SCHLUMBERGER LTD /NY/
8-K, 1998-06-26
OIL & GAS FIELD SERVICES, NEC
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<PAGE>
 
================================================================================


                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT


     PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934


     DATE OF REPORT (Date of earliest event reported):      JUNE 18, 1998



                               SCHLUMBERGER N.V.
                             (Schlumberger Limited)
               (Exact name of registrant as specified in charter)


<TABLE> 
<S>                          <C>                       <C> 
  NETHERLANDS ANTILLES              001-04601                      52-0684746
(State of Incorporation)     (Commission File No.)     (I.R.S. Employer Identification No.)


 
 
 42, RUE SAINT-DOMINQUE          277 PARK AVENUE                   PARKSTRAAT
   PARIS, FRANCE 75007      NEW YORK NEW YORK, USA 10172           THE HAGUE
    (33-1) 4062-1000              (212) 350-9400                THE NETHERLANDS
                                                                    2514 JG
                                                                (31-70) 310-5447
</TABLE> 
              (Address, including Zip Code, and Telephone Number,
             Including Area Code, of Principal Executive Offices)


================================================================================
<PAGE>
 
ITEM 5.  OTHER EVENTS.

          On June 18, 1998, Schlumberger Technology Corporation, a Texas
corporation and wholly owned subsidiary of Schlumberger Limited ("STC"),
Schlumberger OFS, Inc., a Delaware corporation and a wholly owned subsidiary of
STC ("Sub"), and Camco International, Inc., a Delaware corporation ("Camco"),
entered into an Agreement and Plan of Merger (the "Merger Agreement") providing
for the merger of Sub with and into Camco, with Camco surviving as a wholly
owned subsidiary of STC (the "Merger").  Pursuant to the Merger Agreement, the
stockholders of Camco will receive 1.18 shares of common stock, par value $.01
per share, of Schlumberger ("Schlumberger Common Stock") for each share of
common stock, par value $.01 per share, of Camco ("Camco Common Stock").  In
addition, outstanding options to acquire shares of Camco Common Stock will be
converted into options to acquire 1.18 times as many shares of Schlumberger
Common Stock at an exercise price per share equal to the old exercise price
divided by 1.18.  Based on the number of shares of Camco Common Stock and
options to acquire Camco Common Stock outstanding on June 8, 1998, approximately
44.8 million shares of Schlumberger Common Stock will be issued in the Merger
and an additional 2.4 million shares of Schlumberger Common Stock will be
reserved for issuance pursuant to outstanding Camco options.

          Closing under the Merger Agreement is conditioned on, among other
things, approval by Camco's stockholders and receipt of all regulatory
approvals, including expiration or termination of the waiting period prescribed
by the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended.  It is
intended that the Merger qualify as a tax-free reorganization for federal income
tax purposes and as a pooling of interests for accounting purposes.

          Under the Merger Agreement, Camco must pay a termination fee of $90
million if (1) Camco receives a superior proposal (as defined in the Merger
Agreement) and elects to terminate the agreement, (2) the Camco Board of
Directors recommends or proposes to recommend an alternate proposal and STC
exercises it right to terminate the agreement, (3) the Camco Board withdraws,
terminates or modifies its recommendation of the agreement in an adverse manner,
STC terminates the agreement and Camco consummates an alternative transaction on
or before September 30, 1999 or (4) there is an alternative proposal
outstanding, the Camco stockholders do not approve the Merger and Camco
consummates an alternative proposal on or before September 30, 1999.

          Pursuant to the Transaction Agreement, Schlumberger Limited agrees to
sell to STC such number of shares of Schlumberger Common Stock as are required
to be delivered to stockholders of Camco under the Merger Agreement and to
register those shares with the Securities and Exchange Commission.

    The description of the terms and provisions of the Merger Agreement in this
report is qualified in its entirety by reference to the Merger Agreement and the
Transaction Agreement that are filed as exhibits hereto and are incorporated
herein by this reference.  A copy of the press release announcing the signing of
the Merger Agreement is filed as Exhibit 99.1 and is incorporated herein by this
reference.

                                     Page 2
<PAGE>
 
ITEM 7.   FINANCIAL STATEMENTS AND EXHIBITS

    (c)         Exhibits.

  2.1  -   Agreement and Plan of Merger among Schlumberger Technology
           Corporation, a Texas corporation, Schlumberger OFS, Inc., a Delaware
           corporation, and Camco International, Inc., a Delaware corporation,
           dated as of June 18, 1998.

  10.1  -  Transaction Agreement between Schlumberger Limited and Camco
           International, Inc., a Delaware corporation, dated as of June 18,
           1998.

  99.1  -  Press Release dated June 19, 1998, announcing the signing of the
           Merger Agreement.

                                     Page 3
<PAGE>
 
                                   SIGNATURES


  Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                      SCHLUMBERGER N.V.
                                      (SCHLUMBERGER LIMITED)



Dated: June 24, 1998                  /s/ David S. Browning
                                      --------------------------------
                                        David S. Browning
                                        Secretary and General Counsel

                                     Page 4
<PAGE>
 
                               INDEX TO EXHIBITS



Number                                   Exhibit
- ------                                   -------

   2.1  Agreement and Plan of Merger among Schlumberger Technology
        Corporation, a Texas corporation, Schlumberger OFS, Inc., a
        Delaware corporation, and Camco International, Inc., a Delaware
        corporation, dated as of June 18, 1998.

  10.1  Transaction Agreement between Schlumberger Limited and Camco
        International, Inc., a Delaware corporation, dated as of June 18, 1998.

  99.1  Press Release dated June 19, 1998, announcing the signing of the
        Merger Agreement.

<PAGE>
 
                                                                     EXHIBIT 2.1

                          AGREEMENT AND PLAN OF MERGER
                                     AMONG
                      SCHLUMBERGER TECHNOLOGY CORPORATION,
                             SCHLUMBERGER OFS, INC.
                                      AND
                            CAMCO INTERNATIONAL INC.
                           DATED AS OF JUNE 18, 1998
<PAGE>
 
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                               Page

                                                     ARTICLE I
                                                    THE MERGER

<S>                                                                                                              <C>
         1.1        The Merger; Effective Time of the Merger......................................................1
         1.2        Closing.......................................................................................2
         1.3        Effects of the Merger.........................................................................2

                                                    ARTICLE II
                                 EFFECT OF THE MERGER ON THE CAPITAL STOCK OF THE
                                CONSTITUENT CORPORATIONS; EXCHANGE OF CERTIFICATES

         2.1        Effect on Capital Stock.......................................................................2
                    (a)    Stock of  Sub..........................................................................2
                    (b)    Cancellation of Treasury Stock and Related Party Stock.................................2
                    (c)    Exchange Ratio for Camco Common Stock..................................................3
                    (d)    Conversion of Stock Options............................................................3
                    (e)    Adjustment of Conversion Number........................................................3
         2.2        Exchange of Certificates......................................................................4
                    (a)    Exchange Agent.........................................................................4
                    (b)    Exchange Procedures....................................................................4
                    (c)    Distributions with Respect to Shares Prior to Exchange of Certificates.................5
                    (d)    No Further Ownership Rights in Camco Common Stock......................................6
                    (e)    No Fractional Shares...................................................................6
                    (f)    Termination of Exchange Fund...........................................................6
                    (g)    No Liability.  ........................................................................7

                                                    ARTICLE III
                                          REPRESENTATIONS AND WARRANTIES

         3.1        Representations and Warranties of Camco.......................................................7
                    (a)    Organization, Standing and Power.......................................................7
                    (b)    Capital Structure......................................................................8
                    (c)    Authority; No Violations; Consents and Approvals.......................................9
                    (d)    SEC Documents.........................................................................11
                    (e)    Information Supplied..................................................................12
                    (f)    Absence of Certain Changes or Events..................................................12
                    (g)    No Undisclosed Material Liabilities...................................................13
                    (h)    No Default............................................................................13
                    (i)    Compliance with Applicable Laws.......................................................13
</TABLE>

                                      -i-
<PAGE>
 
<TABLE>
<S>                                                                                                             <C>
                    (j)    Litigation............................................................................14
                    (k)    Taxes.................................................................................14
                    (l)    Employee Matters; ERISA...............................................................16
                    (m)    Labor Matters.........................................................................18
                    (n)    Intangible Property...................................................................19
                    (o)    Environmental Matters.................................................................20
                    (p)    Opinion of Financial Advisor..........................................................22
                    (q)    State Takeover Statutes; Vote Required................................................22
                    (r)    Accounting Matters....................................................................23
                    (s)    Beneficial Ownership of Schlumberger Common Stock.....................................23
                    (t)    Insurance.............................................................................23
                    (u)    Brokers...............................................................................23
                    (v)    Material Contracts and Agreements.....................................................23
                    (w)    Title to Properties...................................................................23
                    (x)    Amendment to the Camco Rights Agreement...............................................24
         3.2        Representations and Warranties of STC and Sub................................................24
                    (a)    Organization, Standing and Power......................................................24
                    (b)    Capital Structure.....................................................................25
                    (c)    Authority; No Violations, Consents and Approvals......................................25
                    (d)    Litigation............................................................................26
                    (e)    Accounting Matters....................................................................26
                    (f)    Beneficial Ownership of Camco Common Stock............................................27
                    (g)    Transaction Agreement.  ..............................................................27
                    (h)    No Other Consideration for Camco Common Stock.........................................27

                                                    ARTICLE IV
                                COVENANTS RELATING TO CONDUCT OF BUSINESS OF CAMCO

         4.1        Conduct of Business by Camco Pending the Merger..............................................27
                    (a)    Ordinary Course.......................................................................27
                    (b)    Dividends; Changes in Stock...........................................................27
                    (c)    Issuance of Securities................................................................28
                    (d)    Governing Documents...................................................................28
                    (e)    No Acquisitions.......................................................................28
                    (f)    No Dispositions.......................................................................28
                    (g)    No Dissolution, Etc...................................................................29
                    (h)    Certain Employee Matters..............................................................29
                    (i)    Indebtedness; Leases; Capital Expenditures............................................30
                    (j)    Taxes.................................................................................30
                    (k)    Accounting............................................................................30
         4.2        No Solicitation..............................................................................30
         4.3        Pooling of Interests.........................................................................32
</TABLE>

                                      -ii-
<PAGE>
 
                                   ARTICLE V
                             ADDITIONAL AGREEMENTS

<TABLE>
<S>                                                                                                             <C>
         5.1        Access to Information........................................................................33
         5.2        Camco Stockholders Meeting...................................................................33
         5.3        Legal Conditions to Merger...................................................................33
         5.4        Agreements of Others.........................................................................35
         5.5        Stock Options................................................................................35
         5.6        Indemnification; Directors and Officers Insurance............................................36
         5.7        Agreement to Defend..........................................................................37
         5.8        Accounting Matters...........................................................................37
         5.9        Public Announcements.........................................................................37
         5.10       Other Actions................................................................................37
         5.11       Advice of Changes; SEC Filings...............................................................38
         5.12       Reorganization...............................................................................38
         5.13       Delivery of Schlumberger Common Stock........................................................38
         5.14       Employee Matters.............................................................................38
                    (a)    Employment.  .........................................................................38
                    (b)    Benefits Accrued at the Effective Time.  .............................................38
                    (c)    General Agreement as to Employee Benefit Coverage after
                           the Effective Time.  .................................................................39
                    (d)    Specific Agreements as to Employee Benefit Coverage after
                           the Effective Time. ..................................................................40
                    (f)    Retention Bonus Program.  ............................................................43
                    (g)    Collective Bargaining Exception.  ....................................................44
                    (h)    Transferred Employees.................................................................44

                                                    ARTICLE VI
                                               CONDITIONS PRECEDENT

         6.1        Conditions to Each Party's Obligation to Effect the Merger...................................44
                    (a)    Camco Stockholder Approval............................................................44
                    (b)    NYSE Listing..........................................................................44
                    (c)    Other Approvals.......................................................................44
                    (d)    S-4...................................................................................45
                    (e)    No Injunctions or Restraints..........................................................45
                    (f)    Pooling Accounting....................................................................45

         6.2        Conditions of Obligations of STC and Sub.....................................................45
                    (a)    Representations and Warranties........................................................45
                    (b)    Performance of Obligations of Camco...................................................46
                    (c)    Letters from Camco Directors and Executive Officers...................................46
                    (d)    Certifications and Opinion............................................................46
                    (e)    Tax Opinion...........................................................................47
                    (f)    Transaction Agreement.  ..............................................................47
</TABLE>

                                     -iii-
<PAGE>
 
<TABLE>
<S>                                                                                                             <C>
         6.3        Conditions of Obligations of Camco...........................................................47
                    (a)    Representations and Warranties........................................................47
                    (b)    Performance of Obligations of STC and Sub.............................................48
                    (c)    Certifications and Opinion............................................................48



                    (d)    Tax Opinion...........................................................................49
                    (e)    Fairness Opinion......................................................................49
                    (f)    Transaction Agreement.................................................................49

                                                    ARTICLE VII
                                             TERMINATION AND AMENDMENT

         7.1        Termination..................................................................................50
         7.2        Effect of Termination........................................................................51
         7.3        Amendment....................................................................................52
         7.4        Extension; Waiver............................................................................52

                                                   ARTICLE VIII
                                                GENERAL PROVISIONS

         8.1        Payment of Expenses..........................................................................52
         8.2        Nonsurvival of Representations, Warranties and Agreements....................................52
         8.3        Knowledge....................................................................................53
         8.4        Notices......................................................................................53
         8.5        Interpretation...............................................................................54
         8.6        Counterparts.................................................................................54
         8.7        Entire Agreement; No Third-Party Beneficiaries...............................................54
         8.8        Governing Law................................................................................54
         8.9        No Remedy in Certain Circumstances...........................................................54
         8.10       Assignment...................................................................................55
         8.11       Enforcement of the Agreement.................................................................55
</TABLE>

                                      -iv-
<PAGE>
 
                                             GLOSSARY OF DEFINED TERMS
<TABLE>
<CAPTION>

Defined Term                                                                                 Defined in Section
- ------------                                                                                 ------------------
<S>                                                                                           <C>   
Acquisition Proposal......................................................................    4.2(a)
AICPA.....................................................................................    Recitals
Camco.....................................................................................    Preamble
Camco Beneficiary.........................................................................    3.1(l)(i)
Camco Benefit Plans.......................................................................    3.1(l)(i)
Camco Common Stock........................................................................    2.1
Camco Disclosure Letter...................................................................    3.1
Camco ERISA Affiliate.....................................................................    3.1(l)(ii)
Camco Intangible Property.................................................................    3.1(n)
Camco Litigation..........................................................................    3.1(j)
Camco Order...............................................................................    3.1(j)
Camco Permits.............................................................................    3.1(i)
Camco Preferred Stock.....................................................................    3.1(b)
Camco Representatives.....................................................................    4.2
Camco Retirees............................................................................    5.14
Camco Right...............................................................................    3.1(b)
Camco SEC Documents.......................................................................    3.1(d)
Camco Stock Option........................................................................    5.5
Camco Stock Plans.........................................................................    3.1(b)
CERCLA....................................................................................    3.1(o)(A)
Certificate of Merger.....................................................................    1.1
Certificates..............................................................................    2.2(b)
Closing...................................................................................    1.1
Closing Date..............................................................................    1.2
Code......................................................................................    Recitals
Confidentiality Agreements................................................................    5.1
Constituent Corporations..................................................................    1.3(a)
Continuing Employees......................................................................    5.14
Conversion Number.........................................................................    2.1(c)
Current Balance Sheet.....................................................................    3.1(k)
DGCL......................................................................................    1.1
Effective Time............................................................................    1.1
Environmental Law.........................................................................    3.1(o)
ERISA.....................................................................................    3.1(l)(i)
Exchange Act..............................................................................    3.1(c)(iii)
Exchange Agent............................................................................    2.2(a)
Exchange Fund.............................................................................    2.2(a)
FASB......................................................................................    Recitals
Fractional Dividends......................................................................    2.2(e)
GAAP......................................................................................    3.1(d)
</TABLE>

                                      -v-
<PAGE>
 
<TABLE>
<S>                                                                                           <C>        
Governmental Entity.......................................................................    3.1(c)(iii)
Hazardous Material........................................................................    3.1(o)(B)
HSR Act...................................................................................    3.1(c)(iii)
Indemnified Liabilities...................................................................    5.6
Indemnified Parties.......................................................................    5.6
Injunction................................................................................    6.1(e)
IRS.......................................................................................    3.1(k)(ii)
Knowledge.................................................................................    8.3
Material Adverse Effect...................................................................    3.1(a)
Merger....................................................................................    Recitals
Merger Agreement..........................................................................    Preamble
Notice of Superior Proposal...............................................................    4.2(b)
NYSE......................................................................................    3.2(c)(iii)
OSHA......................................................................................    3.1(o)(A)
Pension Benefit Guaranty Corporation......................................................    3.1(l)(iv)
Proxy Statement...........................................................................    3.1(c)(iii)
Release...................................................................................    3.1(o)(C)
Remedial Action...........................................................................    3.1(o)(D)
Returns...................................................................................    3.1(k)(i)
Rights Agreement..........................................................................    3.1(b)
S-4.......................................................................................    3.1(e)
Schlumberger..............................................................................    Recitals
Schlumberger Common Stock.................................................................    2.1(c)
SEC.......................................................................................    Recitals
Securities Act............................................................................    3.1(d)
Significant Subsidiary....................................................................    4.1(g)
STC ......................................................................................    Preamble
STC Affiliated Group......................................................................    2.2(a)
STC Disclosure Letter.....................................................................    3.2
STC Group.................................................................................    5.14
STC Litigation............................................................................    3.2(d)
Superior Proposal ........................................................................    4.2(c)
Surviving Corporation.....................................................................    1.3(a)
Sub.......................................................................................    Preamble
Subsidiary................................................................................    2.1(b)
Taxes.....................................................................................    3.1(k)
Termination Fee...........................................................................    7.2(b)
Transaction Agreement.....................................................................    6.2(f)
Voting Debt...............................................................................    3.1(b)
</TABLE>

                                      -vi-
<PAGE>
 
                          AGREEMENT AND PLAN OF MERGER

          AGREEMENT AND PLAN OF MERGER, dated as of June 18, 1998 (this "Merger
Agreement"), among Schlumberger Technology Corporation, a Texas corporation
("STC"), Schlumberger OFS, Inc., a Delaware corporation and a wholly owned
subsidiary of STC ("Sub"), and Camco International Inc., a Delaware corporation
("Camco").

          WHEREAS, the Boards of Directors of STC, Sub and Camco have each
approved the merger of Sub with and into Camco (the "Merger") upon the terms and
subject to the conditions of this Merger Agreement, thus enabling STC to acquire
all of the stock of Camco solely in exchange for voting stock of Schlumberger
Limited, a Netherlands Antilles corporation and the parent of STC
("Schlumberger");

          WHEREAS, for federal income tax purposes, it is intended that the
Merger shall qualify as a reorganization within the meaning of Section
368(a)(1)(B) of the Internal Revenue Code of 1986, as amended (the "Code");

          WHEREAS, for accounting purposes, it is intended that the Merger shall
be accounted for as a pooling of interests under the requirements of Opinion No.
16, Business Combinations, of the Accounting Principles Board of the American
Institute of Certified Public Accountants (the "AICPA"), as amended by
Statements of Financial Accounting Standards Board (the "FASB"), and the related
interpretations of the AICPA, FASB, the Emerging Issues Task Force, and the
rules and regulations of the U.S. Securities and Exchange Commission (the
"SEC"); and

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

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

                                   ARTICLE I
                                  THE MERGER

     1.1  The Merger; Effective Time of the Merger.  Upon the terms and
conditions of this Merger Agreement and in accordance with the Delaware General
Corporation Law (the "DGCL"), Sub shall be merged with and into Camco at the
Effective Time (as hereinafter defined).  The Merger shall become effective
immediately when a certificate of merger (the "Certificate of Merger"), prepared
and executed in accordance with the relevant provisions of the DGCL is duly
filed with the Secretary of State of the State of Delaware or, if agreed to by
the parties, at such time thereafter as is provided in the Certificate of Merger
(the "Effective Time").  The filing of the Certificate of Merger shall be made
as soon as practicable after the closing of the Merger (the "Closing").

                                      -1-
<PAGE>
 
     1.2  Closing.  The Closing shall take place at 10:00 a.m. on a date to be
specified by the parties, which shall be no later than the second business day
after satisfaction (or waiver in accordance with this Merger Agreement) of the
latest to occur of the conditions set forth in Article VI (the "Closing Date"),
at the offices of Baker & Botts, L.L.P., 910 Louisiana, Houston, Texas, unless
another date or place is agreed to in writing by the parties.

     1.3  Effects of the Merger.

          (a) At the Effective Time: (i) Sub shall be merged with and into
     Camco, the separate existence of Sub shall cease and Camco shall continue
     as the surviving corporation (Sub and Camco are sometimes referred to
     herein as the "Constituent Corporations" and Camco is sometimes referred to
     herein as the "Surviving Corporation") and the merger shall have such
     effects as are set forth in Section 259 of the DGCL; (ii) the Certificate
     of Incorporation of Camco shall be amended to change Camco's authorized
     shares of capital stock to 1,000 shares, par value $.001 per share, of
     common stock, and so amended shall be the Certificate of Incorporation of
     the Surviving Corporation; and (iii) the Bylaws of Camco as in effect
     immediately prior to the Effective Time shall be the Bylaws of the
     Surviving Corporation.

          (b) The directors and officers of Sub at the Effective Time shall,
     from and after the Effective Time, be the directors and officers of the
     Surviving Corporation and shall serve until their successors have been duly
     elected or appointed and qualified or until their earlier death,
     resignation or removal in accordance with the Surviving Corporation's
     Certificate of Incorporation and Bylaws.

                                  ARTICLE II
               EFFECT OF THE MERGER ON THE CAPITAL STOCK OF THE
              CONSTITUENT CORPORATIONS; EXCHANGE OF CERTIFICATES

     2.1  Effect on Capital Stock.  At the Effective Time, by virtue of the
Merger and without any action on the part of the holder of any shares of common
stock, par value $0.01 per share, of Camco ("Camco Common Stock") or capital
stock of Sub:

        (a) Stock of Sub. Each share of common stock, par value $1.00 per share,
            of Sub issued and outstanding immediately prior to the Effective
            Time will be converted into one share of common stock, par value
            $.001 per share, of the Surviving Corporation, and the stock of the
            Surviving Corporation issued on that conversion will constitute all
            of the issued and outstanding shares of capital stock of the
            Surviving Corporation.

        (b) Cancellation of Treasury Stock and Related Party Stock. Each share
            of Camco Common Stock and all other shares of capital stock of Camco
            that are owned by Camco as treasury stock and any shares of Camco
            Common Stock

                                      -2-
<PAGE>
 
            and all other shares of capital stock of Camco owned in any case by
            STC, any entity controlling STC or any wholly owned Subsidiary (as
            hereinafter defined) of such entities or by any wholly owned
            Subsidiary of Camco shall be canceled and retired and shall cease to
            exist and no Schlumberger Common Stock or cash in lieu of fractional
            shares shall be delivered or deliverable in exchange therefor. As
            used in this Merger Agreement, the word "Subsidiary" means, with
            respect to any party, any corporation or other organization, whether
            incorporated or unincorporated, of which: (i) such party or any
            other Subsidiary of such party is a general partner (excluding
            partnerships, the general partnership interests of which are held by
            such party or any Subsidiary of such party that do not have a
            majority of the voting interest in such partnership); or (ii) at
            least a majority of the securities or other interests having by
            their terms ordinary voting power to elect a majority of the Board
            of Directors or others performing similar functions with respect to
            such corporation or other organization is, directly or indirectly,
            owned or controlled by such party or by any one or more of its
            Subsidiaries, or by such party and any one or more of its
            Subsidiaries.

        (c) Exchange Ratio for Camco Common Stock. Subject to the provisions of
            Section 2.2(e) hereof, each share of Camco Common Stock issued and
            outstanding immediately prior to the Effective Time (other than
            shares to be canceled in accordance with Section 2.1(b)) shall, at
            the Effective Time and without the requirement of any action by the
            holder thereof, be exchanged for and converted into 1.18 (the
            "Conversion Number") shares of voting common stock, par value $.01
            per share, of Schlumberger ("Schlumberger Common Stock") to be
            delivered by Sub pursuant to the Merger. All references in this
            Merger Agreement to the Camco Common Stock to be received pursuant
            to the Merger shall be deemed to include the Camco Stock Purchase
            Rights. All such shares of Camco Common Stock, when so exchanged and
            converted, shall no longer be outstanding and shall automatically be
            canceled and retired and shall cease to exist, and each holder of a
            certificate representing any such shares shall cease to have any
            rights with respect thereto, except the right to receive a
            certificate for the shares of Schlumberger Common Stock and cash in
            lieu of fractional shares of Schlumberger Common Stock as
            contemplated by Section 2.2(e), upon the surrender of such
            certificate for shares of Camco Common Stock in accordance with
            Section 2.2, without interest.

        (d) Conversion of Stock Options. Each outstanding Camco Stock Option (as
            defined in Section 5.5) shall be converted as provided in Section
            5.5.

        (e) Adjustment of Conversion Number. If, subsequent to the date of this
            Agreement but prior to the Effective Time, the number of shares of
            Schlumberger Common Stock issued and outstanding is changed as a
            result

                                      -3-
<PAGE>
 
            of a stock split, reverse stock split, stock dividend,
            recapitalization or other similar transaction, the Conversion Number
            and other items dependent thereon shall be appropriately adjusted
            herein.

     2.2  Exchange of Certificates.

          (a)   Exchange Agent. As of the Effective Time, Sub shall deposit with
                Boston EquiServe LP or such other bank or trust company
                designated by STC or another member of the STC Affiliated Group
                (as defined below) and reasonably acceptable to Camco (the
                "Exchange Agent"), for the benefit of the holders of shares of
                Camco Common Stock, for exchange in accordance with this Article
                II, through the Exchange Agent, certificates representing the
                shares of Schlumberger Common Stock (such shares of Schlumberger
                Common Stock, together with any dividends or distributions with
                respect thereto, and any cash deposits by STC in order to make
                payments in lieu of fractional shares or cash generated by sales
                of fractional shares of Schlumberger Common Stock in the open
                market pursuant to Section 2.2(e) being hereinafter collectively
                referred to as the "Exchange Fund") issuable pursuant to Section
                2.1 in exchange for outstanding shares of Camco Common Stock.
                The Exchange Agent shall, pursuant to irrevocable instructions,
                deliver the Schlumberger Common Stock contemplated to be issued
                pursuant to Section 2.1 out of the Exchange Fund. The Exchange
                Fund shall not be used for any other purpose. As used in this
                Merger Agreement, "STC Affiliated Group" means any entity
                controlling STC and any direct or indirect Subsidiary of such
                entity or of STC.

