Détention brevets de la classe E21B 23/03

Brevets de cette classe: 206

Historique des publications depuis 10 ans

15
20
17
16
17
21
15
24
12
6
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20165
28
Baker Hughes Oilfield Operations, LLC
1885
14
Petroleum Technology Company AS
98
12
Schlumberger Technology Corporation
9690
11
Cameron International Corporation
1305
9
Weatherford Technology Holdings, LLC
2135
7
Saudi Arabian Oil Company
11322
7
Evolution Engineering Inc.
313
5
Impact Selector International, LLC
117
5
Welltec AS
301
5
Baker Hughes, a GE Company, LLC
2171
5
Baker Hughes Holdings LLC
3060
5
Baker Hughes Incorporated
5689
4
Schlumberger Canada Limited
6913
3
Schlumberger Technology B.v.
4951
3
Aarbakke Innovation A.S.
33
3
Aker Well Service AS
21
3
Gulfstream Services, Inc.
53
3
Services Petroliers Schlumberger
5426
3
Shell Oil Company
2196
2
Autres propriétaires 69