DAWSON GEOPHYSICAL CO
SC 13D/A, 1999-04-27
OIL & GAS FIELD EXPLORATION SERVICES
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<PAGE>   1
                             ------------------- 

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

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

                                  SCHEDULE 13D
                   Under the Securities Exchange Act of 1934

                               (Amendment No. 3)

                           DAWSON GEOPHYSICAL COMPANY
                                (Name of Issuer)

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

                        COMMON STOCK, $.331/3 PAR VALUE
                         (Title of Class of Securities)

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

                                  239359 10 2
                                 (CUSIP Number)

                           MR. RICHARD E. BLOHM, JR.
                             1415 LOUISIANA STREET
                              HOUSTON, TEXAS 77002
                                 (713) 739-6500
                      (Name, Address and Telephone Number
                    of Person Authorized to Receive Notices
                              and Communications)

                                with a copy to:
                              MR. JOHN R. BRANTLEY
                         BRACEWELL & PATTERSON, L.L.P.
                        711 LOUISIANA STREET, SUITE 2900
                              HOUSTON, TEXAS 77002
                                  713-223-2900

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

                                 APRIL 23, 1999
            (Date of Event which Requires Filing of this Statement)

            If the filing person has previously filed a statement on
          Schedule 13G to report this acquisition that is the subject
  of this Schedule 13D, and is filing this Schedule because of Rule 13d-1(e),
          Rule 13d-1(f) or Rule 13d-1(g), check the following box: [ ]

            The information required on the remainder of this cover
           page shall not be deemed to be "filed" for the purpose of
          Section 18 of the Securities Exchange Act of 1934 ("Act") or
      otherwise subject to the liabilities of that section of the Act but
              shall be subject to all other provisions of the Act.




                               Page 1 of 7 Pages



<PAGE>   2
                                                              Page 2 of 7 Pages

CUSIP NO.: 239359 10 2

                        AMENDMENT NO. 3 TO SCHEDULE 13D

===============================================================================
   1     NAME OF REPORTING PERSON; S.S. OR IRS IDENTIFICATION NUMBER

         Pebbleton Corporation N.V.
- -------------------------------------------------------------------------------
   2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
         (a) [   ]
         (b) [   ]
- -------------------------------------------------------------------------------
   3     SEC USE ONLY

- -------------------------------------------------------------------------------
   4     SOURCE OF FUNDS
         WC
- -------------------------------------------------------------------------------
   5     CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
         PURSUANT TO ITEM 2(D) OR 2(E)

         [  ]
- -------------------------------------------------------------------------------
   6     CITIZENSHIP OR PLACE OF ORGANIZATION

         Netherlands Antilles
- -------------------------------------------------------------------------------
   7     Sole Voting Power

         0
- -------------------------------------------------------------------------------
   8     SHARED VOTING POWER

         644,900
- -------------------------------------------------------------------------------
   9     SOLE DISPOSITIVE POWER

         0
- -------------------------------------------------------------------------------
  10     SHARED DISPOSITIVE POWER

         644,900
- -------------------------------------------------------------------------------
  11     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         644,900
- -------------------------------------------------------------------------------
  12     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

         [  ]
- -------------------------------------------------------------------------------
  13     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

         11.93%
- -------------------------------------------------------------------------------
  14     TYPE OF REPORTING PERSON

             CO
===============================================================================




<PAGE>   3
                                                             Page 3 of 7 Pages

CUSIP NO.:239359 10 2

                        AMENDMENT NO. 3 TO SCHEDULE 13D

===============================================================================
   1     NAME OF REPORTING PERSON; S.S. OR IRS IDENTIFICATION NUMBER

         Issam M. Fares
- -------------------------------------------------------------------------------
   2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
         (a) [   ]
         (b) [   ]
- -------------------------------------------------------------------------------
   3     SEC USE ONLY

- -------------------------------------------------------------------------------
   4     SOURCE OF FUNDS
         AF
- -------------------------------------------------------------------------------
   5     CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
         PURSUANT TO ITEM 2(D) OR 2(E)

         [  ]
- -------------------------------------------------------------------------------
   6     CITIZENSHIP OR PLACE OF ORGANIZATION

         Lebanese
- -------------------------------------------------------------------------------
   7     Sole Voting Power

         0
- -------------------------------------------------------------------------------
   8     SHARED VOTING POWER

         644,900
- -------------------------------------------------------------------------------
   9     SOLE DISPOSITIVE POWER

         0
- -------------------------------------------------------------------------------
  10     SHARED DISPOSITIVE POWER

         644,900
- -------------------------------------------------------------------------------
  11     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         644,900
- -------------------------------------------------------------------------------
  12     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

