Détention brevets de la classe E21B 49/06

Brevets de cette classe: 238

Historique des publications depuis 10 ans

10
17
7
9
12
10
6
7
7
1
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Schlumberger Technology Corporation
11404
39
Halliburton Energy Services, Inc.
21153
27
Schlumberger Canada Limited
7550
23
Schlumberger Technology B.v.
5263
20
Services Petroliers Schlumberger
5966
20
Schlumberger Holdings Limited
2751
15
Saudi Arabian Oil Company
13921
15
Prad Research and Development Limited
2681
14
Baker Hughes Incorporated
5082
9
China Oilfield Services Limited
91
6
China National Offshore Oil Corporation
91
5
Baker Hughes, a GE Company, LLC
2103
5
Aramco Services Company
4164
3
ENI S.p.A.
1304
3
Tracto-Technik GmbH & Co. KG
170
3
BP Exploration Operating Company Limited
260
2
GDF Suez
37
2
Landmark Graphics Corporation
1509
1
Big Guns Energy Services Inc.
7
1
CGG Services SA
431
1
Autres propriétaires 24