EXHIBIT 21.1

		Percentage
Name	Legal Seat	Ownership
AGI Mexicana, S.A. de C.V.	Mexico City, Mexico		100	%
Beukenwoude, B.V.	Amsterdam, Netherlands		100	%
Coherence Technology (U.K.) Ltd.	Edinburgh, United Kingdom		100	%
Core Export Sales, Inc.	Bridgetown, Barbados		100	%
Core Lab de Mexico, S.A. de C.V.	Mexico City, Mexico		100	%
Core Lab Operations S.A. de C.V.	Mexico		100	%
Core Lab Services S.A. de C.V.	Mexico		100	%
Core Laboratories (Barbados) Ltd.
Core Laboratories I.P. Inc.
Core Laboratories Holding Inc.
Core Laboratories Middle East Services BV
Core Laboratories Resources, N.V.	Curacao, Netherlands Antilles		100	%
Core Laboratories International Licensing N.V.	Curacao, Netherlands Antilles		100	%
Core Laboratories International Trading N.V.	Curacao, Netherlands Antilles		100	%
Core Laboratories (H.K.) Limited	Hong Kong		100	%
Core Laboratories (U.K.) Limited	London, United Kingdom		100	%
Core Laboratories Angola Ltd.	Angola		100	%
Core Laboratories Australia PTY LTD	Perth, Australia		100	%
Core Laboratories Canada Limited	Alberta, Canada		100	%
Core Laboratories Global N.V.	Curacao, Netherlands Antilles		100	%
Core Laboratories LLP (Kazakhstan)
Core Laboratories LP	Delaware, United States		100	%
Core Laboratories International B.V.	Amsterdam, The Netherlands		100	%
Core Laboratories Mexico Holding B.V.	Netherlands		100	%
Core Laboratories Netherlands B.V.	Amsterdam, The Netherlands		100	%
Core Laboratories Panama, S.A.	Panama City, Panama		100	%
Core Laboratories Sales N.V.	Curacao, Netherlands Antilles		100	%
Core Laboratories SDN BHD	Kuala Lumpur, Malaysia		100	%
Core Laboratories Venezuela S.A.	Caracas, Venezuela		100	%
Corelab Brasil Ltda	Brasil		100	%
Corelab Nigeria Limited	Lagos, Nigeria		100	%
CTC Pulsonic Nigeria Limited	Lagos, Nigeria		80	%
E.W. Saybolt & Co. S.A.	Panama City, Panama		100	%
Jaex de Mexico, S.A. de C.V.	Tabasco, Mexico		100	%
Lab Technics
Organic Technology LP	Texas, United States		100	%
Owen Compliance Services, Inc.	Texas, United States		100	%
Owen de Mexico S.A. de C.V.	Mexico		100	%
Owen Oil Tools (U.K.) Ltd.	Croydon, United Kingdom		100	%
Owen Oil Tools de Venezuela, C.A.	Anaco, Anzoategui, Venezuela		100	%
Owen Oil Tools LP	Texas, United States		100	%
PENCOR de Mexico S.A. de C.V.	Mexico		100	%
PENCOR de Venezuela, C.A.	Venezuela		100	%
PENCOR International Ltd.	Jersey Channel Islands		100	%
PENCOR Ltd.	United Kingdom		100	%
Petroleum Analysts ZAO	Moscow, Russia Federation		98	%
Pro Technics de Mexico, S.A. de C.V.	Mexico		100	%
Production Services de Venezuela, C.A.	Venezuela		100	%
PT Corelab Indonesia	Jakarta, Indonesia		70	%
PT Saybolt Indonesia	Jakarta, Indonesia		65	%

