Détention brevets de la classe E21B 31/16

Brevets de cette classe: 124

Historique des publications depuis 10 ans

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Propriétaires principaux

Proprétaire
Total
Cette classe
Ardyne Holdings Limited
60
16
Saudi Arabian Oil Company
14275
15
Weatherford Technology Holdings, LLC
2160
14
Baker Hughes Incorporated
4922
6
Robertson Intellectual Properties, LLC
94
6
Aramco Services Company
4194
4
Baker Hughes Oilfield Operations, LLC
2534
4
Downing Wellhead Equipment, LLC
52
4
Baker Hughes Holdings LLC
3023
4
Schlumberger Technology Corporation
11839
3
Schlumberger Canada Limited
7609
2
Schlumberger Technology B.v.
5295
2
Halliburton Energy Services, Inc.
21305
2
Archer Oil Tools AS
18
2
Qinterra Technologies AS
34
2
Services Petroliers Schlumberger
6028
2
TCO AS
74
2
TIW Corporation
29
2
Welltec AS
318
2
Archer Oiltools AS
45
2
Autres propriétaires 28