SMITH INTERNATIONAL INC
S-8, 1999-04-20
MISCELLANEOUS CHEMICAL PRODUCTS
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<PAGE>   1
     AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON APRIL 20, 1999

                                                   Registration No. 333-_______
===============================================================================

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                             ----------------------

                                    FORM S-8

                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933


                           SMITH INTERNATIONAL, INC.
               (Exact name of registrant as specified in charter)


                  DELAWARE                                    95-3822631
(State or other jurisdiction of incorporation)             (I.R.S. Employer
                                                          Identification No.)

             16740 HARDY STREET
                HOUSTON, TEXAS                                  77032
  (Address of principal executive offices)                    (Zip Code)


                           SMITH INTERNATIONAL, INC.
                            1989 LONG-TERM INCENTIVE
                               COMPENSATION PLAN
                            (Full title of the plan)


                                 NEAL S. SUTTON
     SENIOR VICE PRESIDENT - ADMINISTRATION, GENERAL COUNSEL AND SECRETARY
                           SMITH INTERNATIONAL, INC.
                               16740 HARDY STREET
                              HOUSTON, TEXAS 77032
                                 (281) 443-3370
           (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                             ----------------------


                        CALCULATION OF REGISTRATION FEE*
<TABLE>
<CAPTION>
====================================================================================================================
                                                                   PROPOSED          PROPOSED
                                                                   MAXIMUM           MAXIMUM
                                               AMOUNT TO BE     OFFERING PRICE      AGGREGATE           AMOUNT OF
   TITLE OF SECURITIES TO BE REGISTERED         REGISTERED      PER SHARE (1)   OFFERING PRICE (1)  REGISTRATION FEE
- --------------------------------------------------------------------------------------------------------------------
<S>                                         <C>                 <C>             <C>                <C>       
Common Stock, par value $1.00 per share      2,400,000 shares    $38.44         $92,256,000         $25,648
====================================================================================================================
</TABLE>

(1)  Estimated solely for the purpose of calculating the registration fee,
     based upon the average of the high and low prices of a share of the
     Company's common stock on the New York Stock Exchange on April 13, 1999,
     pursuant to Rule 457(c) and Rule 457(h).

*    Shares of common stock of the registrant for issuance to full-time
salaried employees of the registrant who are performing management,
supervisory, sales, scientific or engineering services or who are key employees
of the registrant pursuant to the Smith International, Inc. 1989 Long-Term
Incentive Compensation Plan have been previously registered under a
Registration Statement on Form S-8 (Registration No. 33-31556) and a
Registration Statement on Form S-8 (Registration No. 33-56693). The number of
shares of common stock being carried forward is 2,500,000, and the filing fees
associated with such shares that were previously paid with the earlier
registration statements were $2,812.50 with Registration No. 33-31556 and
$7,241.38 with Registration No. 33-56693.


<PAGE>   2

     On February 4, 1998, the Board of Directors of the Company adopted,
subject to stockholder approval, an amendment to the Smith International, Inc.
1989 Long-Term Incentive Compensation Plan to increase from 2,500,000 to
4,900,000 the aggregate number of shares of the Company's common stock, $1.00
par value, reserved for issuance under the plan and to extend the expiration
date of the plan to April 22, 2008. The amendment of the plan was approved by
the stockholders of the Company at the Annual Meeting of Stockholders held on
April 22, 1998. The contents of the Company's Registration Statement on Form
S-8 (File No. 33-31556) filed with the Securities and Exchange Commission on
October 13, 1989, and the contents of the Company's Registration Statement on
Form S-8 (File No. 33-56693) filed with the Securities and Exchange Commission
on December 1, 1994, relating to the plan, including the documents incorporated
by reference therein, are incorporated by reference into this registration
statement.


                                    PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 8.  EXHIBITS.

     In addition to the exhibits filed or incorporated by reference into the
Registration Statement on Form S-8 dated October 13, 1989, and the Registration
Statement on Form S-8 dated December 1, 1994, the following documents are filed
as exhibits to this registration statement:

     4.1     Restated Certificate of Incorporation of the Company as amended to
             date. Filed as Exhibit 3.1 to the Company's report on Form 10-K
             for the year ended December 31, 1993 and incorporated herein by
             reference.

     4.2     Bylaws of the Company as amended to date. Filed as Exhibit 3.1 to
             the Company's report on Form 8-K dated August 13, 1998 (and filed
             on August 14, 1998) and incorporated herein by reference.

     4.3     Rights Agreement, dated as of June 19, 1990, between the Company
             and First Chicago Trust Company of New York. Filed as Exhibit 4.1
             to the Company's report on Form 10-K for the year ended December
             31, 1997 and incorporated herein by reference.

     *4.4    Smith International, Inc. 1989 Long-Term Incentive Compensation
             Plan, as amended.

     *5.1    Opinion of counsel regarding legality.

     *23.1   Consent of Arthur Andersen LLP.

     *23.2   Consent of counsel (included in the opinion of counsel, filed
             herewith as Exhibit 5.1).

     *24.1   Power of Attorney (set forth on the signature page of this
             registration statement).

- ---------------------
*Filed herewith.


ITEM 9.  UNDERTAKINGS.

     (a) Undertaking to Update

         The undersigned registrant hereby undertakes:


<PAGE>   3

          (1) To file, during any period in which offers or sales are being
     made, a post-effective amendment to this registration statement:

               (i) To include any prospectus required by Section 10(a)(3) of
          the Securities Act of 1933.

               (ii) To reflect in the prospectus any facts or events arising
          after the effective date of the registration statement (or the most
          recent post-effective amendment thereof) which, individually or in
          the aggregate, represent a fundamental change in the information set
          forth in the registration statement. Notwithstanding the foregoing,
          any increase or decrease in volume of securities offered (if the
          total dollar value of securities offered would not exceed that which
          was registered) and any deviation from the low or high end of the
          estimated maximum offering range may be reflected in the form of
          prospectus filed with the Commission pursuant to Rule 424(b) if, in
          the aggregate, the changes in volume and price represent no more than
          a 20 percent change in the maximum aggregate offering price set forth
          in the "Calculation of Registration Fee" table in the effective
          registration statement.

               (iii) To include any material information with respect to the
          plan of distribution not previously disclosed in the registration
          statement or any material change to such information in the
          registration statement;

     provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply
     if the registration statement is on Form S-3, Form S-8 or Form F-3, and
     the information required to be included in a post-effective amendment by
     those paragraphs is contained in periodic reports filed with or furnished
     to the Commission by the registrant pursuant to Section 13 or 15(d) of the
     Securities Exchange Act of 1934 that are incorporated by reference in the
     registration statement.

