, filings or communications (or memoranda
                  setting forth the substance thereof (collectively, "Parent
                  Regulatory Documents")) between Parent, Sub or any of their
                  respective representatives, on the one hand, and any
                  Governmental Entity, or member of the staff of such agency or
                  authority, on the other hand, with respect to this Agreement
                  or the Merger; provided, however, that (A) with respect to
                  documents and other materials filed by or on behalf of Parent
                  or Sub with the Antitrust Division of the United States
                  Department of Justice, the United States Federal Trade
                  Commission, or any state attorneys general that are available
                  for review by the Company, copies will not be required to be
                  provided to Haynes and Boone, LLP, and (B) with respect to any
                  Parent Regulatory Documents (1) that contain information
                  which, in the reasonable judgment of Fulbright & Jaworski
                  L.L.P., should not be furnished to the Company because of
                  antitrust considerations or (2) relating to a request for
                  additional information pursuant to Section (e)(1) of the HSR
                  Act, the obligation of Parent and Sub to furnish any such
                  Parent Regulatory Documents to Haynes and Boone, LLP shall be
                  satisfied by the delivery of such Parent Regulatory Documents
                  on a confidential basis to Haynes and Boone, LLP pursuant to a
                  confidentiality agreement in form and substance reasonably
                  satisfactory to the Company.


                                       32


                           (iii) At the election of Parent, the Company and
                  Parent shall use reasonable efforts to defend all litigation
                  under the federal or state antitrust laws of the United States
                  which if adversely determined would, in the reasonable opinion
                  of Parent (based on the advice of outside counsel), be likely
                  to result in the failure of the condition set forth in Section
                  6.1(c) not being satisfied, and to appeal any order, judgment
                  or decree, which if not reversed, would result in the failure
                  of such condition. Notwithstanding the foregoing, nothing
                  contained in this Agreement shall be construed so as to
                  require Parent, Sub or the Company, or any of their respective
                  subsidiaries or affiliates, to sell, license, dispose of, or
                  hold separate, or to operate in any specified manner, any
                  assets or businesses of Parent, Sub, the Company or the
                  Surviving Company (or to require Parent, Sub, the Company or
                  any of their respective subsidiaries or affiliates to agree to
                  any of the foregoing). The obligations of each party under
                  Section 5.3(a) to use commercially reasonable efforts with
                  respect to antitrust matters shall be limited to compliance
                  with the reporting provisions of the HSR Act and with its
                  obligations under this Section 5.3(c).

         5.4      INDEMNIFICATION.

                  (a) From and after the Effective Time, Parent and the
Surviving Company shall, indemnify, defend and hold harmless each person who is
now, or has been at any time prior to the date hereof or who becomes prior to
the Effective Time, an officer or director of the Company or an officer,
director or employee of the Company who acts as a fiduciary under any Company
Benefit Plans (but, with respect to such persons, only to the extent, if any,
indemnified by the Company as of the date hereof) (the "Indemnified Parties")
against all losses, claims, damages, costs, expenses (including attorneys'
fees), liabilities or judgments or amounts that are paid in settlement with the
approval of the indemnifying party (which approval shall not be unreasonably
withheld) of or in connection with any threatened or actual claim, action, suit,
proceeding or investigation based in whole or in part on or arising in whole or
in part out of the fact that such person is or was a director, officer or such
employee of the Company whether pertaining to any matter existing or occurring
at or prior to the Effective Time and whether asserted or claimed prior to, or
at or after, the Effective Time (including arising out of or relating to the
Merger, the consummation of the transactions contemplated herein, and any action
taken in connection therewith). Parent and Surviving Company shall advance
promptly reasonable litigation expenses incurred by such Indemnified Parties in
connection with investigating, preparing and defending any action arising out of
such acts or omissions; provided the Indemnified Parties provide the Surviving
Company with the written affirmation and written understanding provided in
Section 2.02-1.K. of the TBCA. Any Indemnified Party wishing to claim
indemnification under this Section 5.4, upon learning of any such claim, action,
suit, proceeding or investigation, promptly shall notify the Company (or after
the Effective Time, Parent and the Surviving Company), but the failure so to
notify shall not relieve a party from any liability that it may have under this
Section 5.4, except to the extent such failure materially prejudices such party.
Parent or the Surviving Company shall have the right to assume the defense
thereof. If Parent or the Surviving Company does not assume the defense, the
Indemnified Parties as a group may retain only one law firm to represent them
with respect to each such matter unless there is, under applicable standards of
professional conduct, a conflict between the positions of any two or more
Indemnified Parties. The Indemnified Party shall


                                       33


cooperate in the defense of any such matter. Parent shall not be liable for any
settlement effected without Parent's prior written consent.

