Détention brevets de la classe E21B 47/005

Brevets de cette classe: 571

Historique des publications depuis 10 ans

25
30
31
38
72
55
63
59
71
36
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21338
196
Schlumberger Technology Corporation
11818
70
Baker Hughes Oilfield Operations, LLC
2527
38
Saudi Arabian Oil Company
14235
29
Schlumberger Canada Limited
7606
27
Services Petroliers Schlumberger
6024
22
Schlumberger Technology B.v.
5298
19
William Marsh Rice University
1070
8
Southwest Petroleum University
521
6
Statoil Petroleum AS
469
6
Chevron U.S.A. Inc.
4140
5
ConocoPhillips Company
1709
5
Expro North Sea Limited
227
5
Archer Oiltools AS
45
5
Landmark Graphics Corporation
1508
4
Weatherford Technology Holdings, LLC
2155
4
Equinor Energy AS
495
4
Triad National Security, LLC
634
4
Case360 Limited
9
4
Aramco Services Company
4195
3
Autres propriétaires 107