          (b)   Exchange Procedures. As soon as reasonably practicable after the
                Effective Time, the Exchange Agent shall mail to each holder of
                record of a certificate or certificates which, immediately prior
                to the Effective Time, represented outstanding shares of Camco
                Common Stock (the "Certificates") (other than Camco, STC, any
                entity controlling STC or any wholly owned Subsidiaries of any
                such entities): (i) 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 delivery of the
                Certificates to the Exchange Agent, and shall be in such form
                and have such other provisions as STC or a designated member of
                the STC Affiliated Group may reasonably specify); and (ii)
                instructions for use in effecting the surrender of the
                Certificates in exchange for certificates representing shares of
                Schlumberger Common Stock and any cash in lieu of a fractional
                share of Schlumberger Common Stock. Upon surrender of a
                Certificate for cancellation to the Exchange Agent or to such
                other agent or agents as may be appointed by STC or a designated
                member of the STC Affiliated Group and reasonably acceptable to
                Camco, together with such letter of transmittal, duly executed,
                and any other required documents, the holder of such Certificate
                shall be entitled to receive in

                                      -4-
<PAGE>
 
                exchange therefor a certificate representing that number of
                whole shares of Schlumberger Common Stock which such holder has
                the right to receive pursuant to the provisions of this Article
                II and any cash in lieu of fractional shares of Schlumberger
                Common Stock as contemplated by Section 2.2(e), and the
                Certificate so surrendered shall forthwith be canceled. In the
                event of a transfer of ownership of Camco Common Stock which is
                not registered in the transfer records of Camco, a certificate
                representing the appropriate number of shares of Schlumberger
                Common Stock may be issued to a transferee if the Certificate
                representing such Camco Common Stock is presented to the
                Exchange Agent accompanied by all documents required to evidence
                and effect such transfer and by evidence that any applicable
                stock transfer taxes have been paid. Until surrendered as
                contemplated by this Section 2.2, each Certificate shall be
                deemed at any time after the Effective Time to represent only
                the right to receive upon such surrender the certificate
                representing shares of Schlumberger Common Stock and cash in
                lieu of any fractional shares of Schlumberger Common Stock as
                contemplated by this Section 2.2 and all dividends or other
                distributions thereon with a record date after the Effective
                Time as contemplated by Section 2.2(c). The Exchange Agent shall
                not be entitled to vote or exercise any rights of ownership with
                respect to the Schlumberger Common Stock held by it from time to
                time hereunder, except that it shall receive and hold all
                dividends or other distributions paid or distributed with
                respect thereto for the account of persons entitled thereto.

          (c)   Distributions with Respect to Shares Prior to Exchange of
                Certificates. No dividends or other distributions with respect
                to Schlumberger Common Stock declared or made after the
                Effective Time with a record date after the Effective Time shall
                be paid to the holder of any unsurrendered Certificate with
                respect to the Schlumberger Common Stock represented thereby as
                a result of the exchange and conversion provided in Section
                2.1(c), and no cash payment in lieu of fractional shares shall
                be paid to any such holder pursuant to Section 2.2(e) until the
                holder of such Certificate shall surrender such Certificate.
                Subject to the effect of applicable laws, following surrender of
                any such Certificate, there shall be paid to the holder thereof,
                without interest: (i) at the time of such surrender, the amount
                of any cash payable in lieu of a fractional share of
                Schlumberger Common Stock to which such holder is entitled
                pursuant to Section 2.2(e) and the amount of dividends or other
                distributions with a record date after the Effective Time
                theretofore paid with respect to such whole shares of
                Schlumberger Common Stock; and (ii) at the appropriate payment
                date, the amount of dividends or other distributions with a
                record date after the Effective Time but prior to surrender and
                a payment date subsequent to surrender payable with respect to
                such whole shares of Schlumberger Common Stock.

                                      -5-
<PAGE>
 
          (d)   No Further Ownership Rights in Camco Common Stock. All shares of
                Schlumberger Common Stock issued in exchange for and upon the
                conversion of Camco Common Stock in accordance with the terms
                hereof (including any cash paid pursuant to Section 2.2(c) or
                2.2(e)) shall be deemed to have been issued in full satisfaction
                of all rights pertaining to such shares of Camco Common Stock,
                subject, however, to the Surviving Corporation's obligation to
                pay any dividends or make any other distributions with a record
                date prior to the Effective Time that may have been declared or
                made by Camco on such shares of Camco Common Stock in accordance
                with the terms of this Merger Agreement or prior to the date
                hereof and which remain unpaid at the Effective Time, and after
                the Effective Time there shall be no further registration of
                transfers on the stock transfer books of the Surviving
                Corporation of the shares of Camco Common Stock that were
                outstanding immediately prior to the Effective Time. If, after
                the Effective Time, Certificates are presented to the Surviving
                Corporation for any reason, they shall be canceled and exchanged
                as provided in this Article II.

          (e)   No Fractional Shares. No certificates or scrip representing
                fractional shares of Schlumberger Common Stock shall be issued
                pursuant to this Article II, and, except as provided in this
                Section 2.2(e), no dividend or other distribution, stock split
                or interest shall relate to any such fractional security, and
                such fractional interests shall not entitle the owner thereof to
                vote or to any rights of a security holder of Schlumberger. In
                lieu of any fractional security, STC shall pay or cause the
                Exchange Agent to pay, to each holder of shares of Camco Common
                Stock who would otherwise have been entitled to a fraction of a
                share of Schlumberger Common Stock pursuant to this Article II,
                an amount in cash (without interest) equal to such holder's
                proportionate interest in the sum of (i) the fraction of a share
                of Schlumberger Common Stock to which such holder would
                otherwise have been entitled, multiplied by the closing sale
                price per share of Schlumberger Common Stock on the New York
                Stock Exchange on the last trading day immediately preceding the
                date of the Effective Time, and (ii) the aggregate dividends or
                other distributions that are payable with respect to such shares
                of Schlumberger Common Stock pursuant to Section 2.2(c) (such
                dividends and distributions being herein called the "Fractional
                Dividends"). STC shall timely make available to the Exchange
                Agent any cash necessary to make payments in lieu of fractional
                shares as aforesaid. For purposes of determining whether a
                holder of shares of Camco Common Stock is to receive payment in
                lieu of fractional shares, all shares of Camco Common Stock held
                of record by such holder shall be aggregated.

          (f)   Termination of Exchange Fund. Any portion of the Exchange Fund
                that remains undistributed to the former stockholders of Camco
                for one year after the Effective Time shall be delivered to STC
                upon demand, and any

                                      -6-
<PAGE>
 
                stockholders of Camco who have not theretofore complied with
                this Article II shall thereafter look only to STC for payment of
                their claim for Schlumberger Common Stock or any cash in lieu of
                fractional shares of Schlumberger Common Stock and to
                Schlumberger for any dividends or distributions with respect to
                Schlumberger Common Stock.

          (g)   No Liability. Neither Camco nor STC or any other member of the
                STC Affiliated Group shall be liable to any holder of shares of
                Camco Common Stock or Schlumberger Common Stock, as the case may
                be, for such shares (or dividends or distributions with respect
                thereto) or cash in lieu of fractional shares of Schlumberger
                Common Stock delivered to a public official pursuant to any
                applicable abandoned property, escheat or similar law.

                                  ARTICLE III
                        REPRESENTATIONS AND WARRANTIES

     3.1  Representations and Warranties of Camco.  Subject to the exceptions
set forth in the disclosure letter to be delivered to STC and Sub in connection
herewith (the "Camco Disclosure Letter"), Camco represents and warrants to STC
and Sub as follows:

          (a)   Organization, Standing and Power. Each of Camco and its
                Subsidiaries is a corporation, limited liability company or
                partnership duly organized, validly existing and in good
                standing under the laws of its state of incorporation or
                organization, has all requisite corporate power and authority to
                own, lease and operate its properties and to carry on its
                business as now being conducted, and is duly qualified and in
                good standing to do business in each jurisdiction in which the
                business it is conducting, or the operation, ownership or
                leasing of its properties, makes such qualification necessary,
                other than where the failure to be so organized or so to qualify
                (individually or in the aggregate) would not have a Material
                Adverse Effect (as defined below) on Camco. Camco has heretofore
                delivered to STC complete and correct copies of its Certificate
                of Incorporation and Bylaws. Except as set forth in the exhibits
                to the Camco SEC Documents (as defined in Section 3.1(d)), Camco
                does not own, directly or indirectly, any capital stock or other
                ownership interest in any Subsidiary which would be required to
                be listed as a Subsidiary of Camco under the rules of the SEC
                with the filing by Camco of an Annual Report on Form 10-K. As
                used in this Merger Agreement a "Material Adverse Effect" shall
                mean any effect or change that is or would be materially adverse
                to the business, operations, assets, condition (financial or
                otherwise) or results of operations of (i) in respect of Camco,
                Camco and its direct and indirect Subsidiaries, taken as a
                whole, and (ii) in respect of the STC Affiliated Group, all the
                members of the STC Affiliated Group taken as a whole; provided,
                however, a Material Adverse Effect shall not include (A) any
                effect or change, including changes in national or international
                economic

                                      -7-
<PAGE>
 
                conditions, relating to or affecting the oil and gas service and
                equipment industry as a whole (including a decline in worldwide
                oil and gas commodity prices), (B) changes, or possible changes,
                in foreign, Federal, state or local statutes and regulations,
                (C) the loss of employees, customers or suppliers by Camco or
                one or more of its Subsidiaries as a consequence of any
                announcement relating to the Merger or (D) any action taken or
                required to be taken to satisfy any requirement imposed in
                connection with the review of the Merger under the HSR Act.

          (b)   Capital Structure. As of the date hereof, the authorized capital
                stock of Camco consists of 100,000,000 shares of Camco Common
                Stock and 10,000,000 shares of preferred stock, par value $.01
                per share ("Camco Preferred Stock"). One common share purchase
                right (each, a "Camco Right") issued pursuant to the Rights
                Agreement, dated as of December 15, 1994, between Camco and
                First Chicago Trust Company of New York, as rights agent, as
                amended by the First Amendment to Rights Agreement, dated as of
                October 21, 1997 (as so amended, the "Rights Agreement"), is
                associated with each outstanding share of Camco Common Stock. At
                the close of business on June 8, 1998: (i) 37,968,796 shares of
                Camco Common Stock and no shares of Camco Preferred Stock were
                issued and outstanding, and an aggregate of 2,054,358 shares of
                Camco Common Stock and no shares of Camco Preferred Stock were
                reserved for issuance by Camco pursuant to the following plans:

        Plan                                             Shares Reserved  
        ----                                             --------------- 
                                                                         
        The Camco 1997 Long-Term Incentive Plan                  988,703 
        The Camco 1993 Long-Term Incentive Plan                  644,505 
        The Production Operators Corp. 1992 Long-Term                    
             Incentive Plan                                      205,385 
        The Production Operators Corp. 1980 Long-Term                    
             Incentive Plan                                        2,600 
        The 1996 Savings Related Share Option Scheme              81,500 
        The Camco Non-Employee Directors Stock Option                    
              Plan                                               131,665  


                (collectively, the "Camco Stock Plans"); (ii) 800,802 shares of
                Camco Common Stock were held by Camco in its treasury; and (iii)
                no bonds, debentures, notes or other indebtedness having the
                right to vote (or convertible into securities having the right
                to vote) on any matters on which Camco stockholders may vote
                ("Voting Debt") were issued or outstanding. Except as set forth
                on Schedule 3.1(b) to the Camco Disclosure Letter, all

                                      -8-
<PAGE>
 
                outstanding shares of Camco Common Stock are validly issued,
                fully paid and nonassessable and are not subject to preemptive
                rights. Except as set forth on Schedule 3.1(b) to the Camco
                Disclosure Letter, all outstanding shares of capital stock of
                the Subsidiaries of Camco have been duly authorized and validly
                issued and are fully paid and non-assessable and were not issued
                in violation of any preemptive rights or other preferential
                rights of subscription or purchase other than those that have
                been waived or otherwise cured or satisfied and all such shares
                are owned by Camco, or a direct or indirect wholly owned
                Subsidiary of Camco, free and clear of all liens, charges,
                encumbrances, claims and options of any nature. Except as set
                forth in this Section 3.1(b) or on Schedule 3.1(b) to the Camco
                Disclosure Letter and except for changes since June 8, 1998
                resulting from the exercise of employee stock options granted
                pursuant to, or from issuances or purchases under, the Camco
                Stock Plans or as contemplated by this Merger Agreement, there
                are outstanding: (i) no shares of capital stock, Voting Debt or
                other voting securities of Camco; (ii) no securities of Camco or
                any Subsidiary of Camco convertible into or exchangeable for
                shares of capital stock, Voting Debt or other voting securities
                of Camco or any Subsidiary of Camco; and (iii) no options,
                warrants, calls, rights (including preemptive rights),
                commitments or agreements to which Camco or any Subsidiary of
                Camco is a party or by which it is bound in any case obligating
                Camco or any Subsidiary of Camco to issue, deliver, sell,
                purchase, redeem or acquire, or cause to be issued, delivered,
                sold, purchased, redeemed or acquired, additional shares of
                capital stock or any Voting Debt or other voting securities of
                Camco or of any Subsidiary of Camco, or obligating Camco or any
                Subsidiary of Camco to grant, extend or enter into any such
                option, warrant, call, right, commitment or agreement. There are
                not as of the date hereof and there will not be at the Effective
                Time any stockholder agreements, voting trusts or other
                agreements or understandings to which Camco is a party or by
                which it is bound relating to the voting of any shares of the
                capital stock of Camco. There are no restrictions on Camco to
                vote the stock of any of its Subsidiaries.

          (c) Authority; No Violations; Consents and Approvals.

               (i) The Board of Directors of Camco has approved the Merger and
     this Merger Agreement, by vote of the directors with no negative vote, and
     declared the Merger and this Merger Agreement to be in the best interests
     of the stockholders of Camco.  The directors of Camco have advised Camco
     and STC that they intend to vote or cause to be voted all of the shares of
     Camco Common Stock for which they have voting power in favor of approval of
     the Merger and this Merger Agreement. Camco has all requisite corporate
     power and authority to enter into this Merger Agreement and, subject, with
     respect to consummation of the Merger, to approval of this Merger Agreement
     and the Merger by the stockholders of Camco in accordance 

                                      -9-
<PAGE>
 
     with the DGCL, to consummate the transactions contemplated hereby. The
     execution and delivery of this Merger Agreement and the consummation of the
     transactions contemplated hereby have been duly authorized by all necessary
     corporate action on the part of Camco, subject, with respect to
     consummation of the Merger, to approval of this Merger Agreement and the
     Merger by the stockholders of Camco in accordance with the DGCL. This
     Merger Agreement has been duly executed and delivered by Camco and,
     subject, with respect to consummation of the Merger, to approval of this
     Merger Agreement and the Merger by the stockholders of Camco in accordance
     with the DGCL, and assuming this Merger Agreement constitutes the valid and
     binding obligation of STC and Sub, constitutes a valid and binding
     obligation of Camco enforceable in accordance with its terms, subject, as
     to enforceability, to bankruptcy, insolvency, reorganization and other laws
     of general applicability relating to or effecting creditors' rights and to
     general principles of equity and limitations imposed on indemnity
     obligations by applicable federal and state securities laws.

               (ii) Except as set forth on Schedule 3.1(c) to the Camco
     Disclosure Letter, the execution and delivery of this Merger Agreement does
     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 any obligation or to the loss of a material benefit under,
     or result in the creation of any lien, security interest, charge or
     encumbrance upon any of the properties or assets of Camco or any of its
     Subsidiaries under, any provision of (A) the Certificate of Incorporation
     or Bylaws of Camco or any provision of the comparable charter or
     organizational documents of any of its Subsidiaries, (B) any loan or credit
     agreement, note, bond, mortgage, indenture, lease or other agreement,
     instrument, permit, concession, franchise or license applicable to Camco or
     any of its Subsidiaries or (C) assuming the consents, approvals,
     authorizations or permits and filings or notifications referred to in
     Schedule 3.1(c) to the Camco Disclosure Letter and in subparagraph (iii) of
     this Section 3.1(c) are duly and timely obtained or made and the approval
     of the Merger and this Merger Agreement by the stockholders of Camco has
     been obtained, any judgment, order, decree, statute, law, ordinance, rule
     or regulation applicable to Camco or any of its Subsidiaries or any of
     their respective properties or assets, other than, in the case of clause
     (B) or (C), any such conflicts, violations, defaults, rights, liens,
     security interests, charges or encumbrances that, individually or in the
     aggregate, would not have a Material Adverse Effect on Camco, materially
     impair the ability of Camco to perform its obligations hereunder or prevent
     in any material respect the consummation of any of the transactions
     contemplated hereby.

               (iii)  No consent, approval, order or authorization of, or
     registration, declaration or filing with, or permit from, any U.S. or
     non-U.S. court, administrative agency or commission or other
     governmental authority or instrumentality (a 

                                      -10-
<PAGE>
 
     "Governmental Entity"), is required by or with respect to Camco or any of
     its Subsidiaries in connection with the execution and delivery of this
     Merger Agreement by Camco or the consummation by Camco of the transactions
     contemplated hereby, as to which the failure to obtain or make would have a
     Material Adverse Effect, except for: (A) the filing of a premerger
     notification report by Camco under the Hart-Scott-Rodino Antitrust
     Improvements Act of 1976, as amended (the "HSR Act"), and the expiration or
     termination of the applicable waiting period with respect thereto; (B) the
     filing with the SEC of (1) a proxy statement in preliminary and definitive
     form relating to the meeting of Camco's stockholders to be held in
     connection with the Merger (the "Proxy Statement") and (2) such reports
     under Section 13(a) of the Securities Exchange Act of 1934, as amended (the
     "Exchange Act"), and such other compliance with the Exchange Act and the
     rules and regulations thereunder, as may be required in connection with
     this Merger Agreement and the transactions contemplated hereby; (C) the
     filing of the Certificate of Merger with the Secretary of State of the
     State of Delaware; (D) such filings and approvals as may be required by any
     applicable state securities, "blue sky" or takeover laws, or environmental
     laws; (E) such filings and approvals as may be required by any applicable
     non-U.S. Governmental Entity; and (F) such filings and approvals as may be
     required by any non-U.S. premerger notification, securities, corporate or
     other law, rule or regulation.

          (d)   SEC Documents. Camco has made available to STC a true and
                complete copy of each report, schedule, registration statement
                and definitive proxy statement filed by Camco with the SEC since
                December 31, 1995 and prior to the date of this Merger Agreement
                (the "Camco SEC Documents") which are all the documents that
                Camco was required to file with the SEC since such date. As of
                their respective dates, the Camco 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 may be, and the rules and regulations of the SEC
                thereunder applicable to such Camco SEC Documents, and none of
                the Camco SEC Documents contained when filed any untrue
                statement of a material fact or omitted to state a material fact
                required to be stated therein or necessary to make the
                statements therein, in light of the circumstances under which
                they were made, not misleading. The consolidated financial
                statements of Camco included in the Camco SEC Documents complied
                as to form in all material respects with the published rules and
                regulations of the SEC with respect thereto, were prepared in
                accordance with generally accepted accounting principles
                ("GAAP") applied on a consistent basis during the periods
                involved (except as may be indicated in the notes thereto or, in
                the case of the unaudited statements, as permitted by Rule 10-01
                of Regulation S-X of the SEC) and fairly present in accordance
                with applicable requirements of GAAP (subject, in the case of
                the unaudited statements, to normal year-end adjustments and
                other adjustments discussed therein) the consolidated financial
                position of Camco and its consolidated Subsidiaries as of their
                respective dates and the consolidated 

                                      -11-
<PAGE>
 
                results of operations and the consolidated cash flows of Camco
                and its consolidated Subsidiaries for the periods presented
                therein.

          (e)   Information Supplied. None of the information supplied or to be
                supplied by Camco 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 Schlumberger 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 Camco and
                included or incorporated by reference in the Proxy Statement
                will, at the date mailed to stockholders of Camco or at the time
                of the meeting of such stockholders to be held in connection
                with the Merger, 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.
                If at any time prior to the Effective Time any event with
                respect to Camco or any of its Subsidiaries, or with respect to
                other information supplied by Camco for inclusion in the Proxy
                Statement or S-4, shall occur which is required to be described
                in an amendment of, or a supplement to, the Proxy Statement or
                the S-4, such event shall be so described, and such amendment or
                supplement shall be promptly filed with the SEC and, as required
                by law, disseminated to the stockholders of Camco. The Proxy
                Statement, insofar as it relates to Camco or its Subsidiaries or
                other information supplied by Camco for inclusion therein, will
                comply as to form in all material respects with the provisions
                of the Exchange Act and the rules and regulations thereunder,
                except that no representations or warranties are made by Camco
                with respect to statements made or incorporated by reference
                therein based on information supplied by any member of the STC
                Affiliated Group.

          (f)   Absence of Certain Changes or Events. Except as disclosed in, or
                reflected in the financial statements included in, the Camco SEC
                Documents or on Schedule 3.1(f) to the Camco Disclosure Letter,
                or except as contemplated by this Merger Agreement, since
                December 31, 1997, there has not been: (i) any declaration,
                setting aside or payment of any dividend or other distribution
                (whether in cash, stock or property) with respect to any of
                Camco's capital stock, except for regular quarterly cash
                dividends of $.05 per share on Camco Common Stock; (ii) any
                amendment of any material term of any outstanding equity
                security of Camco or any Subsidiary; (iii) any repurchase,
                redemption or other acquisition by Camco or any Subsidiary of
                any outstanding shares of capital stock or other equity
                securities of, or other ownership interests in, Camco or any
                Subsidiary, except as contemplated by Camco Benefit Plans;  

                                      -12-
<PAGE>
 
                (iv) any material change in any method of accounting or
                accounting practice by Camco or any Subsidiary; or (v) a
                Material Adverse Effect with respect to Camco.

          (g)   No Undisclosed Material Liabilities. Except as disclosed in the
                Camco SEC Documents or on Schedule 3.1(g) to the Camco
                Disclosure Letter, there are no liabilities of Camco or any of
                its Subsidiaries of any kind whatsoever, whether accrued,
                contingent, absolute, determined, determinable or other wise,
                that would have a Material Adverse Effect on Camco, other than:
                (i) liabilities adequately provided for on the balance sheet of
                Camco dated as of March 31, 1998 (including the notes thereto)
                contained in Camco's Quarterly Report on Form 10-Q for the
                quarter ended March 31, 1998; (ii) liabilities incurred in the
                ordinary course of business since March 31, 1998; (iii)
                liabilities under this Merger Agreement and the Transaction
                Agreement; and (iv) except as disclosed on Schedule 3.1(l)(i) to
                the Camco Disclosure Letter and in Section 5.14(f).

          (h)   No Default. Neither Camco nor any of its Subsidiaries is 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) in the
                case of Camco and its Subsidiaries, their respective charter and
                bylaws, (ii) except as disclosed in Schedule 3.1(h) to the Camco
                Disclosure Letter, any note, bond, mortgage, indenture, license,
                agreement or other instrument or obligation to which Camco or
                any of its Subsidiaries is now a party or by which Camco or any
                of its Subsidiaries or any of their respective properties or
                assets may be bound or (iii) any order, writ, injunction,
                decree, statute, rule or regulation applicable to Camco or any
                of its Subsidiaries, except in the case of (ii) and (iii) for
                defaults or violations which in the aggregate would not have a
                Material Adverse Effect on Camco.

          (i)   Compliance with Applicable Laws. Camco and its Subsidiaries hold
                all permits, licenses, variances, exemptions, orders, franchises
                and approvals of all Governmental Entities necessary for the
                lawful conduct of their respective businesses (the "Camco
                Permits"), except where the failure so to hold would not have a
                Material Adverse Effect on Camco. Camco and its Subsidiaries are
                in compliance with the terms of the Camco Permits, except where
                the failure so to comply would not have a Material Adverse
                Effect on Camco. Except as disclosed in the Camco SEC Documents
                or as set forth on Schedule 3.1(i), 3.1(k), 3.1(l), 3.1(m) or
                3.1(o) to the Camco Disclosure Letter, the businesses of Camco
                and its Subsidiaries are not being conducted in violation of any
                law, ordinance or regulation of any Governmental Entity, except
                for possible violations which would not have a Material Adverse
                Effect on Camco. Except as set forth on Schedule 3.1(i) to the
                Camco Disclosure Letter, no investigation or review by any
                Governmental Entity with respect 

                                      -13-
<PAGE>
 
                to Camco or any of its Subsidiaries is pending or, to the best
                knowledge of Camco, threatened, other than those the outcome of
                which would not have a Material Adverse Effect on Camco.

          (j)   Litigation.  Except as disclosed in the Camco SEC Documents or
                in the Camco litigation report previously delivered to STC,
                there is no (i) suit, action or proceeding pending, or, to the
                best knowledge of Camco, threatened against or effecting Camco
                or any Subsidiary of Camco ("Camco Litigation"), or (ii)
                judgment, decree, injunction, rule or order of any Governmental
                Entity or arbitrator outstanding against Camco or any Subsidiary
                of Camco ("Camco Order"), that would (in any case) have a
                Material Adverse Effect on Camco or prevent Camco from
                consummating the transactions contemplated by this Merger
                Agreement.

          (k)   Taxes.

                (i) Except as set forth on Schedule 3.1(k)(i) to the Camco
          Disclosure Letter, each of Camco, each of its Subsidiaries and any
          affiliated, combined or unitary group of which any such corporation is
          or was a member has (A) timely (taking into account any extensions)
          filed in correct form all federal and all material state, local and
          non-U.S. returns, declarations, reports, estimates, information
          returns and statements ("Returns") required to be filed by or with
          respect to it in respect of any Taxes (as hereinafter defined), (B)
          timely paid all Taxes that are due and payable (except for audit
          adjustments which would not have a Material Adverse Effect on Camco in
          the aggregate or to the extent that liability therefor is reserved for
          in Camco's unaudited balance sheet at March 31, 1998 included in the
          most recent Quarterly Report on Form 10-Q of Camco (the "Current
          Balance Sheet")) for which Camco or any of its Subsidiaries may be
          liable, (C) established reserves which are included in the Current
          Balance Sheet that are adequate for the payment of all Taxes not yet
          due and payable with respect to the results of operations of Camco and
          its Subsidiaries through the date of such Current Balance Sheet, and
          (D) complied in all 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 to
          the proper governmental authorities all amounts required to be so
          withheld and paid over, except where such failure to comply or to
          withhold would not have a Material Adverse Effect on Camco.