                  (b) Parent shall use commercially reasonable efforts to
purchase and maintain in effect for the benefit of the Indemnified Parties for a
period of six years after the Effective Time, directors' and officers' liability
insurance of at least the same coverage and amounts containing terms and
conditions that are no less advantageous in any material respect to the
Indemnified Parties than that maintained by the Company as of the date of this
Merger Agreement with respect to matters arising before the Effective Time,
provided that Parent shall not be required to pay an annual premium for such
insurance in excess of two times the last annual premium paid by the Company
prior to the date hereof (which the Company represents and warrants to have been
$137,500 in the aggregate), but in such case shall purchase as much coverage as
possible for such amount.

                  (c) All rights to indemnification for acts or omissions
occurring prior to the Effective Time now existing in favor of the Indemnified
Parties as provided in the Company Charter Documents and in any indemnification
agreements to which they are parties shall survive the Merger, and the Surviving
Company shall continue such indemnification rights for acts or omissions prior
to the Effective Time in full force and effect in accordance with their terms
and Parent shall be financially responsible therefor.

                  (d) If the Surviving Company or any of its successors or
assigns (i) consolidates with or merges into any other person and shall not be
the continuing or Surviving Company or entity of such consolidation or merger or
(ii) transfers all or substantially all of its properties and assets to any
person, then and in each such case, proper provisions shall be made, and Parent
shall cause them to be so made, so that the successors and assigns of the
Surviving Company, which, in the reasonable opinion of the Surviving Company,
shall be financially responsible persons or entities, assume the obligations set
forth in this Section 5.4.

                  (e) The provisions of this Section 5.4 are intended to be for
the benefit of, and shall be enforceable by, the parties hereto and each
Indemnified Party, his or her heirs and representatives.

         5.5 LETTER OF THE COMPANY'S ACCOUNTANTS. The Company shall use
commercially reasonable efforts to cause to be delivered to Parent and Sub a
letter of KPMG LLP, the Company's independent public accountants, dated a date
within two business days before the date on which the Registration Statement
shall become effective and addressed to Parent and Sub and customary in scope
and substance for letters delivered by independent public accountants in
connection with registration statements similar to the Registration Statement.

         5.6 REPORT OF INDEPENDENT PETROLEUM ENGINEERS. The Company shall use
commercially reasonable efforts to (a) include in the S-4 a report of Joe C.
Neal & Associates, independent petroleum engineers, customary in scope and
substance for reports of independent petroleum engineers, regarding the
Company's oil and gas properties and (b) cause such independent engineers to be
named as experts in, and provide the necessary consent to be included as an
exhibit to, the S-4.


                                       34


         5.7 LETTER OF PARENT'S ACCOUNTANTS. Parent shall use commercially
reasonable efforts to cause to be delivered to the Company a letter of
PricewaterhouseCoopers LLP, Parent's independent public accountants, dated a
date within two business days before the date on which the Registration
Statement shall become effective and addressed to the Company and customary in
scope and substance for letters delivered by independent public accountants in
connection with registration statements similar to the Registration Statement.

         5.8 FEES AND EXPENSES. Except as provided in ARTICLE 8, all fees and
expenses incurred in connection with the Merger, this Agreement and the
transactions contemplated hereby shall be paid by the party incurring such fees
or expenses, whether or not the Merger is consummated; provided, however, that
all fees and expenses incurred in connection with the filings and related
matters under the HSR Act shall be borne equally by Parent and the Company.

         5.9 COMPANY STOCK OPTIONS. After approval of the Merger Agreement by
the shareholders of the Company but before consummation of the Merger, the
Company shall have cancelled or otherwise terminated all outstanding options to
purchase Company Shares granted pursuant to the Company's Stock Plans, including
such options as have not yet vested, by paying to the holders of such options in
consideration of the cancellation or termination thereof an amount in cash for
each Company Share subject to the option equal to the difference between $20.20
and the exercise price per Company Share under the option. The Company shall
withhold from such payment and pay over to the appropriate taxing authorities
all amounts the Company is required to withhold under federal and, if
applicable, state tax laws. As soon as practicable after the date hereof, the
Board of Directors of the Company and the Committee of the Board of Directors of
the Company administering the Company's Stock Plans shall take all action
necessary to accomplish the foregoing.

         5.10 PUBLIC ANNOUNCEMENTS. Parent and Sub, on the one hand, and the
Company, on the other hand, will consult with each other before issuing any
press release or otherwise making any public statements with respect to the
transactions contemplated by this Agreement and shall not issue any such press
release or make any such public statement prior to such consultation, except
that each party may respond to questions from shareholders, respond to inquiries
from financial analysts and media representatives in a manner consistent with
its past practice and make such disclosure as may be required by applicable law
or by obligations pursuant to any listing agreement with the Nasdaq National
Market without prior consultation to the extent such consultation is not
reasonably practicable. The parties agree that the initial press release or
releases to be issued in connection with the execution of this Agreement shall
be mutually agreed upon prior to the issuance thereof.