          (2) That, for the purpose of determining any liability under the
     Securities Act of 1933, each such post-effective amendment shall be deemed
     to be a new registration statement relating to the securities offered
     therein, and the offering of such securities at that time shall be deemed
     to be the initial bona fide offering thereof.

          (3) To remove from registration by means of a post-effective
     amendment any of the securities being registered which remain unsold at
     the termination of the offering.

     (b) Undertaking With Respect to Documents Incorporated by Reference

          The undersigned registrant hereby undertakes that, for purposes of
     determining any liability under the Securities Act of 1933, each filing of
     the registrant's annual report pursuant to Section 13(a) or Section 15(d)
     of the Securities Exchange Act of 1934 (and, where applicable, each filing
     of an employee benefit plan's annual report pursuant to Section 15(d) of
     the Securities Exchange Act of 1934) that is incorporated by reference in
     the registration statement shall be deemed to be a new registration
     statement relating to the securities offered therein, and the offering of
     such securities at that time shall be deemed to be the initial bona fide
     offering thereof.

     (c) Undertaking With Respect to Indemnification

          Insofar as indemnification for liabilities arising under the
     Securities Act of 1933 may be permitted to directors, officers and
     controlling persons of the registrant pursuant to the foregoing provision,
     or otherwise, the registrant has been advised that in the opinion of the
     Commission such indemnification is against public policy as expressed in
     the Securities Act of 1933 and is, therefore, unenforceable. In the event
     that a claim for indemnification against such liabilities (other than the
     payment by the registrant of expenses incurred or paid by a director,
     officer or controlling person of the registrant in the successful defense
     of any action, suit or proceeding) is asserted by such director, officer
     or controlling person in connection with the securities being registered,
     the registrant will, unless in the opinion of its counsel the matter has
     been settled by controlling precedent, submit to a court of appropriate
     jurisdiction the question whether such indemnification by it is against
     public policy as expressed in the Securities Act of 1933 and will be
     governed by the final adjudication of such issue.



                                      II-2

<PAGE>   4

                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, as amended,
the registrant certifies that it has reasonable grounds to believe that it
meets all of the requirements for filing on Form S-8 and has duly caused this
registration statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Houston, State of Texas, on April 19, 1999.

                                  SMITH INTERNATIONAL, INC.


                                  By: /s/ DOUGLAS L. ROCK
                                      --------------------------------------
                                      Douglas L. Rock,
                                      Chairman of the Board, Chief Executive
                                      Officer, President and Director


                               POWER OF ATTORNEY

     Each of the undersigned hereby appoints Douglas L. Rock, Loren K. Carroll,
Neal S. Sutton and John J. Kennedy, or each of them (with full power to each of
them to act alone), his true and lawful attorney-in-fact and agent, with full
power of substitution, for him and on his behalf and in his name, place and
stead, in any and all capacities, to sign, execute and file this registration
statement under the Securities Act of 1933, as amended, and any and all
amendments and exhibits to this registration statement and any other documents
to be filed with respect thereto, with the Securities and Exchange Commission
or any regulatory authority, granting unto such attorneys-in-fact and agents,
and each of them, full power and authority to do and perform each and every act
and thing requisite and necessary to be done in order to effectuate the same,
as fully as to all intents and purposes as he himself might or could do if
personally present, hereby ratifying and confirming all that such
attorneys-in-fact and agents, or any of them, or their substitute or
substitutes, may lawfully do or cause to be done.

     Pursuant to the requirements of the Securities Act of 1933, as amended,
this registration statement has been signed by the following persons in the
capacities indicated on April 19, 1999.

          SIGNATURE                                     TITLE

      /s/ DOUGLAS L. ROCK                    Chairman of the Board, Chief
- --------------------------------               Chief Executive Officer,
        Douglas L. Rock                         President and Director
                                             

     /s/ LOREN K. CARROLL                 Executive Vice President and Director
- --------------------------------
       Loren K. Carroll

     /s/ JOHN J. KENNEDY                        Senior Vice President,
- --------------------------------              Chief Financial Officer and
        John J. Kennedy                                Treasurer
                                                       

    /s/ BENJAMIN F. BAILAR                              Director
- --------------------------------
      Benjamin F. Bailar

       /s/ G. CLYDE BUCK                                Director
- --------------------------------
         G. Clyde Buck

      /s/ JAMES R. GIBBS                                Director
- --------------------------------
        James R. Gibbs

      /s/ JERRY W. NEELY                                Director
- --------------------------------
        Jerry W. Neely

     /s/ WALLACE S. WILSON                              Director
- --------------------------------
       Wallace S. Wilson


                                      II-3

<PAGE>   5

                                 EXHIBIT INDEX


<TABLE>
<CAPTION>
EXHIBIT
  NO.             DESCRIPTION
- -------           -----------
<S>               <C>
4.1      --       Restated Certificate of Incorporation of the Company as
                  amended to date. Filed as Exhibit 3.1 to the Company's report
                  on Form 10-K for the year ended December 31, 1993 and
                  incorporated herein by reference.

4.2      --       Bylaws of the Company as amended to date. Filed as Exhibit 3.1
                  to the Company's report on Form 8-K dated August 13, 1998 (and
                  filed on August 14, 1998) and incorporated herein by
                  reference.

4.3      --       Rights Agreement, dated as of June 19, 1990, between the
                  Company and First Chicago Trust Company of New York. Filed as
                  Exhibit 4.1 to the Company's report on Form 10-K for the year
                  ended December 31, 1997 and incorporated herein by reference.

*4.4     --       Smith International, Inc. 1989 Long-Term Incentive
                  Compensation Plan, as amended.

*5.1     --       Opinion of counsel regarding legality.

*23.1    --       Consent of Arthur Andersen LLP.

*23.2    --       Consent of counsel (included in the opinion of counsel, filed
                  herewith as Exhibit 5.1).

*24.1    --       Power of Attorney (set forth on the signature page of this 
                  registration statement).
</TABLE>

- ---------------------
*Filed herewith.


<PAGE>   1
                                                                    EXHIBIT 4.4

                           SMITH INTERNATIONAL, INC.
                   1989 LONG-TERM INCENTIVE COMPENSATION PLAN
                       (As Amended as of April 22, 1998)


 1.      PURPOSE OF THE PLAN

         The purpose of the 1989 Long-Term Incentive Compensation Plan (the
 "Plan") is to advance the interests of Smith International, Inc. (the
 "Company") and its shareholders by strengthening the ability of the Company to
 attract and retain in its employ persons of training, experience and ability,
 and to furnish additional incentives to officers and valued employees of the
 Company upon whose judgment, initiative and efforts the successful conduct and
 development of the business of the Company largely depends.


