Détention brevets de la classe E21B 47/13

Brevets de cette classe: 1310

Historique des publications depuis 10 ans

32
33
43
79
95
145
145
90
86
66
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21002
289
Schlumberger Technology Corporation
10949
93
Saudi Arabian Oil Company
13472
74
Evolution Engineering Inc.
300
69
Schlumberger Canada Limited
7396
68
Services Petroliers Schlumberger
5850
57
Schlumberger Technology B.v.
5201
53
Baker Hughes Oilfield Operations, LLC
2353
39
Merlin Technology, Inc.
164
26
Metrol Technology Limited
85
24
Baker Hughes Incorporated
5236
20
Expro North Sea Limited
232
20
Erdos Miller, Inc.
36
20
Schlumberger Holdings Limited
2799
17
Prad Research and Development Limited
2690
17
Weatherford Technology Holdings, LLC
2036
13
ExxonMobil Upstream Research Company
2389
12
Black Diamond Oilfield Rentals LLC
67
12
ConocoPhillips Company
1682
10
Scientific Drilling International, Inc.
168
10
Autres propriétaires 367