         5.11 AGREEMENT TO DEFEND. In the event any claim, action, suit,
investigation or other proceeding by any governmental body or other person or
other legal administrative proceeding is commenced that questions the validity
or legality of the transactions contemplated hereby or seeks damages in
connection therewith, the parties hereto agree to cooperate and use their
reasonable efforts to defend against and respond thereto.

         5.12 NASDAQ NATIONAL MARKET. Parent shall use its reasonable best
efforts to list on the Nasdaq National Market, upon official notice of issuance,
the shares of Parent Common Stock to be issued in connection with the Merger.


                                       35


         5.13 EMPLOYEE BENEFIT PLANS. For purposes of eligibility to participate
in and vesting in benefits under each Parent employee benefit plan provided to
the officers and employees of the Company, individuals who are officers and
employees of the Company at the Effective Time who continue as employees of
Parent or Sub, will be immediately eligible to participate in any qualified plan
maintained and sponsored by Parent and will be credited with vesting service for
their years of service with the Company. Parent will take such actions as are
necessary so that each employee of the Company who continues as an employee of
Parent or Sub shall not be subject to preexisting condition exclusions or
waiting periods for welfare benefit plan coverages under any Parent employee
benefit plan. Subject to temporarily retaining one or more of the Company
Benefit Plans to more efficiently transition the Company's employees to Parent
benefit plans, Parent shall provide, or shall cause Sub to provide, compensation
and employee benefits to each employee of the Company who continues as an
employee of Parent or Sub after the Effective Time which are comparable to the
compensation and employee benefits provided to all similarly-situated employees
of Parent or Sub.

         5.14 AGREEMENTS OF OTHERS. The Company shall deliver to Parent, no
later than 20 days after the date of this Agreement, a letter identifying each
person whom the Company reasonably believes is an "affiliate" of the Company for
purposes of Rule 145 under the Securities Act. Thereafter and until the date of
the Shareholder Meeting, the Company shall identify to Parent each additional
person whom the Company reasonably believes to have thereafter become an
"affiliate." The Company shall use its best efforts to cause each person who is
identified as an "affiliate" pursuant to the two immediately preceding sentences
to deliver to Parent, not later that the date 30 days prior to the expected
Effective Time, a written agreement, substantially in the form of Exhibit C to
this Agreement.

                                    ARTICLE 6

                              CONDITIONS PRECEDENT


         6.1 CONDITIONS TO EACH PARTY'S OBLIGATION TO EFFECT THE MERGER. The
respective obligation of each party to effect the Merger is subject to the
satisfaction prior to the Effective Time of the following conditions:

                  (a) Shareholder Approval. Company Shareholder Approval shall
have been obtained upon a vote at a duly held meeting of shareholders of the
Company or at any adjournment thereof.

                  (b) Other Approvals. All authorizations, consents, orders or
approvals of, or declarations or filings with, or terminations or expirations of
waiting periods imposed by, any Governmental Entity necessary for the
consummation of the transactions contemplated by this Agreement (including those
required under the HSR Act) shall have been filed, shall have occurred or shall
have been obtained.

                  (c) No Injunctions or Restraints. No temporary restraining
order, preliminary or permanent injunction or other order issued by any court of
competent jurisdiction or other legal restraint or prohibition preventing the
consummation of the Merger shall be in effect; provided, however, that each of
the parties shall have used reasonable efforts, subject to the


                                       36


limitations set forth in Section 5.3, to prevent the entry of any such
injunction or other order and to appeal as promptly as possible any injunction
or other order that may be entered.

                  (d) Nasdaq National Market Listing. The Parent Common Stock
issuable in the Merger shall have been authorized for listing on the Nasdaq
National Market, upon official notice of issuance.

                  (e) S-4. The S-4 shall have become effective in accordance
with the provisions of the Securities Act. No stop order suspending the
effectiveness of the S-4 shall have been issued by the SEC and remain in effect.
All necessary state securities or "Blue Sky" authorizations shall have been
received.

         6.2 CONDITIONS TO OBLIGATIONS OF PARENT AND SUB. The obligations of
Parent and Sub to effect the Merger are subject to the satisfaction of the
following conditions, any or all of which may be waived in whole or in part by
Parent and Sub:

                  (a) Obligations. Company shall have performed in all material
respects all obligations to be performed by it under this Agreement at or prior
to the Effective Time.

                  (b) Representations and Warranties. Each of the
representations and warranties of the Company contained in this Agreement shall
be true and correct in all material respects (disregarding for these purposes
any materiality qualifications contained therein) when made and as of the
Effective Time as if made on and as of such date; provided, that such
representations and warranties that are by their express provisions made as of a
specific date need be true and correct only as of such specific date.

                  (c) Third Party Consents. All required authorizations,
consents or approvals of any third party, the failure of which to obtain would
have a material adverse effect on the Surviving Company, assuming the Merger had
taken place, shall have been obtained.

                  (d) Material Adverse Change. There shall not have occurred a
material adverse change to the Company.

