Détention brevets de la classe E21B 47/022

Brevets de cette classe: 1135

Historique des publications depuis 10 ans

130
101
157
65
68
44
51
35
36
5
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20419
312
Schlumberger Technology Corporation
10241
100
Schlumberger Canada Limited
7147
55
Services Petroliers Schlumberger
5626
44
Schlumberger Technology B.v.
5068
41
Saudi Arabian Oil Company
12423
32
Baker Hughes Incorporated
5508
31
Prad Research and Development Limited
2696
30
Schlumberger Holdings Limited
2867
29
Gyrodata, Incorporated
89
22
Scientific Drilling International, Inc.
164
22
Nabors Drilling Technologies USA, Inc.
547
19
Motive Drilling Technologies, Inc.
97
18
Merlin Technology, Inc.
164
14
Landmark Graphics Corporation
1521
13
Baker Hughes, a GE Company, LLC
2138
13
Bench Tree Group, LLC
65
9
ConocoPhillips Company
1677
9
Institute of Geology and Geophysics, Chinese Academy of Sciences
308
9
Magnetic Variation Services, LLC
37
9
Autres propriétaires 304