Détention brevets de la classe E21B 47/008

Brevets de cette classe: 561

Historique des publications depuis 10 ans

11
27
21
20
51
60
57
56
46
3
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20419
99
Schlumberger Technology Corporation
10241
53
Schlumberger Canada Limited
7147
43
Services Petroliers Schlumberger
5626
36
Saudi Arabian Oil Company
12423
31
Schlumberger Technology B.v.
5068
28
Baker Hughes Oilfield Operations, LLC
2120
18
Schlumberger Holdings Limited
2867
15
Prad Research and Development Limited
2696
15
BJ Energy Solutions, LLC (formerly TES Asset Acquisition, LLC)
209
15
Sensia LLC
140
14
Weatherford Technology Holdings, LLC
2105
11
Baker Hughes Incorporated
5508
10
Schneider Electric Systems USA, Inc.
434
10
Geoquest Systems B.V.
681
8
ExxonMobil Upstream Research Company
2454
6
ExxonMobil Technology and Engineering Company
913
6
Landmark Graphics Corporation
1521
4
Aramco Services Company
3744
4
Kelvin Inc.
13
4
Autres propriétaires 131