Détention brevets de la classe E21B 47/14

Brevets de cette classe: 885

Historique des publications depuis 10 ans

62
63
71
77
68
93
50
70
38
24
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20908
223
Schlumberger Technology Corporation
10745
80
Schlumberger Canada Limited
7298
45
ExxonMobil Upstream Research Company
2394
39
Baker Hughes Oilfield Operations, LLC
2313
37
Services Petroliers Schlumberger
5788
35
Schlumberger Technology B.v.
5163
33
Saudi Arabian Oil Company
13206
33
Baker Hughes Incorporated
5238
20
Baker Hughes, a GE Company, LLC
2112
18
Metrol Technology Limited
85
14
Schlumberger Holdings Limited
2819
13
Weatherford Technology Holdings, LLC
2024
13
Prad Research and Development Limited
2693
12
Evolution Engineering Inc.
301
10
Expro North Sea Limited
231
7
Institute of Geology and Geophysics, Chinese Academy of Sciences
326
7
Aramco Services Company
3981
6
Acoustic Data Limited
16
6
Lytt Limited
51
6
Autres propriétaires 228