Détention brevets de la classe E21B 47/14

Brevets de cette classe: 885

Historique des publications depuis 10 ans

56
57
68
67
60
79
45
67
35
26
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21006
225
Schlumberger Technology Corporation
10994
83
Schlumberger Canada Limited
7410
44
ExxonMobil Upstream Research Company
2382
39
Baker Hughes Oilfield Operations, LLC
2376
37
Services Petroliers Schlumberger
5866
35
Schlumberger Technology B.v.
5210
33
Saudi Arabian Oil Company
13569
33
Baker Hughes Incorporated
5190
20
Baker Hughes, a GE Company, LLC
2107
18
Metrol Technology Limited
85
14
Weatherford Technology Holdings, LLC
2029
13
Schlumberger Holdings Limited
2795
12
Prad Research and Development Limited
2688
12
Evolution Engineering Inc.
300
10
Expro North Sea Limited
232
7
Institute of Geology and Geophysics, Chinese Academy of Sciences
334
7
Aramco Services Company
4077
6
Acoustic Data Limited
15
6
Lytt Limited
51
6
Autres propriétaires 225