Détention brevets de la classe E21B 47/022

Brevets de cette classe: 1158

Historique des publications depuis 10 ans

108
87
125
56
57
40
44
31
36
34
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20946
313
Schlumberger Technology Corporation
10881
107
Schlumberger Canada Limited
7366
53
Services Petroliers Schlumberger
5828
45
Schlumberger Technology B.v.
5183
42
Saudi Arabian Oil Company
13372
38
Baker Hughes Incorporated
5248
30
Prad Research and Development Limited
2692
30
Schlumberger Holdings Limited
2803
29
Gyrodata, Incorporated
87
22
Scientific Drilling International, Inc.
168
22
Motive Drilling Technologies, Inc.
103
19
Nabors Drilling Technologies USA, Inc.
562
19
Merlin Technology, Inc.
162
14
Landmark Graphics Corporation
1523
13
Baker Hughes, a GE Company, LLC
2110
13
Magnetic Variation Services, LLC
38
10
Bench Tree Group, LLC
63
9
ConocoPhillips Company
1675
9
Institute of Geology and Geophysics, Chinese Academy of Sciences
326
9
Autres propriétaires 312