Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Miller Charles Brigham
  2. Issuer Name and Ticker or Trading Symbol
CORE LABORATORIES N V [CLB]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
CHIEF ACCOUNTING OFFICER
(Last)
(First)
(Middle)
11426 STONEY FALLS DRIVE
3. Date of Earliest Transaction (Month/Day/Year)
04/03/2001
(Street)

HOUSTON, TX 77095
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
COMMON SHARES 01/01/2004   A   2,800 A $ 0 8,000 D  
COMMON SHARES 11/11/2004   S   5,000 D $ 24.21 3,000 D  
COMMON SHARES 11/24/2004   M   10,000 A $ 10.26 13,000 D  
COMMON SHARES 11/24/2004   M   1,676 A $ 19.375 14,676 D  
COMMON SHARES 11/24/2004   S   11,676 D $ 24.21 3,000 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (Right to Buy) $ 16.1 04/03/2001   A   10,000     (1) 04/03/2011 COMMON STOCK 10,000 $ 0 10,000 D  
Employee Stock Option (Right to Buy) $ 10.26 09/26/2001   A   6,872     (2) 09/26/2011 COMMON STOCK 6,872 $ 0 0 D  
Employee Stock Option (Right to Buy) $ 10.26 09/26/2001   A   3,128     (2) 09/26/2011 COMMON STOCK 3,128 $ 0 0 D  
Employee Stock Option (Right to Buy) $ 10.26 09/26/2001   A   10,000     (3) 09/26/2011 COMMON STOCK 10,000 $ 0 20,000 D  
Employee Stock Option (Right to Buy) $ 8.84 03/13/2003   A   10,000     (4) 03/13/2013 COMMON STOCK 10,000 $ 0 10,000 D  
Employee Stock Option (Right to Buy) $ 19.375 11/24/2004   M     1,676 02/23/2004 02/23/2010 COMMON STOCK 1,676 $ 0 3,324 D  
Employee Stock Option (Right to Buy) $ 10.26 11/24/2004   M     10,000 09/26/2003 09/26/2011 COMMON STOCK 10,000 $ 0 10,000 D  
Performance Shares (5) (6) 01/01/2002   A   5,000   12/31/2004 12/31/2004 COMMON STOCK 5,000 $ 0 5,000 D  
Performance Shares (5) (6) 01/01/2003   A   5,000   12/31/2005 12/31/2005 COMMON STOCK 5,000 $ 0 5,000 D  
Performance Shares (5) (6) 01/01/2004   A   5,000   12/31/2006 12/31/2006 COMMON STOCK 5,000 $ 0 5,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Miller Charles Brigham
11426 STONEY FALLS DRIVE
HOUSTON, TX 77095
      CHIEF ACCOUNTING OFFICER  

Signatures

 /s/ CHARLES BRIGHAM MILLER   12/22/2004
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The option vests in four equal annual installments beginning on April 3, 2002.
(2) The option vests in four equal annual installments beginning on September 26, 2002.
(3) The option vests in two equal annual installments beginning on September 26, 2002.
(4) The option vests in four equal annual installments beginning on March 13, 2004.
(5) Represents a grant of performance restricted shares which represent the right to receive our Common Stock in the future based on the performance of our Common Stock. None of these awards will vest unless our Common Stock performs better than the common stock of 50% of the companies comprising the Oil Service Sector Index (OSX) during the three-year period that began on the date of grant. If our Common Stock performs better than 75% of the companies comprising this index during such period, then all of the performance restricted shares will vest. If our common shares perform better than between 50% and 75% of the companies comprising the index, then an interpolated percentage of between 20% and 100% of the performance restricted shares will vest at the end of the three-year period. The executive will not receive dividends on or be entitled to vote the underlying Common Stock unless and until they have been issued at the end of the vesting period.
(6) 1 for 1

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