               (ii) Schedule 3.1(k)(ii) to the Camco Disclosure Letter sets
          forth the last taxable period through which the federal income Tax
          Returns of Camco and any of its Subsidiaries have been examined by the
          Internal Revenue Service ("IRS") or otherwise closed.  Except to the
          extent being contested in good faith, all deficiencies asserted as a
          result of such examinations and any examination by any applicable
          state, local or non-U.S. taxing authority have been paid, fully
          settled or adequately provided for in the Current Balance Sheet.
          Except as adequately provided for in the 

                                      -14-
<PAGE>
 
          Camco SEC Documents or as set forth in Schedule 3.1(k)(ii) to the
          Camco Disclosure Letter, no federal, state, local or non-U.S. Tax
          audits or other administrative proceedings or court proceedings are
          presently pending with regard to any Taxes for which Camco or any of
          its Subsidiaries would be liable, no deficiency for any such Taxes has
          been proposed, asserted or assessed pursuant to any such examination
          against Camco or any of its Subsidiaries by any federal, state, local
          or non-U.S. taxing authority with respect to any period.

               (iii)  Except as disclosed on Schedule 3.1(k)(iii) to the Camco
          Disclosure Letter, neither Camco nor any of its Subsidiaries has
          executed or entered into (or prior to the close of business on the
          Closing Date will execute or enter into) with the IRS or any other
          taxing authority (A) any agreement or other document extending or
          having the effect of extending the period for assessments or
          collection of any Taxes for which Camco or any of its Subsidiaries
          would be liable or (B) a closing agreement pursuant to Section 7121 of
          the Code, or any predecessor provision thereof or any similar
          provision of state, local or non-U.S. Tax law that relates to the
          assets or operations of Camco or any of its Subsidiaries.

               (iv) Except as disclosed on Schedule 3.1(k)(iv) to the Camco
          Disclosure Letter, there are no liens or security interests on any of
          the assets of Camco or any of its Subsidiaries that arose in
          connection with any failure or alleged failure to pay any Tax other
          than for taxes which are not yet delinquent.

               (v) Except as disclosed on Schedule 3.1(k)(v) to the Camco
          Disclosure Letter, neither Camco nor any of its Subsidiaries is a
          party to an agreement that provides for the payment of any amount that
          would constitute a "parachute payment" within the meaning of Section
          280G of the Code.

               (vi) Neither Camco nor any of its Subsidiaries has made an
          election under Section 341(f) of the Code or agreed to have Section
          341(f)(2) of the Code apply to any disposition of a subsection (f)
          asset (as such term is defined in Section 341(f)(4) of the Code) owned
          by Camco or any of its Subsidiaries.

               (vii)  Except as set forth in Camco SEC Documents or as disclosed
          on Schedule 3.1(k)(vii) to the Camco Disclosure Letter, neither Camco
          nor any of its Subsidiaries is a party to, is bound by or has any
          obligation under any tax sharing agreement, tax indemnity agreement or
          similar agreement or arrangement.

               (viii)  Except as disclosed on Schedule 3.1(k)(viii) to the Camco
          Disclosure Letter, neither Camco nor any of its Subsidiaries has any
          liability for Taxes under Treas. Reg. (S) 1.1502-6, or any similar
          provision of state, local or non-U.S. law, except for Taxes of the
          affiliated group of which Camco is the common parent corporation,
          within the meaning of Section 1504(a)(1) of the Code or any similar
          provision of state, local or non-U.S. law.

                                      -15-
<PAGE>
 
               (ix) Neither Camco nor any of its Subsidiaries has participated
          in any international boycott within the meaning of Section 999 of the
          Code.

               (x) Except as disclosed on Schedule 3.1(k)(x) to the Camco
          Disclosure Letter and minor locations not material to the business of
          Camco and its U.S. Subsidiaries, neither Camco nor any of its
          Subsidiaries has had a permanent establishment in any foreign country,
          as defined in any applicable treaty or convention between the United
          States and such foreign country.

               (xi) Neither Camco nor any of its Subsidiaries has been a United
          States real property holding corporation within the meaning of Section
          897(c)(2) of the Code during the applicable period specified in
          Section 897(c)(1)(A)(ii) of the Code.

          For purposes of this Merger Agreement, "Taxes" shall mean all federal,
     state, local, non-U.S. and other taxes, charges, fees, levies, imposts,
     duties, licenses or other assessments, together with any interest,
     penalties, additions to tax or additional amounts imposed by any taxing
     authority.

          (l)  Employee Matters; ERISA.

               (i) Benefit Plans. Schedule 3.1(l)(i) to the Camco Disclosure
          Letter contains a true and complete list of each of the following
          items:  each employee benefit plan, program or arrangement covering
          any current or former officer, director, employee or independent
          contractor of Camco (or any of its Subsidiaries) or any of their
          dependents or beneficiaries (each, a "Camco Beneficiary") including,
          but not limited to, any "employee benefit plan" within the meaning of
          Section 3(3) of the Employee Retirement Income Security Act of 1974,
          as amended ("ERISA"), whether or not terminated or covered by ERISA,
          if Camco or any of its Subsidiaries could have statutory or
          contractual liability with respect thereto on or after the date hereof
          but excluding immaterial plans maintained by Subsidiaries of Camco
          covering employees located outside the United States where such plans
          cover fewer than 100 people. The items described above, together with
          each management, employment, deferred compensation, severance, change
          in control, bonus or other contract for personal services with or
          covering any Camco Beneficiary, whether or not terminated, if Camco or
          any of its Subsidiaries could have statutory or contractual liability
          with respect thereto on or after the date hereof, are referred to
          collectively herein as the "Camco Benefit Plans."

               (ii) Contributions and Payments.  All material contributions and
     other material payments required to have been made by Camco or any entity
     required to be aggregated therewith pursuant to Code Section 414 (a "Camco
     ERISA Affiliate") with respect to any Camco Benefit Plan (or to any person
     pursuant to the terms thereof) have been or will be timely made and all
     such amounts properly accrued 

                                      -16-
<PAGE>
 
         through the date of this Merger Agreement have been reflected in the
         financial statements of Camco included in the Camco SEC Documents.

               (iii)  Qualification; Compliance. Each Camco Benefit Plan that is
          intended to be "qualified" within the meaning of Code Section 401(a)
          has been determined by the IRS to be so qualified or the applicable
          remedial period applicable to the Plan will not have ended prior to
          the Effective Time, and, to the best knowledge of Camco, no event or
          condition exists or has occurred that would reasonably be expected to
          result in the revocation or denial of any such determination which
          would have a Material Adverse Effect on Camco.  With respect to each
          Camco Benefit Plan, Camco and each Camco ERISA Affiliate are in
          compliance with, and each Camco Benefit Plan and related source of
          benefit payment is and has been operated in compliance with, all
          applicable laws, rules and regulations governing such plan or source,
          including, without limitation, ERISA, the Code and applicable local
          law (including non-U.S. law), except for violations that would not
          have a Material Adverse Effect on Camco.  To the best knowledge of
          Camco, except as set forth in Schedule 3.1(l)(iii), no Camco Benefit
          Plan is subject to any ongoing audit, investigation, or other
          administrative proceeding of the IRS, the Department of Labor, or any
          other federal, state, or local governmental entity or is scheduled to
          be subject to such an audit investigation or proceeding.

               (iv) Liabilities.  With respect to the Camco Benefit Plans,
          individually and in the aggregate, and, to the best knowledge of
          Camco, there exists no condition or set of circumstances that could
          subject Camco or any Camco ERISA Affiliate to any liability arising
          under the Code, ERISA or any other applicable law (including, without
          limitation, any liability to or under any such plan or to the Pension
          Benefit Guaranty Corporation ("PBGC"), or under any indemnity
          agreement to which Camco or any Camco ERISA Affiliate is a party),
          which liability, excluding liability for benefit claims, funding
          obligations and PBGC insurance premiums, each payable in the ordinary
          course, would have a Material Adverse Effect on Camco.  No claim,
          action or litigation has been made, commenced or, to the best
          knowledge of Camco, threatened, by or against Camco or any of its
          Subsidiaries with respect to any Camco Benefit Plan (other than for
          benefits or PBGC premiums payable in the ordinary course) that would
          have a Material Adverse Effect on Camco.

               (v) Retiree Welfare Plans.  Except as disclosed in Schedule
          3.1(l)(v) to the Camco Disclosure Letter, no Camco Benefit Plan that
          is a "welfare plan" (within the meaning of ERISA Section 3(1))
          provides benefits for any retired or former employees (other than as
          required pursuant to ERISA Section 601).

               (vi) Payments Resulting from Merger.    Except as disclosed on
          Schedules 3.1(k)(v), 3.1(l)(vi), 4.1(h) and 5.14 to the Camco
          Disclosure Letter, the consummation or announcement of any transaction
          contemplated by this Merger Agreement will not (either alone or upon
          the occurrence of any additional or further 

                                      -17-
<PAGE>
 
          acts or events) result in (A) any payment (whether of severance pay or
          otherwise) becoming due from the Company or Camco or any of their
          Subsidiaries to any Camco Beneficiary or to the trustee under any
          "rabbi trust" or similar arrangement, or (B) any benefit under any
          Camco Benefit Plan being established or increased, or becoming
          accelerated, vested or payable.

               (vii)  Funded Status of Plans.  Each Camco Benefit Plan that is
          subject to either the minimum funding requirements of ERISA Section
          302 or to Title IV of ERISA has assets that, as of the date hereof,
          have a fair market value not less than the present value of the
          accrued benefit obligations thereunder on a termination basis, as of
          the date hereof, based on the actuarial methods, tables and
          assumptions utilized by such plan's independent actuary in preparing
          such plan's most recently prepared actuarial valuation report, except
          to the extent that applicable law would require the use of different
          actuarial assumptions if such plan was to be terminated as of the date
          hereof, in which case those different assumptions shall apply for
          purposes of this representation.  Camco and its Subsidiaries have no
          unfunded liabilities, as determined under local funding requirements,
          with respect to any Camco Benefit Plans that cover such non-U.S.
          employees which would, in the aggregate, have a Material Adverse
          Effect on Camco.

               (viii)  Multiemployer Plans. Except as described on Schedule
          3.1(l)(viii) to the Camco Disclosure Letter, no Camco Benefit Plan is
          or was a "multiemployer plan" (within the meaning of ERISA Section
          4001(a)(3)), a multiple employer plan described in Code Section
          413(c), or a "multiple employer welfare arrangement" (within the
          meaning of ERISA Section 3(40)).  Except as disclosed in Schedule
          3.1(l)(viii) to the Camco Disclosure Letter, neither Camco nor any
          Camco ERISA Affiliate has been obligated to contribute to, or
          otherwise has or has had any liability with respect to, any
          multiemployer plan, multiple employer plan, or multiple employer
          welfare arrangement.

          (m) Labor Matters.  Except as set forth in Schedule 3.1(m) to the
              Camco Disclosure Letter,

               (i) neither Camco nor any of its Subsidiaries is a party to any
          collective bargaining agreement or other current labor agreement with
          any labor union or organization, and to the knowledge of Camco and its
          Subsidiaries there is no current union representation dispute
          involving employees of Camco or any of its Subsidiaries nor does Camco
          or any of its Subsidiaries know of any activity or proceeding of any
          labor organization (or representative thereof) or employee group (or
          representative thereof) to organize any such employees;

               (ii) there is no unfair labor practice charge or grievance
          arising out of a collective bargaining agreement or other grievance
          procedure against Camco or any 

                                      -18-
<PAGE>
 
          of its Subsidiaries pending, or, to the knowledge of Camco or any of
          its Subsidiaries, threatened, that has, or would have, a Material
          Adverse Effect on Camco;

               (iii)  there is no complaint, lawsuit or proceeding in any forum
          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 Camco or any of its Subsidiaries
          pending, or, to the knowledge of Camco or any of its Subsidiaries,
          threatened, that has, or would have, a Material Adverse Effect on
          Camco;

               (iv) there is no strike, dispute, slowdown, work stoppage or
          lockout pending, or, to the knowledge of Camco or any of its
          Subsidiaries, threatened, ]against or involving Camco or any of its
          Subsidiaries that has, or could have, a Material Adverse Effect on
          Camco;

               (v) Camco and each of its Subsidiaries are 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 Camco; and

               (vi) there is no proceeding, claim, suit, action or governmental
          investigation pending or, to the knowledge of Camco or any of its
          Subsidiaries, threatened, in respect to which any current or former
          director, officer, employee or agent of Camco or any of its
          Subsidiaries is or may be entitled to claim indemnification from Camco
          or any of its Subsidiaries (A) pursuant to their respective charters
          or bylaws, (B) as provided in any indemnification agreement to which
          Camco or any Subsidiary of Camco is a party or (C) pursuant to
          applicable law that has, or would have, a Material Adverse Effect on
          Camco.

          (n)   Intangible Property. Camco and its Subsidiaries possess or have
                adequate rights to use all trademarks, trade names, patents,
                service marks, brand marks, brand names, computer programs,
                database, industrial designs, know how, trade secrets,
                copyrights and other intellectual property rights which are
                material to the condition or conduct of the business operations
                of Camco and its Subsidiaries (collectively, the "Camco
                Intangible Property"). Except as set forth on Schedule 3.1(n) to
                the Camco Disclosure Letter, all of the Camco Intangible
                Property is owned by Camco or its Subsidiaries free and clear of
                any and all liens, claims or encumbrances, except those the
                failure to so own would not have a Material Adverse Effect on
                Camco. To the knowledge of Camco, the operation of the
                businesses of each of Camco or its Subsidiaries does not, in any
                material respect, conflict with, infringe upon, violate or

                                      -19-
<PAGE>
 
                interfere with or constitute an appropriation of any right,
                title, interest or goodwill, including, without limitation, any
                intellectual property right, trade secret, trademark, trade
                name, patent, service mark, brand mark, brand name, computer
                program, database, industrial design, copyright or any pending
                application therefor of any other person and there have been no
                claims made in connection therewith and neither Camco nor any of
                its Subsidiaries has received any notice of any claim or
                otherwise knows that any of the Camco Intangible Property is
                invalid or conflicts with the rights of any other person or has
                not been used or enforced or has been failed to be used or
                enforced in a manner that would result in the abandonment,
                cancellation or unenforceability of any of the Camco Intangible
                Property and would individually or in the aggregate result in a
                Material Adverse Effect on Camco. All failures of the
                representations and warranties set forth in this Section 3.1(n)
                to be true, in the aggregate, would not result in a Material
                Adverse Effect on Camco.

          (o)  Environmental Matters.

          For purposes of this Merger Agreement:

                    (A) "Environmental Law" means any applicable law regulating,
               prohibiting or requiring the notification of Releases into any
               part of the natural environment, pertaining to the protection of
               natural resources, the environment and public and employee health
               and safety, or governing or regulating the use, storage,
               handling, transportation, treatment, processing, disposal or
               generation of any Hazardous Materials, including, without
               limitation, the Comprehensive Environmental Response,
               Compensation, and Liability Act ("CERCLA") (42 U.S.C. Section
               9601 et seq.), the Hazardous Materials Transportation Act (49
               U.S.C. Section 1801 et seq.), the Resource Conservation and
               Recovery Act (42 U.S.C. Section 6901 et seq.), the Clean Water
               Act (33 U.S.C. Section 1251 et seq.), the Clean Air Act (33
               U.S.C. Section 7401 et seq.), the Toxic Substances Control Act
               (15 U.S.C. Section 7401 et seq.), the Federal Insecticide,
               Fungicide, and Rodenticide Act (7 U.S.C. Section 136 et seq.),
               Emergency Planning and Community Right to Know Act (42 U.S.C.
               Section 11001 et seq.), Safe Drinking Water Act (Section 42
               U.S.C. Section 300 et seq.) and the Occupational Safety and
               Health Act (29 U.S.C. Section 651 et seq.) ("OSHA") and the
               regulations promulgated pursuant thereto, and any other such
               applicable county, province, state or local statutes, and the
               regulations promulgated pursuant thereto, as such laws have been
               and may be amended or supplemented through the Closing Date.

                    (B) "Hazardous Material" means any substance, material or
               waste which is regulated pursuant to any Environmental Law by any
               public or 

                                      -20-
<PAGE>
 
               governmental authority in the jurisdictions in which the
               applicable party or its Subsidiaries conducts business, or in the
               United States, including, without limitation, any material or
               substance which is defined as a "hazardous waste," "hazardous
               material," "hazardous substance," "extremely hazardous waste" or
               "restricted hazardous waste," "contaminant," "pollutant," "toxic
               waste" or "toxic substance" under any provision of Environmental
               Law;

                    (C) "Release" means any release, spill, effluent, emission,
               leaking, pumping, injection, deposit, disposal, discharge,
               dispersal, leaching or migration into the indoor or outdoor
               environment, or into or out of any property owned, operated or
               leased by the applicable party or its Subsidiaries; and

                    (D) "Remedial Action" means all actions, including, without
               limitation, any capital expenditures, required by a governmental
               entity or required under any Environmental Law, or voluntarily
               undertaken to (I) investigate, clean up, remove, treat, or in any
               other way ameliorate or address any Hazardous Materials or other
               substance in the indoor or outdoor environment; (II) prevent the
               Release or threat of Release, or minimize the further Release of
               any Hazardous Material so it does not endanger or threaten to
               endanger the public health or welfare of the indoor or outdoor
               environment; (III) perform pre-remedial studies and
               investigations or post-remedial monitoring and care pertaining or
               relating to a Release; or (IV) bring the applicable party into
               compliance with any Environmental Law.

               (i) Except as disclosed on Schedule 3.1(o) to the Camco
          Disclosure Letter, the operations of Camco and its Subsidiaries have
          been and, as of the Closing Date, will be in compliance with all
          Environmental Laws, except where the failure to so comply would not
          have a Material Adverse Effect on Camco;

               (ii) Except as disclosed on Schedule 3.1(o) to the Camco
          Disclosure Letter, Camco and its Subsidiaries have obtained and will,
          as of the Closing Date, maintain all permits required under applicable
          Environmental Laws for the continued operations of their respective
          businesses, except such permits the lack of which would not have a
          Material Adverse Effect on Camco;

               (iii)  Except as disclosed on Schedule 3.1(o) to the Camco
          Disclosure Letter, Camco and its Subsidiaries are not subject to any
          outstanding written orders, investigations or material contracts with
          any Governmental Entity or other person respecting (A) Environmental
          Laws, (B) Remedial Action or (C) any Release or threatened Release of
          a Hazardous Material which would have a Material Adverse Effect on
          Camco;

                                      -21-
<PAGE>
 
               (iv) Except as disclosed on Schedule 3.1(o) to the Camco
          Disclosure Letter, Camco and its Subsidiaries have not received any
          written communication alleging, with respect to any such party, the
          violation of or liability under any Environmental Law or liability
          attributable to the Release of any Hazardous Material, which
          violations or liabilities, individually or in the aggregate, would
          have a Material Adverse Effect on Camco;

               (v) Except as disclosed on Schedule 3.1(o) to the Camco
          Disclosure Letter, neither Camco nor any of its Subsidiaries has any
          contingent liabilities in connection with the Release of any Hazardous
          Material into the indoor or outdoor environment (whether on-site or
          off-site) that, individually or in the aggregate, would have a
          Material Adverse Effect on Camco;

               (vi) Except as disclosed on Schedule 3.1(o) to the Camco
          Disclosure Letter, the operations of Camco or its Subsidiaries
          involving the generation, transportation, treatment, storage or
          disposal of Hazardous Material or any state equivalent are in
          compliance with applicable Environmental Laws, except where the
          failure to so comply, individually or in the aggregate, would not
          reasonably be expected to have a Material Adverse Effect on Camco; and

               (vii)  Except as disclosed on Schedule 3.1(o) to the Camco
          Disclosure Letter, to the knowledge of Camco, there is not now on or
          in any property of Camco or its Subsidiaries any of the following: (A)
          any underground storage tanks or surface impoundments; (B) any
          asbestos-containing materials; or (C) any polychlorinated biphenyls,
          any of which ((A), (B), or (C) preceding), individually or in the
          aggregate, would have a Material Adverse Effect on Camco.

          (p)   Opinion of Financial Advisor. Camco has received the opinion of
                Morgan Stanley & Co. Incorporated (a copy of which has been
                delivered to STC) to the effect that, as of the date hereof, the
                Conversion Number is fair from a financial point of view to such
                holders.

          (q)   State Takeover Statutes; Vote Required. Camco has taken all
                action to assure that no state takeover statute or similar
                statute or regulation, including, without limitation, Section
                203 of the DGCL, shall apply to the Merger or any of the other
                transactions contemplated hereby. The affirmative vote of the
                holders of a majority of the outstanding shares of Camco Common
                Stock is the only vote of the holders of any class or series of
                Camco capital stock necessary to approve this Merger Agreement
                and the transactions contemplated hereby. Camco has taken such
                other action with respect to any other anti-takeover provisions
                in its Bylaws, Certificate of Incorporation or the Rights
                Agreement to the extent necessary to consummate the Merger on
                the terms set forth in this Merger Agreement.

                                      -22-
<PAGE>
 
          (r)   Accounting Matters. To the best knowledge of Camco's financial
                and accounting officers, prior to the date hereof, neither Camco
                nor any of its Subsidiaries has taken any action that (without
                giving effect to any action taken or agreed to be taken by STC
                or any of its Subsidiaries) would jeopardize the treatment of
                the business combination to be effected by the Merger as a
                pooling of interests for accounting purposes.

          (s)   Beneficial Ownership of Schlumberger Common Stock. As of the
                date hereof, assuming the accuracy of the representation set
                forth in Section 3.2(b), neither Camco nor its Subsidiaries
                "beneficially owns" (as defined in Rule 13d-3 under the Exchange
                Act) in the aggregate one percent (1%) or more of the
                outstanding Schlumberger Common Stock.

          (t)   Insurance. Camco maintains insurance coverage reasonably
                adequate for the operation of the business of Camco and each of
                its Subsidiaries (taking into account the cost and availability
                of such insurance), and the transactions contemplated hereby
                will not materially adversely affect such coverage.

          (u)   Brokers. Except as disclosed on Schedule 3.1(u) to the Camco
                Disclosure Letter hereof, 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 Merger Agreement based upon arrangements
                made by or on behalf of Camco.

          (v)   Material Contracts and Agreements. All material contracts of
                Camco and its Subsidiaries have been included in Camco SEC
                Documents unless not required to be so included pursuant to the
                rules and regulations of the SEC. Schedule 3.1(v) to the Camco
                Disclosure Letter sets forth a list of all written or oral
                contracts, agreements or arrangements to which Camco or any of
                its Subsidiaries or any of their respective assets is bound
                which would be required to be filed as exhibits to Camco's
                Annual Report on Form 10-K for the year ended December 31, 1997,
                or, based on information currently available to Camco, are
                expected to be required to be filed as an exhibit to Camco's
                Annual Report on Form 10-K for the year ended December 31, 1998.

          (w)   Title to Properties.

                (i) Each of Camco and its Subsidiaries has good and indefeasible
          title to, or valid leasehold interests in, all its properties and
          assets purported to be owned by it in the Camco SEC Documents, except
          for such 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 defects in title, easements, restrictive
          covenants and similar encumbrances or impediments that, in the
          aggregate, do not and will not materially 

                                      -23-
<PAGE>
 
          interfere with its ability to conduct its business as currently
          conducted. All such assets and properties, other than assets and
          properties in which Camco or any of the Subsidiaries has leasehold
          interests, are free and clear of all liens, other than those set forth
          in the Camco SEC Documents, and except for liens, that, in the
          aggregate, do not and will not materially interfere with the ability
          of Camco or any of its Subsidiaries to conduct business as currently
          conducted.

               (ii) Except as would not have a Material Adverse Effect on Camco,
          each of Camco and its Subsidiaries 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.  Each of Camco and its Subsidiaries enjoys peaceful and
          undisturbed possession under all such leases.

          (x)   Amendment to the Camco Rights Agreement. Camco has amended the
                Rights Agreement so that none of the execution and delivery of
                this Merger Agreement, the conversion of shares of Camco Common
                Stock into the right to receive Schlumberger Common Stock in
                accordance with Article II of this Merger Agreement, and the
                consummation of the Merger or any other transaction contemplated
                hereby will cause (A) the Camco Rights to become exercisable
                under the Rights Agreement, (B) any member of the STC Affiliated
                Group to be deemed an "Acquiring Person" (as defined in the
                Rights Agreement), (C) the provisions of Section 11 or Section
                13 to become applicable to any such event or (D) the
                "Distribution Date" or the "Share Acquisition Date" (each as
                defined in the Rights Agreement) to occur upon any such event,
                and so that the "Expiration Date" (as defined in the Rights
                Agreement) of the Camco Rights will occur immediately prior to
                the Effective Time. Camco has delivered to STC a true and
                complete copy of the Rights Agreement, as amended to date.

     3.2  Representations and Warranties of STC and Sub.  Subject to the
exceptions set forth in the disclosure letter to be delivered to Camco in
connection herewith (the "STC Disclosure Letter"),  STC and Sub jointly and
severally represent and warrant to Camco as follows:

          (a)   Organization, Standing and Power. Each of STC and Sub is a
                corporation duly organized, validly existing and in good
                standing under the laws of its state of incorporation or
                organization, has all requisite corporate power and authority to
                own, lease and operate its properties and to carry on its
                business as now being conducted, and is duly qualified and in
                good standing to do business in each jurisdiction in which the
                business it is conducting, or the operation, ownership or
                leasing of its properties, makes such qualification necessary,
                other than in such jurisdictions where the failure to be so
                organized or so to qualify (individually or in the aggregate)
                would not have a Material Adverse Effect on the STC Affiliated
                Group.

                                      -24-
<PAGE>
 
          (b)   Capital Structure. As of the date hereof, the authorized capital
                stock of STC consists of 1,000 shares of common stock, par value
                $100 per share, 500 shares of which are validly issued, fully
                paid and nonassessable, and are owned by Schlumberger and the
                balance of which are not issued or outstanding. As of the date
                hereof, the authorized capital stock of Sub consists of 10,000
                shares of common stock, par value $1.00 per share, 1,000 shares
                of which are validly issued, fully paid and nonassessable, and
                are owned by STC and the balance of which are not issued or
                outstanding. Sub was formed solely for the purpose of
                participating in the Merger, has no assets other than (i) that
                amount of cash which is required for it to be organized as a
                corporation under the DGCL and (ii) such shares of Schlumberger
                Common Stock as are necessary to effect the transactions
                contemplated hereby and has conducted no activities to date,
                other than in connection with the Merger.

          (c)   Authority; No Violations, Consents and Approvals.

               (i) Each of STC and Sub has all requisite corporate power and
          authority to enter into this Merger Agreement and to consummate the
          transactions contemplated hereby.  The execution and delivery of this
          Merger Agreement and the consummation of the transactions contemplated
          hereby have been duly authorized by all necessary corporate action on
          the part of STC and Sub.  This Merger Agreement has been duly executed
          and delivered by STC and Sub.  Assuming this Merger Agreement
          constitutes the valid and binding obligation of Camco, it also
          constitutes a valid and binding obligation of each of STC and Sub and
          is enforceable against each of them in accordance with its terms;
          provided, however, that such enforceability is subject to bankruptcy,
          insolvency, reorganization and other laws of general applicability
          relating to or affecting creditors' rights and to general principles
          of equity and limitations imposed on indemnity obligations by
          applicable federal and state securities laws.

