Détention brevets de la classe E21B 47/0224

Brevets de cette classe: 104

Historique des publications depuis 10 ans

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6
3
11
15
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9
8
2
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Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21144
26
Schlumberger Technology Corporation
11349
9
Saudi Arabian Oil Company
13904
8
Schlumberger Canada Limited
7524
5
Baker Hughes Incorporated
5088
5
Schlumberger Technology B.v.
5259
4
Landmark Graphics Corporation
1509
4
Services Petroliers Schlumberger
5945
4
Baker Hughes Oilfield Operations, LLC
2424
4
ConocoPhillips Company
1699
3
Schlumberger Holdings Limited
2753
2
Iluka Resources Limited
36
2
Institute of Geology and Geophysics, Chinese Academy of Sciences
340
2
Pipelines 2 Data (p2d) Limited
18
2
Prad Research and Development Limited
2683
2
Silixa Ltd.
92
2
Baker Hughes, a GE Company, LLC
2105
2
Equinor Energy AS
499
2
The Regents of the University of California
20447
1
Chevron U.S.A. Inc.
4073
1
Autres propriétaires 14