================================================================================




                                  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): April 16, 2002



                        Commission File Number 001-14273


                             CORE LABORATORIES N.V.
             (Exact name of Registrant as specified in its charter)


         The Netherlands                          Not Applicable
  (State or other jurisdiction            (I.R.S. Employer Identification No.)
of incorporation or organization)


          Herengracht 424
          1017 BZ Amsterdam
          The Netherlands                         Not Applicable
 (Address of principal executive offices)           (Zip Code)


      Registrant's telephone number, including area code: (31-20) 420-3191



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<PAGE>


Item 4.   Change in the Registrant's Certifying Accountant

            On April 10, 2002, Core Laboratories N.V. ("Core Laboratories"
or the "Company") decided to no longer engage Arthur Andersen LLP
("Andersen") as the Company's independent public accountants and appointed
PricewaterhouseCoopers LLP as its new independent auditors for 2002. This
decision followed the Audit Committee's recommendation to seek proposals from
independent public accountants with respect to the 2002 audit, and was
approved by the Company's Board of Supervisory Directors.  The decision to
change auditors is not a reflection of Andersen's commitment or quality of
service to the Company.  During its seven year relationship with the Company,
the Andersen team exhibited the highest degree of professionalism and quality
service.

            Andersen's reports on Core Laboratories consolidated financial
statements for each of the years ended December 31, 2001 and 2000 did not
contain an adverse opinion or disclaimer of opinion, nor were they qualified
or modified as to uncertainty, audit scope or accounting principles.

            During the years ended December 31, 2001 and 2000 and through the
date hereof, there were no disagreements with Andersen on any matter of
accounting principle or practice, financial statement disclosure, or
auditing scope or procedure which, if not resolved to Andersen's
satisfaction, would have caused them to make reference to the subject matter
in connection  with their report on Core Laboratories consolidated financial
statements for such  years.  There were no reportable events described
under Item 304(a)(1)(v) of Regulation S-K within the two most recent fiscal
years of the Company ended December 31, 2001.  The Company provided
Andersen with a copy of the foregoing  disclosures.  Attached as Exhibit 16
is a copy of Andersen's letter, dated April 16, 2002, stating its agreements
with said statements.

            During the two most recent fiscal years of the Company ended
December 31, 2001 and through the date hereof, the Company did not consult with
PricewaterhouseCoopers LLP regarding any of the matters or events set forth
in Item 304(a)(2)(i) and (ii) of Regulation S-K.

Item 7.     Financial Statements and Exhibits

         (c)      Exhibits.

         16      Letter of Arthur Andersen LLP regarding change in certifying
                 accountant.







                                       ii


<PAGE>



                                    SIGNATURE



       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 thereunto duly authorized.



                             CORE LABORATORIES N.V.




                             /s/ Richard L. Bergmark
                             Executive Vice President,
                             Chief Financial Officer, Treasurer
                             And Supervisory Director



April 16, 2002

                                      iii
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================================================================================

                                  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): April 16, 2002

                        Commission File Number 001-14273

                             CORE LABORATORIES N.V.
             (Exact name of Registrant as specified in its charter)

         The Netherlands                          Not Applicable
  (State or other jurisdiction            (I.R.S. Employer Identification No.)
of incorporation or organization)

          Herengracht 424
          1017 BZ Amsterdam
          The Netherlands                         Not Applicable
 (Address of principal executive offices)           (Zip Code)

      Registrant's telephone number, including area code: (31-20) 420-3191

================================================================================
Item 4.   Change in the Registrant's Certifying Accountant

            On April 10, 2002, Core Laboratories N.V. ("Core Laboratories"
or the "Company") decided to no longer engage Arthur Andersen LLP
("Andersen") as the Company's independent public accountants and appointed
PricewaterhouseCoopers LLP as its new independent auditors for 2002. This
decision followed the Audit Committee's recommendation to seek proposals from
independent public accountants with respect to the 2002 audit, and was
approved by the Company's Board of Supervisory Directors.  The decision to
change auditors is not a reflection of Andersen's commitment or quality of
service to the Company.  During its seven year relationship with the Company,
the Andersen team exhibited the highest degree of professionalism and quality
service.

            Andersen's reports on Core Laboratories consolidated financial
statements for each of the years ended December 31, 2001 and 2000 did not
contain an adverse opinion or disclaimer of opinion, nor were they qualified
or modified as to uncertainty, audit scope or accounting principles.

            During the years ended December 31, 2001 and 2000 and through the
date hereof, there were no disagreements with Andersen on any matter of
accounting principle or practice, financial statement disclosure, or
auditing scope or procedure which, if not resolved to Andersen's
satisfaction, would have caused them to make reference to the subject matter
in connection  with their report on Core Laboratories consolidated financial
statements for such  years.  There were no reportable events described
under Item 304(a)(1)(v) of Regulation S-K within the two most recent fiscal
years of the Company ended December 31, 2001.  The Company provided
Andersen with a copy of the foregoing  disclosures.  Attached as Exhibit 16
is a copy of Andersen's letter, dated April 16, 2002, stating its agreements
with said statements.

            During the two most recent fiscal years of the Company ended
December 31, 2001 and through the date hereof, the Company did not consult with
PricewaterhouseCoopers LLP regarding any of the matters or events set forth
in Item 304(a)(2)(i) and (ii) of Regulation S-K.

Item 7.     Financial Statements and Exhibits

         (c)      Exhibits.

         16      Letter of Arthur Andersen LLP regarding change in certifying
                 accountant.

                                       ii
SIGNATURE

       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 thereunto duly authorized.

                             CORE LABORATORIES N.V.

                             /s/ Richard L. Bergmark
                             Executive Vice President,
                             Chief Financial Officer, Treasurer
                             And Supervisory Director

April 16, 2002

                                      iii