               (ii) Except as set forth on Schedule 3.2(c)(ii) to the STC
          Disclosure Letter, the execution and delivery of this Merger Agreement
          does 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 any obligation or to the loss of a
          material benefit under, or result in the creation of any lien,
          security interest, charge or encumbrance upon any of the properties or
          assets of STC or Sub under, any provision of (A) the Certificate of
          Incorporation or Bylaws of STC or Sub, (B) any loan or credit
          agreement, note, bond, mortgage, indenture, lease or other agreement,
          instrument, permit, concession, franchise or license applicable to STC
          or Sub or (C) assuming the consents, approvals, authorizations or
          permits and filings or notifications referred to in Section
          3.2(c)(iii) are duly and timely obtained or made, 

                                      -25-
<PAGE>
 
          any judgment, order, decree, statute, law, ordinance, rule or
          regulation applicable to STC or Sub or any of properties or assets,
          other than, in the case of clause (B) or (C), any such conflicts,
          violations, defaults, rights, liens, security interests, charges or
          encumbrances that, individually or in the aggregate, would not have a
          Material Adverse Effect on the STC Affiliated Group, materially impair
          the ability of STC or Sub to perform its respective obligations
          hereunder or prevent in any material respect the consummation of any
          of the transactions contemplated hereby.

               (iii)  No consent, approval, order or authorization of, or
          registration, declaration or filing with, or permit from any
          Governmental Entity is required by or with respect to STC or any other
          member of the STC Affiliated Group in connection with the execution
          and delivery of this Merger Agreement by STC and Sub or the
          consummation by STC and Sub of the transactions contemplated hereby,
          as to which the failure to obtain or make would have a Material
          Adverse Effect on the STC Affiliated Group, except for: (A) the filing
          of a premerger notification report under the HSR Act and the
          expiration or termination of the applicable waiting period with
          respect thereto; (B) the filing with the SEC of the Proxy Statement,
          the S-4, such reports under Section 13(a) of the Exchange Act and such
          other compliance with the Securities Act and the Exchange Act and the
          rules and regulations thereunder as may be required in connection with
          this Merger Agreement and the transactions contemplated hereby, and
          the obtaining from the SEC of such orders as may be so required; (C)
          the filing of the Certificate of Merger with the Secretary of State of
          the State of Delaware; (D) filings with, and approval of, the New York
          Stock Exchange, Inc. (the "NYSE"); (E) such filings and approvals as
          may be required by any applicable state securities, "blue sky" or
          takeover laws or environmental laws; (F) such filings and approvals as
          may be required by any applicable non-U.S. Governmental Entity; and
          (G) such filings and approvals as may be required by any non-U.S.
          premerger notification, securities, corporate or other law, rule or
          regulation.

          (d)   Litigation.  Except as disclosed on Schedule 3.2(d) to the STC
                Disclosure Letter, there is no (i) suit, action or proceeding
                pending, or, to the best knowledge of STC, threatened against or
                affecting any member of the STC Affiliated Group ("STC
                Litigation"), or (ii) judgment, decree, injunction, rule or
                order of any Governmental Entity or arbitrator outstanding
                against STC or any Subsidiary of STC, that would (in any case)
                have a Material Adverse Effect on the STC Affiliated Group or
                prevent STC or Sub from consummating the transactions
                contemplated by this Merger Agreement.

          (e)   Accounting Matters. To the best knowledge of STC's financial and
                accounting officers, prior to the date hereof, no member of the
                STC Affiliated Group has taken any action that (without giving
                effect to any action taken or agreed to be taken by Camco or any
                of its Subsidiaries) would jeopardize the treatment of the
                business combination to be effected by the Merger as a pooling
                of interests for accounting purposes.

                                      -26-
<PAGE>
 
          (f)   Beneficial Ownership of Camco Common Stock. As of the date
                hereof, neither STC nor any member of the STC Affiliated Group
                "beneficially owns" (as defined in Rule 13d-3 under the Exchange
                Act) any shares of Camco Common Stock.

          (g)   Transaction Agreement. The representations and warranties made
                by any member of the STC Affiliated Group which is a party to
                the Transaction Agreement are true and correct in all material
                respects as set forth therein.

          (h)   No Other Consideration for Camco Common Stock. Neither STC nor
                any member of the STC Affiliated Group (i) owns any stock of
                Camco, (ii) has previously owned any stock of Camco, except for
                stock (if any) which was subsequently disposed of to unrelated
                parties, (iii) has any plan or intention to acquire any stock of
                Camco, other than as provided herein, or (iv) has agreed to pay,
                will pay or will cause to be paid any consideration (whether
                material or immaterial) for shares of Camco capital stock other
                than the shares of Schlumberger Common Stock described herein
                and any payments in lieu of fractional shares described in
                Section 2.2(e), which consideration could cause the Merger to
                fail to qualify as a reorganization under Section 368(a)(1)(B)
                of the Code.

                                  ARTICLE IV
              COVENANTS RELATING TO CONDUCT OF BUSINESS OF CAMCO

     4.1  Conduct of Business by Camco Pending the Merger.  During the period
from the date of this Merger Agreement and continuing until the Effective Time,
Camco agrees as to itself and its Subsidiaries that (except as expressly
contemplated or permitted by this Merger Agreement, or to the extent that STC
shall otherwise consent in writing):

          (a)   Ordinary Course.  Except as provided on Schedule 4.1(a) to the
                Camco Disclosure Letter, each of Camco and its Subsidiaries
                shall carry on its businesses in the usual, regular and ordinary
                course in substantially the same manner as heretofore conducted
                and, to the extent consistent therewith, shall use all
                reasonable efforts to preserve intact its present business
                organizations, keep available the services of its current
                officers and employees and endeavor to preserve its
                relationships with customers, suppliers and others having
                business dealings with it, in each case consistent with past
                practices, to the end that its goodwill and ongoing business
                shall not be impaired in any material respect to the fullest
                extent reasonably possible at the Effective Time.

          (b)   Dividends; Changes in Stock.  Except as provided on Schedule
                4.1(b) to the Camco Disclosure Letter, Camco shall not and it
                shall not permit any of its Subsidiaries to: (i) declare or pay
                any dividends on or make other 

                                      -27-
<PAGE>
 
                distributions in respect of any of its capital stock or
                partnership interests, except for the declaration and payment of
                regular quarterly cash dividends not in excess of $.05 per share
                of Camco Common Stock and dividends from a Subsidiary of Camco
                to Camco or another Subsidiary of Camco and except for cash
                distributions paid on or with respect to partnership interests
                of a Subsidiary of Camco; (ii) split, combine or reclassify any
                of its capital stock or issue or authorize or propose the
                issuance of any other securities in respect of, in lieu of or in
                substitution for shares of Camco capital stock; or (iii)
                repurchase, redeem or otherwise acquire, or permit any of its
                Subsidiaries to purchase, redeem or otherwise acquire, any
                shares of Camco's capital stock, except as required by the terms
                of its securities outstanding on the date hereof or as
                contemplated by any existing employee benefit plan.

          (c)   Issuance of Securities. Except as provided on Schedule 4.1(c) to
                the Camco Disclosure Letter, Camco shall not, and it shall not
                permit any of its Subsidiaries to, issue, deliver or sell, or
                authorize or propose to issue, deliver or sell, any shares of
                its capital stock of any class, any Voting Debt or any
                securities convertible into, or any rights, warrants or options
                to acquire, any such shares, Voting Debt or convertible
                securities, other than: (i) the issuance of Camco Common Stock
                upon the exercise of stock options granted under the Camco Stock
                Plans that are outstanding on the date hereof, or in
                satisfaction of stock grants or stock-based awards made prior to
                the date hereof pursuant to the Camco Stock Plans; and (ii)
                issuances by a wholly owned Subsidiary of its capital stock to
                its parent.

          (d)   Governing Documents.  Except as contemplated hereby or in
                connection herewith, Camco shall not amend or propose to amend
                its Certificate of Incorporation or Bylaws.

          (e)   No Acquisitions.  Except for proposed acquisitions listed on
                Schedule 4.1(e) to the Camco Disclosure Letter, Camco shall not
                and it shall not permit any of its Subsidiaries to, acquire or
                agree to acquire by merging or consolidating with, or by
                purchasing a substantial equity interest in or a substantial
                portion of the assets of, or by any other manner, any business
                or any corporation, partnership, association or other business
                organization or division thereof involving the payment of
                consideration in excess of $5 million in the aggregate without
                the prior written consent of STC.

          (f)   No Dispositions.  Other than: (i) dispositions or proposed
                dispositions listed on Schedule 4.1(f) to the Camco Disclosure
                Letter; (ii) as may be necessary or required by law to
                consummate the transactions contemplated hereby; (iii) sales or
                leases in the ordinary course of business consistent with past
                practice or (iv) other dispositions not aggregating more than $5
                million, Camco shall not and it shall not permit any of its
                Subsidiaries to sell, lease, encumber or 

                                      -28-
<PAGE>
 
                otherwise dispose of, or agree to sell, lease (whether such
                lease is an operating or capital lease), encumber or otherwise
                dispose of, any of its assets without the prior written consent
                of STC.

          (g)   No Dissolution, Etc.  Except as otherwise permitted or
                contemplated by this Merger Agreement, Camco shall not
                authorize, recommend, propose or announce an intention to adopt
                a plan of complete or partial liquidation or dissolution of
                Camco or any of its Subsidiaries that would constitute a
                "significant subsidiary" within the meaning of Rule 1.02 of
                Regulation S-X promulgated under the Securities Act (a
                "Significant Subsidiary").

          (h)   Certain Employee Matters.  Except as set forth on Schedules
                3.1(k)(v), 3.1(l)(i), 3.1(l)(vi) and 4.1(h) to the Camco
                Disclosure Letter and in Section 5.14 or as may be required by
                applicable law or any agreement to which Camco or any Camco
                ERISA Affiliate is a party on the date hereof or as expressly
                contemplated by this Merger Agreement Camco shall not, nor shall
                it permit any Camco ERISA Affiliate to:

               (i)      amend, or increase the amount of (or accelerate the
                        payment or vesting of) any benefit or amount payable
                        under, any employee benefit plan or any other contract,
                        agreement, commitment, arrangement, plan or policy
                        providing for compensation or benefits to any current or
                        former director, officer, employee or independent
                        contractor who would be deemed to be an employee under
                        applicable guidelines published by the IRS, and
                        maintained by, contributed to or entered into by, Camco
                        or any Camco ERISA Affiliate, including, without
                        limitation, the existing Camco Benefit Plans;

               (ii)     increase (or enter into any contract, agreement,
                        commitment or arrangement to increase in any manner) the
                        compensation or fringe benefits, or otherwise to extend,
                        expand or enhance the engagement, employment or any
                        related rights, of any current or former director,
                        officer, employee or independent contractor who would be
                        deemed to be an employee under applicable guidelines
                        published by the IRS, of Camco or any Camco ERISA
                        Affiliate, except increases in the ordinary course of
                        business consistent with past practice;

               (iii)    adopt, establish or implement any plan, policy or other
                        arrangement providing for any form of benefits or other
                        compensation to any current or former director, officer,
                        employee or independent contractor who would be deemed
                        to be an employee under applicable guidelines published
                        by the IRS, of Camco or any Camco ERISA Affiliate;

                                      -29-
<PAGE>
 
               (iv)     enter into or amend any employment agreement, severance
                        agreement, or other contract, agreement or arrangement
                        with any current or former director, officer, employee
                        or independent contractor who would be deemed to be an
                        employee under applicable guidelines published by the
                        IRS, of Camco or any Camco ERISA Affiliate; or

               (v)      pay or agree to pay any pension, retirement allowance or
                        other benefit not required or contemplated by any of the
                        existing Camco Benefit Plans as in effect on the date of
                        this Merger Agreement to any current or former director,
                        officer, employee or independent contractor who would be
                        deemed to be an employee under applicable guidelines
                        published by the IRS, of Camco or any Camco ERISA
                        Affiliate.

          (i)   Indebtedness; Leases; Capital Expenditures. Except as set forth
                on Schedule 4.1(i) to the Camco Disclosure Letter, Camco shall
                not, nor shall Camco permit any of its Subsidiaries to, (A)
                incur any indebtedness for borrowed money (except for working
                capital under Camco's existing credit facilities, and
                refinancings of existing debt that permit prepayment of such
                debt without penalty (other than LIBOR breakage costs)) or
                guarantee any such indebtedness or issue or sell any debt
                securities or warrants or rights to acquire any debt securities
                of Camco or any of its Subsidiaries or guarantee any debt
                securities of others if the aggregate amount of all such
                indebtedness incurred or guaranteed exceeds $25 million, (B)
                except in the ordinary course of business, enter into any lease
                (whether such lease is an operating or capital lease) or create
                any mortgages, liens, security interests or other encumbrances
                on the property of Camco or any of its Subsidiaries in
                connection with any indebtedness thereof, except for those
                securing purchase money indebtedness or (C) commit to aggregate
                capital expenditures in excess of $25 million outside the
                capital budget, as approved by Camco prior to the date hereof
                and disclosed on Schedule 4.1(i) to the Camco Disclosure Letter.

          (j)   Taxes.  Neither Camco nor any of its Subsidiaries shall make any
                material election relating to Taxes or compromise any material
                Tax liability.

          (k)   Accounting.  Neither Camco nor any of its Subsidiaries shall
                change any material accounting principle used by it, except as
                required by statement, rules or regulations promulgated by the
                FASB or the SEC.

     4.2  No Solicitation.

          (a)   Camco will not, and will not authorize or permit any of its
                officers, directors, agents and other representatives or those
                of any of its Subsidiaries (collectively, "Camco
                Representatives") to, and will not authorize any

                                      -30-
<PAGE>
 
                employee of Camco or any of its Subsidiaries to and on becoming
                aware of will take all reasonable actions to stop the employee
                from continuing to, directly or indirectly, solicit or initiate
                or encourage (including by way of furnishing information) any
                prospective buyer or the making of any proposal that
                constitutes, or may reasonably be expected to lead to, an
                Acquisition Proposal (as defined herein) from any person, or
                engage in any discussions or negotiations relating thereto or
                accept any Acquisition Proposal; provided, however, that,
                notwithstanding any other provision of this Merger Agreement,
                Camco may, prior to the vote of the stockholders of Camco for
                approval of the Merger, but not thereafter if the Merger is
                approved thereby, in response and only in response to a written
                request made without any solicitation, initiation,
                encouragement, discussion or negotiation by Camco or any Camco
                Representatives, furnish information concerning Camco to any
                person or "group" (within the meaning of Section 13(d)(3) of the
                Exchange Act) pursuant to a confidentiality agreement on
                substantiality the same terms (provided that the Camco Board of
                Directors may, if required by its fiduciary duties, permit an
                offer to be received from such group in accordance with the
                terms of such confidentiality agreement) as the Confidentiality
                Agreements between Camco and STC described in Section 5.1
                hereof, provided that the Board of Directors of Camco shall
                conclude in good faith on the basis of the written advice of
                outside counsel to Camco that such action is necessary in order
                for the Board of Directors of Camco to act in a manner that is
                consistent with its fiduciary obligations under applicable law.
                Camco shall immediately cease and cause to be terminated any
                existing solicitation, initiation, encouragement, activity,
                discussion or negotiation with any parties conducted heretofore
                by Camco or any Camco Representatives with respect to any
                Acquisition Proposal existing on the date hereof. Camco will
                promptly notify STC of the pendency of any negotiations
                respecting, or the receipt of, any Acquisition Proposal. It is
                understood that any violation of this Section 4.2 by Camco or
                any Camco Representative shall be deemed a material breach of
                this Merger Agreement by Camco. As used in this Merger
                Agreement, "Acquisition Proposal" shall mean any proposal or
                offer, other than a proposal or offer by STC or another member
                of the STC Affiliated Group, for a tender or exchange offer, a
                merger, consolidation or other business combination involving
                Camco or any Significant Subsidiary of Camco or any proposal to
                acquire in any manner a substantial (15% or more) equity
                interest in, or substantially all of the assets of, Camco or any
                of its Significant Subsidiaries.

          (b)   Neither the Board of Directors of Camco nor any committee
                thereof shall, except in connection with the termination of this
                Merger Agreement pursuant to Section 7.1(a), (b) or (d), (i)
                withdraw or modify, or propose to withdraw or modify, in a
                manner adverse to Schlumberger or STC, the approval or
                recommendation by the Board of Directors of Camco or any such
                committee 

                                      -31-
<PAGE>
 
                of this Merger 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 Camco
                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 based on the advice of
                outside counsel), it determines to be a Superior Proposal, the
                Board of Directors may withdraw or modify its approval or
                recommendation of this Merger Agreement or the Merger and may
                (subject to the following sentence) terminate this Merger
                Agreement, in each case at any time after midnight on the second
                business day following STC's receipt of written notice (a
                "Notice of Superior Proposal") advising STC 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. Camco may terminate this Merger Agreement
                pursuant to the preceding sentence only if the stockholders of
                Camco shall not yet have voted upon the Merger and Camco shall
                have paid to STC the Termination Fee (as defined in Section
                7.2(b)). Any of the foregoing to the contrary notwithstanding,
                Camco may engage in discussions with any party that has made an
                unsolicited takeover proposal for the limited purpose of
                determining whether such proposal (as opposed to any further
                negotiated proposal) is a Superior Proposal. Nothing contained
                herein shall prohibit Camco from taking and disclosing to its
                stockholders a position contemplated by Rule 14e-2(a) following
                STC's receipt of a Notice of Superior Proposal.

          (c)   For purposes of this Merger Agreement, a "Superior Proposal"
                means any bona fide proposal to acquire, directly or indirectly,
                all of the Camco Common Stock then outstanding or all or
                substantially all of the assets of Camco and its Subsidiaries,
                and otherwise on terms which a majority of the disinterested
                members of the Board of Directors of Camco determines in its
                good faith reasonable judgment (based on the written advice of a
                financial advisor of national recognized reputation, a copy of
                which shall be provided to STC) to be more favorable to Camco's
                stockholders than the Merger. In reaching such good faith
                determination, the Board of Directors of Camco will give
                significant consideration to whether an Acquisition Proposal
                includes definite financing.

     4.3  Pooling of Interests.  If so requested by STC, Camco shall, and shall
cause its independent accountants and other representatives to, fully cooperate
with STC, its independent accountants and other representatives in seeking to
obtain confirmation from the SEC that the Merger may be accounted for as a
"pooling of interests."

                                      -32-
<PAGE>
 
                                   ARTICLE V
                             ADDITIONAL AGREEMENTS

     5.1  Access to Information.  Subject to the provisions of Section 5.3, upon
reasonable notice, Camco shall afford to the officers, employees, accountants,
counsel and other representatives of STC, access, during normal business hours
during the period prior to the Effective Time, to all its properties, books,
contracts, commitments and records and, during such period, Camco shall furnish
promptly to STC or a designated member of the STC Affiliated Group (a) a copy of
each report, schedule, registration statement and other document filed or
received by it during such period pursuant to SEC requirements and (b) all other
information concerning its business, properties and personnel as STC or the
other members of the STC Affiliated Group may reasonably request.  Upon
reasonable notice, STC shall provide the officers, employees, accountants,
counsel and other representatives of Camco such information and materials
concerning STC and the other members of the STC Affiliated Group as is
reasonably necessary for Camco to complete its due diligence with respect to
this Merger Agreement and the Transaction Agreement.  Camco agrees that neither
Camco nor any of its Subsidiaries or any representatives of any of the foregoing
entities will use any information obtained pursuant to this Section 5.1 for any
purpose unrelated to the consummation of the transactions contemplated by this
Merger Agreement and the Transaction Agreement.  STC agrees that no member of
the STC Affiliated Group, or any representative of any member of the STC
Affiliated Group will use any information obtained pursuant to this Section 5.1
for any purpose unrelated to the consummation of the transactions contemplated
by this Merger Agreement and the Transaction Agreement.  Notwithstanding the
foregoing, neither Camco nor STC shall be required to give the other party any
information that is subject to a confidentiality agreement and that relates
primarily to a party other than Camco and its subsidiaries on the one hand or a
member of the STC Affiliated Group on the other.  The Confidentiality Agreements
dated as of May 11, 1998 between STC and Camco (the "Confidentiality
Agreements") shall apply with respect to information furnished thereunder or
hereunder and any other activities contemplated thereby.

     5.2  Camco Stockholders' Meeting.  Camco shall call a meeting of its
stockholders to be held as promptly as practicable after the date hereof for the
purpose of voting upon this Merger Agreement and the Merger.  Subject to
Sections 4.2(a) and (b), Camco will, through its Board of Directors, recommend
to its stockholders approval of such matters and not rescind such recommendation
and shall use its best efforts to obtain approval and adoption of this Merger
Agreement and the Merger by its stockholders.  Camco shall use all reasonable
efforts to hold such meeting as soon as practicable after the date upon which
the S-4 becomes effective.

     5.3  Legal Conditions to Merger.

          (i)   Except as otherwise provided herein, each of Camco, STC and Sub
                will take all reasonable actions necessary to comply promptly
                with all legal requirements that may be imposed on such party
                with respect to the Merger (including, without limitation,
                furnishing all information required under the HSR Act and in
                connection with approvals of or filings with any other
                Governmental Entity) and will promptly cooperate with and
                furnish

                                      -33-
<PAGE>
 
                information to each other in connection with any such
                requirements imposed upon any of them or any of their
                Subsidiaries in connection with the Merger. Each of Camco and
                STC will, and will cause its respective Subsidiaries to, take
                all actions necessary to obtain (and will cooperate with each
                other in obtaining) any consent, acquiescence, authorization,
                order or approval of, or any exemption or nonopposition by, any
                Governmental Entity or court required to be obtained or made by
                Camco, STC or any of their Subsidiaries in connection with the
                Merger or the taking of any action contemplated thereby or by
                this Merger Agreement, including complying with any requests or
                orders made by the Justice Department or the Federal Trade
                Commission in connection with the Merger.

          (ii)  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 reasonable
                efforts to promptly respond to any request for additional
                information pursuant to Section (e)(1) of the HSR Act. Except as
                otherwise required by United States regulatory considerations,
                Camco will furnish to STC copies of all correspondence, filings
                or communications (or memoranda setting forth the substance
                thereof (collectively, "Company HSR Documents")) between Camco,
                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 (x) with respect to
                documents and other materials filed by or 

                                      -34-
<PAGE>
 
                on behalf of Camco with the Antitrust Division of the Department
                of Justice, the Federal Trade Commission, or any state attorneys
                general that are available for review by STC, copies will not be
                required to be provided to STC and (y) with respect to any Camco
                HSR Documents (1) that contain any information which, in the
                reasonable judgment of Fulbright & Jaworski L.L.P., should not
                be furnished to STC 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 Camco to
                furnish any such Camco HSR Documents to STC shall be satisfied
                by the delivery of such Camco HSR Documents on a confidential
                basis to Baker & Botts, L.L.P., pursuant to a confidentiality
                agreement in form and substance reasonably satisfactory to STC.
                Except as otherwise required by United States regulatory
                considerations, STC will furnish to Camco copies of all
                correspondence, filings or communications (or memoranda setting
                forth the substance thereof (collectively, "STC HSR Documents"))
                between STC or any of its representatives, on the one hand, and
                any Governmental Entity, or member of the staff of such agency
                or authority, on the other 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 (x) with respect to documents and other materials
                filed by or on behalf of STC with the Antitrust Division of the
                Department of Justice, the Federal Trade Commission, or any
                state attorneys general that are available for review by Camco,
                copies will not be required to be provided to Camco, and (y)
                with respect to any STC HSR Documents (1) that contain
                information which, in the reasonable judgment of Baker & Botts,
                L.L.P., should not be furnished to Camco 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 STC to furnish any such STC HSR Documents to Camco
                shall be satisfied by the delivery of such STC HSR Documents on
                a confidential basis to Fulbright & Jaworski L.L.P. pursuant to
                a confidentiality agreement in form and substance reasonably
                satisfactory to Camco.

          (iii) In the event that any governmental body with jurisdiction of
                this Merger shall require any member of the STC Affiliated Group
                to agree to take or not to take any action as a condition to
                approving or not objecting to the Merger, STC will take such
                action (A) if the loss in annual revenues to the Surviving
                Corporation would reasonably be expected not to exceed $75
                million during the ensuing twelve months following the Closing,
                or (B) if STC otherwise considers it reasonable and appropriate
                in the circumstances to take such action.

     5.4  Agreements of Others.  No later than five days prior to the day on
which the meeting of stockholders of Camco to approve the Merger is held, Camco
shall use its best efforts to cause each person who STC reasonably believes to
be an affiliate of Camco within the meaning of Rule 145 of the General Rules and
Regulations of the SEC under the Securities Act, after consultation with Camco
and its legal counsel, to deliver (a) a written agreement, in the form to be
approved by STC and Camco, that such persons will not sell, pledge, transfer or
otherwise dispose of any shares of Schlumberger Common Stock issued to such
persons pursuant to the Merger or any other shares of Schlumberger Common Stock
that such persons control the disposition of, except pursuant to an effective
registration statement or in compliance with Rule 145 or an exemption from the
registration requirements of the Securities Act and (b) a written agreement, in
the form to be approved by STC and Camco, that such persons will not sell or in
any other way reduce his or her risk relative to any shares of Schlumberger
Common Stock received in the Merger (within the meaning of Section 201.01 of the
SEC's Financial Reporting Release No. 1), until such time as financial results
(including combined sales and net income) covering at least 30 days of post-
merger operations have been published, except as permitted by Staff Accounting
Bulletin No. 76 (or any successor thereto) issued by the SEC.

     5.5  Stock Options.  At the Effective Time, each outstanding option to
purchase Camco Common Stock and any stock appreciation rights related thereto
that has been granted pursuant to the Camco Stock Plans ("Camco Stock Option"),
whether vested or unvested, shall be deemed to constitute an option to acquire,
on the same terms and conditions as were applicable under such Camco Stock
Option, a number of shares of Schlumberger Common Stock equal to the number of

                                      -35-
<PAGE>
 
shares of Camco Common Stock purchasable pursuant to such Camco Stock Option
multiplied by the Conversion Number, at a price per share equal to the per-share
exercise price for the shares of Camco Common Stock purchasable pursuant to such
Camco Stock Option divided by the Conversion Number; provided, however, that in
the case of any Camco Stock Option to which Code Section 421 applies by reason
of its qualification under any of the Code Sections 422-424, the exercise price
and number of shares subject to such option shall be determined in a manner that
meets the requirements for issuing or assuming a stock option in a transaction
to which Code Section 424(a) applies and provided further, that the number of
shares of Schlumberger Common Stock that may be purchased upon exercise of such
Camco Stock Option shall not include any fractional share and, upon exercise of
such Camco Stock Option, a cash payment shall be made for any fractional share
based upon the closing price of a share of Schlumberger Common Stock on the NYSE
on the last trading day of the calendar month immediately preceding the date of
exercise.