                  (e) Dissenters' Rights. Dissenting Shares shall not exceed
more than five percent (5%) of the outstanding Company Shares.

                  (f) Legal Opinion. Parent and Sub shall have received an
opinion of counsel to the Company substantially to the effect set forth in
Exhibit A hereto.

                  (g) Tax Opinion. Parent shall have received an opinion,
satisfactory to Parent, dated on or about the date that is two days prior to the
date the Proxy Statement/Prospectus is first mailed to shareholders of the
Company, a copy of which will be furnished to the Company, of Fulbright &
Jaworski L.L.P., to the effect that, if the Merger is consummated in accordance
with the terms of this Agreement, the Merger will be treated for federal income
tax purposes as a reorganization within the meaning of Section 368(a) of the
Code, which opinion will be reaffirmed by Fulbright & Jaworski L.L.P. at the
Closing.


                                       37


                  (h) Certifications. The Company shall have furnished Parent
with a certified copy of a resolution or resolutions duly adopted by the Board
of Directors of the Company approving this Merger Agreement and consummation of
the Merger and the transactions contemplated hereby and directing the submission
of the Merger to a vote of the shareholders of the Company and a certified copy
of a resolution or resolutions duly adopted by the holders of two-thirds of the
outstanding Company Shares approving the Merger Agreement and the transactions
contemplated hereby.

                  (i) Comfort Letter. Parent and Sub shall have received from
KPMG LLP a letter dated such date, in form and substance satisfactory to Parent
and Sub, containing statements and information of the type ordinarily included
in accountants' "comfort letters" with respect to the financial statements and
certain financial information related to the Company contained in the S-4 and
the Proxy Statement/Prospectus.

                  (j) Additional Documents. Parent and Sub shall have been
furnished with such certificates, documents and opinions as they may reasonably
request.

         6.3 CONDITION TO OBLIGATIONS OF THE COMPANY. The obligation of the
Company to effect the Merger is subject to satisfaction of the following
conditions, any or all of which may be waived in whole or in part by the
Company:

                  (a) Obligations. Parent and Sub shall have performed in all
material respects all obligations to be performed by them under this Agreement
at or prior to the Effective Time.

                  (b) Representations and Warranties. Each of the
representations and warranties of Parent and Sub contained in this Agreement
shall be true and correct in all material respects (disregarding for these
purposes any materiality qualifications contained therein) when made and as of
the Effective Time as if made on and as of such date; provided, that such
representations and warranties that are by their express provisions made as of a
specific date need be true and correct only as of such specific date.

                  (c) Material Adverse Change. There shall not have occurred a
material adverse change to the Parent.

                  (d) Legal Opinion. The Company shall have received an opinion
of counsel to Parent and Sub substantially to the effect set forth in Exhibit B
hereto.

                  (e) Tax Opinion. The Company shall have received an opinion,
satisfactory to the Company, dated on or about the date that is two days prior
to the date the Proxy Statement/Prospectus is first mailed to shareholders of
the Company, a copy of which will be furnished to Parent, of Haynes and Boone,
LLP, to the effect that, if the Merger is consummated in accordance with the
terms of this Merger Agreement, the Merger will be treated for federal income
tax purposes as a reorganization within the meaning of Section 368(a) of the
Code, which opinion will be reaffirmed by Haynes and Boone, LLP at the Closing.

                  (f) Comfort Letter. The Company shall have received from
PricewaterhouseCoopers LLP a letter dated such date, in form and substance
satisfactory to the Company, containing statements and information of the type
ordinarily included in accountants'


                                       38


"comfort letters" with respect to the financial statements and certain financial
information related to Parent and Sub contained in the S-4 and Proxy
Statement/Prospectus.

                  (g) Certifications. Parent and Sub shall have furnished the
Company with certified copies of resolutions duly adopted by the respective
boards of directors or duly authorized committees thereof of Parent and Sub
approving this Agreement and the consummation of the Merger and the transactions
contemplated hereby.

                  (h) Additional Documents. The Company shall have been
furnished with such certificates, documents and opinions as it may reasonably
request.

                                    ARTICLE 7

                        TERMINATION, AMENDMENT AND WAIVER
         7.1 TERMINATION. This Agreement may be terminated and the Merger may be
abandoned at any time prior to the Effective Time, whether before or after
approval of matters presented in connection with the Merger by the shareholders
of the Company:

                  (a) by mutual written consent of Parent and the Company, or by
mutual action of their respective Boards of Directors;

                  (b) by either Parent or the Company:

                           (i) if Company Shareholder Approval shall not have
                  been obtained upon a vote at a duly held at the Shareholder
                  Meeting or at any adjournment thereof;

