Détention brevets de la classe E21B 47/103

Brevets de cette classe: 91

Historique des publications depuis 10 ans

2
4
10
12
7
4
8
7
9
3
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Saudi Arabian Oil Company
14416
13
Halliburton Energy Services, Inc.
21300
9
Schlumberger Technology Corporation
12005
8
ExxonMobil Upstream Research Company
2276
4
Lytt Limited
44
4
Schlumberger Canada Limited
7622
3
Schlumberger Technology B.v.
5294
3
Chevron U.S.A. Inc.
4186
3
Services Petroliers Schlumberger
6032
3
Baker Hughes Oilfield Operations, LLC
2560
3
Baker Hughes Incorporated
4861
2
Aramco Services Company
4191
2
OptaSense Holdings Limited
178
2
Torsch Inc.
44
2
Ventbuster Holdings Inc.
10
2
ExxonMobil Technology and Engineering Company
1440
2
Tgt Oil Well Equipment Factory - sole Proprietorship L.L.C.
8
2
Schlumberger Norge AS
72
1
Schlumberger Holdings Limited
2656
1
China National Petroleum Corporation
649
1
Autres propriétaires 21