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 *
DENSON JOHN D
   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)
VP, Counsel & Secretary
(Last)
(First)
(Middle)
6316 WINDFERN		 3. Date of Earliest Transaction (Month/Day/Year)
02/21/2007
(Street)

HOUSTON, TX 77040		 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 02/21/2007   M   9,812 A $ 18.375 123,877 D  
Common Shares 02/21/2007   M   13,536 A $ 13.0625 137,413 D  
Common Shares 02/21/2007   M   6,108 A $ 19.375 143,521 D  
Common Shares 02/21/2007   M   30,000 A $ 16.1 173,521 D  
Common Shares 02/21/2007   M   31,000 A $ 10.26 204,521 D  
Common Shares 02/21/2007   M   22,624 A $ 8.84 227,145 D  
Common Shares 02/21/2007   F   44,215 D $ 79.31 182,930 D  
Common Shares               16,469 I 401(k) Plan

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
Option to Acquire Common Shares $ 18.375 02/21/2007   M     9,812 02/11/2002 02/11/2008 Common Shares 9,812 $ 0 0 D  
Option to Acquire Common Shares $ 13.0625 02/21/2007   M     13,536 04/07/2003 04/07/2009 Common Shares 13,536 $ 0 0 D  
Option to Acquire Common Shares $ 19.375 02/21/2007   M     6,108 02/23/2004 02/23/2010 Common Shares 6,108 $ 0 0 D  
Option to Acquire Common Shares $ 16.1 02/21/2007   M     30,000 04/03/2005 04/03/2011 Common Shares 30,000 $ 0 0 D  
Option to Acquire Common Shares $ 10.26 02/21/2007   M     31,000 09/26/2005 09/26/2011 Common Shares 31,000 $ 0 0 D  
Option to Acquire Common Shares $ 8.84 02/21/2007   M     22,624 12/31/2005 03/13/2013 Common Shares 22,624 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
DENSON JOHN D
6316 WINDFERN
HOUSTON, TX 77040		       VP, Counsel & Secretary  

Signatures

 /s/ John D. Denson   02/23/2007
**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).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

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