                           (ii) if the Merger shall not have been consummated on
                  or before December 31, 2003, unless the failure to consummate
                  the Merger is the result of a material breach of this
                  Agreement by the party seeking to terminate this Agreement;
                  provided, however, that the passage of such period shall be
                  tolled for any part thereof during which any party shall be
                  subject to a non-final order, decree or ruling or action
                  restraining, enjoining or otherwise prohibiting the
                  consummation of the Merger or the calling or holding of a
                  meeting of the shareholders of the Company called to approve
                  the Merger and the other matters contemplated hereby; or

                           (iii) if any court of competent jurisdiction or any
                  governmental, administrative or regulatory authority, agency
                  or body shall have issued an order, decree or ruling or shall
                  have taken any other action permanently enjoining, restraining
                  or otherwise prohibiting the purchase of Company Shares
                  pursuant to the Merger and such order, decree, ruling or other
                  action shall have become final and nonappealable;

                  (c) by the Company in accordance with the provisions of
Section 8.2;


                                       39


                  (d) by Parent, if (i) for any reason the Company fails to hold
and call the Shareholder meeting by December 31, 2003 or (ii) the Company
breaches any of its representations or warranties herein or fails to perform in
any material respect any of its covenants, agreements or obligations under this
Agreement, which breach or failure (A) would give rise to the failure of a
condition set forth in Section 6.1 or 6.2 and (B) cannot be or has not been
cured within 30 days following receipt of written notice of such breach;

                  (e) by the Company, if Parent or Sub breaches any of its
representations or warranties herein or fails to perform in any material respect
any of its covenants, agreements or obligations under this Agreement, which
breach or failure (i) would give rise to the failure of a condition set forth in
Section 6.1 or 6.3 and (ii) cannot be or has not been cured within 30 days
following receipt of written notice of such breach; or

                  (f) by Parent if (i) the Board of Directors of the Company
shall have withdrawn or modified, in any manner which is adverse to Parent, its
recommendation or approval of the Merger or this Agreement and the transactions
contemplated hereby or shall have resolved to do so, or (ii) the Board of
Directors of the Company shall have recommended to the shareholders of the
Company any Acquisition Proposal or any transaction described in the definition
of Acquisition Proposal, or shall have resolved to do so.

         7.2 PROCEDURE FOR TERMINATION, AMENDMENT, EXTENSION OR WAIVER. A
termination of this Agreement pursuant to Section 7.1, an amendment of this
Agreement pursuant to Section 7.4 or an extension or waiver pursuant to Section
7.5 shall, in order to be effective, require in the case of Parent or the
Company, action by its Board of Directors or the duly authorized designee of its
Board of Directors, and in the case of Sub, action by its managing member.

         7.3 EFFECT OF TERMINATION. In the event of termination of this
Agreement by either the Company or Parent as provided in Section 7.1, this
Agreement shall forthwith become void and have no effect, without any further
liability or obligation on the part of Parent, Sub or the Company, or any
director, officer, employee or shareholder thereof, other than the
confidentiality provisions of Sections 5.2(b) and 5.2(c) and the provisions of
Sections 3.1(x), 3.2(i), 5.8, 7.3, 8.2, 8.3 and Article 9; provided, however,
that any such termination shall not limit or relieve a party's liability or
obligation for damages suffered by the other party hereto as a result of such
party's breach of any representation, warranty or covenant in this Agreement.
Notwithstanding the foregoing, the parties agree that in the event the Company
pays to Parent the fee as provided in Section 8.3, the Company shall have no
further liability or obligation to Parent or Sub for a termination of this
Agreement under Section 7.1(b)(i) or 8.2(b) other than the confidentiality
provisions of Sections 5.2(b) and 5.2(c) and the provisions of Sections 3.1(x),
5.8, 7.3 and Article 9.

         7.4 AMENDMENT. This Agreement may be amended by the parties at any time
before or after Company Shareholder Approval is obtained; provided, however,
that after such Company Shareholder Approval, there shall be made no amendment
that by law requires further approval by such shareholders without the further
approval of such shareholders. This Agreement may not be amended except by an
instrument in writing signed on behalf of each of the parties.


                                       40


         7.5 EXTENSION; WAIVER. At any time prior to the Effective Time, the
parties may, to the extent legally allowed, (a) extend the time for the
performance of any of the obligations or the other acts of the other parties,
(b) waive any inaccuracies in the representations and warranties contained
herein or in any document delivered pursuant hereto or (c) waive compliance with
any of the agreements or conditions contained herein. Any agreement on the part
of a party to any such extension or waiver shall be valid only if set forth in
an instrument in writing signed on behalf of such party. The failure of any
party to this Agreement to assert any of its rights under this Agreement or
otherwise shall not constitute a waiver of such rights.

                                    ARTICLE 8

                    SPECIAL PROVISIONS AS TO CERTAIN MATTERS


         8.1 TAKEOVER DEFENSES OF THE COMPANY. The Company shall take such
action with respect to any anti-takeover provisions in the Company Charter
Documents or afforded it by statute to the extent necessary to consummate the
Merger on the terms set forth in this Agreement.

