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                                                                      EXHIBIT 4d

                             ROWAN COMPANIES, INC.
                          CERTIFICATE OF DESIGNATIONS
              Providing for an Issue of Series III Preferred Stock
             Pursuant to Section 151 of the General Corporation Law
                            of the State of Delaware



         ROWAN COMPANIES, INC., a Delaware corporation (the "Corporation"),
certifies that pursuant to the authority contained in Article Fourth of its
Certificate of Incorporation, and in accordance with the provisions of Section
151 of the General Corporation Law of the State of Delaware, its Board of
Directors has duly adopted, at a meeting held on April 25, 1986, and at
meetings of the 1986 Debenture Plan Committee of the Board of Directors held on
August 25, 1987 and October 21, 1994, the following resolutions creating and
providing for the issuance of a series of shares of Preferred Stock as
hereinafter described, and further providing for the voting powers,
designations, preferences and relative, participating, optional or other rights
thereof, and the qualifications, limitations or restrictions thereof, in
addition to those set forth in said Certificate of Incorporation, all in
accordance with the provisions of Section 151 of the General Corporation Law of
the State of Delaware, and that such resolutions have at all times since
remained in effect and are now in effect, unamended:

         "RESOLVED, that pursuant to Paragraph A of Article Fourth of the
Certificate of Incorporation of the Corporation, as amended (which creates and
authorizes 5,000,000 shares of preferred stock, par value of $1.00 per share,
hereinafter called the "Preferred Stock"), the Board of Directors hereby
establishes and provides for the issue of a series of 10,300 shares of
Preferred Stock, designated as Series III Preferred Stock (the "Series Stock"),
which shares shall be issuable only upon conversion of the Series III Floating
Rate Subordinated Convertible Debentures (the "Related Debentures") of the
Corporation and shall be convertible into shares of common stock, $.125 par
value, of the Corporation (the "Common Stock"), pursuant to the terms and
conditions hereinafter set forth.

         RESOLVED, that the voting powers, preferences and relative,
participating, optional, conversion, and other rights of the shares of the
Series Stock, and the qualifications, limitations or restrictions thereof, in
addition to those set forth in said Article Fourth, are as follows:

              Section 1.  Dividends. The holders of shares of Series Stock
     shall not be entitled to receive cash dividends on such shares.

              Section 2.  Liquidation Preference. (A) Upon the complete
     liquidation, dissolution, or winding-up of the Corporation, whether
     voluntarily or involuntarily, the Series Stock shall be entitled, before
     any distribution is made to the holders of Common Stock and of any other
     capital stock of the Corporation which ranks junior to the Series Stock in
     respect of distributions of 

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     assets on liquidation, dissolution or winding-up of the Corporation, to
     be paid $1.00 per share, and shall not be  entitled to any further
     payment.

              (B)   In case the net assets of the Corporation are insufficient
     to pay all outstanding shares of Series Stock, and any other class of
     stock of the Corporation ranking in parity upon a liquidation,
     dissolution, or winding-up) with the Series Stock ("Parity Stock"), the
     liquidation preferences to which all such shares are entitled, then the
     entire net assets of the Corporation shall be distributed ratably to all
     outstanding shares of the Series Stock and Parity Stock, if any, in
     proportion to the total amounts to which the holders of all such shares
     are entitled upon such liquidation, dissolution, or winding-up.

              (C)   The merger or consolidation of the Corporation into or with
     another corporation or the merger or consolidation of any other
     corporation into or with the Corporation, or the sale, lease or conveyance
     of all or substantially all the assets, property or business of the
     Corporation shall not be deemed to be a liquidation, dissolution, or
     winding-up of the Corporation within the meaning of this Section 2.

              Section 3.  Certain Restrictions. Without the consent of the
     holders of at least two-thirds of the total number of shares of Series
     Stock outstanding, given in person or by proxy, either in writing or by
     vote at a meeting called for the purpose, the Corporation shall not create
     or authorize any additional shares of Series Stock or amend, alter or
     repeal any of the rights, preferences or powers of the holders of Series
     Stock so as to affect adversely any such rights, preferences or powers;
     provided, however, that without the consent of the holders of all
     outstanding shares of Series Stock, the corporation shall not amend the
     Series Stock to adversely affect the Conversion Ratio thereof.

              Section 4.  Conversion. Each share of the Series Stock may be
     converted at any time within thirty days of the issuance thereof, at the
     option of the holder thereof, into shares of Common Stock of the
     Corporation, on the terms and conditions set forth below in this Section
     4:

              (A)   Subject to the provisions for adjustment hereinafter set
     forth, the number of shares of Common Stock which shall be deliverable
     upon conversion of a share of Series Stock shall equal the face value of
     the Related Debenture which was converted into such shares of Series
     Stock, divided by the closing price of the Common Stock on the Trading
     Date prior to the date of sale of such Related Debenture. For the purpose
     of this subparagraph (A) of this Section 4, the terms "closing price" and
     "Trading Date" shall have the meanings attributed to them in subparagraph
     (B)(6) of this Section 4.

