Détention brevets de la classe E21B 23/03

Brevets de cette classe: 243

Historique des publications depuis 10 ans

17
16
17
21
15
24
13
26
15
7
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21320
39
Baker Hughes Oilfield Operations, LLC
2521
21
Schlumberger Technology Corporation
11798
14
Petroleum Technology Company AS
95
12
Saudi Arabian Oil Company
14207
12
Weatherford Technology Holdings, LLC
2154
10
Cameron International Corporation
1368
9
Evolution Engineering Inc.
301
5
Welltec AS
312
5
Baker Hughes, a GE Company, LLC
2057
4
Baker Hughes Holdings LLC
3023
4
Schlumberger Canada Limited
7606
3
Schlumberger Technology B.v.
5298
3
Baker Hughes Incorporated
4940
3
Aarbakke Innovation A.S.
30
3
Aker Well Service AS
19
3
Gulfstream Services, Inc.
58
3
Services Petroliers Schlumberger
6024
3
Abu Dhabi National Oil Company
102
3
Shell Oil Company
2075
2
Autres propriétaires 82