     5.6  Indemnification; Directors' and Officers' Insurance.

          (a)   Camco shall, and from and after the Effective Time, STC and the
                Surviving Corporation 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 Camco or any of its Subsidiaries or an
                employee of Camco or any of its Subsidiaries who acts as a
                fiduciary under any Camco Benefit Plans (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 Camco or any Subsidiary, 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)
                ("Indemnified Liabilities"). Any Indemnified Party wishing to
                claim indemnification under this Section 5.6, upon learning of
                any such claim, action, suit, proceeding or investigation, shall
                notify Camco (or after the Effective Time, STC and the Surviving
                Corporation), but the failure so to notify shall not relieve a
                party from any liability that it may have under this Section
                5.6, except to the extent such failure materially prejudices
                such party. 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 on any significant issue between the
                positions of any two or more Indemnified Parties.

                                      -36-
<PAGE>
 
          (b)   STC shall use its reasonable best 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 Camco and its Subsidiaries as of the
                date of this Merger Agreement with respect to matters arising
                before the Effective Time, provided that STC shall not be
                required to pay an annual premium for such insurance in excess
                of two times the last annual premium paid by Camco prior to the
                date hereof, 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 Certificate of
                Incorporation or by-laws of Camco or its subsidiaries and in any
                indemnification agreements to which they are parties shall
                survive the Merger, and the Surviving Corporation 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 STC shall be financially responsible therefor. The
                provisions of this Section 5.6 are intended to be for the
                benefit of, and shall be enforceable by, the parties hereto and
                each Indemnified Party, and his or her heirs and
                representatives.

     5.7  Agreement to Defend.  In the event any claim, action, suit,
investigation or other proceeding by any governmental body or other person or
other legal or 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.

     5.8  Accounting Matters.  During the period from the date of this Merger
Agreement through the Effective Time, unless the parties shall otherwise agree
in writing, neither STC nor Camco or any of their respective Subsidiaries shall
take or fail to take any reasonable action which action or failure to act would
knowingly jeopardize the treatment of Camco's combination with Sub as a pooling
of interests for accounting purposes and each of STC and Camco will take all
reasonable steps to permit the Merger to be treated as a pooling of interest for
accounting purposes.

     5.9  Public Announcements.  STC and Camco will agree with each other with
respect to the contents thereof before issuing any press release or otherwise
making any public statements with respect to the transactions contemplated by
this Merger Agreement, except as may be required by applicable law or by
obligations pursuant to any listing agreement with any national securities
exchange or transaction reporting system.

     5.10 Other Actions.  Except as contemplated by this Merger Agreement,
neither STC nor Camco shall, and shall not permit any of its Subsidiaries to,
take or agree or commit to take any 

                                      -37-
<PAGE>
 
action that is reasonably likely to result in any of its respective
representations or warranties hereunder being untrue in any material respect or
in any of the conditions to the Merger set forth in Article VI not being
satisfied.

     5.11 Advice of Changes; SEC Filings.  STC and Camco shall confer on a
regular basis with each other, report on operational matters and promptly advise
each other orally and in writing of any change or event having, or which,
insofar as can reasonably be foreseen, could have, a Material Adverse Effect on
the STC Affiliated Group or Camco, as the case may be.  Camco and STC shall
promptly provide each other (or their respective counsel) copies of all filings
made by such party (or in the case of STC, made by Schlumberger) with the SEC or
any other state or federal Governmental Entity in connection with this Merger
Agreement and the transactions contemplated hereby.

     5.12 Reorganization  It is the intention of STC and Camco that the Merger
will qualify as a reorganization described in Section 368(a)(1)(B) of the Code
(and any comparable provisions of applicable state law).  Neither Camco nor STC
(or any of their respective Subsidiaries) will take or omit to take any action
(whether before, on or after the Closing Date) that would cause the Merger not
to be so treated.  The parties will characterize the Merger as such a
reorganization for purposes of all Returns and other filings.

     5.13 Delivery of Schlumberger Common Stock.  Prior to the Merger, STC will
acquire and will contribute to Sub that number of shares of Schlumberger Common
Stock which Sub is required to deliver pursuant to Section 2.1(c).

     5.14 Employee Matters.

          (a)   Employment. STC and Camco agree that all employees of Camco and
                its Subsidiaries immediately prior to the Effective Time shall
                be employed by the Surviving Corporation immediately after the
                Effective Time (referred to herein during such continuing
                employment as "Continuing Employees").

          (b)   Benefits Accrued at the Effective Time. STC will take, or cause
                the appropriate member of the STC Group (as defined below) to
                take, all actions necessary to preserve and maintain with
                respect to the Camco Benefit Plans in effect at the Effective
                Time, benefits accrued and service credit accrued to the
                Continuing Employees and the Camco Retirees during employment
                with Camco and its Subsidiaries prior to the Effective Time;
                provided, however, that unless otherwise expressly provided in
                this Agreement, nothing contained in this Section 5.14 shall
                preclude any member of the STC Group from amending any such plan
                to cease the accrual of benefits thereunder after the Effective
                Time or terminating any such plan provided such amendment or
                termination does not adversely affect the benefits accrued
                thereunder, if any, at the Effective Time. As used herein, the
                "STC Group" means the Surviving Corporation and all members of
                the STC Affiliated Group.

                                      -38-
<PAGE>
 
          (c)   General Agreement as to Employee Benefit Coverage after the
                Effective Time. Unless otherwise expressly addressed in this
                Section 5.14, this Section 5.14(c) shall govern the obligations
                of the STC Group with respect to employee benefits for
                Continuing Employees and for employees who are eligible for
                retirement benefits attributable to employment with Camco or a
                Camco Affiliate, whether before, at or after the Effective Time
                (referred to herein as "Camco Retirees").

                (i)   Benefit Coverage. STC will take, and cause the appropriate
                      member of the STC Group to take, such actions as are
                      necessary so that for the remainder of the calendar year
                      in which the Effective Time occurs, Continuing Employees
                      and Camco Retirees will be provided with employee benefit
                      plans, programs, policies and arrangements that are no
                      less favorable to such employees and retirees as those
                      provided as of the Effective Time. Thereafter, the STC
                      Group will provide the Continuing Employees and Camco
                      Retirees with benefits that, in the aggregate, are not
                      less favorable than those then provided to Similarly
                      Situated Employees (as defined in the next sentence). As
                      used herein, the phrase "Similarly Situated Employees"
                      means that group of employees (or retirees, as applicable)
                      of the STC Group principally employed in the oil field
                      service operations of the STC Group generally whose job
                      descriptions, working conditions, wage rates and other
                      conditions of employment are (or were) the most similar to
                      those of the Continuing Employees (or the Camco Retirees)
                      or, if there is no such group of employees, a group of
                      employees engaged in the drilling or completing of oil
                      and/or gas wells, all as reasonably determined by STC.

                (ii)  Service Crediting. In the event a STC Group employee
                      benefit plan, program, policy or arrangement is made
                      available to Continuing Employees or Camco Retirees, all
                      periods of service with Camco and its Subsidiaries and any
                      other entity that is within the same controlled group as
                      Camco under Section 414(b), (c), (m) or (o) of the Code or
                      Section 4001 of ERISA (the "Camco Controlled Group"), will
                      be credited to such employees or retirees for all purposes
                      (other than accrual of benefits), including vesting and
                      the eligibility to participate and receive benefits for
                      which a specified period of service is required under such
                      STC Group employee benefit plan, program, policy or
                      arrangement.

               (iii)  Certain Welfare Plan Provisions.  STC will take, or cause
                      the appropriate member of the STC Group to take, such
                      actions as are necessary so that Continuing Employees and
                      Camco Retirees shall not be subject to preexisting
                      condition exclusions or waiting periods

                                      -39-
<PAGE>
 
                    for welfare benefit plan coverages (except to the extent so
                    subject prior to the Effective Time) under any STC Group
                    welfare benefit plan that is made available to them and
                    shall receive full credit for any copayments and deductibles
                    already incurred under the comparable plan of Camco and its
                    Subsidiaries during the applicable plan year in which the
                    Effective Time occurs.

          (d)  Specific Agreements as to Employee Benefit Coverage after the
               Effective Time. The following provisions shall modify the
               obligations of the STC Group under Section 5.14(c) to the extent
               set forth below.

               (i)  Severance Policies or Plans. For the period commencing on
                    the Effective Time and ending on December 31, 1999, a
                    Continuing Employee who is not a party to an individual
                    agreement providing for the payment of severance benefits
                    shall be provided with continued coverage under the Camco
                    Benefit Plan providing for severance benefit coverage to the
                    Continuing Employee at the Effective Time or, if any member
                    of the STC Group maintains a severance plan that would
                    otherwise cover the Continuing Employee by its terms and
                    such plan would provide greater benefits to the Continuing
                    Employee, the employee instead shall be provided with
                    coverage under such superior STC Group severance plan while
                    eligible for such plan during the period commencing on the
                    Effective Time and ending on December 31, 1999. From and
                    after January 1, 2000, for as long as the STC Group
                    maintains a severance plan for its Similarly Situated
                    Employees, a Continuing Employee who is not a party to an
                    individual severance agreement shall be provided with
                    coverage under the STC Group severance plan. Continuing
                    Employees will accrue severance plan credit at the same rate
                    as Similarly Situated Employees and, for this purpose, years
                    of service with the Camco Controlled Group prior to the
                    Effective Time will be credited.

               (ii) Management and Sales Incentive Compensation Programs. The
                    following provisions shall apply to those Camco Benefit
                    Plans that provide for management and sales incentive
                    compensation and that are in effect at the Effective Time.
                    In the event that a participant in an incentive compensation
                    program ceases to be an employee for any reason other than
                    termination for cause or voluntary resignation, or in the
                    event that a participant is reassigned to a business unit
                    which is no longer within the Camco incentive compensation
                    measurements, the participant will receive an incentive
                    compensation payment as measured against the plan at the end
                    of the prior quarter and based on an annual award prorated
                    for the fraction of the year up to the change in employment
                    status. In the event that a reorganization results in a

                                      -40-
<PAGE>
 
                      business unit being removed from the Camco incentive
                      compensation measurements, the measurements of the plan
                      will be adjusted to eliminate the objectives of that
                      business unit from the performance evaluation for
                      calculation of incentive compensation payments for the
                      remaining business units. Voluntary resignation shall not
                      include termination under Section 2(a) of a Camco
                      Executive Severance Agreement.

               (iii)  Qualified Defined Contribution Plans.  No Camco Benefit
                      Plan that is a qualified defined contribution pension plan
                      shall be terminated in a manner that would generate a
                      distributable event to a participant (unless the
                      corresponding plan(s) maintained by the STC Group for
                      Similarly Situated Employees are also so terminated). The
                      STC Group may make employer contributions under qualified
                      defined contribution plans for Continuing Employees at a
                      rate or level that differ from the contributions made
                      under such plans for Similarly Situated Employees based on
                      the relative profits of the STC Group operating unit or
                      division employing Continuing Employees as compared to the
                      profits of the STC Group operating unit or division
                      employing Similarly Situated Employees.
 
               (iv)   Qualified Defined Benefit Plans.

                         (A) Freeze of Benefit Accruals.  Benefit accruals by a
                      participant in any Camco Benefit Plan that is a qualified
                      defined benefit pension plan (a "Camco Defined Benefit
                      Plan") may be frozen by a member of the STC Group at any
                      time on or after the close of the calendar year in which
                      the Effective Time occurs, provided that the definition
                      for compensation includes covered earnings up to the date
                      the plan is frozen and further provided that Continuing
                      Employees then commence accruing a benefit under a
                      qualified defined benefit pension plan sponsored by a
                      member of the STC Group (a "STC Group Defined Benefit
                      Plan") if Similarly Situated Employees are then accruing a
                      benefit under such a plan. An ad hoc benefit adjustment
                      shall be made to the frozen benefit attributable to the
                      Camco Defined Benefit Plan to the extent such an
                      adjustment is made under a STC Group Defined Benefit Plan.

                         (B) Service Crediting.  In the event that the benefit
                      accrual of a Continuing Employee under a Camco Defined
                      Benefit Plan is frozen, or a Camco Defined Benefit Plan is
                      merged into a STC Group Defined Benefit Plan, the
                      following service crediting provisions (in addition to any
                      service crediting provisions of Section 5.14(c) that are
                      not inconsistent with this paragraph) shall apply to any
                      benefit 

                                      -41-
<PAGE>
 
                      accrued after the Effective Time under such STC Group
                      Defined Benefit Plan: Continuing Employees will be
                      credited with service equal to the employees' accrued
                      vesting service under the Camco Defined Benefit Plan for
                      periods prior to the Effective Time, for purposes of
                      vesting, eligibility to participate, eligibility for
                      enhanced levels of benefit accrual and eligibility for
                      early retirement.

                         (C) Early Retirement.  Notwithstanding the foregoing,
                      the early retirement provisions of the Camco Defined
                      Benefit Plan that is merged into a STC Group Defined
                      Benefit Plan or under which the accrued benefit of a
                      Continuing Employee is frozen shall continue to apply to
                      the benefit accrued under the provisions of the Camco
                      Defined Benefit Plan rather than the early retirement
                      provisions of the STC Group Defined Benefit Plan. To the
                      extent that a Continuing Employee commences receipt of an
                      early retirement benefit under a STC Group Defined Benefit
                      Plan prior to the time that the benefit accrued under a
                      Camco Defined Benefit Plan would be payable, the benefit
                      accrued under the Camco Defined Benefit Plan shall
                      nevertheless commence being paid at the same time as the
                      benefit under the STC Group Defined Benefit Plan, but
                      shall be actuarially reduced to reflect such early
                      commencement.

               (v)    Retiree Medical Coverage.  For so long as the STC Group
                      provides retiree medical coverage to its eligible retiring
                      Similarly Situated Employees, retiree medical coverage
                      under a Camco Benefit Plan or a plan maintained by a
                      member of the STC Group shall be made available to
                      eligible Camco Retirees. The STC Group may impose
                      eligibility criteria of attainment of age 60 during
                      employment with 20 years of service (within the meaning of
                      the vesting service definition of the Camco Benefit Plan
                      that is a qualified defined benefit pension plan and that
                      covers the employee at the Effective Time) for such
                      coverage, but no more restrictive eligibility criteria
                      unless such more restrictive criteria also applies to
                      Similarly Situated Employees. However, a Continuing
                      Employee who, at the Effective Time, is age 55 and has
                      accrued 15 or more years of service shall be eligible,
                      upon an involuntary termination of employment entitling
                      the employee to benefits under a STC Group or Camco
                      severance plan or agreement, for the same retiree medical
                      coverage provided to other Camco Retirees, notwithstanding
                      the age and service eligibility criteria otherwise
                      applicable for retiree medical coverage. Camco Retirees
                      may be required to pay premiums for retiree medical
                      coverage up to, but not in excess of, the highest premium
                      permitted to be charged for such continuation coverage
                      under the Consolidated Omnibus Budget

                                      -42-
<PAGE>
 
                        Reconciliation Act of 1986 unless higher premiums also
                        are required from Similarly Situated Employees who
                        retire.

               (vii)    U.K. Performance Related Pay (PRP) Plans. Camco Benefit
                        Plans that are PRP plans will not be discontinued prior
                        to the close of the calendar year in which the Effective
                        Time occurs.

               (viii)   Health Care and Dependent Care Flexible Spending
                        Accounts. Camco Benefit Plans that are flexible spending
                        accounts within the meaning of Code Section 125 and the
                        regulations thereunder will not be discontinued prior to
                        the close of the calendar year in which the Effective
                        Time occurs.

          (e)  Vacation.  With respect to the calendar year in which the
               Effective Time occurs, a Continuing Employee will be permitted to
               take vacation after the Effective Time (in accordance with the
               STC Group vacation policies generally applicable to Similarly
               Situated Employees) for accrued and unused vacation days
               (determined under the vacation policies of Camco) that such
               Continuing Employee is entitled to use for the calendar year in
               which the Effective Time occurs.  Continuing Employees shall
               receive pay in lieu of such unused vacation time at the end of
               the calendar year in which the Effective Time occurs.  In
               addition, with respect to vacation time that is earned during the
               calendar year in which the Effective Time occurs (which may be
               taken in the subsequent calendar year under the vacation policies
               of Camco) (the "Vacation Accrual"), the Vacation Accrual shall,
               on the first day of such subsequent calendar year, be credited to
               the Continuing Employees' vacation credit accounts under the
               applicable STC Group vacation policy for the calendar year
               following the Effective Time, up to the maximum allowed under the
               vacation policies of the STC Group, and the Continuing Employees
               will be paid for any Vacation Accrual in excess of such maximum.
               Continuing Employees will, in addition to having their Vacation
               Accrual credited as of the first day of the calendar year
               following the Effective Time, accrue vacation time for calendar
               years commencing on and after the Effective Time at the same rate
               as Similarly Situated Employees and, for this purpose, years of
               service with the Camco Controlled Group prior to the Effective
               Time will be credited.  Notwithstanding the foregoing, the total
               vacation time credited to a Continuing Employee's vacation credit
               account for the calendar year following the Effective Time (both
               by the Vacation Accrual credit made at the beginning of the year
               and vacation accrued thereafter) shall not exceed the maximum
               allowed under the applicable vacation policies of the STC Group.

          (f)  Retention Bonus Program. Notwithstanding the provisions of
               Section 4.1(h), STC agrees that Camco may establish a retention
               bonus program for the

                                      -43-
<PAGE>
 
               benefit of certain named Continuing Employees ("Eligible
               Employees"), subject to the following limitations: The number of
               Eligible Employees shall not exceed 100. The total amount of
               retention bonuses potentially payable under the program shall not
               exceed $5 million. A retention bonus will only be paid to an
               Eligible Employee who remains in the employ of the STC Group
               until the first to occur of (i) the first anniversary of the
               Effective Time or (ii) the date such Eligible Employee's
               employment is involuntarily terminated other than for cause by
               any member of the STC Group. Documentation of the program
               (including the names and titles of the Eligible Employees and the
               amount of the retention bonus potentially payable to each
               Eligible Employee) shall be subject to the comment and advance
               approval of STC, which approval shall not unreasonably be
               withheld.

          (g)  Collective Bargaining Exception. The provisions of this Section
               5.14 will not apply to Continuing Employees or Camco Retirees who
               are covered by a collective bargaining agreement to the extent
               such provisions are inconsistent with the terms of any applicable
               collective bargaining agreement.

          (h)  Transferred Employees. A Continuing Employee who is transferred
               after the Effective Time to employment with an operating unit,
               subsidiary or affiliate of the STC Group other than the Surviving
               Corporation or any of its subsidiaries shall participate in the
               employee benefit plans, programs, policies and arrangements that
               are maintained by said employing entity for its employees.


                                  ARTICLE VI
                             CONDITIONS PRECEDENT

     6.1  Conditions to Each Party's Obligation to Effect the Merger.  The
respective obligation of each party to effect the Merger shall be subject to the
satisfaction prior to the Closing Date of the following conditions:

          (a)   Camco Stockholder Approval. This Merger Agreement and the Merger
                shall have been approved and adopted by the affirmative vote of
                the holders of a majority of the outstanding shares of Camco
                Common Stock entitled to vote thereon.

          (b)   NYSE Listing.  The shares of Schlumberger Common Stock issuable
                to Camco stockholders pursuant to this Merger Agreement shall
                have been authorized for listing on the NYSE upon official
                notice of issuance.

          (c)   Other Approvals.  The waiting period applicable to the
                consummation of the Merger under the HSR Act shall have expired
                or been terminated and all

                                      -44-
<PAGE>
 
                filings required to be made prior to the Effective Time with,
                and all consents, approvals, permits and authorizations required
                to be obtained prior to the Effective Time from, any
                Governmental Entity in connection with the execution and
                delivery of this Merger Agreement and the consummation of the
                transactions contemplated hereby shall have been made or
                obtained (as the case may be), except where the failure to
                obtain such consents, approvals, permits and authorizations
                would not be reasonably likely to result in a Material Adverse
                Effect on the STC Affiliated Group (assuming the Merger has
                taken place) or to materially adversely affect the consummation
                of the Merger.

          (d)   S-4. The S-4 shall have become effective under the Securities
                Act and shall not be the subject of any stop order or
                proceedings seeking a stop order.

          (e)   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 (an "Injunction") preventing the consummation of the
                Merger shall be in effect; provided, however, that prior to
                invoking this condition, each party shall have complied fully
                with its obligations under Section 5.7 hereof and, in addition,
                shall use all reasonable efforts to have any such decree,
                ruling, injunction or order vacated, except as otherwise
                contemplated by this Merger Agreement.

          (f)   Pooling Accounting. Camco and STC or a designated member of the
                STC Affiliated Group shall have received a letter from each of
                Arthur Andersen LLP and Price Waterhouse LLP, dated as of a date
                within two days prior to the Closing Date, in form and substance
                satisfactory to the respective receiving persons, to the effect
                that, in accordance with generally accepted accounting
                principles and the applicable rules and regulations of the SEC,
                Schlumberger and Camco are each eligible to be a party to a
                Merger accounted for as a "pooling of interests".

     6.2  Conditions of Obligations of STC and Sub.  The obligations of STC 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 STC.

          (a)   Representations and Warranties. Each of the representations and
                warranties of Camco set forth in this Merger Agreement shall be
                true and correct in all material respects as of the date of this
                Merger Agreement and (except to the extent such representations
                and warranties speak as of an earlier date) as of the Closing
                Date as though made on and as of the Closing Date, except where
                the failure to be so true and correct (without giving effect to
                the individual materiality thresholds otherwise contained in
                Section 3.1 hereof) would not have a Material Adverse Effect on
                Camco (such that the aggregate of the

                                      -45-
<PAGE>
 
                Material Adverse Effect on Camco hereunder exceeds $200 million)
                and STC shall have received a certificate dated the Closing Date
                on behalf of Camco by the chief executive officer and chief
                financial officer of Camco to that effect.

          (b)   Performance of Obligations of Camco. Camco shall have performed
                in all material respects all obligations required to be
                performed by it under this Merger Agreement at or prior to the
                Closing Date.

          (c)   Letters from Camco Directors and Executive Officers. STC shall
                have received from each director and executive officer of Camco
                an executed copy of each of the agreements described in Section
                5.4.

          (d)   Certifications and Opinion.  Camco shall have furnished STC
                with:

               (i) a certified copy of a resolution or resolutions duly adopted
          by the Board of Directors of Camco 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
          stockholders of Camco;

               (ii) a certified copy of a resolution or resolutions duly adopted
          by the holders of a majority of the outstanding shares of Camco Common
          Stock approving the Merger and the transactions contemplated hereby;

               (iii)  a favorable opinion, dated the Closing Date, in customary
          form and substance, of Ronald R. Randall, Esquire, General Counsel of
          Camco, dated the Closing Date to the effect that:

                    (A) Camco is a corporation duly incorporated, validly
               existing and in good standing under the laws of the State of
               Delaware and has corporate power to own its properties and assets
               and to carry on its business as presently conducted and as
               described in the Registration Statement;

                    (B) Camco has the requisite corporate power to effect the
               Merger as contemplated by this Merger Agreement; the execution
               and delivery of this Merger Agreement did not, and the
               consummation of the Merger will not, violate any provision of
               Camco's Certificate of Incorporation or Bylaws; and upon the
               filing by the Surviving Corporation of the Certificate of Merger,
               the Merger shall become effective;

                    (C) Each of Camco's Significant Subsidiaries is a
               corporation duly incorporated, validly existing and in good
               standing under the laws of its jurisdiction of incorporation, and
               has corporate power to own its properties and assets and to carry
               on its business as presently conducted; and

                                      -46-
<PAGE>
 
                    (D) The Board of Directors of Camco has taken all action
               required by the DGCL and its Certificate of Incorporation or its
               Bylaws to approve the Merger and to authorize the execution and
               delivery of this Merger Agreement and the transactions
               contemplated hereby; the Board of Directors and the stockholders
               of Camco have taken all action required by the DGCL and Camco's
               Certificate of Incorporation and By-Laws to authorize the Merger
               in accordance with the terms of this Merger Agreement; and this
               Merger Agreement is a valid and binding agreement of Camco
               enforceable in accordance with its terms, except as such
               enforceability may be limited by bankruptcy, insolvency,
               reorganization, moratorium or other similar laws or judicial
               decisions now or hereafter in effect relating to creditors'
               rights generally or governing the availability of equitable
               relief.

          (e)  Tax Opinion.  STC or a designated member of the STC Affiliated
               Group shall have received an opinion, satisfactory to the
               receiving person, dated on or about the date that is two days
               prior to the date the Proxy Statement is first mailed to
               stockholders of Camco, of Baker & Botts, L.L.P., 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, Schlumberger, STC and Camco will each
               be a party to that reorganization within the meaning of Section
               368(b) of the Code and no gain or loss will be recognized by
               Schlumberger, STC or Sub as a result of the Merger, which opinion
               shall not have been withdrawn or modified in any material
               respect. A second opinion, reconfirming the foregoing and dated
               as of the Closing Date, satisfactory to the receiving person,
               shall have been issued to STC or the designated member of the STC
               Affiliated Group. In rendering such opinions, such counsel may
               receive and rely upon representations of fact contained in
               certificates of Schlumberger, STC, Sub and Camco.

          (f)  Transaction Agreement.  Each of the obligations required to be
               performed by Camco under the Transaction Agreement of even date
               herewith between Schlumberger and Camco (the "Transaction
               Agreement") at or prior to the Delivery Date (as defined in the
               Transaction Agreement) shall have been performed in all material
               respects and each of the conditions set forth in Article V of the
               Transaction Agreement shall have been satisfied or waived as set
               forth therein.

     6.3  Conditions of Obligations of Camco.  The obligation of Camco to effect
the Merger is subject to the satisfaction of the following conditions, any or
all of which may be waived in whole or in part by Camco:

          (a) Representations and Warranties. Each of the representations and
              warranties of STC and Sub set forth in this Merger Agreement shall
              be true and correct

                                      -47-
<PAGE>
 
              in all material respects as of the date of this Merger Agreement
              and (except to the extent such representations and warranties
              speak as of an earlier date) as of the Closing Date as though made
              on and as of the Closing Date, except where the failure to be so
              true and correct (without giving effect to the individual
              materiality thresholds otherwise contained in Section 3.2 hereof)
              would not have a Material Adverse Effect on the STC Affiliated
              Group (such that the aggregate of the Material Adverse Effect on
              the STC Affiliated Group hereunder exceeds $400 million) and Camco
              shall have received a certificate dated the Closing Date by a duly
              authorized officer of STC to that effect.