              (B)   The number of shares of Common Stock which shall be
     deliverable upon conversion of a share of Series Stock (the "Conversion
     Ratio") shall be adjusted from time to time as follows:

                    (1)   In case the Corporation at any time or from time to
              time following the date of issuance of the Related Debentures



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              which may be converted into shares of Series Stock shall pay or
              make a dividend or other distribution on any class of capital
              stock of the Corporation in Common Stock, the Conversion
              Ratio in effect at the opening of business on the day following
              the date fixed for the determination of stockholders entitled to
              receive such dividend or other distribution shall be increased by
              multiplying such Conversion Ratio by a fraction of which the
              numerator shall be the sum of the number of shares of Common
              Stock outstanding at the close of business on the date fixed for
              such determination and the total number of shares of Common Stock
              constituting such dividend or other distribution, and the
              denominator shall be the total number of shares of Common Stock
              outstanding at the close of business on the date fixed for such
              determination, such increase to become effective immediately
              after the opening of business on the day following the date fixed
              for such determination. For the purposes of this subparagraph
              (B)(1), the number of shares of Common Stock at any time
              outstanding shall not include shares held in the treasury of the
              Corporation but shall include shares issuable in respect of scrip
              certificates issued in lieu of fractions of shares of Common
              Stock. The Corporation will not pay any dividend or make any
              distribution on shares of Common Stock held in the treasury of
              the Company.

                    (2)   In case the Corporation shall issue rights or
              warrants to all holders of its Common Stock entitling them (for
              periods ending within 180 days) to subscribe for or purchase
              shares of Common Stock at a price per share less than the current
              market price per share (determined as provided in subparagraph
              (B)(6) of this Section) of the Common Stock on the date fixed for
              the determination of stockholders entitled to receive such rights
              or warrants, the Conversion Ratio in effect at the opening of
              business on the day following the date fixed for such
              determination shall be increased by multiplying such Conversion
              Ratio by a fraction of which the numerator shall be the number of
              shares of Common Stock outstanding at the close of business on
              the date fixed for such determination plus the number of shares
              of Common Stock so offered for subscription or purchase, and the
              denominator shall be the number of shares of Common Stock
              outstanding at the close of business on the date fixed for such
              determination plus the number of shares of Common Stock which the
              aggregate of the offering price of the total number of shares of
              Common Stock so offered for subscription or purchase would
              purchase at such current market price, such increase to become
              effective immediately after the opening of business on the day
              following the date fixed for such determination. For the purposes
              of this subparagraph (B)(2), the number of shares of 



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              Common Stock at any time outstanding shall not include shares
              held in the treasury of the Corporation but shall include shares
              issuable in respect of scrip certificates issued in lieu of
              fractions of shares of Common Stock. The Corporation will not
              issue any rights or warrants in respect of shares of Common       
              Stock held in the treasury of the Corporation.

                    (3)   In case outstanding shares of Common Stock shall be
              subdivided into a greater number of shares of Common Stock, the
              Conversion Ratio in effect at the opening of business on the day
              following the day upon which such subdivision becomes effective
              shall be proportionately increased, and, conversely, in case
              outstanding shares of Common Stock shall each be combined into a
              smaller number of shares of Common Stock, the Conversion Ratio in
              effect at the opening of business on the day following the day
              upon which such combination becomes effective shall be
              proportionately decreased, such increase or reduction, as the
              case may be, to become effective immediately after the opening of
              business on the day following the day upon which such subdivision
              or combination becomes effective.

                    (4)   In case the Corporation shall, by dividend or
              otherwise, distribute to all holders of its Common Stock
              evidences of its indebtedness or assets (including securities,
              but excluding any rights or warrants referred to in subparagraph
              (B)(2) of this Section, any dividend or distribution paid in cash
              out of the earned surplus of the Company and any dividend or
              distribution referred to in subparagraph (B)(1) of this Section),
              the Conversion Ratio shall be adjusted so that the same shall
              equal that number determined by multiplying the Conversion Ratio
              in effect immediately prior to the close of business on the date
              fixed for the determination of stockholders entitled to receive
              such distribution by a fraction of which the numerator shall be
              the current market price per share (determined as provided in
              subparagraph (B)(6) of this Section) of the Common Stock on the
              date fixed for such determination and the denominator shall be
              such current market price per share of the Common Stock less the
              then fair market value (as determined by the Board of Directors,
              whose determination shall be conclusive and described in a
              resolution of such Board of Directors) of the portion of the
              assets or evidences of indebtedness so distributed applicable to
              one share of Common Stock, such adjustment to become effective
              immediately prior to the opening of business on the day following
              the date fixed the determination of stockholders entitled to
              receive such distribution.



