Détention brevets de la classe E21B 47/14

Brevets de cette classe: 888

Historique des publications depuis 10 ans

57
68
67
60
79
45
67
35
30
5
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21107
229
Schlumberger Technology Corporation
11266
83
Schlumberger Canada Limited
7487
44
ExxonMobil Upstream Research Company
2359
39
Baker Hughes Oilfield Operations, LLC
2402
38
Services Petroliers Schlumberger
5921
35
Schlumberger Technology B.v.
5242
33
Saudi Arabian Oil Company
13839
33
Baker Hughes Incorporated
5131
20
Baker Hughes, a GE Company, LLC
2101
18
Weatherford Technology Holdings, LLC
2032
14
Metrol Technology Limited
85
14
Schlumberger Holdings Limited
2755
12
Prad Research and Development Limited
2685
12
Evolution Engineering Inc.
300
10
Expro North Sea Limited
237
7
Institute of Geology and Geophysics, Chinese Academy of Sciences
336
7
Aramco Services Company
4154
6
Acoustic Data Limited
15
6
Lytt Limited
51
6
Autres propriétaires 222