		Percentage
Name	Legal Seat	Ownership
Saybolt (Portugal) Inspeccao de Productos     Petroliferos, Lda	Lisbon, Portugal		100	%
Saybolt (Singapore) PTE LTD	Singapore		100	%
Saybolt (Tianjin) Meteorology &     Instrumentation Company	China		100	%
Saybolt Analyt Holding B.V.	Vlaardingen, The Netherlands		90	%
Saybolt Armenia	Yerevan, Armenia		90	%
Saybolt Aruba N.V.	Aruba, Netherlands Antilles		100	%
Saybolt Azerbaijan BV Saybolt Azerbaijan, Ltd.	Azerbaijan		100	%
Saybolt Bahamas Ltd.	Freeport, Bahamas		100	%
Saybolt Bahrein
Saybolt Baltic OU Saybolt Baltija, Ltd.	Klaipeda, Lithuania		88.2	%
Saybolt Bashkortostan	Bashkortostan, Russian Federation		54	%
Saybolt Belgium	Belgium		100	%
Saybolt Bonaire N.V.	Bonaire, Netherlands Antilles		100	%
Saybolt Bulgaria Ltd	Bulgaria		90	%
Saybolt Colombia Ltda.	Barranquilla, Colombia		95	%
Saybolt Curacao N.V.	Curacao, Netherlands Antilles		100	%
Saybolt Denmark A/S	Copenhagen, Denmark		100	%
Saybolt de Costa Rica, S.A.	San Jose, Costa Rica		100	%
Saybolt de Mexico S.A. de C.V.	Coatzacoalcos, Mexico		100	%
Saybolt Eastern Hemisphere B.V.	Vlaardingen, The Netherlands		100	%
Saybolt Espana S.A.	Madrid, Spain		100	%
Saybolt Estonia Ltd.	Tallin, Estonia		90	%
Saybolt Evrasia ZAO	Moscow, Russia Federation		90.1	%
Saybolt Finland Oy	Hamina, Finland		100	%
Saybolt France S.A.	Port-Le-Bouc, France		99.5	%
Saybolt Greece, Ltd.	Athens, Greece		100	%
Saybolt Holding B.V.	Vlaardingen, The Netherlands		100	%
Saybolt LP	New Jersey, United States		100	%
Saybolt International B.V.	Vlaardingen, The Netherlands		100	%
Saybolt Iran B.V.	Vlaardingen, The Netherlands		100	%
Saybolt Italia S.R.L.	Siracusa, Italy		100	%
Saybolt Latin America Holding B.V.	Vlaardingen, The Netherlands		100	%
Saybolt Latvia	Ventspils, Latvia		88.2	%
Saybolt (M) SDN BHD	Kuala Lumpur, Malaysia		100	%
Saybolt Malta Ltd.	Kalafran, Malta		100	%
Saybolt Meteorology & Instrumentation B.V.	Vlaardingen, The Netherlands		100	%
Saybolt Mongol JLC Saybolt Nederland B.V.	Vlaardingen, The Netherlands		97.5	%
Saybolt North American Holding B.V.	Vlaardingen, The Netherlands		100	%
Saybolt Qatar Saybolt Saudi Arabia Saybolt Services Ltd.     formerly Petrak Services Ltd.	London, United Kingdom		100	%
Saybolt South Africa PTY LTD	Cape Town, South Africa		100	%
Saybolt Sverige AB	Gothenburg, Sweden		100	%
Saybolt Test OOO	Bashkortostan, Russian Federation		54	%

		Percentage
Name	Legal Seat	Ownership
Saybolt Thailand Ltd.	Bangkok, Thailand		100	%
Saybolt Trinidad & Tobago Ltd.	Marabella, Trinidad		100	%
DP Saybolt Turkmenistan formerly Petrak Turkmenistan Ltd.	Turkmenbashi, Turkmenistan		100	%
Saybolt United Kingdom Ltd.	Purfleet, United Kingdom		100	%
Saybolt van Duyn GmbH	Essen, Germany		100	%
Saybolt West Indies N.V	Kingston, Jamaica		100	%
Saybolt-Ukraine	Odessa, Ukraine		100	%
Scott Pickford Group Limited	Croydon, United Kingdom		100	%
Scott Pickford Limited	Croydon, United Kingdom		100	%
SP TOO Saybolt Kazakhstan	Kazakhstan		81	%
Stim Lab, Inc.	Oklahoma, United States		100	%
The Petrak Group S.A.	Zug, Switzerland		100	%