         8.2      NO SOLICITATION.

                  (a) The Company shall not, and shall not authorize or permit
any officer, director or employee of, or any investment banker, attorney or
other advisor, agent or representative of, the Company ("Company
Representatives") to, and on becoming aware of will take all reasonable actions
to stop such person from continuing to, directly or indirectly, (i) solicit,
initiate or encourage or otherwise intentionally facilitate (including by way of
furnishing information) the making of any Acquisition Proposal (as defined
below), (ii) enter into any agreement (other than confidentiality and standstill
agreements in accordance with the immediately following proviso) with respect to
any Acquisition Proposal, or (iii) participate in any discussions or
negotiations regarding, or furnish to any person any information with respect
to, or take any other action to facilitate any inquiries or the making of any
proposal that constitutes, or may reasonably be expected to lead to, any
Acquisition Proposal; provided, however, that in the case of this clause (iii),
to the extent required by the fiduciary obligations of the Board of Directors of
the Company, determined in good faith by the members thereof, after consultation
with outside legal counsel, the Company may at any time prior to Company
Shareholder Approval (the "Applicable Period"), but not thereafter if the Merger
is approved thereby, and subject to the Company providing written notice to
Parent of its decision to take such action in response and only in response to
an unsolicited written request therefor received without any initiation,
encouragement, discussion or negotiation by the Company or any Company
Representative and other than in contravention of this Section 8.2(a)), (A)
furnish information to any person or "group" (within the meaning of Section
13(d)(3) of the Exchange Act) pursuant to a confidentiality agreement on
substantially the same terms as provided in Section 5.2(b) hereof and otherwise
enter into discussions and negotiations with such person or group as to any
superior proposal (as defined in Section 8.2(c)) such person or group has made
and (B) in the event that the Board of Directors is unable to determine whether
such unsolicited written request is a superior proposal, make inquiry of such
person or group of such information as would enable the Board of Directors to
determine whether or not such request constitutes a


                                       41


superior proposal. Without limiting the foregoing, it is understood that any
violation of the restrictions set forth in the preceding sentence by the Company
or any Company Representative, whether or not such person is purporting to act
on behalf of the Company or otherwise, shall be deemed to be a material breach
of this Agreement by the Company. The Company immediately shall cease and shall
cause to be terminated any existing solicitation, initiation, encouragement,
activity, discussion or negotiation with any parties conducted prior to the date
hereof by the Company or any Company Representatives with respect to any
Acquisition Proposal existing on the date hereof. The Company promptly will
notify Parent of the pendency of any negotiations respecting, or the receipt of,
any Acquisition Proposal. For purposes of this Agreement, "Acquisition Proposal"
means (i) any proposal, other than a proposal by Parent or any of its
affiliates, for a merger or other business combination involving the Company,
(ii) any proposal or offer, other than a proposal or offer by Parent or any of
its affiliates, to acquire from the Company or any of its affiliates in any
manner, directly or indirectly, an equity interest in the Company, any voting
securities of the Company or a material amount of the assets of the Company, or
(iii) any proposal or offer, other than a proposal or offer by Parent or any of
its affiliates, to acquire from the shareholders of the Company by tender offer,
exchange offer or otherwise more than 20% of the outstanding Company Shares.

                  (b) Neither the Board of Directors of the Company nor any
committee thereof shall, except in connection with the termination of this
Agreement pursuant to Sections 7.1(a), 7.1(b), 7.1(c) or 7.1(e), (i) withdraw or
modify, or propose to withdraw or modify, in a manner adverse to Parent or Sub,
the approval or recommendation by the Board of Directors of the Company or any
such committee of this Agreement or the Merger or take any action having such
effect or (ii) approve or recommend, or propose to approve or recommend, any
Acquisition Proposal. Notwithstanding the foregoing, in the event the Board of
Directors of the Company receives an Acquisition Proposal that, in the exercise
of its fiduciary obligations (as determined in good faith by a majority of the
disinterested members thereof after consultation with outside legal counsel), it
determines to be a superior proposal, the Board of Directors may withdraw or
modify its approval or recommendation of this Agreement or the Merger and may
(subject to the following sentence) terminate this Agreement, in each case at
any time after midnight on the third business day following Parent's receipt of
written notice (a "Notice of Superior Proposal") advising Parent that the Board
of Directors has received an Acquisition Proposal which it has determined to be
a superior proposal, specifying the material terms and conditions of such
superior proposal (including the proposed financing for such proposal and a copy
of any documents conveying such proposal) and identifying the party making such
superior proposal. Parent shall have the right, prior to the expiration of the
third business day following its receipt of a Notice of Superior Proposal to
agree to amend the terms of this Agreement such that they are no less favorable
than the terms of such superior proposal. The Company may terminate this
Agreement pursuant to the second sentence of this Section 8.2(b) only if the
shareholders of the Company shall not yet have voted on the Merger, and the
Company shall have paid to Parent the fees set forth in Section 8.3. Nothing
contained in this Agreement shall prohibit the Company from taking and
disclosing to its shareholders a position contemplated by Rule 14e-2(a) under
the Exchange Act following Parent's receipt of an Acquisition Proposal.

