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                                                                     EXHIBIT 3.3


                         WEATHERFORD INTERNATIONAL, INC.

                           CERTIFICATE OF DESIGNATION

                    SERIES A PREFERRED STOCK, $1.00 PAR VALUE
                             (ONE SHARE AUTHORIZED)

         Pursuant to Section 151(g) of the General Corporation Law of the State
of Delaware and pursuant to authority conferred upon the Board of Directors of
Weatherford International, Inc., a Delaware corporation (the "Company"), by the
provisions of the Company's Amended and Restated Certificate of Incorporation,
as amended, the undersigned hereby certifies on behalf of the Company that the
Board of Directors of the Company adopted the following resolutions at a meeting
thereof duly convened and held on June 9, 2000:

                  RESOLVED, that pursuant to Article 4 of the Company's Amended
         and Restated Certificate of Incorporation, as amended (the "Certificate
         of Incorporation"), which authorizes the Company to issue up to
         3,000,000 shares of preferred stock, $1.00 par value, the Board of
         Directors hereby establishes a new series of preferred stock, with the
         following designation, powers, preferences and rights, and the
         qualifications, limitations or restrictions thereof:

         1.       Designation

         The distinctive serial designation of such series is "Series A
         Preferred Stock" (hereinafter called "Series A"), and the number of
         shares constituting Series A shall be one.

         2.       No Dividend Right

         The holder or holders of Series A shall have no rights as to payment of
         dividends or other distributions in cash, stock or other property.

         3.       No Rights as to Redemption, Conversion, Exchange or Otherwise.

         The Series A shall not be subject to redemption, conversion or exchange
         rights at the option of the holder or holders thereof or be entitled to
         any other rights not expressly set forth herein, nor shall the Company
         have any obligations with respect thereto. The Company may redeem the
         Series A for $1.00 in the event (a) no Exchangeable Shares are
         outstanding, (b) each of the Company and Weatherford Services elect to
         terminate the Voting Agreement, as approved by the holders of the
         Exchangeable Shares in accordance with the provisions of such shares,
         or (c) as permitted pursuant to the terms of the Voting Agreement or
         any amendments or supplements thereto.

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         4.       Limited Voting Rights

                  (a)      Except as expressly provided in paragraph 4(b) of
                           this Certificate of Designation, the holder or
                           holders of the Series A shall be entitled to vote or
                           consent in writing ("vote") only with respect to
                           matters for which the holders of Common Stock are
                           entitled to vote, in each case voting with the
                           holders of the Common Stock and any other outstanding
                           series of Preferred Stock voting with the Common
                           Stock, all voting as a single class, and not voting
                           as a separate class or series. The holder or holders
                           of the outstanding share of Series A shall be
                           entitled to cast or exercise that number of votes as
                           are equal to the number of Exchangeable Shares that
                           are outstanding on any record date set for the voting
                           or written consent of Common Stock. The record date
                           for the holder of the outstanding share of Series A,
                           whether at an annual or special meeting of
                           stockholders or by written consent, shall be the same
                           date as the record date established for the Common
                           Stock.

                  (b)      The holder or holders of the Series A shall in all
                           cases vote with the holders of the Common Stock and
                           any other outstanding series of Preferred Stock
                           voting with the Common Stock, all voting as a single
                           class, and the holder or holders of Series A shall
                           have no right to vote in a class separate from the
                           Common Stock, except in the case, and only in the
                           case, of a vote on a proposed amendment to the
                           Certificate of Incorporation required to be submitted
                           to a vote of the Company's stockholders where such
                           proposed amendment would (i) increase or decrease the
                           par value of the Preferred Stock (in which case the
                           Series A would have one vote per share and would vote
                           with all outstanding shares of Preferred Stock voting
                           together as a single class), or (ii) modify or change
                           the powers, preferences, or special rights of the
                           share of Series A as expressly set forth herein so as
                           to affect them adversely (in which case the Series A
                           would have one vote per share and would vote as a
                           separate class).

