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                                                                     EXHIBIT 5.1


                      [VINSON & ELKINS L.L.P. LETTERHEAD]



                                                                     May 8, 2000


Parker Drilling Company
8 East Third Street
Tulsa, Oklahoma  74103

Ladies and Gentlemen:

         We have acted as counsel for Parker Drilling Company, a Delaware
corporation (the "Company"), and its subsidiaries (the "Subsidiary Guarantors")
with respect to certain legal matters in connection with the registration by the
Company under the Securities Act of 1933, as amended (the "Securities Act"), of
the offer and sale (a) by the Company from time to time, pursuant to Rule 415
under the Securities Act, of (i) unsecured debt securities, in one or more
series, consisting of notes, debentures or other evidences of indebtedness (the
"Debt Securities"), (ii) shares of preferred stock, par value $1.00 per share,
of the Company in one or more series (the "Preferred Stock"), which may be
issued in the form of depositary shares evidenced by depositary receipts
("Depositary Shares"), (iii) shares of common stock, par value $.162/3 per
share, of the Company including attached preferred share purchase rights (the
"Common Stock"), and (iv) warrants (the "Warrants") to purchase Common Stock and
(b) by the Subsidiary Guarantors from time to time, pursuant to Rule 415 under
the Securities Act, of guarantees of the obligations of the Company under the
Debt Securities (the "Guarantees"). The aggregate initial offering prices of the
Debt Securities, Preferred Stock, Depositary Shares, Common Stock and Warrants
offered by the Company in all such offerings will not exceed $250,000,000 or, if
applicable, the equivalent thereof in any other currency or currency unit. The
term "Securities" refers collectively to the Debt Securities, Preferred Stock,
Depositary Shares and Common Stock to be offered by the Company and any
Guarantees offered by the Subsidiary Guarantors. The Securities will be offered
in amounts, at prices and on terms to be determined in light of market
conditions at the time of sale and to be set forth in supplements to the
Prospectus contained in the Company's Registration Statement on Form S-3 to
which this opinion is an exhibit.

         Before rendering our opinions hereinafter set forth, we examined such
certificates, instruments and documents, and we reviewed such questions of law,
as we considered appropriate.



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Parker Drilling Company
May 8, 2000
Page 2


         In connection with this opinion, we have assumed: (i) the Registration
Statement, and any amendments thereto (including post-effective amendments),
have become effective; (ii) a Prospectus Supplement will have been prepared and
filed with the Commission describing any Securities offered thereby; (iii) all
Securities will be issued and sold in compliance with applicable federal and
state securities laws and in the manner stated in the Registration Statement and
the applicable Prospectus Supplement; (iv) each Indenture governing the Debt
Securities, each Depositary Agreement relating to the Depositary Shares and each
Warrant Agreement relating to the Warrants will be duly authorized, executed and
delivered by the parties thereto in substantially the form reviewed by us; (v)
each Indenture will have been duly qualified under the Trust Indenture Act of
1939, as amended; (vi) at the time of any offering or sale of any shares of
Common Stock or Preferred Stock, the Company will have the number of shares of
Common Stock or Preferred Stock, as set forth in the Prospectus Supplement
relating to such offering or sale, duly authorized, established (if applicable)
and available for issuance; (vii) a definitive purchase, underwriting or similar
agreement with respect to any Securities offered will have been duly authorized
and validly executed and delivered by the Company and the other parties thereto;
and (viii) Securities issuable upon conversion, exchange or exercise of any
Securities being offered will have been duly authorized, established (if
appropriate) and reserved for issuance upon such conversion, exchange or
exercise.

         In addition, in connection with this opinion, with respect to
Subsidiary Guarantors that have been organized in jurisdictions other than Texas
or Delaware, we have assumed that the laws of such jurisdictions are the same as
the laws of Texas insofar as they are relevant to the Guarantees.