 2.      DEFINITIONS

         Whenever the following terms are used in this Plan, they shall have
 the meaning specified below unless the context clearly indicates to the
 contrary.

          "Board of Directors" shall mean the Board of Directors of the Company.

          "Cash Award" shall mean a cash award granted pursuant to Section 1 of
the Plan.

          "Committee" shall mean the Compensation and Benefits Committee of the
 Board of Directors, unless the Board of Directors appoints another committee
 to administer the Plan.

          "Common Stock" shall mean the common shares, $1.00 par value of the
 Company and any class of common shares into which such common shares may
 hereafter be converted.

          "Company" shall mean Smith International, Inc.

          "Director" shall mean a member of the Board of Directors.

          "Disinterested Person" shall have the meaning assigned to that term
under the rules and regulations of the Securities and Exchange Commission under
the Securities Exchange Act of 1934.

          "Eligible Person" shall mean a person eligible to receive an
Incentive Award.

          "Employee" shall mean any employee of the Company, or of any of its
present or future parent or subsidiary corporations, or a corporation (or a
parent or subsidiary corporation of such corporation) issuing or assuming an
Option in a transaction to which Section 425(a) of the Internal Revenue Code
applies, whether such Employee is so employed at the time this Plan is adopted
or becomes so employed subsequent to adoption of this Plan.

                                       1
<PAGE>   2

          "Fair Market Value" shall mean the average of the high and low prices
of a share of Common Stock on the New York Stock Exchange on the date as of
which fair market value is to be determined, or if no such sales were made on
such date, the closing price of such shares on the New York Stock Exchange on
the next preceding date on which there were such sales; provided, however, that
the Committee may utilize such other listing or reporting services that in its
judgment provide an accurate index of the fair market value of the Common
Stock.

          "Holder" shall mean a person holding an Incentive Award.

          "Incentive Award" shall mean an Option, Stock Appreciation Right,
Restricted Stock, Stock Award or Cash Award granted under the Plan.

          "Nonstatutory Stock Option" shall mean an option granted pursuant to
Section 7 of the Plan.

          "Option" shall mean a Nonstatutory Stock Option.

          "Optionee" shall mean any person holding an Option granted under the
Plan.

          "Parent corporation" and "subsidiary corporation" shall have the
meanings assigned to them in Sections 425(e) and 425(f) of the Internal Revenue
Code.

          "Plan" shall mean the Smith International, Inc. 1989 Long-Term
Incentive Compensation Plan as set forth herein, as the same may be amended
from time to time.

          "Stock Appreciation Right" shall mean a right granted pursuant to
Section 8 or Section 9 of the Plan to receive a number of shares of Common
Stock or, in the discretion of the Committee, an amount of cash or a
combination of shares and cash, based on the increase in the Fair Market Value
of the shares subject to the right.

          "Stock Award" shall mean a stock award granted pursuant to Section 10
of the Plan.


3.        SHARES OF COMMON STOCK SUBJECT TO THE PLAN

          (a) Subject to the provisions of Section 3(c) and Section 12 of the
Plan, the aggregate number of shares of Common Stock that may be issued or
transferred or as to which Stock Appreciation rights may be exercised pursuant
to Incentive Awards under the Plan shall not exceed 4,900,000.

          (b) The shares to be delivered under the Plan shall be made
available, at the discretion of the Board of Directors or the Committee, either
from authorized but unissued shares of Common Stock or from previously issued
shares of Common Stock reacquired by the Company, including shares purchased on
the open market. Common Stock issued under the Plan in connection with
restricted stock or stock awards shall be issued shares held as treasury
shares.


                                       2
<PAGE>   3

          (c) If any shares of Common Stock subject to an Option are not issued
or transferred and cease to be issuable or transferable for any reason, the
shares not so issued or transferred shall no longer be charged against the
limitation provided for in Section 3(a) and may again be made subject to
Incentive Awards. However, shares as to which an Option has been surrendered in
connection with the exercise of a related Stock Appreciation Right shall not
again be available for the grant of any further Incentive Awards. If a Stock
Appreciation Right not related to an Option expires or terminates without
having been exercised, then the number of shares of Common Stock with respect
to which the unexercised portion of such Stock Appreciation Right was granted
shall no longer be charged against the limitation provided for in Section 3(a)
and may again be made subject to Incentive Awards.

          (d) The Committee may, in its discretion, determine to cancel, and
agree to the cancellation of, Options in order to make a participant eligible
for the grant of an Option at a lower price than the option cancelled.

          (e) In the event that shares of Common Stock are issued as restricted
stock or pursuant to a stock award and thereafter are forfeited or reacquired
by the Company pursuant to rights reserved upon issuance thereof, such
forfeited and reacquired shares may again be issued under the Plan, either as
restricted stock, pursuant to stock awards or otherwise.


4.        ADMINISTRATION OF THE PLAN

          (a) The Plan shall be administered by the Committee, which shall
consist of three or more persons (i) who are not eligible to receive Incentive
Awards under the Plan, (ii) who have not been eligible, at any time within one
year prior to appointment to the Committee, for selection as persons to whom
Incentive Awards may be granted pursuant to the Plan or to whom shares may be
allocated or stock options or stock appreciation rights may be granted pursuant
to any other plan of the Company or any of its affiliates entitling the
participants therein to acquire stock, stock appreciation rights or options of
the Company or any of its affiliates and (iii) who are Disinterested Persons.
All members of the Committee shall be Disinterested Persons. The Board of
Directors may from time to time remove members from, or add members to, the
Committee. Vacancies on the Committee, however caused, shall be filled only by
the Board of Directors. The Board of Directors may take any action permitted to
be taken by the Committee if a majority of the Directors are Disinterested
Persons.

          (b) The Committee shall have and may exercise such powers and
authority of the Board of Directors as may be necessary or appropriate for the
Committee to carry out its functions as described in the Plan, and any
references in the Plan to any specific power or authority of the Committee
shall not derogate from the foregoing. The Committee shall have authority in
its discretion to determine the Eligible Persons to whom, and the time or times
at which, Incentive Awards may be granted and the number of shares subject to
each Incentive Award. Subject to the express provisions of the Plan, the
Committee shall also have authority to interpret the Plan, to prescribe, amend
and rescind rules and regulations relating to it, to determine the terms and
provisions of the respective Incentive Award agreements (which need not be
identical) and to make all other determinations necessary or advisable for the
administration of the Plan. All 


                                       3
<PAGE>   4

interpretations, determinations and actions by the Committee shall be final,
conclusive and binding upon all parties.