                  (c) For purposes of this Agreement, a "superior proposal"
means any bona fide Acquisition Proposal to acquire, directly or indirectly, for
consideration consisting of cash, securities or a combination thereof, all of
the Company Shares then outstanding or all or


                                       42


substantially all the assets of the Company, and otherwise on terms which a
majority of the members of the Board of Directors of the Company determines in
its good faith reasonable judgment (after consultation with its financial
advisor) to be more favorable to the Company's shareholders than the Merger and
which it intends to recommend that the shareholders of the Company approve. In
reaching such good faith determination, the Board of Directors of the Company
will give significant consideration to whether an Acquisition Proposal includes
definite financing.

         8.3 FEE AND EXPENSE REIMBURSEMENTS. The Company agrees to pay Parent a
fee in immediately available funds (in recognition of the fees and expenses
incurred to date by Parent in connection with the matters contemplated hereby)
of $3,500,000 promptly upon:

                  (a)      the termination of the Agreement:

                           (i) by Parent or the Company as permitted by Section
                  7.1(b)(i), and, prior to the meeting of the shareholders of
                  the Company convened for the purpose of voting on the Merger,
                  a third party has made a bona fide written Acquisition
                  Proposal that has not been withdrawn; or

                           (ii) by the Company as permitted by Section 8.2(b);
                  or

                  (b) the Board of Directors of the Company taking any of the
actions set forth in clause (i) or (ii) of Section 8.2(b) and the Board of
Directors of the Company has not reinstated its recommendation of this Agreement
or withdrawn its approval or recommendation or both of any such Acquisition
Proposal within two business days of taking such actions.

                                    ARTICLE 9

                               GENERAL PROVISIONS


         9.1 NONSURVIVAL OF REPRESENTATIONS AND WARRANTIES. None of the
representations, warranties, covenants or agreements in this Agreement or in any
instrument delivered pursuant to this Agreement shall survive the Effective
Time. This Section 9.1 shall not limit any covenant or agreement of the parties
which by its terms contemplates performance after the Effective Time.

         9.2 NOTICES. All notices and other communications hereunder shall be in
writing and shall be deemed given if delivered personally or by facsimile or
sent by overnight courier to the parties at the following addresses (or at such
other address for a party as shall be specified by like notice):

                  (a)      if to Parent or Sub, to

                           Patterson-UTI Energy, Inc.
                           4510 Lamesa Highway
                           Snyder, Texas 79549
                           Telephone:       (325) 574-6300
                           Facsimile:       (325) 574-6390


                                       43


                           Confirm:         (325) 574-6300
                           Attention:       Chief Executive Officer

                  with a copy to

                           Fulbright & Jaworski L.L.P.
                           1301 McKinney, Suite 5100
                           Houston, Texas  77010-3095
                           Telephone:       (713) 651-5151
                           Facsimile:       (713) 651-5246
                           Confirm:         (713) 651-5496
                           Attention:       Michael W. Conlon, Esq.

                  (b)      if to the Company, to

                           TMBR/Sharp Drilling, Inc.
                           4607 W. Industrial Blvd.
                           Midland, Texas 79703
                           Telephone:       (915) 699-5050
                           Facsimile:       (915) 699-5085
                           Confirm:         (915) 699-5050
                           Attention:       Jeff Phillips, President

                           with copies to:

                           Lynch, Chappell & Alsup, P.C.
                           The Summit
                           300 Marienfeld, Suite 700
                           Midland, Texas 79701
                           Telephone:       (915) 683-3351
                           Facsimile:       (915) 683-8346
                           Confirm:         (915) 683-3351
                           Attention:       Thomas W. Ortloff

                           and

                           Haynes and Boone, LLP
                           901 Main Street, Suite 3100
                           Dallas, Texas 75202
                           Telephone:       (214) 651-5000
                           Facsimile:       (214) 200-0674
                           Confirm:         (214) 651-5587
                           Attention:       W. Scott Wallace


                                       44


         9.3      DEFINITIONS.  FOR PURPOSES OF THIS AGREEMENT:

                  (a) an "affiliate" of any person means another person that
directly or indirectly, through one or more intermediaries, controls, is
controlled by, or is under common control with, such first person;

                  (b) "knowledge" with respect to (i) the Company means the
knowledge of its officers listed in Schedule II hereto, after due inquiry and
(ii) Parent and Sub means the knowledge of the officers listed in Schedule III
hereto, after due inquiry;

                  (c) "material adverse effect" or "material adverse change"
means, when used in connection with any person, any change or effect (or any
development that, insofar as can reasonably be foreseen, is likely to result in
any change or effect) that is materially adverse to the business, properties,
assets, condition (financial or otherwise) or results of operations of that
person and its subsidiaries, taken as a whole except for such changes or effects
in general economic, capital market, regulatory or political conditions or
changes that affect generally the oil and gas industry and do not
disproportionately affect such person;

                  (d) "person" means an individual, corporation, partnership,
limited liability company, association, trust, unincorporated organization or
other entity; and

                  (e) a "subsidiary" of any person means any corporation,
partnership, association, joint venture, limited liability company or other
entity in which such person owns over 50% of the stock or other equity
interests, the holders of which are generally entitled to vote for the election
of directors or other governing body of such other legal entity.

