Détention brevets de la classe E21B 49/06

Brevets de cette classe: 231

Historique des publications depuis 10 ans

6
9
11
18
8
9
13
9
6
3
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024

Propriétaires principaux

Proprétaire
Total
Cette classe
Schlumberger Technology Corporation
9690
34
Halliburton Energy Services, Inc.
20165
27
Schlumberger Canada Limited
6913
22
Schlumberger Technology B.v.
4951
20
Services Petroliers Schlumberger
5426
20
Schlumberger Holdings Limited
2947
17
Prad Research and Development Limited
2696
14
Saudi Arabian Oil Company
11322
14
Baker Hughes Incorporated
5689
10
Baker Hughes, a GE Company, LLC
2171
5
China National Offshore Oil Corporation
86
4
China Oilfield Services Limited
79
4
Aramco Services Company
3504
3
Tracto-Technik GmbH & Co. KG
166
3
BP Exploration Operating Company Limited
270
2
ENI S.p.A.
1241
2
GDF Suez
43
2
Prad Research and Development NV
264
2
Landmark Graphics Corporation
1526
1
Big Guns Energy Services Inc.
7
1
Autres propriétaires 24