          (c) No member of the Board of Directors or the Committee shall be
liable for any action or determination made in good faith by the Board of
Directors or the Committee with respect to the Plan or any Incentive Award
thereunder.


5.        ELIGIBILITY

          (a) All full-time salaried Employees (including officers and
directors, but excluding directors of the Company who are not also full-time
employees of the Company) who are engaged in performing management,
supervisory, sales, scientific or engineering services or who have been
determined by the Committee to be key Employees are eligible to receive
Incentive Awards under the Plan. Eligible employees may be designated
individually or by groups or categories (for example, by pay grade) as the
Committee deems appropriate. Participation by officers of the Company and any
performance objectives relating to such officers must be approved by the
Committee. Participation by persons other than officers and any performance
objectives relating thereto may be approved by groups or categories (for
example, by pay grade) and authority to designate participants who are not
officers and to set or modify such targets may be delegated. The Committee
shall have authority, in its sole discretion, to determine and designate from
time to time those Eligible Persons who are to be granted Incentive Awards, the
type of Incentive Award to be granted, and the number of shares of Common Stock
or the amount of cash subject to each Incentive Award. In making such
determinations, the Committee may take into account the nature of the services
rendered by the respective Eligible Persons, their present and potential
contributions to the Company's success and such other factors as the Committee
in its sole discretion shall deem relevant.

          (b) An Eligible Person who has been granted an Incentive Award may,
if he is otherwise eligible, be granted an additional Incentive Award.


6.        FORMS OF INCENTIVE AWARDS

          Incentive Awards may be granted in the following forms:

               (a) Nonstatutory Stock Option in accordance with Section 7 of
the Plan;

               (b) Stock Appreciation Right, related to an Option in accordance
with Section 8 of the Plan;

               (c) Stock Appreciation Right not related to an Option in
accordance with Section 9 of the Plan;

               (d) Stock Award in accordance with Section 10 of the Plan;

               (e) Restricted Stock in accordance with Section 10 of the Plan;

                                       4
<PAGE>   5

               (f) Cash Award in accordance with Section 1 of the Plan; or

               (g) Any combination of the foregoing.


7.        NONSTATUTORY STOCK OPTIONS

          The Committee may at any time and from time to time approve the grant
by the Company of Nonstatutory Stock Options to Eligible Persons to purchase
shares of Common Stock of the Company, and determine the specific Eligible
Persons to whom such Options may be granted, the number of shares subject to
each Option, the terms and provisions of the Option agreement, and the time or
times at which such Options may be exercised, subject to the following terms
and conditions:

          (a) The date of grant shall be the date the Committee takes the
necessary action to approve the grant; provided, however, that if the minutes
or appropriate resolutions of the Committee provide that an Option is to be
granted as of a date in the future, the date of grant shall be such future
date. In any event, the intended Optionee must be an Eligible Person on the
date of grant.

          (b) The purchase price of Common Stock under each Nonstatutory Stock
Option shall be determined by the Committee, and will have an exercise price of
not less than the Fair Market Value of the Common Stock on the date the Option
is granted, subject to adjustment as provided in section 12 below. Options
cannot be cancelled and regranted at a lower price.

          (c) Each Nonstatutory Stock Option shall become exercisable at such
time or times during its term as shall be determined by the Committee at the
time of grant. The Committee may accelerate the exercisability of any stock
option. Subject to the foregoing and with the approval of the Committee, all or
any part of the shares of Common Stock with respect to which the right to
purchase has accrued may be purchased by the Company at the time of such
accrual or at any time or times thereafter during the term of the Option.

          (d) No Nonstatutory Stock Option may be exercised after ten years
from the date the Option is granted.

          (e) Upon the exercise of a Nonstatutory Stock Option, the purchase
price shall be payable in full in cash or its equivalent acceptable to the
Company. In the discretion of the Committee, the purchase price may be paid by
the assignment and delivery to the Company of shares of Common Stock or a
combination of cash and such shares equal in value to the Option exercise
price. Any shares so assigned and delivered to the Company in payment or
partial payment of the purchase price shall be valued at their Fair Market
Value on the exercise date.

          (f) No fractional shares shall be issued pursuant to the exercise of
a Nonstatutory Stock Option, nor shall any cash payment be made in lieu
thereof.


                                       5
<PAGE>   6

          (g) A Nonstatutory Stock Option shall not be assignable or
transferable by the Optionee to whom granted otherwise than by will or the laws
of descent and distribution, and may be exercised during the lifetime of the
Optionee only by the Optionee.

          (h) No person shall have the rights and privileges of a shareholder
with respect to shares subject to or purchased under a Nonstatutory Stock
Option until the date appearing on the stock certificate issued upon the
exercise of the Option.

          (i) To the extent that a Nonstatutory Stock Option is exercised, any
related Stock Appreciation Right shall be proportionately reduced by a number
of shares equal to the number of shares with respect to which the Option is
exercised.

          j) Upon approval of the Committee, the Company may repurchase a
previously granted stock option from an Optionee by mutual agreement before
such option has been exercised by payment to the Optionee of the amount per
share by which: (i) the Fair Market Value of the Common Stock subject to the
option on the date of purchase exceeds (ii) the option price.

          (k) Each Nonstatutory Stock Option shall be evidenced by a written
agreement and may, but need not, include any other terms and conditions not
inconsistent with the Plan as the Committee may approve.


8.        STOCK APPRECIATION RIGHTS RELATED TO OPTIONS

          The Committee may at any time and from time to time approve the grant
by the Company of Stock Appreciation Rights to Eligible Persons that are
related to Nonstatutory Stock Options, and determine the specific Eligible
Persons to whom Stock Appreciation Rights may be granted, the terms and
provisions of the Stock Appreciation Rights agreements, and the time or times
at which such Stock Appreciation Rights may be exercised, subject to the
following terms and conditions:

          (a) The date of grant shall be the date the Committee takes the
necessary action to approve the grant; provided, however, that, if the minutes
of appropriate resolutions of the Committee provide that a Stock Appreciation
Right is to be granted as of a date in the future, the date of grant shall be
such future date. In any event, the intended Optionee must be an Eligible
Person on the date of grant.

          (b) A Stock Appreciation Right may be granted in connection with a
Nonstatutory Stock Option, either at the time of the grant of such Option or at
any time thereafter during the term of the Option.