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              (5) The reclassification (including any reclassification upon a
              consolidation or merger in which the Corporation is the
              continuing corporation) of Common Stock into securities including
              other than Common Stock shall be deemed to involve (a) a
              distribution of such securities other than Common Stock to all
              holders of Common Stock (and the effective date of such
              reclassification shall be deemed to be "the date fixed for the
              determination of stockholders entitled to receive such
              distribution" and "the date fixed for such determination" within
              the meaning of subparagraph (B)(4) of this Section), and (b) a
              subdivision or combination, as the case may be, of the number of
              shares of Common Stock outstanding immediately prior to such
              reclassification into the number of shares of Common Stock
              outstanding immediately thereafter (and the effective date of
              such reclassification shall be deemed to be "the day upon which
              such subdivision becomes effective" or "the day upon which such
              combination becomes effective," as the case may be, and "the day
              upon which such subdivision or combination becomes effective"
              within the meaning of subparagraph (B)(3) of this Section).

                    (6)    For the purpose of any computation under
              subparagraphs (B)(2) and (B)(4) of this Section, the current
              market price per share of Common Stock on any date shall be
              deemed to be the average of the daily closing prices for the 15
              consecutive "Trading Days" selected by the Company commencing not
              less than 20 nor more than 30 Trading Days before the day in
              question.  The closing price for each day shall be the last
              reported sales price regular way or, in case no such reported
              sale takes place on such day, the average of the reported closing
              bid and asked prices regular way, in either case on the New York
              Stock Exchange or, if the Common Stock is not listed or admitted
              to trading on such Exchange, on the principal national securities
              exchange on which the Common Stock is listed or admitted to
              trading or, if not listed or admitted to trading on any national
              securities exchange, the average of the closing bid and asked
              prices as furnished by any New York Stock Exchange member firm
              selected from time to time by the Corporation for that purpose.
              The term "Trading Date" shall mean a day on which the principal
              national securities exchange on which shares of the Common Stock
              are listed or admitted to trading is open for the transaction of
              business or, if not listed or admitted to trading on any national
              securities exchange, a Monday, Tuesday, Wednesday, Thursday or
              Friday on which banking institutions in the City of Houston,
              Texas are not authorized or obligated by law or executive order
              to close.


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                    (7)   The Corporation may make such increases in the
              Conversion Ratio, in addition to those required by subparagraphs
              (B)(1), (B)(2), (B)(3) and (B)(4) of this Section, as it
              considers to be advisable in order that any event treated for
              Federal income tax purposes as a dividend of stock or stock
              rights shall not be taxable to the recipients.

                    (8)   No adjustment in the Conversion Ratio shall be
              required unless such adjustment would require an increase or
              decrease of at least one percent in such Conversion Ratio;
              provided, however, that any adjustment which by reason of this
              subparagraph (B)(8) is not required to be made shall be carried
              forward and taken into account in any subsequent adjustment. All
              calculations under this Article shall be made to the nearest
              1/100 of a share.

              (C)   The holder of any shares of the Series Stock may exercise
     his option to convert such shares into shares of Common Stock by
     surrendering for such purpose to the Corporation, at its principal office
     or at such other office or agency maintained by the Corporation for that
     purpose, a certificate or certificates representing the shares of Series
     Stock to be converted accompanied by a written notice stating that such
     holder elects to convert all or a specified whole number of such shares in
     accordance with the provisions of this Section 4. As promptly as
     practicable, and in any event within five business days after the
     surrender of such certificates and the receipt of such notice relating
     thereto, the Corporation shall deliver or cause to be delivered (i)
     certificates representing the number of validly issued, fully paid and
     nonassessable shares of Common Stock of the Corporation to which the
     holder of the Series Stock so converted shall be entitled and (ii) if less
     than the full number of shares of the Series Stock evidenced by the
     surrendered certificate or certificates are being converted, a new
     certificate or certificates, of like tenor, for the number of shares
     evidenced by such surrendered certificate or certificates less the number
     of shares converted. Conversions shall be deemed to have been made at the
     close of business on the date of giving of such notice and of such
     surrender of the certificate or certificates representing the shares of
     the Series Stock to be converted so that the rights of the holder shall
     cease with respect to such surrendered certificates except for the right
     to receive Common Stock of the Corporation in accordance herewith, and the
     converting holder shall be treated for all purposes as having become the
     record holder of such Common Stock of the Corporation at such time.

