Détention brevets de la classe E21B 47/14

Brevets de cette classe: 867

Historique des publications depuis 10 ans

62
63
74
77
70
93
50
68
37
13
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20684
219
Schlumberger Technology Corporation
10591
79
Schlumberger Canada Limited
7201
44
ExxonMobil Upstream Research Company
2414
39
Baker Hughes Oilfield Operations, LLC
2251
37
Services Petroliers Schlumberger
5739
34
Schlumberger Technology B.v.
5138
32
Saudi Arabian Oil Company
12785
28
Baker Hughes Incorporated
5301
21
Baker Hughes, a GE Company, LLC
2115
18
Metrol Technology Limited
84
14
Schlumberger Holdings Limited
2847
13
Weatherford Technology Holdings, LLC
2009
13
Prad Research and Development Limited
2695
12
Evolution Engineering Inc.
301
10
Expro North Sea Limited
225
7
Institute of Geology and Geophysics, Chinese Academy of Sciences
321
7
Aramco Services Company
3894
6
Acoustic Data Limited
16
6
Lytt Limited
50
6
Autres propriétaires 222