Détention brevets de la classe E21B 33/072

Brevets de cette classe: 184

Historique des publications depuis 10 ans

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9
9
17
9
5
8
11
10
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Propriétaires principaux

Proprétaire
Total
Cette classe
Saudi Arabian Oil Company
13814
12
Schlumberger Technology Corporation
11238
11
Schlumberger Technology B.v.
5239
10
Halliburton Energy Services, Inc.
21117
10
Cameron International Corporation
1357
9
National Oilwell Varco UK Limited
33
9
Schlumberger Canada Limited
7485
8
Services Petroliers Schlumberger
5916
8
Schlumberger Holdings Limited
2757
5
Prad Research and Development Limited
2686
5
Aramco Services Company
4147
4
FMC Kongsberg Subsea AS
192
4
Baker Hughes Oilfield Operations, LLC
2402
4
Cameron Technologies Limited
221
4
Weatherford Technology Holdings, LLC
2033
3
Expro North Sea Limited
237
3
FMC Technologies, Inc.
606
3
Petroleo Brasileiro S.A. - Petrobras
906
3
Altus Intervention (technologies) AS
68
3
Well-centric Oilfield Services Ltd
3
3
Autres propriétaires 63