Détention brevets de la classe E21B 47/0224

Brevets de cette classe: 106

Historique des publications depuis 10 ans

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5
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11
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9
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Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20835
26
Schlumberger Technology Corporation
10662
9
Saudi Arabian Oil Company
12947
8
Schlumberger Canada Limited
7273
5
Baker Hughes Incorporated
5277
5
Schlumberger Technology B.v.
5161
4
Landmark Graphics Corporation
1525
4
Services Petroliers Schlumberger
5772
4
Baker Hughes Oilfield Operations, LLC
2288
4
ConocoPhillips Company
1677
3
Silixa Ltd.
95
3
Schlumberger Holdings Limited
2835
2
Aramco Services Company
3929
2
Iluka Resources Limited
37
2
Institute of Geology and Geophysics, Chinese Academy of Sciences
324
2
Pipelines 2 Data (p2d) Limited
18
2
Prad Research and Development Limited
2693
2
Baker Hughes, a GE Company, LLC
2114
2
Equinor Energy AS
491
2
The Regents of the University of California
19857
1
Autres propriétaires 14