         Based upon the foregoing, we are of the opinion that:

         (i)      When the terms of any Debt Securities and of their issuance
                  and sale have been duly established in conformity with the
                  applicable Indenture so as not to violate any applicable law
                  or result in a default under or breach of any agreement or
                  instrument binding upon the Company and so as to comply with
                  any requirements or restriction imposed by any court or
                  governmental body having jurisdiction over the Company, and
                  the Debt Securities have been duly executed and authenticated
                  in accordance with such Indenture and issued and sold as
                  contemplated in the Registration Statement, such Debt
                  Securities will constitute valid and legally binding
                  obligations of the Company, subject to bankruptcy, insolvency
                  (including, without limitation, all laws relating to
                  fraudulent transfers), reorganization, moratorium and similar
                  laws relating to or affecting creditors' rights generally and
                  to general equitable principles, and any shares of Common
                  Stock issued upon conversion of any such Debt Securities in
                  accordance with the terms of such Indenture will be duly
                  authorized, validly issued, fully paid and nonassessable.



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Parker Drilling Company
May 8, 2000
Page 3


         (ii)     When (a) the board of directors of the applicable Subsidiary
                  Guarantor (or a duly authorized committee thereof) or the
                  other applicable governing body has taken all necessary action
                  to approve the issuance and terms of any Guarantee, (b) the
                  terms of such Guarantee have been duly established in
                  conformity with the applicable Indenture so as not to violate
                  any applicable law or result in a default under or breach of
                  any agreement or instrument binding upon such Subsidiary
                  Guarantor and so as to comply with any requirements or
                  restriction imposed by any court or governmental body having
                  jurisdiction over such Subsidiary Guarantor, and (c) the Debt
                  Securities relating to such Guarantee have been issued and
                  sold as contemplated in the Registration Statement, such
                  Guarantee will constitute a valid and legally binding
                  obligation of such Subsidiary Guarantor, subject to
                  bankruptcy, insolvency (including, without limitation, all
                  laws relating to fraudulent transfers), reorganization,
                  moratorium and similar laws relating to or affecting
                  creditors' rights generally and to general equitable
                  principles.

         (iii)    When (a) the Board of Directors of the Company (or a duly
                  authorized committee thereof) has taken all necessary
                  corporate action to approve the issuance and sale of any
                  shares of Common Stock or of any series of Preferred Stock
                  (and Depositary Shares, if applicable), and (b) such shares
                  have been issued and sold as contemplated in the Registration
                  Statement, all such shares will be duly authorized, validly
                  issued, fully paid and nonassessable.

         (iv)     When the terms of any Warrants and of their issuance and sale
                  have been duly established in conformity with the applicable
                  Warrant Agreement so as not to violate any applicable law or
                  result in a default under or breach of any agreement or
                  instrument binding upon the Company and so as to comply with
                  any requirements or restriction imposed by any court or
                  governmental body having jurisdiction over the Company, and
                  such Warrants have been duly executed and authenticated in
                  accordance with the applicable Warrant Agreement and issued
                  and sold as contemplated in the Registration Statement, such
                  Warrants will constitute valid and legally binding obligations
                  of the Company, subject to bankruptcy, insolvency (including,
                  without limitation, all laws relating to fraudulent
                  transfers), reorganization, moratorium and similar laws
                  relating to or affecting creditors' rights generally and to
                  general equitable principles, and any shares of Common Stock
                  issued upon exercise of any such Warrants in accordance with
                  the terms of the applicable Warrant Agreement will be duly
                  authorized, validly issued, fully paid and nonassessable.

         The foregoing opinions are limited to the laws of the United States of
America and the States of Texas, New York and Delaware.


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Parker Drilling Company
May 8, 2000
Page 4


         We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the use of our name in the Prospectus forming a
part of the Registration Statement under the caption "Legal Matters." In giving
this consent, we do not admit that we are within the category of persons whose
consent is required under Section 7 of the Securities Act and the rules and
regulations thereunder.

                                        Very truly yours,



                                        /s/ VINSON & ELKINS L.L.P.