          (b) Performance of Obligations of STC and Sub. STC and Sub shall have
              performed in all material respects all obligations required to be
              performed by them under this Merger Agreement at or prior to the
              Closing Date.

          (c) Certifications and Opinion.  STC shall have furnished Camco with:

              (i) a certified copy of a resolution or resolutions duly adopted
          by the Board of Directors or a duly authorized committee thereof of
          STC and Sub approving this Merger Agreement and consummation of the
          Merger and the transactions contemplated hereby;

              (ii) a favorable opinion, dated the Closing Date, in customary
          form and substance, of David S. Browning, Esquire, General Counsel of
          Schlumberger, to the effect that:

                    (A) Each of STC and Sub is a corporation duly incorporated,
               validly existing and in good standing under the laws of its
               jurisdiction of incorporation and has corporate power to own its
               properties and assets and to carry on its business as presently
               conducted and as described in the Registration Statement; STC and
               Sub each has the requisite corporate power to effect the Merger
               as contemplated by this Merger Agreement; the execution and
               delivery of this Merger Agreement did not, and the consummation
               of the Merger will not, violate any provision of STC's or Sub's
               Certificate of Incorporation or Bylaws; and upon the filing by
               the Surviving Corporation of the Certificate of Merger, the
               Merger shall become effective;

                    (B) The respective Board of Directors of STC and Sub have
               taken all action required under its jurisdiction of
               incorporation, its Certificate of Incorporation or its Bylaws to
               authorize the execution and delivery of this Merger Agreement and
               the transactions contemplated hereby, and to authorize the Merger
               in accordance with the terms of this Merger Agreement; and this
               Merger Agreement is a valid and binding agreement of STC and Sub

                                      -48-
<PAGE>
 
               enforceable in accordance with its terms, except as such
               enforceability may be limited by bankruptcy, insolvency,
               reorganization, moratorium or other similar laws or judicial
               decisions now or hereafter in effect relating to creditors'
               rights generally or governing the availability of equitable
               relief.

                    (C) The shares of Schlumberger Common Stock to be delivered
               to the holders of Camco Common Stock pursuant to Article II are
               duly authorized and when issued and delivered as contemplated by
               this Merger Agreement will be legally and validly issued and
               fully paid and nonassessable and no stockholders of Schlumberger
               shall have any preemptive rights with respect thereto either
               pursuant to the organizational documents of Schlumberger or under
               applicable law of the jurisdiction of Schlumberger's
               organization.

          (d)  Tax Opinion.  Camco shall have received an opinion, satisfactory
               to Camco, dated on or about the date that is two days prior to
               the date the Proxy Statement is first mailed to stockholders of
               Camco, a copy of which will be furnished to STC, of Fulbright &
               Jaworski L.L.P., 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,
               Schlumberger, STC and Camco will each be a party to that
               reorganization within the meaning of Section 368(b) of the Code,
               no gain or loss will be recognized by the stockholders of Camco
               as a result of the Merger upon the conversion of shares of Camco
               Common Stock into shares of Schlumberger Common Stock and no gain
               or loss will be recognized by Camco as a result of the Merger,
               which opinion shall not have been withdrawn or modified in any
               material respect. A second opinion, reconfirming the foregoing
               and dated as of the Closing Date, shall have been issued to Camco
               and a copy shall have been provided to STC. In rendering such
               opinions, such counsel may receive and rely upon representations
               of fact contained in certificates of Schlumberger, STC, Sub and
               Camco.

          (e)  Fairness Opinion. Morgan Stanley & Co. Incorporated has not
               revoked, modified or changed its opinion referred to in Section
               3.1(p) in any manner adverse to the holders of the Common Stock
               of Camco.

          (f)  Transaction Agreement. Each of the obligations required to be
               performed by Schlumberger under the Transaction Agreement at or
               prior to the Delivery Date (as defined in the Transaction
               Agreement) shall have been performed in all material respects and
               each of the conditions set forth in Article V of the Transaction
               Agreement shall have been satisfied or waived as set forth
               therein.

                                      -49-
<PAGE>
 
                                  ARTICLE VII
                           TERMINATION AND AMENDMENT

     7.1  Termination.  This Merger Agreement may be terminated and the Merger
may be abandoned at any time prior to the Effective Time, whether before or
after approval of the matters presented in connection with the Merger by the
stockholders of Camco:

          (a)   by mutual written consent of Camco and STC, or by mutual action
                of their respective Boards of Directors;

          (b)   by either Camco or STC if (i) the Merger shall not have been
                consummated by December 31, 1998 (provided that the right to
                terminate this Merger Agreement under this clause (i) shall not
                be available to any party whose breach of any representation or
                warranty or failure to fulfill any covenant or agreement under
                this Merger Agreement has been the cause of or resulted in the
                failure of the Merger to occur on or before such date); (ii) any
                court of competent jurisdiction, or some other governmental body
                or regulatory authority shall have issued an order, decree or
                ruling or taken any other action permanently restraining,
                enjoining or otherwise prohibiting the Merger and such order,
                decree, ruling or other action shall have become final and
                nonappealable; or (iii) any required approval of the
                stockholders of Camco shall not have been obtained by reason of
                the failure to obtain the required vote upon a vote held at a
                duly held meeting of stockholders or at any adjournment thereof;

          (c)   by STC if (i) for any reason Camco fails to call and hold a
                stockholders' meeting for the purpose of voting upon this Merger
                Agreement and the Merger by December 31, 1998; (ii) Camco shall
                have failed to comply in any material respect with any of the
                covenants or agreements contained in this Merger Agreement to be
                complied with or performed by Camco at or prior to such date of
                termination (provided such breach has not been cured within 30
                days following receipt by Camco of notice of such breach and is
                existing at the time of termination of this Merger Agreement);
                (iii) any representations and warranties of Camco contained in
                this Merger Agreement shall not have been true when made
                (provided such breach has not been cured within 30 days
                following receipt by Camco of notice of such breach and is
                existing at the time of termination of this Merger Agreement) or
                on and as of the Effective Time as if made on and as of the
                Effective Time (except to the extent it relates to a particular
                date), except where the failure to be so true and correct
                (without giving effect to the individual materiality thresholds
                otherwise contained in Section 3.1 hereof) would not have a
                Material Adverse Effect on Camco such that the aggregate of the
                Material Adverse Effect on Camco exceeds $200 million; (iv) the
                Board of Directors of Camco or any committee thereof (A)
                withdraws, modifies or changes its

                                      -50-
<PAGE>
 
                recommendation of this Merger Agreement or the Merger in a
                manner adverse to the STC Affiliated Group or shall have
                resolved to do any of the foregoing, or (B) approves or
                recommends, or proposes to approve or recommend, any Acquisition
                Proposal; or (v) the Transaction Agreement shall have been
                terminated by Camco;

          (d)   by Camco if (i) STC or Sub shall have failed to comply in any
                material respect with any of the covenants or agreements
                contained in this Merger Agreement to be complied with or
                performed by it at or prior to such date of termination
                (provided such breach has not been cured within 30 days
                following receipt by STC of notice of such breach and is
                existing at the time of termination of this Merger Agreement);
                (ii) any representations and warranties of STC or Sub contained
                in this Merger Agreement shall not have been true when made
                (provided such breach has not been cured within 30 days
                following receipt by STC of notice of such breach and is
                existing at the time of termination of this Merger Agreement) or
                on and as of the Effective Time as if made on and as of the
                Effective Time (except to the extent it relates to a particular
                date), except where the failure to be so true and correct
                (without giving effect to the individual materiality thresholds
                otherwise contained in Section 3.2 hereof) would not have a
                Material Adverse Effect on the STC Affiliated Group such that
                the aggregate of the Material Adverse Effect on the STC
                Affiliated Group exceeds $400 million; (iii) pursuant to Section
                4.2(b) or (iv) the Transaction Agreement shall have been
                terminated by Schlumberger.

     7.2  Effect of Termination.

          (a)   In the event of termination of this Merger Agreement by either
                Camco or STC as provided in Section 7.1, this Merger Agreement
                shall forthwith become void and there shall be no liability or
                obligation on the part of Camco or any member of the STC
                Affiliated Group except (i) with respect to this Section 7.2,
                the third and fourth sentences of Section 5.1 and Section 8.1,
                and (ii) to the extent that such termination results from the
                willful breach by a party hereto of any of its representations
                or warranties or of any of its covenants or agreements, in each
                case, as set forth in this Merger Agreement except as provided
                in Section 8.9.

          (b)   If STC or Camco, as applicable, terminates this Merger Agreement
                pursuant to Section 4.2(b) or Section 7.1(c)(iv)(B), Camco shall
                immediately pay STC a fee of $90 million (the "Termination Fee")
                in cash or by wire transfer of immediately available funds to an
                account designated by STC.

          (c)   If STC terminates this Agreement pursuant to Section
                7.1(c)(iv)(A), Camco shall owe to STC the Termination Fee if
                Camco consummates a transaction

                                      -51-
<PAGE>
 
                pursuant to an Acquisition Proposal on or prior to September 30,
                1999. The Termination Fee payable to STC under this Section
                7.2(c), if any, shall be payable in cash or by wire transfer of
                immediately available funds to an account designated by STC on
                the consummation of the transaction, if any, referred to above.

          (d)   Camco also agrees to pay to STC the Termination Fee if (i) after
                the date hereof and before the termination of this Merger
                Agreement, an Acquisition Proposal shall have been made and
                publicly announced by any party, (ii) the stockholders of Camco
                shall not have approved the Merger and (iii) on or prior to
                September 30, 1999, Camco consummated a transaction pursuant to
                an Acquisition Proposal. The Termination Fee payable under this
                Section 7.2(d) shall be payable on the consummation of such
                transaction.

     7.3  Amendment.  This Merger Agreement may be amended by the parties
hereto, by action taken or authorized by their respective Boards of Directors,
at any time before or after approval of the matters presented in connection with
the Merger by the stockholders of Camco, but, after any such approval, no
amendment shall be made which by law requires further approval by such
stockholders without such further approval.  This Merger Agreement may not be
amended except by an instrument in writing signed on behalf of each of the
parties hereto.

     7.4  Extension; Waiver.  At any time prior to the Effective Time, the
parties hereto, by action taken or authorized by their respective Boards of
Directors, may, to the extent legally allowed: (i) extend the time for the
performance of any of the obligations or other acts of the other parties hereto;
(ii) waive any inaccuracies in the representations and warranties contained
herein or in any document delivered pursuant hereto; and (iii) waive compliance
with any of the agreements or conditions contained herein.  Any agreement on the
part of a party hereto to any such extension or waiver shall be valid only if
set forth in a written instrument signed on behalf of such party.

                                 ARTICLE VIII
                              GENERAL PROVISIONS

     8.1  Payment of Expenses.  Each party hereto shall pay its own expenses
incident to preparing for entering into and carrying out this Merger Agreement
and the consummation of the transactions contemplated hereby, whether or not the
Merger shall be consummated.  In the event the Agreement is terminated for any
reason, STC shall reimburse Camco up to $5 million for the actual cost of
Camco's employee retention program.

     8.2  Nonsurvival of Representations, Warranties and Agreements.  None of
the representations, warranties and agreements in this Merger Agreement or in
any instrument delivered pursuant to this Merger Agreement shall survive the
Effective Time and any liability for breach or violation thereof shall terminate
absolutely and be of no further force and effect at and as of the Effective
Time, except for the agreements contained in Sections 2.1, 2.2, 5.5, 5.6, 5.12,
5.13 and 7.2 and this Article VIII and the agreements delivered pursuant to
Section 5.4.  The Confidentiality 

                                      -52-
<PAGE>
 
Agreements shall survive the execution and delivery of this Merger Agreement,
and the provisions of the Confidentiality Agreements shall apply to all
information and material delivered hereunder.

     8.3  Knowledge.  When used herein, the terms "knowledge", "known to", "best
knowledge" and terms of similar meaning shall mean the actual knowledge of (a)
with respect to Camco, (i) the Chief Financial Officer, the Chief Accounting
Officer, and the General Counsel and Secretary of Camco as of the date of this
Agreement and (ii) all of officers of Camco as of the Closing Date and (b) with
respect to the STC Affiliated Group, (A) (1) the President and (2) the Vice
President and Secretary of STC, as of the date of this Agreement and (B) all of
the officers of STC as of the Closing Date.

     8.4  Notices.  Any notice or communication required or permitted hereunder
shall be in writing and either delivered personally, telegraphed or telecopied
or sent by certified or registered mail, postage prepaid, and shall be deemed to
be given, dated and received when so delivered personally, telegraphed or
telecopied or, if mailed, five business days after the date of mailing to the
following address or telecopy number, or to such other address or addresses as
such person may subsequently designate by notice given hereunder:

          (a)       if to STC or Sub, to:
                    277 Park Avenue
                    New York, New York 10172
                    Attention: David S. Browning, Esquire         
                    Fax: (212) 350-9457

                    with a copy to:
 
                    Baker & Botts, L.L.P.
                    910 Louisiana, Suite 3000
                    Houston, Texas 77002
                    Attention: Moulton A. Goodrum, Esquire
                    Fax: (713) 229-1522

               and (b) if to Camco, to:

                    Camco International, Inc.
                    7030 Ardmore
                    Houston, Texas 77054
                    Attention: Ronald R. Randall, Esquire         
                    Fax: (713) 749-5625

                                      -53-
<PAGE>
 
               with a copy to:

                    Fulbright & Jaworski LLP
                    1301 McKinney, Suite 5100
                    Houston, Texas 77010
                    Attention: Michael C. Conlon, Esquire         
                    Fax: (713) 651-5246


     8.5  Interpretation.  When a reference is made in this Merger Agreement to
Sections, such reference shall be to a Section of this Merger Agreement unless
otherwise indicated.  The table of contents, glossary of defined terms and
headings contained in this Merger Agreement are for reference purposes only and
shall not affect in any way the meaning or interpretation of this Merger
Agreement.  Whenever the word "include," "includes" or "including" is used in
this Merger Agreement, it shall be deemed to be followed by the words "without
limitation."  The phrase "made available" in this Merger Agreement shall mean
that the information referred to has been made available if requested by the
party to whom such information is to be made available.

     8.6  Counterparts.  This Merger Agreement may be executed in two or more
counterparts, all of which shall be considered one and the same agreement, and
shall become effective when two or more counterparts have been signed by each of
the parties and delivered to the other parties, it being understood that all
parties need not sign the same counterpart.

     8.7  Entire Agreement; No Third-Party Beneficiaries.  This Merger Agreement
(together with the Confidentiality Agreements, the Transaction Agreement and any
other documents and instruments referred to herein) (a) constitutes the entire
agreement and supersedes all prior agreements and understandings, both written
and oral, among the parties with respect to the subject matter hereto and (b)
except as provided in Section 5.6, is not intended to confer upon any person
other than the parties hereto any rights or remedies hereunder.

     8.8  Governing Law.  This Merger Agreement shall be governed and construed
in accordance with the laws of the State of Delaware, without giving effect to
the principles of conflicts of law thereof.

     8.9  No Remedy in Certain Circumstances.  Each party agrees that, should
any court or other competent authority hold any provision of this Merger
Agreement or part hereof to be null, void or unenforceable, or order any party
to take any action inconsistent herewith or not to take an action consistent
herewith or required hereby, the validity, legality and enforceability of the
remaining provisions and obligations contained or set forth herein shall not in
any way be affected or impaired thereby, unless the foregoing inconsistent
action or the failure to take an action constitutes a material breach of this
Merger Agreement or makes the Merger Agreement impossible to perform in which
case this Merger Agreement shall terminate pursuant to Article VII hereof.
Except as otherwise contemplated by this Merger Agreement, to the extent that a
party hereto took an action inconsistent herewith or failed to take action
consistent herewith or required hereby 

                                      -54-
<PAGE>
 
pursuant to an order or judgment of a court or other competent authority, such
party shall not incur any liability or obligation unless such party breached its
obligations under Section 5.3 hereof or did not in good faith seek to resist or
object to the imposition or entering of such order or judgment.

     8.10 Assignment.  Neither this Merger Agreement nor any of the rights,
interests or obligations hereunder shall be assigned by any of the parties
hereto (whether by operation of law or otherwise) without the prior written
consent of the other parties, except that Sub may assign, in its sole
discretion, any or all of its rights, interests and obligations hereunder to any
newly formed direct or indirect wholly owned Subsidiary of STC.  Subject to the
preceding sentence, this Merger Agreement will be binding upon, inure to the
benefit of and be enforceable by the parties and their respective successors and
assigns.

     8.11 Enforcement of the Agreement.  The parties agree that irreparable
damage would occur in the event that any of the provisions of this Merger
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 Merger Agreement and
to enforce specifically the terms and provisions hereof in any court of the
United States located in the State of Delaware or in the Chancery Court of the
State of Delaware, 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 or state
court sitting in Wilmington, Delaware 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 a Federal or state court sitting in
Wilmington, Delaware.

                                      -55-
<PAGE>
 
          IN WITNESS WHEREOF, each party has caused this Merger Agreement to be
signed by its respective officers thereunto duly authorized, all as of the date
first written above.


                              SCHLUMBERGER TECHNOLOGY CORPORATION



                              By:     /s/Arthur Lindenauer
                                   ----------------------------------- 
                                   Arthur Lindenauer
                                   President

                              SCHLUMBERGER OFS, INC.



                              By:     /s/Arthur Lindenauer
                                   ----------------------------------- 
                                   Arthur Lindenauer
                                   President

                              CAMCO INTERNATIONAL, INC.



                              By:     /s/ Gilbert H. Tausch
                                   ----------------------------------- 
                                   Gilbert H. Tausch
                                   President and Chief Executive Officer

<PAGE>
 
                                                                    EXHIBIT 10.1

                             TRANSACTION  AGREEMENT

                                    between

                              SCHLUMBERGER LIMITED

                                      and

                            CAMCO INTERNATIONAL INC.


                           Dated as of June 18, 1998
<PAGE>
 
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                               Page

<S>                                                                                                              <C>
ARTICLE I             DEFINITIONS.................................................................................1

ARTICLE II            DELIVERY, REGISTRATION AND LISTING OF SCHLUMBERGER
                      STOCK.......................................................................................4
         2.1          Delivery of Schlumberger Common Stock.......................................................4
         2.2          Preparation of S-4 and the Proxy Statement..................................................4
         2.3          Authorization for Shares and Stock Exchange Listing.........................................4

ARTICLE III           REPRESENTATIONS AND WARRANTIES..............................................................5
         3.1          Representations and Warranties of Camco.....................................................5
                      (a)  Authority; No Violations; Consents and Approvals.......................................5
                      (b)  Litigation.............................................................................7
                      (c)  Incorporation by Reference.............................................................7
         3.2          Representations and Warranties of Schlumberger.  ...........................................7
                      (a)  Organization, Standing and Power.......................................................7
                      (b)  Capital Structure......................................................................7
                      (c)  Authority; No Violations, Consents and Approvals.......................................8
                      (d)  SEC Documents.........................................................................10
                      (e)  Information Supplied..................................................................10
                      (f)  Absence of Certain Changes or Events..................................................11
                      (g)  No Undisclosed Material Liabilities...................................................11
                      (h)  Litigation............................................................................11
                      (i)  No Vote Required......................................................................12
                      (j)  Accounting Matters....................................................................12
                      (k)  Beneficial Ownership of Camco Common Stock............................................12
                      (l)  Material Contracts and Agreements.....................................................12

ARTICLE IV            ADDITIONAL AGREEMENTS......................................................................12
         4.1          Legal Conditions to Merger.................................................................12
         4.2          Agreement to Defend........................................................................14
         4.3          Accounting Matters.........................................................................14
         4.4          Public Announcements.......................................................................14
         4.5          Other Actions..............................................................................14
         4.6          Advice of Changes; SEC Filings.............................................................14
         4.7          Reorganization.............................................................................15
         4.8          Takeover Defenses..........................................................................15
         4.9          Letter of Camco,s Accountants..............................................................15
         4.10         Letter of Schlumberger's Accountants.  ....................................................15
</TABLE>

                                      -i-
<PAGE>
 
<TABLE>
<S>                                                                                                             <C>
         4.11         Rights Agreement...........................................................................15
         4.12         Stock Options..............................................................................16

ARTICLE V             CONDITIONS PRECEDENT.......................................................................16
         5.1          Conditions to Camco's Closing Deliveries...................................................16
                      (a)  Representations and Warranties.  .....................................................16
                      (b)  Performance of Obligations of Schlumberger.  .........................................16
                      (c)  Certifications and Opinion.  .........................................................16
                      (d)  Fairness Opinion......................................................................17
         5.2          Conditions to Schlumberger's Closing Deliveries.  .........................................17
                      (a)  Representations and Warranties.  .....................................................18
                      (b)  Performance of Obligations of Camco.  ................................................18
                      (c)  Certifications and Opinion.  .........................................................18

ARTICLE VI            TERMINATION AND AMENDMENT..................................................................19
         6.1          Termination................................................................................19
         6.2          Effect of Termination. ....................................................................19
         6.3          Amendment.  ...............................................................................20
         6.4          Extension; Waiver.  .......................................................................20

ARTICLE VII           GENERAL PROVISIONS.........................................................................20
         7.1          Payment of Expenses........................................................................20
         7.2          Nonsurvival of Representations, Warranties and Agreements.  ...............................20
         7.3          Notices.  .................................................................................20
         7.4          Interpretation.  ..........................................................................21
         7.5          Counterparts.  ............................................................................22
         7.6          Entire Agreement; No Third-Party Beneficiaries.............................................22
         7.7          Governing Law.  ...........................................................................22
         7.8          No Remedy in Certain Circumstances.  ......................................................22
         7.9          Assignment.  ..............................................................................22
         7.10         Enforcement of the Agreement.  ............................................................22
</TABLE>


EXHIBITS:

Exhibit A- Agreement and Plan of Merger

                                      -ii-
<PAGE>
 
                             TRANSACTION AGREEMENT


          THIS TRANSACTION AGREEMENT, dated as of June 18, 1998 (this
"Transaction Agreement"), is by and between Schlumberger Limited, a Netherlands
Antilles corporation ("Schlumberger"), and Camco International Inc., a Delaware
corporation ("Camco").

          WHEREAS, pursuant to that certain Agreement and Plan of Merger of even
date herewith, among Schlumberger Technology Corporation, a Texas corporation
and a wholly owned subsidiary of Schlumberger ("STC"), Schlumberger OFS, Inc., a
Delaware corporation and a wholly owned Subsidiary of STC ("Sub"), and Camco
(the "Merger Agreement"), Sub will be merged with and into Camco with Camco
becoming a wholly owned subsidiary of STC (the "Merger");

          WHEREAS, the Board of Directors at Camco and Schlumberger have each
determined that this Transaction Agreement and the transactions contemplated
hereby are in the best interests of their respective stockholders;

          WHEREAS, pursuant to the Merger Agreement, each outstanding share of
common stock, par value $.01 per share, of Camco ("Camco Common Stock") will be
exchanged for and converted into 1.18 (the "Conversion Number") shares of voting
common stock, par value $.01  per share of Schlumberger ("Schlumberger Common
Stock"); and

          WHEREAS, Schlumberger desires to make certain representations and
commitments in connection with the Merger;

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


                                   ARTICLE I

                                  DEFINITIONS

          As used in this Transaction Agreement, the following terms shall have
the following meanings:

          "Camco" has the meaning set forth in the preamble hereto.
           -----                                                   

          "Camco Common Stock" has the meaning set forth in the recitals hereto.
           ------------------                                                   

          "Camco Disclosure Letter" means the disclosure letter delivered by
           -----------------------                                          
Camco to STC pursuant to the Merger Agreement.

          "Camco Litigation" has the meaning set forth in Section 3.1(b) hereof.
           ----------------                                                     

                                      -1-
<PAGE>
 
          "Camco Order" has the meaning set forth in Section 3.1(j) of the
           -----------                                                    
Merger Agreement.

          "Camco Stock Option" has the meaning set forth in Section 5.5 of the
           ------------------                                                 
Merger Agreement.

          "Certificate of Merger" has the meaning set forth in Section 1.1 of
           ---------------------                                             
the Merger Agreement.

          "Closing" has the meaning set forth in Section 1.1 of the Merger
           -------                                                        
Agreement.

          "Closing Date" has the meaning set forth in Section 1.2 of the Merger
           ------------                                                        
Agreement.

          "Code" has the meaning set forth in the recitals to the Merger
           ----                                                         
Agreement.

          "Confidentiality Agreements" has the meaning set forth in Section 5.1
           --------------------------                                          
of the Merger Agreement.

          "Conversion Number" has the meaning set forth in the recitals hereto.
           -----------------                                                   

          "Delivery Date" has the meaning set forth in Section 2.1 hereof.
           -------------                                                  

          "DGCL" has the meaning set forth in Section 1.1 of the Merger
           ----                                                        
Agreement.

          "Effective Time" has the meaning set forth in Section 1.1 of the
           --------------                                                 
Merger Agreement.

          "Exchange Act" has the meaning set forth in Section 3.1(a)(iii)
           ------------                                                  
hereof.

          "GAAP" has the meaning set forth in Section 3.1(d) of the Merger
           ----                                                           
Agreement.

          "Governmental Entity" has the meaning set forth in Section 3.1(a)(iii)
           -------------------                                                  
hereof.

          "HSR Act" has the meaning set forth in Section 3.1(a)(iii) hereof.
           -------                                                          

          "Knowledge" "known to", "best knowledge" and terms of similar meaning
           ---------                                                           
shall mean (a) with respect to Camco, (i) the Chief Financial Officer, the Chief
Accounting Officer and the General Counsel and Secretary of Camco as of the date
of this Agreement and (ii) all of the officers of Camco as of the Closing Date
and (b) with respect to Schlumberger, (A) (1) the Executive Vice President,
Chief Financial Officer and (2) the General Counsel and Secretary of
Schlumberger, as of the date of this Agreement and (B) all of the officers of
Schlumberger as of the Closing Date.

          "Material Adverse Effect" has the meaning set forth in Section
           -----------------------                                      
3.1(a)(i) hereof.

          "Merger" has the meaning set forth in the recitals hereto.
           ------                                                   

                                      -2-
<PAGE>
 
          "Merger Agreement" has the meaning set forth in the recitals hereto.
           ----------------                                                   

          "NYSE" has the meaning set forth in Section 3.2(c)(iii) hereof.
           ----                                                          

          "Proxy Statement" has the meaning set forth in Section 3.1(a)(iii)
           ---------------                                                  
hereof.

          "Returns" has the meaning set forth in Section 3.1(k)(i) of the Merger
           -------                                                              
Agreement.

