Détention brevets de la classe E21B 47/14

Brevets de cette classe: 840

Historique des publications depuis 10 ans

72
63
63
74
76
70
93
50
64
17
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20165
212
Schlumberger Technology Corporation
9690
73
Schlumberger Canada Limited
6913
41
Baker Hughes Oilfield Operations, LLC
1885
40
ExxonMobil Upstream Research Company
2525
39
Services Petroliers Schlumberger
5426
33
Schlumberger Technology B.v.
4951
32
Saudi Arabian Oil Company
11322
26
Baker Hughes Incorporated
5689
22
Baker Hughes, a GE Company, LLC
2171
18
Metrol Technology Limited
85
16
Schlumberger Holdings Limited
2947
14
Weatherford Technology Holdings, LLC
2135
13
Prad Research and Development Limited
2696
12
Evolution Engineering Inc.
313
10
Expro North Sea Limited
215
7
Aramco Services Company
3504
6
Institute of Geology and Geophysics, Chinese Academy of Sciences
276
6
Lytt Limited
51
6
Chevron U.S.A. Inc.
3774
5
Autres propriétaires 209