Détention brevets de la classe E21B 47/008

Brevets de cette classe: 658

Historique des publications depuis 10 ans

27
21
20
51
60
58
58
53
61
23
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21305
110
Schlumberger Technology Corporation
11839
62
Schlumberger Canada Limited
7609
51
Saudi Arabian Oil Company
14275
47
Services Petroliers Schlumberger
6028
41
Schlumberger Technology B.v.
5295
30
Baker Hughes Oilfield Operations, LLC
2534
23
BJ Energy Solutions, LLC (formerly TES Asset Acquisition, LLC)
230
16
Schlumberger Holdings Limited
2690
15
Weatherford Technology Holdings, LLC
2160
15
Prad Research and Development Limited
2655
15
Sensia LLC
130
14
Geoquest Systems B.V.
879
11
Baker Hughes Incorporated
4922
10
Aramco Services Company
4194
10
Schneider Electric Systems USA, Inc.
429
9
ExxonMobil Technology and Engineering Company
1373
7
Landmark Graphics Corporation
1505
6
ExxonMobil Upstream Research Company
2297
6
Chevron U.S.A. Inc.
4145
3
Autres propriétaires 157