          (c) A Stock Appreciation Right shall entitle the Holder of the
related Option, upon exercise of the Stock Appreciation Right, to surrender
such Option, or any portion thereof to the extent unexercised (subject to a
limitation of 50% of the shares of Common Stock subject to the Option), with
respect to the number of shares as to which Stock Appreciation Right is
exercised, 

                                       6
<PAGE>   7

and to receive payment of an amount computed pursuant to Section 8(e). Such
Option shall, to the extent so surrendered, thereupon cease to be exercisable.

          (d) Subject to Section 8(g), a Stock Appreciation Right granted
hereunder shall be exercisable at such time or times, and only to the extent,
that a related Option is exercisable and shall not be transferable except to
the extent that such related Option may be transferable. The Stock Appreciation
Right shall be exercisable only by the Holder thereof or by such other person
entitled to exercise the related Option in the event of the death of the
Holder.

          (e) Subject to the right of the Committee to deliver cash in lieu of
shares of Common Stock, the number of shares of Common Stock which shall be
issuable upon the exercise of a Stock Appreciation Right shall be determined by
dividing:

                  (i) the number of shares of Common Stock as to which the
          Stock Appreciation Right is exercised multiplied by the amount of the
          appreciation in such shares (for this purposes the "appreciation"
          shall be the amount by which the Fair Market Value of the shares of
          Common Stock subject to the Stock Appreciation Right on the exercise
          date exceeds an amount which shall be determined by the Committee at
          the time of grant; by

                  (ii) the Fair Market Value of a share of Common Stock on the
          exercise date.

          (f) In lieu of issuing shares of Common Stock upon the exercise of a
Stock Appreciation Right, the Committee may elect to pay the holder of the
Stock Appreciation Right cash equal to the Fair Market Value on the exercise
date of any or all of the shares which would otherwise be issuable. No
fractional shares of Common Stock shall be issued upon the exercise of a Stock
Appreciation Right; instead, the holder of the Stock Appreciation Right shall
be entitled to receive a cash adjustment equal to the same fraction of the Fair
Market Value of a share of Common Stock on the exercise date or to purchase the
portion necessary to make a whole share at its Fair Market Value on the date of
exercise.

          (g) The Committee may impose such conditions on the exercise of a
Stock Appreciation Right as may be required to satisfy the requirements of Rule
16b-3 under the Securities Exchange Act of 1934 (or any other comparable
provisions in effect at the time or times in question). Without limiting the
generality of the foregoing, the Committee may determine that a Stock
Appreciation Right may be exercised only during the period beginning on the
third business day and ending on the twelfth business day following the
publication of the Company's quarterly and annual summarized financial data.
Such publication shall be deemed to occur when the data first appears on a wire
service, in a financial news service or in a newspaper of general circulation.
The Company may provide written notification to the Holder of a Stock
Appreciation Right specifying the date on which such financial data was
published.

          (h) No Stock Appreciation Right or related Option granted to an
officer of the Company may be exercised prior to six months after the date of
grant except in the event death or disability of the officer occurs prior to
the expiration of the six-month period.

                                       7
<PAGE>   8

          (i) Each Stock Appreciation Right shall be evidenced by a written
instrument and may, but need not, include any other terms and conditions not
inconsistent with the Plan as the Committee may approve.


9.        STOCK APPRECIATION RIGHTS UNRELATED TO OPTIONS

          The Committee may at any time and from time to time approve the grant
by the Company to Eligible Persons of Stock Appreciation Rights that are
unrelated to Options, and determine the specific Eligible Persons to whom such
Stock Appreciation Rights may be granted, the terms and provisions of the Stock
Appreciation Rights agreements, and the time or times at which such Stock
Appreciation Rights may be exercised, subject to the following terms and
conditions.

          (a) The date of grant shall be the date the Committee takes the
necessary action to approve the grant; provided, however, that if the minutes
or appropriate resolutions of the Committee provide that a Stock Appreciation
Right is to be granted as of a date in the future, the date of grant shall be
such future date. In any event, the intended Eligible Person must be an
Eligible Person on the date of grant.

          (b) A Stock Appreciation Right shall entitle the Holder, upon
exercise of the Stock Appreciation Right, to receive payment of an amount
determined by dividing:

                  (i) the number of shares of Common Stock as to which the
          Stock Appreciation Right is exercised multiplied by the amount of the
          appreciation in such shares (for this purposes the "appreciation"
          shall be the amount by which the Fair Market Value of the shares of
          Common Stock subject to the Stock Appreciation Right on the exercise
          date exceeds an amount which shall be determined by the Committee at
          the time of grant; by

                  (ii) the Fair Market Value of a share of Common Stock on the
          exercise date.

          (c) In lieu of issuing shares of Common Stock upon the exercise of a
Stock Appreciation Right, the Committee may elect to pay the holder of the
Stock Appreciation Right cash equal to the Fair Market Value on the exercise
date of any or all of the shares which would otherwise be issuable. No
fractional shares of Common Stock shall be issued upon the exercise of a Stock
Appreciation Right; instead, the holder of the Stock Appreciation Right shall
be entitled to receive a cash adjustment equal to the same fraction of the Fair
Market Value of the share of Common Stock on the exercise date or to purchase
the portion necessary to make a whole share at its Fair Market Value on the
date of exercise.

          (d) The Committee may impose such conditions on the exercise of a
Stock Appreciation Right granted hereunder as may be required to satisfy the
requirements of Rule 16b-3 under the Securities Exchange Act of 1934 (or any
other comparable provisions in effect at the time or times in question).
Without limiting the generality of the foregoing, the Committee may determine
that a Stock Appreciation Right may be exercised only during the period
beginning on the third business day and ending on the twelfth business day
following the date of publication of the Company's quarterly and annual
summarized financial data. Such publication


                                       8
<PAGE>   9

shall be deemed to occur when the data first appears on the wire service, in a
financial news service or in a newspaper of general circulation. The Company
may provide written notification to the Holder of a Stock Appreciation Right
specifying the date on which such financial data was published.

          (e) No Stock Appreciation Right granted to an officer of the Company
may be exercised prior to six months after the date of grant except in the
event death or disability of the officer occurs prior to the expiration of said
six-month period.

          (f) A Stock Appreciation Right shall not be assignable or
transferable by the Holder otherwise than by will or the laws of descent and
distribution, and may be exercised during the lifetime of the Holder only by
the Holder.

          (g) Each Stock Appreciation Right hereunder shall be evidenced by a
written instrument and may, but need not, include any other terms and condition
not inconsistent with the Plan as the Committee may approve.