              (D)   In connection with the conversion of any shares of the
     Series Stock, no fractions of shares or Common Stock shall be issued, but
     the Corporation shall pay a cash adjustment in respect of such fractional
     interest in an amount equal to the market value of such fractional
     interest. In such event, the market value of a share of Common Stock of
     the Corporation shall be the current market price per share (as defined in
     subparagraph (B)(6) of this Section 4) of such shares on the last Trading
     Date on which such shares were 



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     traded immediately preceding the date upon which such shares of Series 
     Stock are deemed to have been converted.

              (E)   The Corporation shall at all times reserve and keep
     available out of its authorized Common Stock the full number of shares of
     Common Stock of the Corporation issuable upon (a) the conversion of all
     outstanding shares of the Series Stock, and (b) the conversion or exercise
     of any other outstanding securities or rights convertible or exercisable
     into Common Stock, including outstanding Related Debentures.

              Section 5.  Adjustments for Certain Corporate Transactions. In
     case of any consolidation of the Corporation with, or merger of the
     Corporation into, any other corporation (other than a consolidation or
     merger in which the Corporation is the continuing corporation and in which
     no change is made in the outstanding Common Stock), or in case of any sale
     or transfer of all or substantially all of the assets of the Corporation,
     the corporation formed by such consolidation or the corporation resulting
     from such merger or the person which shall have acquired such assets, as
     the case may be, shall make adequate provision providing that the holder
     of each share of Series Stock then outstanding shall have the right
     thereafter to convert such Series Stock into the kind and amount of stock
     or other securities and property receivable upon such consolidation,
     merger, sale or transfer by a holder of the number of shares of Common
     Stock into which such Series Stock might have been converted immediately
     prior to such consolidation, merger, sale or transfer.  Adequate provision
     shall also be made to provide for adjustments which, for events subsequent
     to such consolidation, merger, sale or transfer, shall be as nearly
     equivalent as may be practicable to the adjustments provided for in
     Section 4. The above provisions of this Section 5 shall similarly apply to
     successive consolidations, mergers, sales or transfers.

              Section 6.  Reports of Adjustments. Whenever the Conversion Ratio
     is adjusted as provided in Sections 4 and 5, the Corporation shall
     promptly compute such adjustment and promptly mail to each registered
     holder of the Series Stock and the Related Debentures a certificate,
     signed by the chief financial officer of the Corporation, setting forth
     the number of shares of Common Stock into which each share of the Series
     Stock is convertible as a result of such adjustment, a brief statement of
     the facts requiring such adjustment and the computation thereof and when
     such adjustment will become effective.

              Section 7.  Voting. Except as otherwise provided elsewhere in the
     Certificate of Incorporation of the Corporation or required by law, the
     holders of Series Stock shall have no voting power in the election of
     directors or for any other purposes.

              RESOLVED, that, before the Corporation shall issue any shares of
     the Series Stock, a certificate of designations pursuant to Section 151 of
     the General Corporation Law of the State of Delaware shall be made,
     executed, acknowledged, filed and recorded in accordance with the
     provisions of said 


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     Section 151; and the proper officers of the Corporation are hereby
     authorized and directed to do all acts and things which may be necessary
     or proper in their opinion to carry into effect the purposes and intent
     of this and the foregoing resolutions."

         IN WITNESS WHEREOF, said ROWAN COMPANIES, INC. has caused this
Certificate to be duly executed by the Chairman of its Board of Directors, its
President or a Vice President and attested to by its Secretary or Assistant
Secretary and has caused its corporate seal to be affixed hereto, this 30th day
of November, 1994


                                        ROWAN COMPANIES, INC.

                                        By: /s/ E. E. THIELE 
                                            -------------------------------
                                                Senior Vice President
                                                  

[Corporate Seal]

ATTEST:



/s/ MARK H. HAY 
--------------------------------------
    Secretary












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THE STATE OF TEXAS  }  
                    }  
COUNTY OF HARRIS    }  


         Before me, a Notary Public, on this day personally appeared  E. E.
Thiele, known to me to be the person and officer whose name is subscribed to
the foregoing instrument and acknowledged to me that the same was the act of
the said Rowan Companies, Inc., a Delaware corporation, that he has executed
the same as the act of such corporation for the purposes and consideration
therein expressed, and that the facts stated therein are true.

         Given under my hand and seal of office this 30th day of November, 1994



                                                 /s/ MARCIA BRIDGES
                                                 ------------------------------
                                                 Notary Public, in and for
                                                 the State of Texas

My Commission Expires:

            7-18-98             
-------------------------------




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