          "Rights Agreement" has the meaning set forth in Section 3.1(b) of the
           ----------------                                                    
Merger Agreement.

          "S-4" has the meaning set forth in Section 3.1(e) of the Merger
           ---                                                           
Agreement.

          "Schlumberger" has the meaning set forth in the preamble hereto.
           ------------                                                   

          "Schlumberger Common Stock" has the meaning set forth in the recitals
           -------------------------                                           
hereto.

          "Schlumberger Disclosure Letter" means the disclosure letter delivered
           ------------------------------                                       
by Schlumberger to Camco pursuant to this Transaction Agreement.

          "Schlumberger Litigation" has the meaning set forth in Section 3.2(h)
           -----------------------                                             
hereof.

          "Schlumberger Option Plans" has the meaning set forth in Section
           -------------------------                                      
3.2(b) hereof.

          "Schlumberger Preferred Stock" has the meaning set forth in 3.2(b)
           ----------------------------                                     
hereof.

          "Schlumberger SEC Documents" has the meaning set forth in Section
           --------------------------                                      
3.2(d) hereof.

          "SEC" has the meaning set forth in Section 3.1(a) of the Merger
           ---                                                           
Agreement.

          "Securities Act" has the meaning set forth in Section 3.1(d) of the
           --------------                                                    
Merger Agreement.

          "Significant Subsidiary" has the meaning set forth in Section 4.1(g)
           ----------------------                                             
of the Merger Agreement.

          "STC" has the meaning set forth in the recitals hereto.
           ---                                                   

          "Sub" has the meaning set forth in the recitals hereto.
           ---                                                   

          "Subsidiary" has the meaning set forth in Section 2.1(b) of the Merger
           ----------                                                           
Agreement.

          "Voting Debt" has the meaning set forth in Section 3.1(b) of the
           -----------                                                    
Merger Agreement.

                                      -3-
<PAGE>
 
                                   ARTICLE II

                           DELIVERY, REGISTRATION AND
                         LISTING OF SCHLUMBERGER STOCK

      2.1 Delivery of Schlumberger Common Stock.  Prior to the Merger, upon the
request of STC and subject to the conditions set forth in Section 5.2 hereof,
Schlumberger will sell to STC all or any portion of that number of shares of
Schlumberger Common Stock which are to be received by the holders of Camco
Common Stock in exchange for and upon conversion of the Camco Common Stock
pursuant to Section 2.1(c) of the Merger Agreement.  The date on which
Schlumberger delivers such Schlumberger Common Stock to STC is referred to in
this Transaction Agreement as the "Delivery Date".  Schlumberger acknowledges
that, pursuant to Section 2.1(e) of the Merger Agreement, if subsequent to the
date of this Agreement but prior to the Effective Time, the number of shares of
Schlumberger Common Stock issued and outstanding is changed as a result of a
stock split, reverse stock split, stock dividend, recapitalization or other
similar transaction, the Conversion Number and other items dependent thereon
will be appropriately adjusted in the Merger Agreement and this Transaction
Agreement.

      2.2 Preparation of S-4 and the Proxy Statement.  Schlumberger and Camco
shall promptly prepare and file with the SEC the Proxy Statement and
Schlumberger shall prepare and file with the SEC the S-4, in which the Proxy
Statement will be included as a prospectus.  Each of Schlumberger and Camco
shall use its best efforts to have the S-4 declared effective under the
Securities Act as promptly as practicable after such filing.  Each of Camco and
Schlumberger shall use its best efforts to cause the Proxy Statement to be
mailed to stockholders of Camco at the earliest practicable date.  Schlumberger
shall use its best efforts to obtain all necessary state securities laws or
"blue sky" permits, approvals and registrations in connection with the issuance
of Schlumberger Common Stock in the Merger and upon the exercise of Camco Stock
Options and Camco shall furnish all information concerning Camco and the holders
of Camco Common Stock as may be reasonably requested in connection with
obtaining such permits, approvals and registrations.

      2.3 Authorization for Shares and Stock Exchange Listing.  Prior to the
Effective Time, Schlumberger shall have taken all action necessary to permit it
to issue the number of shares of Schlumberger Common Stock required to be issued
pursuant to Section 2.1 of the Merger Agreement. Schlumberger shall use all
reasonable efforts to cause the shares of Schlumberger Common Stock to be
delivered in the Merger to be approved for listing on the NYSE, subject to
official notice of issuance, prior to the Closing Date.

                                      -4-
<PAGE>
 
                                  ARTICLE III

                         REPRESENTATIONS AND WARRANTIES

      3.1 Representations and Warranties of Camco.  Camco represents and
warrants to Schlumberger as follows:

           (a) Authority; No Violations; Consents and Approvals.

               (i) Camco has all requisite corporate power and authority to
          enter into this Transaction Agreement and to consummate the
          transactions contemplated hereby.  The execution and delivery of this
          Transaction Agreement and the consummation of the transactions
          contemplated hereby have been duly authorized by all necessary
          corporate action on the part of Camco.  This Transaction Agreement has
          been duly executed and delivered by Camco and assuming this
          Transaction Agreement constitutes the valid and binding obligation of
          Schlumberger, constitutes a valid and binding obligation of Camco
          enforceable in accordance with its terms, subject, as to
          enforceability, to bankruptcy, insolvency, reorganization and other
          laws of general applicability relating to or affecting creditors'
          rights and to general principles of equity and limitations imposed on
          indemnity obligations by applicable federal and state securities laws.

               (ii) Except as set forth on Schedule 3.1(c) to the Camco
          Disclosure Letter, the execution and delivery of this Transaction
          Agreement does 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 any obligation
          or to the loss of a material benefit under, or result in the creation
          of any lien, security interest, charge or encumbrance upon any of the
          properties or assets of Camco or any of its Subsidiaries under, any
          provision of (A) the Certificate of Incorporation or Bylaws of Camco
          or any provision of the comparable charter or organizational documents
          of any of its Subsidiaries, (B) any loan or credit agreement, note,
          bond, mortgage, indenture, lease or other agreement, instrument,
          permit, concession, franchise or license applicable to Camco or any of
          its Subsidiaries or (C) assuming the consents, approvals,
          authorizations or permits and filings or notifications referred to in
          Section 3.1(a)(iii) are duly and timely obtained or made and the
          approval of the Merger and the Merger Agreement by the stockholders of
          Camco has been obtained, any judgment, order, decree, statute, law,
          ordinance, rule or regulation applicable to Camco or any of its
          Subsidiaries or any of their respective properties or assets, other
          than, in the case of clause (B) or (C), any such conflicts,
          violations, defaults, rights, liens, security interests, charges or
          encumbrances that, individually or in the aggregate, would not have a
          Material Adverse Effect (as defined below) on Camco, materially impair
          the 

                                      -5-
<PAGE>
 
          ability of Camco to perform its obligations hereunder or prevent the
          consummation of any of the transactions contemplated hereby. As used
          in this Transaction Agreement a "Material Adverse Effect" shall mean,
          any effect or change that is or would be materially adverse to the
          business, operations, assets, condition (financial or otherwise) or
          results of operations of (x) in respect of Camco, Camco and its direct
          and indirect Subsidiaries, taken as a whole, and (y) in respect of the
          STC Affiliated Group, the STC Affiliated Group taken as a whole;
          provided, however, a Material Adverse Effect shall not include (1) any
          effect or change, including changes in national or international
          economic conditions, relating to or affecting the oil and gas service
          and equipment industry as a whole (including a decline in worldwide
          oil and gas commodity prices), (2) changes, or possible changes, in
          foreign, federal, state or local statutes and regulations, (3) the
          loss of employees, customers or suppliers by Camco or one or more of
          its Subsidiaries as a direct or indirect consequence of any
          announcement relating to the Merger or (4) any action taken or
          required to be taken to satisfy any requirement imposed in connection
          with the review of the Merger under the HSR Act. As used herein, the
          term "Consideration" means the number of shares of Camco Common Stock
          outstanding on the day prior to the date of this Agreement multiplied
          by the Conversion Number and then multiplied by the closing sales
          price of Schlumberger Common Stock on the NYSE on the last trading day
          prior to the date of this Agreement.

               (iii)  No consent, approval, order or authorization of, or
          registration, declaration or filing with, or permit from, any U.S. or
          non-U.S. court, administrative agency or commission or other
          governmental authority or instrumentality (a "Governmental Entity") is
          required by or with respect to Camco or any of its Subsidiaries in
          connection with the execution and delivery of this Transaction
          Agreement by Camco or the consummation by Camco of the transactions
          contemplated hereby, as to which the failure to obtain or make would
          have a Material Adverse Effect on Camco, except for: (A) the filing of
          a premerger notification report by Camco under the Hart-Scott-Rodino
          Antitrust Improvements Act of 1976, as amended (the "HSR Act"), and
          the expiration or termination of the applicable waiting period with
          respect thereto; (B) the filing with the SEC of (1) a proxy statement
          in preliminary and definitive form relating to the meeting of Camco's
          stockholders to be held in connection with the Merger (the "Proxy
          Statement") and (2) such reports under Section 13(a) of the Securities
          Exchange Act of 1934, as amended (the "Exchange Act"), and such other
          compliance with the Exchange Act and the rules and regulations
          thereunder, as may be required in connection with this Transaction
          Agreement, the Merger Agreement and the transactions contemplated
          hereby and thereby; (C) the filing of the Certificate of Merger with
          the Secretary of State of the State of Delaware; (D) such filings and
          approvals as may be required by any applicable state securities, "blue
          sky" or takeover laws, or environmental laws; (E) such filings and
          approvals as may be required by any applicable non-U.S. 

                                      -6-
<PAGE>
 
          Governmental Entity; and (F) such filings and approvals as may be
          required by any non-U.S. premerger notification, securities, corporate
          or other law, rule or regulation.

           (b) Litigation.  Except as disclosed in the Camco SEC Documents or in
     the Camco litigation report previously delivered to Schlumberger, there is
     no (i) suit, action or proceeding pending or, to the best knowledge of
     Camco, threatened against or affecting Camco or any Subsidiary of Camco
     ("Camco Litigation"), or (ii) Camco Order,  that would (in any case) have a
     Material Adverse Effect on Camco or prevent Camco from consummating the
     transactions contemplated by this Transaction Agreement.

           (c) Incorporation by Reference.  Each of the representations and
     warranties made by Camco in the Merger Agreement is incorporated by
     reference herein as if fully set forth herein together with the definitions
     of the defined terms used therein, mutatis mutandis, so that references to
     the recipient of any such representations and warranties shall be deemed to
     be references to Schlumberger.  Each such representation and warranty so
     incorporated herein by reference is hereby confirmed directly to
     Schlumberger.

      3.2 Representations and Warranties of Schlumberger.  Schlumberger
represents and warrants to Camco as follows:

           (a) Organization, Standing and Power.  Schlumberger is a corporation
     duly organized, validly existing and in good standing under the laws of its
     jurisdiction of incorporation, has all requisite corporate power and
     authority to own, lease and operate its properties and to carry on its
     business as now being conducted, and is duly qualified and in good standing
     to do business in each jurisdiction in which the business it is conducting,
     or the operation, ownership or leasing of its properties, makes such
     qualification necessary, other than where (individually as in the
     aggregate) the failure to be so organized or so to qualify would not have a
     Material Adverse Effect on Schlumberger.  Complete and correct copies of
     the Certificates of Incorporation and Bylaws of Schlumberger have
     heretofore been made available to Camco.

           (b) Capital Structure.  As of the date hereof, the authorized capital
     stock of Schlumberger consists of 1,000,000,000 shares of Schlumberger
     Common Stock and 200,000,000 shares of preferred stock ("Schlumberger
     Preferred Stock").  At the close of business on May 31, 1998 (i)
     498,941,351 shares of Schlumberger Common Stock were issued and outstanding
     and an aggregate of 58,644,415 shares of Schlumberger Common Stock were
     reserved for issuance pursuant to Schlumberger's:

                                      -7-
<PAGE>
 
<TABLE>
<CAPTION>
 
<S>                                           <C>
          Discounted Stock Purchase Plan....  14,624,867
          1998 Stock Option Plan............  12,000,000
          1979 Stock Incentive Plan.........     119,300
          1979 Incentive Stock Option Plan..      86,044
          1994 Stock Option Plan............  19,557,184
          1989 Stock  Incentive Plan........  12,247,263
          IVS Stock Option Plan.............       9,757
</TABLE>

     (collectively, the "Schlumberger Option Plans"); (ii) 120,201,108 shares of
     Schlumberger Common Stock were held by Schlumberger in its treasury or by
     its wholly owned Subsidiaries; (iii) a warrant to acquire 15,000,000 shares
     of Schlumberger Common Stock at an exercise price per share of $29.975 was
     outstanding; (iv) no shares of Schlumberger Preferred Stock were
     outstanding; and (v) no Voting Debt was outstanding.  All outstanding
     shares of Schlumberger Common Stock are, and the shares of Schlumberger
     Common Stock when issued in accordance with this Transaction Agreement, and
     upon exercise of the Camco Stock Options to be assumed pursuant to the
     Merger, will be, validly issued, fully paid and nonassessable and not
     subject to preemptive rights.  Except as set forth on Schedule 3.2(b) to
     the Schlumberger Disclosure Letter, all outstanding shares of capital stock
     of the Significant Subsidiaries of Schlumberger have been duly authorized
     and validly issued and are fully paid and non-assessable, and were not
     issued in violation of any preemptive rights or other preferential rights
     of subscription or purchase other than those that have been waived or
     otherwise cured or satisfied, and, except as set forth in the Schlumberger
     SEC Documents or Schedule 3.2(b) to the Schlumberger Disclosure Letter, all
     such shares are owned by Schlumberger or a direct or indirect wholly owned
     Subsidiary of Schlumberger, free and clear of all liens, charges,
     encumbrances, claims and options of any nature.

           (c) Authority; No Violations, Consents and Approvals.

               (i) Schlumberger has all requisite corporate power and authority
          to enter into this Transaction Agreement and to consummate the
          transactions contemplated hereby.  The execution and delivery of this
          Transaction Agreement and the consummation of the transactions
          contemplated hereby have been duly authorized by all necessary
          corporate action on the part of Schlumberger.  This Transaction
          Agreement has been duly executed and delivered by Schlumberger.
          Assuming this Transaction Agreement constitutes the valid and binding
          obligation of Camco, it also constitutes a valid and binding
          obligation of Schlumberger and is enforceable against Schlumberger in
          accordance with its terms; provided, however, that such enforceability
          is subject to bankruptcy, insolvency, reorganization and other laws of
          general applicability relating to or affecting creditors' rights and
          to general principles of equity and limitations imposed on indemnity
          obligations by applicable federal and state securities laws.

                                      -8-
<PAGE>
 
               (ii) Except as set forth an Schedule 3.2(c)(ii) to the
          Schlumberger Disclosure Letter, the execution and delivery of this
          Transaction Agreement does 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
          any obligation or to the loss of a material benefit under, or result
          in the creation of any lien, security interest, charge or encumbrance
          upon any of the properties or assets of Schlumberger or any of its
          Subsidiaries under, any provision of (A) the Certificate of
          Incorporation or Bylaws of Schlumberger or any provision of the
          comparable charter or organizational documents of any of its
          Significant Subsidiaries, (B) any loan or credit agreement, note,
          bond, mortgage, indenture, lease or other agreement, instrument,
          permit, concession, franchise or license applicable to Schlumberger or
          any of its Subsidiaries or (C) assuming the consents, approvals,
          authorizations or permits and filings or notifications referred to in
          Section 3.2(c)(iii) are duly and timely obtained or made and the
          approval of the Merger and this Transaction Agreement by the
          stockholders of Schlumberger has been obtained, any judgment, order,
          decree, statute, law, ordinance, rule or regulation applicable to
          Schlumberger or any of its Subsidiaries or any of their respective
          properties or assets, other than, in the case of clause (B) or (C),
          any such conflicts, violations, defaults, rights, liens, security
          interests, charges or encumbrances that, individually or in the
          aggregate, would not have a Material Adverse Effect on Schlumberger or
          prevent in any material respect the consummation of any of the
          transactions contemplated hereby.

               (iii)  No consent, approval, order or authorization of, or
          registration, declaration or filing with, or permit from, any
          Governmental Entity is required by or with respect to Schlumberger or
          any of its Subsidiaries in connection with the execution and delivery
          of this Transaction Agreement by Schlumberger or the consummation by
          Schlumberger of the transactions contemplated hereby, as to which the
          failure to obtain or make would have a Material Adverse Effect on
          Schlumberger, except for: (A) the filing of a premerger notification
          report by Schlumberger under the HSR Act and the expiration or
          termination of the applicable waiting period with respect thereto; (B)
          the filing with the SEC of the Proxy Statement, the S-4, such reports
          under Section 13(a) of the Exchange Act and such other compliance with
          the Securities Act and the Exchange Act and the rules and regulations
          thereunder as may be required in connection with this Transaction
          Agreement, the Merger Agreement and the transactions contemplated
          hereby and thereby, and the obtaining from the SEC of such orders as
          may be so required; (C) the filing of the Certificate of Merger with
          the Secretary of State of the State of Delaware; (D) filings with, and
          approval of, the New York Stock Exchange, Inc. (the "NYSE"); (E) such
          filings and approvals as may be required by any applicable state
          securities, "blue sky" or takeover laws or environmental laws; (F)
          such filings and approvals as may be required by any applicable non-
          U.S. Governmental Entity; and (G) such filings and approvals as may 

                                      -9-
<PAGE>
 
          be required by any non-U.S. premerger notification, securities,
          corporate or other law, rule or regulation.

           (d) SEC Documents.  A true and complete copy of each report,
     schedule, registration statement and definitive proxy statement filed by
     Schlumberger with the SEC since January 1, 1995 and prior to the date of
     this Transaction Agreement (the "Schlumberger SEC Documents") has been made
     available to Camco. The Schlumberger SEC Documents are all the documents
     (other than preliminary material) that Schlumberger was required to file
     with the SEC since such date.  As of their respective dates, the
     Schlumberger 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 thereunder applicable to such
     Schlumberger SEC Documents, and none of the Schlumberger SEC Documents
     contained when filed any untrue statement of a material fact or omitted to
     state a material fact required to be stated therein or necessary to make
     the statements therein, in light of the circumstances under which they were
     made, not misleading.  The financial statements of Schlumberger included in
     the Schlumberger SEC Documents complied as to form in all material respects
     with the published rules and regulations of the SEC with respect thereto,
     were prepared in accordance with GAAP applied on a consistent basis during
     the periods involved (except as may be indicated in the notes thereto or,
     in the case of the unaudited statements, as permitted by Rule 10-01 of
     Regulation S-X of the SEC) and fairly present in accordance with applicable
     requirements of GAAP (subject, in the case of the unaudited statements, to
     normal year-end adjustments and other adjustments discussed therein) the
     consolidated financial position of Schlumberger and its consolidated
     Subsidiaries as of their respective dates and the consolidated results of
     operations and the consolidated cash flows of Schlumberger and its
     consolidated Subsidiaries for the periods presented therein.

           (e) Information Supplied.  None of the information supplied or to be
     supplied by Schlumberger or any of its Subsidiaries for inclusion or
     incorporation by reference in the S-4 will, at the time the S-4 is filed
     with 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
     Schlumberger or any of its Subsidiaries and included or incorporated by
     reference in the Proxy Statement will, at the date mailed to stockholders
     of Camco or at the time of the meeting of such stockholders to be held in
     connection with the Merger, 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.  If at any time
     prior to the Effective Time any event with respect to Schlumberger or any
     of its Subsidiaries, or with respect to other information supplied by
     Schlumberger or any of its Subsidiaries for inclusion in the Proxy
     Statement or S-4, shall occur which is required to be described in an
     amendment of, or a supplement to, the Proxy Statement or the S-4, such
     event shall be so described, and such amendment or supplement shall be
     promptly filed with 

                                      -10-
<PAGE>
 
     the SEC. The Proxy Statement, insofar as it relates to Schlumberger or
     Subsidiaries of Schlumberger or other information supplied by Schlumberger
     or any of its Subsidiaries for inclusion therein, will comply as to form in
     all material respects with the provisions of the Exchange Act and the rules
     and regulations thereunder, except that no representations or warranties
     are made by Schlumberger with respect to statements made or incorporated by
     reference therein based on information supplied by Camco or any of Camco's
     Subsidiaries.

           (f) Absence of Certain Changes or Events.  Except as disclosed in, or
     reflected in the financial statements included in, the Schlumberger SEC
     Documents or on Schedule 3.2(f) to the Schlumberger Disclosure Letter, or
     except as contemplated by this Transaction Agreement or the Merger
     Agreement, since December 31, 1997 there has not been: (i) any declaration,
     setting aside or payment of any dividend or other distribution (whether in
     cash, stock or property) with respect to any of Schlumberger's capital
     stock, except for regular quarterly cash dividends of $.1875 per share on
     Schlumberger Common Stock with usual record and payment dates for such
     dividends; (ii) any amendment of any material term of any outstanding
     equity security of Schlumberger or any Significant Subsidiary; (iii) any
     material change in any method of accounting or accounting practice by
     Schlumberger or any Significant Subsidiary; or (iv) any other transaction,
     commitment, dispute or other event or condition (financial or otherwise) of
     any character (whether or not in the ordinary course of business) that
     would have a Material Adverse Effect on Schlumberger.

           (g) No Undisclosed Material Liabilities.  Except as disclosed in the
     Schlumberger SEC Documents or on Schedule 3.2(g) to the Schlumberger
     Disclosure Letter, there are no liabilities of Schlumberger or any of its
     Subsidiaries of any kind whatsoever, whether accrued, contingent, absolute,
     determined, determinable or otherwise, that would have a Material Adverse
     Effect on Schlumberger, other than: (i) liabilities adequately provided for
     on the balance sheet of Schlumberger dated as of March 31, 1998 (including
     the notes thereto) contained in Schlumberger's Quarterly Report on Form 10-
     Q for the quarter ended March 31, 1998; (ii) liabilities incurred in the
     ordinary course of business since March 31, 1998; and (iii) liabilities
     under this Transaction Agreement and the Merger Agreement.

           (h) Litigation.  Except as disclosed in the Schlumberger SEC
     Documents or on Schedule 3.2(h)  to the Schlumberger Disclosure Letter,
     there is no (i) suit, action or proceeding pending or, to the best
     knowledge of Schlumberger, threatened against or affecting Schlumberger or
     any Subsidiary of Schlumberger ("Schlumberger Litigation"), or (ii)
     judgment, decree, injunction, rule or order of any Governmental Entity or
     arbitrator outstanding against Schlumberger or any Subsidiary of
     Schlumberger  that (in any case) would have a Material Adverse Effect on
     Schlumberger or prevent Schlumberger from consummating the transactions
     contemplated by this Transaction Agreement or by the Merger Agreement.

                                      -11-
<PAGE>
 
           (i) No Vote Required.  No vote of the holders of any class or series
     of Schlumberger capital stock is necessary to approve the issuance of
     Schlumberger Common Stock pursuant to this Transaction Agreement and the
     transactions contemplated hereby.

           (j) Accounting Matters.  To the best knowledge of the financial and
     accounting officers of Schlumberger prior to the date hereof, neither
     Schlumberger nor any of its Affiliates has taken any action that (without
     giving effect to any action taken or agreed to be taken by Camco or any of
     its Affiliates) would jeopardize the treatment of the business combination
     to be effected by the Merger as a pooling of interests for accounting
     purposes.

           (k) Beneficial Ownership of Camco Common Stock.  As of the date
     hereof, neither Schlumberger nor its Subsidiaries "beneficially owns" (as
     defined in Rule 13d-3 under the Exchange Act) any shares of Camco Common
     Stock.

           (l) Material Contracts and Agreements.  All material contracts of
     Schlumberger or its Subsidiaries have been included in the Schlumberger SEC
     Documents unless not required to be included pursuant to the rules and
     regulations of the SEC.  Schedule 3.2(l) of the Schlumberger Disclosure
     Letter sets forth a list of all written or oral contracts, agreements or
     arrangements to which Schlumberger or any of its Subsidiaries or any of
     their respective assets are bound which meet the definition of material
     contracts set forth in Section 6.01 of Regulation S-K promulgated under the
     Securities Act and which have not been included in the Schlumberger SEC
     Documents.

                                   ARTICLE IV

                             ADDITIONAL AGREEMENTS

      4.1 Legal Conditions to Merger.

          (a) Except as otherwise provided herein, Camco and Schlumberger will
     each take all reasonable actions necessary to comply promptly with all
     legal requirements that may be imposed on such party with respect to the
     Merger (including, without limitation, furnishing all information required
     under the HSR Act and in connection with approvals of or filings with any
     other Governmental Entity) and will promptly cooperate with and furnish
     information to each other in connection with any such requirements imposed
     upon any of them or any of their Subsidiaries in connection with the
     Merger.  Each of Camco and Schlumberger will, and will cause its respective
     Subsidiaries to, take all actions necessary to obtain (and will cooperate
     with each other in obtaining) any consent, acquiescence, authorization,
     order or approval of, or any exemption or nonopposition by, any
     Governmental Entity or court required to be obtained or made by Camco,
     Schlumberger or any of their Subsidiaries in connection with the Merger or
     the taking of any action contemplated thereby, by the Merger Agreement or
     by this Transaction Agreement, including 

                                      -12-
<PAGE>
 
     complying with any requests or orders made by the Justice Department or the
     Federal Trade Commission in connection with the Merger.

          (b) 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 reasonable efforts to promptly respond to
     any request for additional information pursuant to Section (e)(1) of the
     HSR Act.  Except as otherwise required by United States regulatory
     considerations, Camco will furnish to Schlumberger copies of all
     correspondence, filings or communications (or memoranda setting forth the
     substance thereof (collectively, "Company HSR Documents")) between Camco,
     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, the Merger Agreement or
     the Merger; provided; however, that (x) with respect to documents and other
     materials filed by or on behalf of Camco with the Antitrust Division of the
     Department of Justice, the Federal Trade Commission, or any state attorneys
     general that are available for review by Schlumberger, copies will not be
     required to be provided to Schlumberger and (y) with respect to any Camco
     HSR Documents (1) that contain any information which, in the reasonable
     judgment of Fulbright & Jaworski L.L.P., should not be furnished to
     Schlumberger 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 Camco to furnish any such Camco HSR Documents to
     Schlumberger shall be satisfied by the delivery of such Camco HSR Documents
     on a confidential basis to Baker & Botts, L.L.P., pursuant to a
     confidentiality agreement in form and substance reasonably satisfactory to
     Schlumberger.  Except as otherwise required by United States regulatory
     considerations, Schlumberger will furnish to Camco copies of all
     correspondence, filings or communications (or memoranda setting forth the
     substance thereof (collectively, "Schlumberger HSR Documents")) between
     Schlumberger or any of its representatives, on the one hand, and any
     Governmental Entity, or member of the staff of such agency or authority, on
     the other hand, and any Governmental Entity, or member of the staff of such
     agency or authority, on the other hand, with respect to this Agreement, the
     Merger Agreement or the Merger; provided, however, that (x) with respect to
     documents and other materials filed by or on behalf of Schlumberger with
     the Antitrust Division of the Department of Justice, the Federal Trade
     Commission, or any state attorneys general that are available for review by
     Camco, copies will not be required to be provided to Camco, and (y) with
     respect to any Schlumberger HSR Documents (1) that contain information
     which, in the reasonable judgment of Baker & Botts, L.L.P.,  should not be
     furnished to Camco 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 Schlumberger to furnish any such Schlumberger HSR
     Documents to Camco shall be satisfied by the delivery of such Schlumberger
     HSR Documents on a confidential basis to Fulbright & Jaworski L.L.P.
     pursuant to a confidentiality agreement in form and substance reasonably
     satisfactory to Camco.

