Exhibit 21
Significant Subsidiaries
Listed below are the significant first tier subsidiaries of the Registrant, along with the total number of active subsidiaries directly or indirectly owned by each as of February 10, 2005. Certain second, third and fourth tier subsidiaries, though included in the numbers, are also shown by name. Ownership is 100% unless otherwise indicated. The business activities of the subsidiaries have been keyed as follows: (a) Oilfield Services, (b) WesternGeco, (c) General/Multiple.
U.S. | Non-U.S. | ||||
Schlumberger B.V., Netherlands (c) | 40 12 11 | (a)1 (b)2 (c) | |||
Schlumberger Canada Limited, Ontario (c) | |||||
Schlumberger SA, France (c) | |||||
Services Petroliers Schlumberger, France (a) | |||||
*WesternGeco B.V., Netherlands (b) | |||||
WesternGeco A.S., Norway (b) | |||||
Schlumberger Antilles N.V., Netherlands Antilles (a) | 4(a) | ||||
Schlumberger Offshore Services N.V. (Limited), Netherlands Antilles (a) | |||||
Schlumberger Oilfield Holdings Limited, BVI (c) | 150(a)3 26(b)4 22(c)5 | | |||
MC&C Holdings Limited, BVI (c) | |||||
Schlumberger Plc, UK (c) | |||||
Schlumberger Evaluation and Production Services (UK) Limited, UK (a) | |||||
*WesternGeco Limited, UK (b) | |||||
Dowell Schlumberger Corporation, BVI (a) | |||||
Schlumberger Holdings Limited, BVI (a) | |||||
Schlumberger Middle East S.A., Panama (a) | |||||
Schlumberger Overseas, S.A., Panama (a) | |||||
Schlumberger Seaco, Inc., Panama (a) | |||||
Schlumberger Surenco, S.A., Panama (a) | |||||
*WesternGeco Seismic Holdings Limited, BVI (b) | |||||
Schlumberger Technology Corporation, Texas (c) | 4(a)6 3(b)7 5(c) | 1(b) | |||
*WesternGeco L.L.C., Delaware (b) | |||||
*70% owned by Registrant |
1 | Includes two majority-owned subsidiaries and one 50%-owned subsidiary. |
2 | Includes three majority-owned subsidiaries, one of which is named, and one 50%-owned subsidiary. |
3 | Includes six majority-owned subsidiaries and three 50%-owned subsidiaries. |
4 | Includes five majority-owned subsidiaries, two of which are named. |
5 | Includes one majority-owned subsidiary. |
6 | Includes one majority-owned subsidiary and one 50%-owned subsidiary. |
7 | Includes two majority-owned subsidiaries, one of which is named. |
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