Détention brevets de la classe E21B 47/14

Brevets de cette classe: 861

Historique des publications depuis 10 ans

62
63
74
77
70
93
50
68
37
10
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20621
218
Schlumberger Technology Corporation
10495
77
Schlumberger Canada Limited
7142
43
ExxonMobil Upstream Research Company
2414
39
Baker Hughes Oilfield Operations, LLC
2205
37
Services Petroliers Schlumberger
5701
33
Schlumberger Technology B.v.
5115
32
Saudi Arabian Oil Company
12648
28
Baker Hughes Incorporated
5323
21
Baker Hughes, a GE Company, LLC
2115
18
Metrol Technology Limited
84
14
Schlumberger Holdings Limited
2852
13
Weatherford Technology Holdings, LLC
2007
13
Prad Research and Development Limited
2696
12
Evolution Engineering Inc.
301
10
Expro North Sea Limited
224
7
Institute of Geology and Geophysics, Chinese Academy of Sciences
319
7
Aramco Services Company
3863
6
Acoustic Data Limited
16
6
Lytt Limited
52
6
Autres propriétaires 221