                                      -13-
<PAGE>
 
          (c) In the event that any governmental body with jurisdiction of this
     Merger shall require Schlumberger or any of its Subsidiaries to agree to
     take or not to take any action as a condition to approving or not objecting
     to the Merger, Schlumberger will take such action (i) if the loss in annual
     revenues to the Surviving Corporation would reasonably be expected not to
     exceed $75 million during the ensuing twelve months following the Closing,
     or (ii) if Schlumberger otherwise considers it reasonable and appropriate
     in the circumstances to take such action.

      4.2 Agreement to Defend.  In the event any claim, action, suit,
investigation or other proceeding by any governmental body or other person or
other legal or 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.

      4.3 Accounting Matters.  During the period from the date of this
Transaction Agreement through the Effective Time, unless the parties shall
otherwise agree in writing, neither Schlumberger nor Camco or any of their
respective Subsidiaries shall knowingly take or fail to take any reasonable
action which action or failure to act would jeopardize the treatment of the
Merger as a pooling of interests for accounting purposes.

      4.4 Public Announcements.  Schlumberger and Camco will consult with each
other before issuing any press release or otherwise making any public statements
with respect to the transactions contemplated by this Transaction Agreement, and
shall not issue any such press release or make any such public statement prior
to such consultation, except as may be required by applicable law or by
obligations pursuant to any listing agreement with any national securities
exchange or transaction reporting system.

      4.5 Other Actions.  Except as contemplated by this Transaction Agreement
or the Merger Agreement, neither Schlumberger nor Camco shall, and neither shall
permit any of its Subsidiaries to, take or agree or commit to take or omit to
take any action that is reasonably likely to result in any of its respective
representations or warranties hereunder or under the Merger Agreement being
untrue in any material respect or in any of the conditions to the Merger set
forth in Article VI to the Merger Agreement not being satisfied.

      4.6 Advice of Changes; SEC Filings.  Schlumberger and Camco shall confer
on a regular basis with each other, report on operational matters of Camco and
promptly advise each other orally and in writing of any change or event having,
or which, insofar as can reasonably be foreseen, could have, a Material Adverse
Effect on Schlumberger or Camco, as the case may be.  Subject to the provisions
of Section 4.1, Camco and Schlumberger shall promptly provide each other (or
their respective counsel) copies of all filings made by such party with the SEC
or any other state or federal Governmental Entity in connection with this
Transaction Agreement or the Merger Agreement and the transactions contemplated
hereby and thereby.

                                      -14-
<PAGE>
 
      4.7 Reorganization.  It is the intention of Schlumberger and Camco that
the Merger will qualify as a reorganization described in Section 368(a)(1)(B) of
the Code (and any comparable provisions of applicable state law).  Neither
Schlumberger nor Camco (nor any of their respective Subsidiaries) will take or
omit to take any action (whether before, on or after the Closing Date) that
would cause the Merger not to be so treated.  The parties (and their respective
Subsidiaries) will characterize the Merger as such a reorganization for purposes
of all Returns and other filings.

      4.8 Takeover Defenses.  Schlumberger and Camco shall each take such action
with respect to any takeover provisions in its respective Certificate of
Incorporation or Bylaws or afforded it by statute to the extent necessary to
consummate the Merger on the terms set forth in the Merger Agreement.

      4.9 Letter of Camco's Accountants.  Camco shall use its best efforts to
cause to be delivered to Schlumberger a letter of Arthur Andersen LLP, Camco's
independent public accountants, dated a date within two business days before the
date on which the S-4 shall become effective and addressed to Schlumberger and
Camco, in form and substance reasonably satisfactory to Schlumberger and
customary in scope and substance for letters delivered by independent public
accountants in connection with registration statements similar to the S-4.  In
connection with Camco's efforts to obtain such letter, if requested by Arthur
Andersen LLP, Schlumberger shall provide a representation letter to Arthur
Andersen LLP complying with SAS 72, if then required.

      4.10     Letter of Schlumberger's Accountants.  Schlumberger shall use its
best efforts to cause to be delivered to Camco a letter of Price Waterhouse LLP,
Schlumberger's independent public accountants, dated a date within two business
days before the date on which the S-4 shall become effective and addressed to
Camco and Schlumberger, in form and substance reasonably satisfactory to Camco
and customary in scope and substance for letters delivered by independent public
accountants in connection with registration statements similar to the S-4.  In
connection with Schlumberger's efforts to obtain such letter, if requested by
Price Waterhouse LLP, Camco shall provide a representation letter to Price
Waterhouse LLP complying with SAS 72, if then required.

      4.11     Rights Agreement.  Prior to the Effective Time, the Board of
Directors of Camco shall take any action (including, as necessary, amending or
terminating (but with respect to termination, only as of immediately prior to
the Effective Time) the Rights Agreement) necessary so that none of the
execution and delivery of this Transaction Agreement, the conversion of shares
of Camco Common Stock into the right to receive Schlumberger Common Stock in
accordance with Article II of this Transaction Agreement, and the consummation
of the Merger or any other transaction contemplated hereby will cause (a) the
Camco Rights to become exercisable under the Rights Agreement, (b) Schlumberger
or any of its Subsidiaries to be deemed an "Acquiring Person" (as defined in the
Rights Agreement), (c) the provisions of Section 11 or Section 13 of the Rights
Agreement to become applicable to any such event or (d) the "Distribution Date"
or the "Share Acquisition Date" (each as defined in the Rights Agreement) to
occur upon any such event, and so that the "Expiration Date" (as defined in the
Rights Agreement) of the Camco Rights will occur 

                                      -15-
<PAGE>
 
immediately prior to the Effective Time. Without the prior written consent of
Schlumberger, neither the Board of Directors of Camco nor Camco shall take any
other action to terminate the Rights Agreement, redeem the Camco Rights, cause
any person not to be or become an "Acquiring Person" or otherwise amend the
Rights Agreement in a manner, or take any other action under the Rights
Agreement, adverse to Schlumberger.

      4.12     Stock Options.  Schlumberger shall take all corporate action
necessary to reserve for issuance a sufficient number of shares of Schlumberger
Common Stock for delivery upon exercise of the Camco Stock Options assumed by
STC in accordance with Section 2.1(d) and Section 5.5 of the Merger Agreement.
As soon as possible after the Effective Time, Schlumberger shall file with the
SEC a registration statement on Form S-8 (or any successor form) with respect to
the shares of Schlumberger Common Stock subject to the Camco Stock Options.

                                   ARTICLE V

                              CONDITIONS PRECEDENT

      5.1 Conditions to Camco's Closing Deliveries.  The obligations of Camco
under Section 5.2 hereof are subject to the conditions that the Merger Agreement
shall not have been terminated, that each of the conditions set forth in Article
VI of the Merger Agreement other than those conditions to be satisfied at the
Closing shall have been satisfied or waived as set forth therein and that each
of the following conditions shall have been satisfied or waived by Camco:

           (a) Representations and Warranties.  Each of the representations and
     warranties of Schlumberger set forth in this Transaction Agreement shall be
     true and correct in all material respects as of the date of this
     Transaction Agreement and (except to the extent such representations and
     warranties speak as of an earlier date) as of the Delivery Date as though
     made on and as of the Delivery Date, except where the failure to be so true
     and correct (without giving effect to the individual materiality thresholds
     otherwise contained in Section 3.2 hereof) would not have a Material
     Adverse Effect on Schlumberger (such that the aggregate of the Material
     Adverse Effect on Schlumberger hereunder exceeds $400 million) and
     Schlumberger shall have received a certificate dated the Delivery Date by a
     duly authorized officer of Schlumberger to that effect.

           (b) Performance of Obligations of Schlumberger.  Schlumberger shall
     have performed in all material respects all obligations required to be
     performed by it under this Transaction Agreement at or prior to the
     Delivery Date.

           (c) Certifications and Opinion.  Schlumberger shall have furnished
     Camco with:

               (i) a certified copy of a resolution or resolutions duly adopted
          by the Board of Directors or a duly authorized committee thereof of
          Schlumberger approving this Transaction Agreement and the transactions
          contemplated hereby; and

                                      -16-
<PAGE>
 
               (ii) a favorable opinion, dated the Closing Date, in customary
          form and substance, of David S. Browning, Esquire, General Counsel of
          Schlumberger, to the effect that:

                    (A) Schlumberger is a corporation duly incorporated, validly
               existing and in good standing under the laws of its jurisdiction
               of incorporation and has corporate power to own its properties
               and assets and to carry on its business as presently conducted
               and as described in the Registration Statement; and the execution
               and delivery of this Transaction Agreement did not, and the
               consummation of the transactions contemplated hereby will not,
               violate any provision of Schlumberger's Certificate of
               Incorporation or Bylaws;

                    (B) the Board of Directors of Schlumberger has taken all
               action required under its jurisdiction of incorporation, its
               Certificate of Incorporation or its Bylaws to authorize the
               execution and delivery of this Transaction Agreement and the
               transactions contemplated hereby; and this Transaction Agreement
               is a valid and binding agreement of Schlumberger enforceable in
               accordance with its terms, except as such enforceability may be
               limited by bankruptcy, insolvency, reorganization, moratorium or
               other similar laws or judicial decisions now or hereafter in
               effect relating to creditors' rights generally or governing the
               availability of equitable relief; and

                    (C) the Schlumberger Shares to be delivered to the holders
               of Camco Common Stock pursuant to Article II of the Merger
               Agreement are duly authorized and when issued and delivered as
               contemplated by the Merger Agreement will be legally and validly
               issued and fully paid and nonassessable and no stockholders of
               Schlumberger shall have any preemptive rights with respect
               thereto either pursuant to the organizational documents of
               Schlumberger or under applicable law of the jurisdiction of
               Schlumberger's organization.

          (d) Fairness Opinion.  Morgan Stanley & Co. Incorporated has not
revoked, modified or changed its opinion referred to in Section 3.1(p) of the
Merger Agreement in any manner adverse to the holders of the Common Stock of
Camco.

      5.2 Conditions to Schlumberger's Closing Deliveries.  The obligations of
Schlumberger under Section 2.1 and Section 5.1 hereof are subject to the
conditions that the Merger Agreement shall not have been terminated, that each
of the conditions set forth in Article VI of the Merger Agreement other than
those conditions to be satisfied at Closing shall have been satisfied or waived
as set forth therein and that each of the following conditions shall have been
satisfied or waived by Schlumberger:

                                      -17-
<PAGE>
 
           (a) Representations and Warranties.  Each of the representations and
     warranties of Camco set forth in this Transaction Agreement shall be true
     and correct in all material respects as of the date of this Transaction
     Agreement and (except to the extent such representations and warranties
     speak as of an earlier date) as of the Delivery Date as though made on and
     as of the Deliver Date, except where the failure to be so true and correct
     (without giving effect to the individual materiality thresholds otherwise
     contained in Section 3.1 hereof) would not have a Material Adverse Effect
     on Camco (such that the aggregate of the Material Adverse Effect on Camco
     hereunder exceeds $200 million)  and Schlumberger shall have received a
     certificate dated the Delivery Date on behalf of Camco by the chief
     executive officer and chief financial officer of Camco to that effect.

           (b) Performance of Obligations of Camco.  Camco shall have performed
     in all material respects all obligations required to be performed by it
     under this Transaction Agreement at or prior to the Delivery Date.

           (c) Certifications and Opinion.  Camco shall have furnished
     Schlumberger with:

               (i) a certified copy of a resolution or resolutions duly adopted
          by the Board of Directors of Camco approving this Transaction
          Agreement and consummation of the transactions contemplated hereby;
          and

               (ii) a favorable opinion, dated the Delivery Date, in customary
          form and substance, of Ronald R. Randall, Esquire, General Counsel of
          Camco, to the effect that:

                    (A) the execution and delivery of this Transaction Agreement
               did not violate any provision of Camco's Certificate of
               Incorporation or Bylaws; and

                    (B) the Board of Directors of Camco has taken all action
               required by the DGCL and its Certificate of Incorporation or its
               Bylaws to authorize the execution and delivery of this
               Transaction Agreement and the transactions contemplated hereby;
               and this Transaction Agreement is a valid and binding agreement
               of Camco enforceable in accordance with its terms, except as such
               enforceability may be limited by bankruptcy, insolvency,
               reorganization, moratorium or other similar laws or judicial
               decisions now or hereafter in effect relating to creditors'
               rights generally or governing the availability of equitable
               relief.

                                      -18-
<PAGE>
 
                                   ARTICLE VI

                           TERMINATION AND AMENDMENT

      6.1 Termination.  This Transaction Agreement shall automatically terminate
if the Merger Agreement is terminated.  In addition, this Transaction Agreement
may be terminated:

          (a) by mutual written consent of Camco and Schlumberger, or by mutual
     action of their respective Boards of Directors;

          (b) by Schlumberger if (i) Camco shall have failed to comply in any
     material respect with any of the covenants or agreements contained in this
     Transaction Agreement to be complied with or performed by Camco at or prior
     to such date of termination (provided such breach has not been cured within
     30 days following receipt by Camco of notice of such breach and is existing
     at the time of termination of this Transaction Agreement); or (ii) any
     representations and warranties of Camco contained in this Transaction
     Agreement shall not have been true when made (provided such breach has not
     been cured within 30 days following receipt by Camco of notice of such
     breach and is existing at the time of termination of this Transaction
     Agreement) or on and as of the Effective Time as if made on and as of the
     Effective Time (except to the extent it relates to a particular date),
     except where the failure to be so true and correct (without giving effect
     to the individual materiality thresholds otherwise contained in Section 3.1
     hereof) would not have a Material Adverse Effect on Camco such that the
     aggregate of the Material Adverse Effect on Camco exceeds $200 million; and

          (c) by Camco if (i) Schlumberger shall have failed to comply in any
     material respect with any of the covenants or agreements contained in this
     Transaction Agreement to be complied with or performed by it at or prior to
     such date of termination (provided such breach has not been cured within 30
     days following receipt by Schlumberger of notice of such breach and is
     existing at the time of termination of this Transaction Agreement); or (ii)
     any representations and warranties of Schlumberger contained in this
     Transaction Agreement shall not have been true when made (provided such
     breach has not been cured within 30 days following receipt by Schlumberger
     of notice of such breach and is existing at the time of termination of this
     Transaction Agreement) or on and as of the Effective Time as if made on and
     as of the Effective Time (except to the extent it relates to a particular
     date), except where the failure to be so true and correct (without giving
     effect to the individual materiality thresholds otherwise contained in
     Section 3.2 hereof) would not have a Material Adverse Effect on
     Schlumberger such that the aggregate of the Material Adverse Effect on
     Schlumberger exceeds $400 million.

      6.2 Effect of Termination.   In the event of termination of this
Transaction Agreement by either Camco or Schlumberger as provided in Section
6.1, this Transaction Agreement shall forthwith become void and there shall be
no liability or obligation on the part of Schlumberger or 

                                      -19-
<PAGE>
 
Camco under this Termination Agreement except (a) with respect to Section 7.1,
and (b) to the extent that such termination results from the willful breach by a
party hereto of any of its representations or warranties or of any of its
covenants or agreements, in each case, as set forth in this Transaction
Agreement except as provided in Section 8.9. Nothing herein shall be construed
to limit any of the rights and obligations under the Merger Agreement.

      6.3 Amendment.  This Transaction Agreement may be amended by the parties
hereto, by action taken or authorized by their respective Boards of Directors,
at any time before or after approval of the matters presented in connection with
the Merger by the stockholders of Camco, but, after any such approval, no
amendment shall be made which by law requires further approval by such
stockholders without such further approval.  This Transaction Agreement may not
be amended except by an instrument in writing signed on behalf of each of the
parties hereto.

      6.4 Extension; Waiver.  At any time prior to the Effective Time, the
parties hereto, by action taken or authorized by their respective Boards of
Directors, may, to the extent legally allowed: (a) extend the time for the
performance of any of the obligations or other acts of the other parties hereto;
(b) waive any inaccuracies in the representations and warranties contained
herein or in any document delivered pursuant hereto; and (c) waive compliance
with any of the agreements or conditions contained herein.  Any agreement on the
part of a party hereto to any such extension or waiver shall be valid only if
set forth in a written instrument signed on behalf of such party.


                                  ARTICLE VII

                               GENERAL PROVISIONS

      7.1 Payment of Expenses.  Each party hereto shall pay its own expenses
incident to preparing for entering into and carrying out this Transaction
Agreement and the consummation of the transactions contemplated hereby, whether
or not the Merger shall be consummated, except that the filing fees with respect
to the Proxy Statement, and the S-4 shall be paid by Schlumberger.

      7.2 Nonsurvival of Representations, Warranties and Agreements.  None of
the representations, warranties and agreements in this Transaction Agreement or
in any instrument delivered pursuant to this Transaction Agreement shall survive
the Effective Time and any liability for breach or violation thereof shall
terminate absolutely and be of no further force and effect at and as of the
Effective Time, except for the agreements contained in Section 6.2 and this
Article VI and the representations, covenants and agreements contained in
Section 4.7.  The Confidentiality Agreements shall survive the execution and
delivery of this Transaction Agreement, and the provisions of the
Confidentiality Agreements shall apply to all information and material delivered
hereunder.

      7.3 Notices.  Any notice or communication required or permitted hereunder
shall be in writing and either delivered personally, telegraphed or telecopied
or sent by certified or registered 

                                      -20-
<PAGE>
 
mail, postage prepaid, and shall be deemed to be given, dated and received when
so delivered personally, telegraphed or telecopied or, if mailed, five business
days after the date of mailing to the following address or telecopy number, or
to such other address or addresses as such person may subsequently designate by
notice given hereunder:

          (a)  if to Schlumberger, to:

                    Schlumberger Limited
                    277 Park Avenue
                    New York, New York 10172
                    Attention: David S. Browning, Esquire
                    Fax: (212) 350-9457

               with a copy to:
 
                    Baker & Botts, L.L.P.
                    910 Louisiana, Suite 3000
                    Houston, Texas 77002
                    Attention: Moulton A. Goodrum, Esquire
                    Fax: (713) 229-1522

          and (b) if to Camco, to:

                    Camco International, Inc.
                    7030 Ardmore
                    Houston, Texas 77054
                    Attention: Ronald R. Randall, Esquire
                    Fax: (713) 749-5625

               with a copy to:

                    Fulbright & Jaworski L.L.P.
                    1301 McKinney, Suite 5100
                    Houston, Texas 77010
                    Attention: Michael C. Conlon, Esquire
                    Fax: (713) 651-5246

      7.4 Interpretation.  When a reference is made in this Transaction
Agreement to Sections, such reference shall be to a Section of this Transaction
Agreement unless otherwise indicated.  The table of contents, glossary of
defined terms and headings contained in this Transaction Agreement are for
reference purposes only and shall not affect in any way the meaning or
interpretation of this Transaction Agreement.  Whenever the word "include",
"includes" or "including" is used in this Transaction Agreement, it shall be
deemed to be followed by the words "without limitation."  The 

                                      -21-
<PAGE>
 
phrase "made available" in this Transaction Agreement shall mean that the
information referred to has been made available if requested by the party to
whom such information is to be made available.

      7.5  Counterparts.  This Transaction Agreement may be executed in two or
more counterparts, all of which shall be considered one and the same agreement,
and shall become effective when two or more counterparts have been signed by
each of the parties and delivered to the other parties, it being understood that
all parties need not sign the same counterpart.

      7.6  Entire Agreement; No Third-Party Beneficiaries.  This Transaction
Agreement (together with the Confidentiality Agreements, the Merger Agreement
and any other documents and instruments referred to herein) constitutes the
entire agreement and supersedes all prior agreements and understandings, both
written and oral, among the parties with respect to the subject matter hereto
and is not intended to confer upon any person other than the parties hereto any
rights or remedies hereunder.

      7.7  Governing Law.  This Transaction Agreement shall be governed and
construed in accordance with the laws of the State of Delaware, without giving
effect to the principles of conflicts of law thereof.

      7.8  No Remedy in Certain Circumstances.  Each party agrees that, should
any court or other competent authority hold any provision of this Transaction
Agreement or part hereof to be null, void or unenforceable, or order any party
to take any action inconsistent herewith or not to take an action consistent
herewith or required hereby, the validity, legality and enforceability of the
remaining provisions and obligations contained or set forth herein shall not in
any way be affected or impaired thereby, unless the foregoing inconsistent
action or the failure to take an action constitutes a material breach of this
Transaction Agreement or makes this Transaction Agreement impossible to perform,
in which case this Transaction Agreement shall terminate pursuant to Article VI
hereof.  Except as otherwise contemplated by this Transaction Agreement, to the
extent that a party hereto took an action inconsistent herewith or failed to
take action consistent herewith or required hereby pursuant to an order or
judgment of a court or other competent authority, such party shall not incur any
liability or obligation unless such party breached its obligations under Section
4.1 hereof or did not in good faith seek to resist or object to the imposition
or entering of such order or judgment.

      7.9  Assignment. Neither this Transaction Agreement nor any of the rights,
interests or obligations hereunder shall be assigned by any of the parties
hereto (whether by operation of law or otherwise) without the prior written
consent of the other parties. Subject to the preceding sentence, this
Transaction Agreement will be binding upon, inure to the benefit of and be
enforceable by the parties and their respective successors and assigns.

      7.10 Enforcement of the Agreement.  The parties agree that irreparable
damage would occur in the event that any of the provisions of this Transaction
Agreement were not performed in accordance with their specific terms or were
otherwise breached.  It is accordingly agreed that the 

                                      -22-
<PAGE>
 
parties shall be entitled to an injunction or injunctions to prevent breaches of
this Transaction Agreement and to enforce specifically the terms and provisions
hereof in any court of the United States located in the State of Delaware or in
the Chancery Court of the State of Delaware, 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 or state court sitting in Wilmington, Delaware 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 a Federal or state court sitting in
Wilmington, Delaware.
<PAGE>
 
     IN WITNESS WHEREOF, each party has caused this Transaction Agreement to be
signed by its respective officers thereunto duly authorized, all as of the date
first written above.

                       SCHLUMBERGER LIMITED
  
  
  
                       By: /s/ Victor e. Grijalva
                          ---------------------------------------------
                               Victor E. Grijalva
                               Vice Chairman
  
                       CAMCO INTERNATIONAL, INC.
  
  
  
                       By: /s/ Gilbert H. Tausch
                          ---------------------------------------------
                               Gilbert H. Tausch
                               President and Chief Executive Officer

<PAGE>

                                        Schlumberger N.V. (Schlumberger Limited)
                                        8-k  June 24, 1998  Exhibit 99.1 (2 pp.)

Schlumberger                    Press Release                   LOGO CAMCO
 
For Immediate Release: Friday, June 19, 1998

SCHLUMBERGER AND CAMCO ANNOUNCE MERGER AGREEMENT

New York, June 19--Schlumberger [NYSE:SLB] and Camco [NYSE:CAM] today announced
the signing of a definitive merger agreement by Schlumberger Technology
Corporation, a wholly owned subsidiary of Schlumberger, and Camco, which was
unanimously approved by the boards of directors of the companies. The combined
company will offer an unmatched array of oilfield services to its customers for
reservoir optimization throughout the world.

Under the terms of the agreement, Camco shareholders will receive 1.18 newly
issued shares of Schlumberger common stock for each outstanding share of Camco
common stock. The exchange ratio is fixed and not subject to adjustment. The
transaction is expected to be tax free to Camco shareholders and will be
accounted for as a pooling of interests. Based on the closing price of
Schlumberger yesterday at $69 15/16 and Camco's 38 million common shares
outstanding, the transaction is currently valued at about $3.14 billion.

Consolidated operating revenue and net income of Schlumberger and Camco would
have been approximately $11.6 billion and $1.38 billion in 1997. The current
combined market capitalization is approximately $37 billion. Camco will be
operated as a division within the Schlumberger Oilfield Services group.

Euan Baird, Chairman and Chief Executive officer of Schlumberger, said, "This
combination provides an exciting opportunity to further enhance our position as
the leader in the reservoir optimization business. The highly complementary
activities of Camco improve our capability to respond to customers' demands for
integrated solutions and to engineer systems to improve the productivity of
their oil and gas operations."

Gilbert Tausch, Chairman and Chief Executive Officer of Camco, said, "This
merger satisfies Camco's strategic plan to be able to participate in more phases
of our customers' field operations. Camco will be able to add its technology of
production operations to the well known technology of Schlumberger in areas of
reservoir enhancement. We have practically no overlap of operations and have
worked successfully with Schlumberger in many areas of the world".

Schlumberger and Camco have historically been the most profitable companies in
their peer group. Both companies have an extensive geographic presence
worldwide, exhibit an excellent cultural fit and share strengths in
relationships with customers, governments and suppliers.

The merger will enhance services for customers, broaden opportunities for
employees, and add value for shareholders. The transaction is expected to be
accretive to earnings per share
<PAGE>
 
in 1999, which is anticipated to be the first full year of combined operations.
It is subject to the approval of Camco shareholders as well as customary
regulatory approvals. The transaction is expected to close around the end of the
third quarter of 1998.

Schlumberger is a worldwide leader in technical services with 63,500 employees
and operations in over 100 countries. In 1997, revenue was $10.65 billion.

Camco International Inc. is a worldwide oilfield equipment and service company
providing specialized products and services in drilling, well completion,
production and well services for the oil and gas industry. Camco's trade names
include Camco Coiled Tubing Services, Camco Products, Camco Wireline, Hycalog,
Lasalle Engineering, Lawrence Technology, Production Operators, Reda, Reed Tool
and Site Oil Tools.

                                     # # #

For further information, contact:
- ---------------------------------

Simone Crook
Director Investor Relations & Communications
Schlumberger Limited New York
Phone: (1-212) 350-9432
Email: [email protected]

Claude Suter
Investor Relations & Communications
Schlumberger Limited Paris
Phone: (33-1) 40 62 13 30

Email: [email protected]
Bruce Longaker
Vice President, Finance
Camco International, Inc. - Houston
Phone: (1-713) 749-5650

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