Détention brevets de la classe E21B 31/20

Brevets de cette classe: 193

Historique des publications depuis 10 ans

12
13
17
17
18
19
13
13
12
6
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Ardyne Holdings Limited
88
29
Saudi Arabian Oil Company
13224
18
Weatherford Technology Holdings, LLC
2023
11
Halliburton Energy Services, Inc.
20911
8
Baker Hughes Holdings LLC
3007
7
Qinterra Technologies AS
38
6
Wellbore Integrity Solutions LLC
90
5
Welltec AS
298
4
Baker Hughes Oilfield Operations, LLC
2302
4
Archer Oiltools AS
32
4
Baker Hughes Incorporated
5274
3
2M-TEK, Inc.
9
3
Baker Hughes, a GE Company, LLC
2110
3
Epiroc Canada Inc.
18
3
Vertice Oil Tools Inc.
94
3
Vangaard Downhole Inc.
5
3
Tubular Technology Tools LLC
5
3
Boart Longyear Company
15
3
Schlumberger Technology Corporation
10780
2
Bly IP Inc.
31
2
Autres propriétaires 69