Détention brevets de la classe E21B 37/00

Brevets de cette classe: 1034

Historique des publications depuis 10 ans

90
101
115
101
89
82
92
74
47
10
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20165
132
Saudi Arabian Oil Company
11322
95
Baker Hughes Incorporated
5689
43
Baker Hughes Holdings LLC
3060
35
Schlumberger Technology Corporation
9690
33
ConocoPhillips Company
1657
24
Baker Hughes, a GE Company, LLC
2171
22
Schlumberger Canada Limited
6913
19
Services Petroliers Schlumberger
5426
18
Schlumberger Technology B.v.
4951
17
Baker Hughes Oilfield Operations, LLC
1885
17
Hydra Systems AS
38
16
Aramco Services Company
3504
15
M-I L.L.C.
893
15
Weatherford Technology Holdings, LLC
2135
14
Odfjell Well Services Norway AS
18
14
Altus Intervention (technologies) AS
60
14
Schlumberger Holdings Limited
2947
13
Petroleo Brasileiro S.A. - Petrobras
730
13
Prad Research and Development Limited
2696
11
Autres propriétaires 454