10.       STOCK AWARD AND RESTRICTED STOCK

          The Committee may at any time and from time to time approve the grant
by the Company of a Stock Award or Restricted Stock to Eligible Persons, and
determine the specific Eligible Persons to whom such Stock awards and
restricted stock may be granted, the number of shares to be granted and the
terms and provisions of such award of Common Stock. A stock award consists of
the transfer by the Company to a participant of shares of Common Stock, without
other payment therefor, as additional compensation for his/her services to the
Company. A share of restricted stock consists of shares of Common Stock which
are sold or transferred by the Company to a participant at a price which may be
below their Fair Market Value or for no payment, but subject to restrictions on
their sale or other transfer by the participant. The transfer of Common Stock
pursuant to stock awards and the transfer and sale of restricted stock shall be
subject to the following terms and conditions:

          (a) The number of shares to be transferred or sold by the Company to
a participant pursuant to a stock award or as restricted stock shall be
determined by the Committee. The criteria of the grant of performance based
restricted stock will be established by the Committee at the date the
restricted stock is granted. If the Committee elects to grant time-based
restricted stock, such restricted stock shall vest over at least a three (3)
year period.

          (b) The Committee shall determine the prices, if any, at which shares
of restricted stock shall be sold to a participant, which may vary from time to
time and among participants and which may be below the Fair Market Value of
such shares of Common Stock at the date of sale.

          (c) All shares of restricted stock transferred or sold hereunder
shall be subject to such restrictions as the Committee may determine,
including, without limitation any or all of the following:


                                       9
<PAGE>   10

                   (i) A prohibition against the sale, transfer, pledge or
          other encumbrance of the shares of restricted stock, such prohibition
          to lapse at such time or times as the Committee shall determine
          (whether in annual or more frequent installments, at the time of the
          death, disability or retirement of the holder of such shares, or
          otherwise);

                   (ii) A requirement that the holder of shares of restricted
          stock forfeit, or (in the case of shares sold to a participant) resell
          back to the Company at his cost, all or a part of such shares in the
          event of termination of his employment during any period in which such
          shares are subject to restrictions;

                   (iii) A prohibition against employment of the holder of such
          restricted stock by any competitor of the Company or a subsidiary of
          the Company, or against such holder's dissemination of any secret or
          confidential information belonging to the Company or a subsidiary of
          the Company.

          (d) In order to enforce the restrictions imposed by the Committee
pursuant to (c) above, the participant receiving restricted stock shall enter
into an agreement with the Company setting forth the conditions of the grant.
Shares of restricted stock shall be registered in the name of the participant
and deposited, together with a stock power endorsed in blank, with the Company.

          (e) At the end of any time period during which the shares of
restricted stock are subject to forfeiture and restrictions on transfer, such
shares will be delivered free of all restrictions to the participant or to the
participant's legal representative, beneficiary or heir.

          (f) Subject to the terms and conditions of the Plan, each participant
receiving restricted stock shall have all the rights of a stockholder with
respect to shares of stock during any period in which such shares are subject
to forfeiture and restrictions on transfer, including without limitation, the
right to vote such shares. Dividends paid in cash or property other than Common
Stock with respect to shares of restricted stock shall be paid to the
participant currently or, at the election of the participant, be reinvested by
the participant under the Company's Automatic Dividend Reinvestment Service.
Shares purchased with reinvested dividends shall not be restricted.


11.       CASH AWARDS

          The Committee may at any time and from time to time approve the
payment by the Company of a cash award to Eligible Persons. A cash award
consists of a monetary payment made by the Company to a participant as
additional compensation for his/her services to the Company. Payment of a cash
award will normally depend on achievement of performance objectives by the
Company or by individuals. The amount of any monetary payment constituting a
cash award shall be determined by the Committee in its sole discretion. Cash
awards may be subject to other terms and conditions, which may vary from time
to time and among participants, as the Committee determines to be appropriate.


                                      10
<PAGE>   11

12.       ADJUSTMENT PROVISIONS

          (a) Subject to Section 12(b), if the outstanding shares of Common
Stock of the Company are increased, decreased or exchanged for a different
number or kind of shares or other securities, or if additional shares or new or
different shares or other securities are distributed with respect to such
shares of Common Stock or other securities, through merger, consolidation, sale
of all or substantially all of the property of the Company, reorganization,
recapitalization, reclassification, stock dividend, stock split, reverse stock
split or other distribution with respect to such shares of Common Stock or
other securities, an appropriate and proportionate adjustment may be made in
(i) the maximum number and kind of shares provided in Section 3 of the Plan,
(H) the number and kind of shares or other securities subject to the then
outstanding Options and Stock Appreciation Rights, and (iii) the price for each
share or other unit of any other securities subject to then outstanding Options
and the value of any then outstanding Stock Appreciation Rights without change
in the aggregate purchase price or value as to which such Options or Stock
Appreciation Rights remain exercisable.

          (b) Notwithstanding any provision in this Plan or in any Incentive to
the contrary, (i) the restrictions on all shares of restricted stock awarded
shall lapse immediately; (ii) all outstanding Options and Stock Appreciation
Rights will become exercisable immediately; and (iii) all performance
objectives shall be deemed to be met and payment made immediately if any of the
following events occur unless otherwise determined by the Board of Directors
and a majority of the Continuing Directors (as defined below):

                   (i) in the event of a pending or threatened takeover bid or
          tender offer for 25 % or more of the outstanding securities of the
          Company, whether or not deemed a tender offer under applicable state
          or federal laws, or in the event that any person makes any filing
          under Section 13(d) or 14(d) of the Securities Exchange Act of 1934
          with respect to the Company;

                   (ii) a majority of the members of the Board of Directors of
          the Company is replaced within any period of less than two years by
          directors not nominated and approved by the Board of Directors; or

                   (iii) the stockholders of the Company approve an agreement
          to merge or consolidate with or into another corporation or an
          agreement to sell or otherwise dispose of all or substantially all of
          the Company's assets (including a plan of liquidation).

          For purposes of this Section, "Continuing Directors" are directors
(a) who were in office prior to the time any of provisions (i), (ii) or (iii)
occurred or any person publicly announced an intention to acquire 25 % or more
of any equity security of the Company, (b) directors in office for a period of
more than two years, and (c) directors nominated and approved by the Continuing
Directors.

          (c) Adjustments under Sections 12(a) and 12(b) shall be made by the
Committee, whose determination as to what adjustments shall be made and the
extent thereof shall be final, 


                                      11
<PAGE>   12

binding and conclusive. No fractional interest shall be issued under the Plan
on account of any such adjustment. 

