Détention brevets de la classe E21B 33/072

Brevets de cette classe: 177

Historique des publications depuis 10 ans

10
9
9
9
17
9
5
8
11
5
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Saudi Arabian Oil Company
13224
12
Schlumberger Technology Corporation
10780
10
Schlumberger Technology B.v.
5176
10
Halliburton Energy Services, Inc.
20911
10
Cameron International Corporation
1335
9
National Oilwell Varco UK Limited
33
9
Schlumberger Canada Limited
7332
8
Services Petroliers Schlumberger
5803
8
Schlumberger Holdings Limited
2817
5
Prad Research and Development Limited
2693
5
Aramco Services Company
3987
4
FMC Kongsberg Subsea AS
186
4
Cameron Technologies Limited
212
4
Weatherford Technology Holdings, LLC
2023
3
Expro North Sea Limited
231
3
FMC Technologies, Inc.
609
3
Baker Hughes Oilfield Operations, LLC
2302
3
Altus Intervention (technologies) AS
66
3
Well-centric Oilfield Services Ltd
3
3
Baker Hughes Incorporated
5274
2
Autres propriétaires 59