Détention brevets de la classe E21B 23/03

Brevets de cette classe: 224

Historique des publications depuis 10 ans

20
17
16
17
21
15
25
13
18
7
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20769
29
Baker Hughes Oilfield Operations, LLC
2273
18
Schlumberger Technology Corporation
10641
13
Petroleum Technology Company AS
98
12
Saudi Arabian Oil Company
12891
10
Cameron International Corporation
1329
9
Weatherford Technology Holdings, LLC
2012
8
Evolution Engineering Inc.
301
5
Impact Selector International, LLC
114
5
Welltec AS
297
5
Baker Hughes Holdings LLC
3006
5
Baker Hughes, a GE Company, LLC
2114
4
Schlumberger Canada Limited
7244
3
Schlumberger Technology B.v.
5154
3
Baker Hughes Incorporated
5281
3
Aarbakke Innovation A.S.
29
3
Aker Well Service AS
21
3
Gulfstream Services, Inc.
58
3
Hunting Titan, Inc.
245
3
Services Petroliers Schlumberger
5763
3
Autres propriétaires 77