13.       GENERAL PROVISIONS

          (a) With respect to any shares of Common Stock issued or transferred
under any provisions of the Plan, such shares may be issued or transferred
subject to such conditions, in addition to those specifically provided in the
Plan, as the Committee may direct.

          (b) Nothing in the Plan or in any instrument executed pursuant
thereto shall confer upon any Holder any right to continue in the employ of the
Company or any of its subsidiaries or affect the right of the Company to
terminate the employment of any Holder at any time with or without cause.

          (c) No shares of Common Stock shall be issued or transferred pursuant
to an Incentive Award unless and until all then applicable requirements imposed
by federal and state securities and other laws, rules and regulations and by
any regulatory agencies having jurisdiction, and by any stock exchanges upon
which the Common Stock may be listed, shall have been fully met. As a condition
precedent to the issuance of shares pursuant to the grant or exercise of an
Incentive Award, the Company may require the Holder to take any reasonable
action to meet such requirements.

          (d) No Holder (individually or as a member of a group) and no
beneficiary or other person CLAIMING under or through such Holder shall have
any right, title or interest in or to any shares of Common Stock allocated or
reserved under the Plan or subject to any Incentive Award except as to such
shares of Common Stock, if any, that have been issued or transferred to such
Holder.

          (e) The Company may make such provisions as it deems appropriate for
the withholding of any taxes that the Company or any subsidiary corporation
determines it is required to withhold in connection with any Incentive Award.

          (f) No Incentive Award and no right under the Plan, contingent or
otherwise, shall be assignable or subject to any encumbrance, pledge or charge
of any nature except that, under such rules and regulations as the Company may
establish pursuant to the terms of the Plan, a beneficiary may be designated
with respect to an Incentive Award in the event of the death of the Holder of
such Incentive Award and except also, that if such beneficiary is the executor
or administrator of the estate of the Holder of such Incentive Award, then any
rights with respect to such Incentive Award may be transferred to the person or
persons or entity (including a trust) entitled thereto under the will of the
holder of such Incentive Award, or in the case of intestacy, under the laws
relating to intestacy.

          (g) Nothing in the Plan is intended to be a substitute for, or to
preclude or limit the establishment of, any other plan, practice or arrangement
for the payment of compensation or benefits to employees generally, or to any
class or group of employees that the Company now has or may hereafter lawfully
put into effect, including, without limitation, any retirement, pension,
insurance, stock purchase, incentive compensation or bonus plan.



                                      12
<PAGE>   13

          (h) The Company may make a loan or guarantee a loan to an Optionee
(including an Optionee who is an officer of the Company or any subsidiary
corporation of the Company) in connection with the exercise of an Option in an
amount not to exceed the aggregate exercise price of the Option being exercised
and any federal and state taxes payable in connection with such exercise for
the purpose of assisting such Optionee to exercise such Option. The Company may
also make a loan or guarantee a loan to an optionee (including an optionee who
is an officer of the Company or any subsidiary corporation of the Company) in
connection with the exercise of an option granted under the Smith
International, Inc. 1971 and 1982 Stock Option Plans in an amount not to exceed
the aggregate exercise price of the option being exercised and any federal and
state taxes payable in connection with such exercise for the purpose of
assisting such optionee to exercise such option. Any such loan or guarantee may
be secured by shares of Common Stock or other collateral deemed adequate by the
Committee and shall comply in all respects with all applicable laws and
regulations. The Board of Directors and the Committee may adopt policies
regarding eligibility for such loans and guarantees, the maximum amounts
thereof and any terms and conditions not specified in the Plan upon which such
loans will be made and guarantees extended.

          (i) The Company shall have the right to withhold from any payments
made under the Plan or to collect as a condition of payment, any taxes required
by law to be withheld. At any time when a participant is required to pay to the
Company an amount required to be withheld under applicable income tax laws in
connection with a distribution of Common Stock or upon exercise of an option or
Stock Appreciation Right, the participant may satisfy this obligation in whole
or in part by electing (the "Election") to have the Company withhold from the
distribution shares of Common Stock having a value equal to the amount required
to be withheld. The value of the shares to be withheld shall be based on the
Fair Market Value of the Common Stock on the date that the amount of tax to be
withheld shall be determined ("Tax Date"). Each Election must be made prior to
the Tax Date. The Committee may disapprove of any Election, may suspend or
terminate the right to make Elections, or may provide with respect to any
Incentive that the right to make Elections shall not apply to such Incentive.
An Election is irrevocable.

          (j) If a participant is an officer of the Company within the meaning
of Section 16 of the 1934 Act, then an Election is subject to the following
additional restrictions:

                  (i) No Election shall be effective for a Tax Date which
          occurs within six months of the grant of the award, except that this
          limitation shall not apply in the event death or disability of the
          participant occurs prior to the expiration of the six-month period.

                  (ii) The Election must be made either six months prior to the
          Tax Date or must be made during a period beginning on the third
          business day following the date of release for publication of the
          Company's quarterly or annual summary statements of sales and earnings
          and ending on the twelfth business day following such date.

          (k) Anything in this Plan to the contrary notwithstanding, the
Company, may if it shall determine it necessary or desirable for any reason, at
the time of award of any Incentive or the issuance of any shares of Common
Stock pursuant to any Incentive, require the recipient of the Incentive, as a
condition to the receipt thereof or to the receipt of shares of Common Stock


                                      13

<PAGE>   14

issued pursuant thereto, to deliver to the Company a written representation of
present intention to acquire the Incentive or the shares of Common Stock issued
pursuant thereto for his own account for investment and not for distribution.


14.       AMENDMENT AND TERMINATION

          (a) The Board of Directors shall have the power, in its discretion,
to amend, suspend or terminate the Plan at any time. No such amendment shall,
without approval of the shareholders of the Company, except as provided in
Section 12 of the Plan:

                  (i) Change the class of persons eligible to receive Incentive
          Awards under the Plan;

                  (ii) Materially increase the benefits accruing to Eligible
          Persons under the Plan;

                  (iii) Increase the number of shares of Common Stock subject
          to the Plan; or

                  (iv) Transfer the administration of the Plan to any person
          who is not a Disinterested Person.

          (b) The Committee may, with the consent of a Holder, make such
modifications in the terms and conditions of an Option or a Stock Appreciation
Right as it deems advisable.

          (c) No amendment, suspension or termination of the Plan shall,
without the consent of the Holder, alter, terminate, impair or adversely affect
any right or obligation under any Incentive Award previously granted under the
Plan.