         [   ]
- -------------------------------------------------------------------------------
  13     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

         11.93%
- -------------------------------------------------------------------------------
  14     TYPE OF REPORTING PERSON

         IN
===============================================================================




<PAGE>   4
                                                              Page 4 of 7 Pages
                                  SCHEDULE 13D
                                AMENDMENT NO. 3

           Unless otherwise defined or indicated in this Amendment No. 3,
capitalized terms which are used herein and are defined in the Schedule 13D
filed October 16, 1998, as heretofore amended ("Original 13D"), shall have the
meanings assigned to them in the Original 13D. All information herein with
respect to Dawson Geophysical Company, a Texas corporation, is to the best
knowledge and belief of the Reporting Persons, as defined herein.

ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER.

           (a) As set forth herein, Pebbleton owns 644,900 shares of Common
Stock of the Issuer, which represents approximately 11.93% of the outstanding
Common Stock (based on the number of shares of Common Stock outstanding as of
December 31, 1998, as represented by the Issuer in its Form 10-Q for the
quarter ended December 31, 1998, as filed with the Securities and Exchange
Commission on February 8, 1999). See Item 4.

           (b) Mr. Fares may be deemed to beneficially own and thereby share
voting and dispositive power over the shares of Common Stock described herein
which are held by Pebbleton. See Item 2.

           (c) Set forth in Exhibit A to this Amendment No. 2 is a list of all
transactions effected in the Issuer's Common Stock within the past sixty (60)
days, including (i) the identity of the person effecting transactions in the
Issuer's Common Stock; (ii) the date of the transaction; (iii) the amount of
securities involved; (iv) the price per share of Common Stock; and (v) where
and how the transaction was effected. Other than the transactions described
herein, none of the Reporting Persons nor to the knowledge of the Reporting
Persons, any of their officers or directors, has effected any transactions in
the Common Stock during the preceding sixty days.

ITEM 7  MATERIAL TO BE FILED AS EXHIBITS.

           Exhibit A           Transactions in the Common Stock

<PAGE>   5

                                                              Page 5 of 7 Pages
                                   SIGNATURES


           After reasonable inquiry and to the best of the undersigned's
knowledge and belief, each of the undersigned hereby certifies that the
information set forth in this statement is true, complete and correct.


Dated: April 26, 1999.                   PEBBLETON CORPORATION N.V.
                                         By:  Issam M. Fares, Managing Director


                                         By: /s/ Richard E.  Blohm, Jr. 
                                            ------------------------------
                                                 Richard E. Blohm, Jr.
                                                 Attorney in Fact


Dated: April 26, 1999.                   Issam M. Fares



                                         By: /s/ Richard E.  Blohm, Jr.
                                            ------------------------------
                                                 Richard E. Blohm, Jr.
                                                 Attorney in Fact








<PAGE>   6


                                                              Page 6 of 7 Pages

                               INDEX TO EXHIBITS


           Exhibit A           Transactions in the Common Stock






<PAGE>   1

                                                             Page 7 of 7 Pages
                                   EXHIBIT A
                        TRANSACTIONS IN THE COMMON STOCK

           With respect to the transactions set forth below, all purchases were
made by Pebbleton Corporation N.V. and were effected on The Nasdaq Stock
Market, Inc., the exchange on which the shares of Common Stock of Dawson
Geophysical Company are traded during the 60 days prior to the filing of this
Amendment No. 3.



DATE OF PURCHASE             NUMBER OF SHARES                PRICE PER SHARE
                                PURCHASED                          ($)
  03/12/99                        1,000                          7.5000

  03/15/99                          200                          7.8750
                                 14,800                          8.0000
                                 ------
                                 15,000

  03/16/99                        3,700                          8.0625
                                  2,000                          8.1875
                                  6,400                          8.1250
                                 12,000                          8.2500
                                 ------
                                 24,100

  03/17/99                       19,900                          8.4375
                                  5,200                          8.5000
                                 ------
                                 25,100                        

  03/23/99                        1,000                          8.5000

  03/24/99                        1,300                          8.5000

  03/25/99                        2,800                          8.5000

  03/26/99                          700                          8.5000

  04/01/99                       10,000                          8.0625
                                 10,000                          8.2500
                                 ------
                                 20,000

  04/20/99                       10,000                          9.0000

  04/22/99                       15,000                          9.5700
                                    500                          9.6250
                                  2,500                          9.7500
                                 ------
                                 18,000

  04/23/99                        1,000                          9.4375
                                  8,000                          9.7500
                                 ------
                                  9,000





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