                  (c)      The Certificate of Incorporation may be amended from
                           time to time in a manner that would solely modify or
                           change the relative powers, preferences and rights
                           and the qualifications and limitations or
                           restrictions of any issued shares of any series of
                           Preferred Stock other than the Series A then
                           outstanding without the consent or approval of the
                           holder or holders of the Series A. Any such amendment
                           shall be deemed not to have affected the holders of
                           the Common Stock or the Series A adversely.

                  (d)      Subject to paragraph 4(b) of this Certificate of
                           Designation, the holder or holders of the Series A
                           shall vote with the holders of the



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                           Common Stock and any other outstanding series of
                           Preferred Stock voting with the Common Stock, all
                           voting as a single class, in voting on any proposed
                           merger, consolidation or other business combination
                           involving the Company on which the stockholders of
                           the Company are entitled to vote. The holder or
                           holders of the Series A shall not be entitled to any
                           separate class vote on any such transaction and the
                           rights of the Series A shall not be deemed to have
                           been adversely affected thereby notwithstanding the
                           fact that the Company may no longer exist or the fact
                           that the Series A may no longer be outstanding
                           following such transaction.

         5.       Liquidation Rights

         In the event of any complete liquidation, dissolution or winding-up of
         the Company, the Series A shall have a liquidation value of $1.00 per
         share and shall rank junior to all other Preferred Stock and senior to
         all Common Stock as to the distribution of assets of the Company. A
         merger or consolidation of the Company shall not be considered a
         liquidation, dissolution or winding up of the Company.

         6.       No Other Benefits

         The holder or holders of the share of Series A shall not be entitled to
         the benefit of conditions and restrictions upon (a) the creation of
         indebtedness of the Company or any subsidiary, (b) the issuance of any
         additional stock (including additional shares of Series A or of any
         other series) or (c) the payment of dividends or the making of other
         distributions on the purchase, redemption or other acquisition by the
         Company or any subsidiary of any outstanding stock of the Company.

         7.       No Other Rights

         The Series A shall have no other relative rights, powers or preferences
         or any qualifications, limitations or restrictions thereof except as
         expressly and specifically set forth herein.

         8.       Definitions

         For the purposes hereof, the following terms shall have the following
respective meanings:

         "Common Stock" means shares now or hereafter issued of the class of
         Common Stock, $1.00 par value, presently authorized by the Certificate
         of Incorporation and stock of any other class into which such shares
         may hereafter have been reclassified or changed.


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         "Exchangeable Shares" means the Series 1 Exchangeable Shares of
         Weatherford Services.

         "Preferred Stock" means the shares now or hereafter issued of the class
         of Preferred Stock, $1.00 par value, presently authorized by the
         Certificate of Incorporation; and

         "Voting Agreement" means the Voting and Exchange Trust Agreement dated
         August 10, 2000, as amended or supplemented from time to time, between
         the Company, Weatherford Oil Services, Inc. and Montreal Trust Company
         of Canada, and its successors.

         "Weatherford Services" means Weatherford Oil Services, Inc., an
         Alberta, Canada corporation.

                  RESOLVED, that the Secretary or Assistant Secretary of the
         Company is hereby authorized and directed, for and in the name and on
         behalf of the Company, to execute, acknowledge and file, pursuant to
         Section 103 of the General Corporation Law of the State of Delaware, a
         certificate of designations including the foregoing resolution pursuant
         to Section 151(g) of the General Corporation Law of the State of
         Delaware.

         IN WITNESS WHEREOF, the undersigned has executed this certificate this
7th day of August, 2000.

                                             WEATHERFORD INTERNATIONAL, INC.



                                             By:      /s/ Burt M. Martin
                                                 -------------------------------
                                                          Burt M. Martin
                                                        Assistant Secretary


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