Détention brevets de la classe E21B 23/03

Brevets de cette classe: 232

Historique des publications depuis 10 ans

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Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21006
32
Baker Hughes Oilfield Operations, LLC
2376
20
Schlumberger Technology Corporation
10994
14
Petroleum Technology Company AS
98
12
Saudi Arabian Oil Company
13569
12
Cameron International Corporation
1350
9
Weatherford Technology Holdings, LLC
2029
8
Evolution Engineering Inc.
300
5
Impact Selector International, LLC
112
5
Welltec AS
300
5
Baker Hughes, a GE Company, LLC
2107
4
Baker Hughes Holdings LLC
3006
4
Schlumberger Canada Limited
7410
3
Schlumberger Technology B.v.
5210
3
Baker Hughes Incorporated
5190
3
Aarbakke Innovation A.S.
30
3
Aker Well Service AS
21
3
Gulfstream Services, Inc.
58
3
Hunting Titan, Inc.
246
3
Services Petroliers Schlumberger
5866
3
Autres propriétaires 78