         9.4 INTERPRETATION. When a reference is made in this Agreement to a
Section, Exhibit or Schedule, such reference shall be to a Section of, or an
Exhibit or Schedule to, this Agreement unless otherwise indicated. The words
"hereof", "herein" and "hereunder" and similar terms refer to this Agreement as
a whole and not to any particular provision of this Agreement, unless the
context otherwise requires. The table of contents and headings contained in this
Agreement are for reference purposes only and shall not affect in any way the
meaning or interpretation of this Agreement. Whenever the words "include",
"includes" or "including" are used in this Agreement, they shall be deemed to be
followed by the words "without limitation".

         9.5 COUNTERPARTS. This Agreement may be executed in one or more
counterparts, all of which shall be considered one and the same agreement and
shall become effective when one or more counterparts have been signed by each of
the parties and delivered to the other parties.

         9.6 ENTIRE AGREEMENT; NO THIRD-PARTY BENEFICIARIES. This Agreement
(including the Exhibits and Schedules hereto and the documents and instruments
referred to herein) (a) constitute the entire agreement and supersede all prior
agreements and understandings, both written and oral, among the parties with
respect to the subject matter hereof and (b) except for the provisions of
Section 5.4, are not intended to confer upon any person other than the parties
any rights or remedies hereunder.


                                       45


         9.7 GOVERNING LAW. This Agreement shall be governed by, and construed
in accordance with, the laws of the State of Texas, regardless of the laws that
might otherwise govern under applicable principles of conflicts of laws thereof.

         9.8 ASSIGNMENT. Neither this Agreement nor any of the rights, interests
or obligations hereunder shall be assigned by any of the parties without the
prior written consent of the other parties, except that Parent or Sub may assign
its rights and obligations under this Agreement to one of its affiliates.
Subject to the preceding sentence, this Agreement will be binding upon, inure to
the benefit of, and be enforceable by, the parties and their respective
successors and assigns.

         9.9 ENFORCEMENT OF THE AGREEMENT. The parties agree that irreparable
damage would occur in the event that any of the provisions of this Agreement
were not performed in accordance with their specific terms or were otherwise
breached. It is accordingly agreed that the parties shall be entitled to an
injunction or injunctions to prevent breaches of this Agreement and to enforce
specifically the terms and provisions hereof in any district court of the United
States located in the States of Texas (Southern District only), this being in
addition to any other remedy to which they are entitled at law or in equity. In
addition, each of the parties hereto (a) consents to submit itself to the
personal jurisdiction of any federal district court sitting in the Southern
District of Texas in the event any dispute between the parties hereto arises out
of this Agreement solely in connection with such a suit between the parties, (b)
agrees that it will not attempt to deny or defeat such personal jurisdiction by
motion or other request for leave from any such court and (c) agrees that it
will not bring any action relating to this Agreement in any court other than
such a federal or state court.

         9.10 PERFORMANCE BY SUB. Parent hereby agrees to cause Sub to comply
with its obligations under this Agreement.

         9.11 SEVERABILITY. In the event any one or more of the provisions
contained in this Agreement should be held invalid, illegal or unenforceable in
any respect, the validity, legality and enforceability of the remaining
provisions contained herein shall not in any way be affected or impaired
thereby. The parties shall endeavor in good-faith negotiations to replace the
invalid, illegal or unenforceable provisions with valid provisions, the economic
effect of which comes as close as possible to that of the invalid, illegal or
unenforceable provisions.


                                       46


         IN WITNESS WHEREOF, Parent, Sub and the Company have caused this
Agreement to be signed by their respective officers thereunto duly authorized,
all as of the date first written above.

                                PATTERSON-UTI ENERGY, INC.


                                By  /s/ John E. Vollmer III
                                   -----------------------------------------
                                   John E. Vollmer III
                                   Senior Vice President - Corporate
                                   Development


                                PATTERSON-UTI ACQUISITION, LLC


                                By /s/ John E. Vollmer III
                                   -----------------------------------------
                                   John E. Vollmer III
                                   Vice President



                                TMBR/SHARP DRILLING, INC.


                                By     /s/ Jeffrey D. Phillips
                                       -------------------------------------
                                Name:  Jeffrey D. Phillips
                                       -------------------------------------
                                Title: President
                                       -------------------------------------


                                       47