          (d) No amendment to the Plan shall be made that would permit the
granting of Incentive Awards to members of the Committee.

          (e) A Stock Appreciation Right or an Option held by a person who was
an Employee at the time such Right or Option was granted shall terminate if and
when the Holder ceases to be an Employee, except as follows:

                  (i) If the employment of an Employee is terminated for cause,
          for which the Company shall be the sole judge, or if the Employee
          voluntarily resigns, all of the Stock Appreciation Rights and Options
          of the Employee shall expire immediately. Retirement with the consent
          of the Company shall not be deemed a voluntary resignation for
          purposes of this subparagraph (i) .

                  (ii) If the employment of an Employee is terminated by the
          Company other than for cause, for which the Company shall be the sole
          judge, then the Stock Appreciation Rights and Options expire one year
          thereafter unless by their terms they expire sooner. During said
          period, the Stock Appreciation Rights and Options may be exercised in


                                      14
<PAGE>   15
          accordance with their terms, but only to the extent exercisable on the
          date of termination of employment.

                  (iii) If the employee retires at normal retirement age or
         retires with the consent of the Company at an earlier date the Stock
         Appreciation Rights and Options of the Employee shall expire three
         years thereafter unless by their terms they expire sooner. During said
         period, the Stock Appreciation Rights and Options may be exercised in
         accordance with their terms, but only to the extent exercisable on the
         date of retirement.

                  (iv) If an Employee dies or becomes permanently and totally
          disabled while employed by the Company or a parent or subsidiary
          corporation, the Stock Appreciation Rights and Options of the Employee
          shall expire three years after the date of death or permanent and
          total disability unless by their terms they expire sooner. If the
          Employee dies or becomes permanently and totally disabled within the
          one-year period referred to in subparagraph (ii) above, the Stock
          Appreciation Rights and Options shall expire one year after the date
          of death or permanent and total disability, unless by their terms they
          expire sooner. If the Employee dies or becomes permanently and totally
          disabled within the three-year period referred to in subparagraph
          (iii) above, the Stock Appreciation Rights and Options shall expire
          upon the later of three years after retirement or one year after the
          date of death or permanent and total disability, unless by their terms
          they expire sooner. During said periods the Stock Appreciation Rights
          and Options may be exercised by the Employee, or in the event of the
          death of the Employee, the Stock Appreciation Rights and Options may
          be exercised by the Employee's designated beneficiary, personal
          representatives or the persons to whom his rights under the Stock
          Appreciation Rights and Options have passed by will or the laws of
          descent and distribution, in accordance with their terms, but only to
          the extent exercisable on the date of retirement or termination of
          employment.

                  (v) Notwithstanding the above, a Stock Appreciation Right or
          Option may not be exercised after the expiration of ten years from the
          date the Stock Appreciation Right or Option is granted.

          (f) The Committee may in a particular case provide for earlier
termination or expiration periods for any Stock Appreciation Right or Option
but may not extend any of the periods provided for in this section.

          (g) The Committee may in its sole discretion determine, with respect
to a Stock Appreciation Right or Option, that any Holder who is on leave of
absence for any reason will be considered as still in the employ of the
Company, provided that the Stock Appreciation Right or Option shall be
exercisable during a leave of absence only as to the amount of number of shares
with respect to which it was exercisable at the commencement of such leave of
absence.


15.       EFFECTIVE DATE OF PLAN AND DURATION OF PLAN

          This Plan shall become effective upon adoption by the Board of
Directors of the Company (February 6, 1989) and Incentive Awards may be made
under the Plan at any time thereafter, 


                                      15
<PAGE>   16

provided, however, that no shares of Common Stock may be issued under the Plan,
no Stock Appreciation Rights granted under the Plan may be exercised and no
Cash Award may be paid prior to completion of the following: (a) the approval
of the Plan by shareholders owning a majority of the outstanding shares of
Common Stock of the Company, with the votes of any officers who are
shareholders not being counted for the purpose of determining a majority, (b)
the registration of the Plan and securities to be issued in connection
therewith under the Securities Act of 1933, and (c) the listing of the shares
of Common Stock reserved for issuance under the Plan on the New York Stock
Exchange, Inc. and the Pacific Stock Exchange, Inc. Unless previously
terminated by the Board of Directors, the Plan shall terminate at the close of
business on April 22, 2008, and no Incentive Award may be granted under the
Plan thereafter, but such termination shall not affect any Incentive Award
issued or granted on or prior to said date.


                                      16

<PAGE>   1

                                                                    EXHIBIT 5.1


April 19, 1999


Board of Directors
Smith International, Inc.
16740 Hardy Street
Houston, Texas 77032

Gentlemen:

     As Senior Vice President - Administration, General Counsel and Secretary
of Smith International, Inc., a Delaware corporation (the "Company"), I have
acted as counsel in connection with the Company's Registration Statement on
Form S-8, dated April 19, 1999 (the "Registration Statement"), relating to the
registration under the Securities Act of 1933, as amended, of the issuance of
up to 2,400,000 shares of Common Stock, par value $1.00 per share ("Common
Stock"), of the Company (the "Shares") issuable pursuant to the Smith
International, Inc. 1989 Long-Term Incentive Compensation Plan, as amended (the
"Plan").

     As the basis for the opinion hereinafter expressed, I have examined, or
caused attorneys under my supervision to examine, such corporate records and
documents, certificates of corporate and public officials and such other
instruments as I have deemed necessary for the purposes of the opinion
contained herein. As to all matters of fact material to such opinion, I have
relied upon the representations of officers of the Company. I have assumed the
genuineness of all signatures, the authenticity of all documents submitted to
me as originals, and the conformity with the original documents of all
documents submitted to me as copies.

     Based upon the foregoing and having due regard for such legal
consideration as I deem relevant, I am of the opinion that the Shares to be
offered under the Plan have been duly authorized, and that the Shares, when
properly issued under the Plan, will be validly issued, fully paid and
nonassessable.

     I hereby consent to the inclusion of this opinion as an exhibit to the
Registration Statement.

                                                Very truly yours,


                                               /s/  Neal S. Sutton


<PAGE>   1

                                                                   Exhibit 23.1

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


As independent public accountants, we hereby consent to the incorporation by
reference in this registration statement on Form S-8 of Smith International,
Inc. of our report dated January 29, 1999 included in Smith International's Form
10-K for the year ended December 31, 1998 and all references to our Firm
included in this registration statement.


                                            /s/ ARTHUR ANDERSEN LLP


Houston, Texas
April 19, 1999



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