Détention brevets de la classe E21B 47/09

Brevets de cette classe: 1828

Historique des publications depuis 10 ans

164
197
153
110
113
86
62
66
67
16
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21217
443
Schlumberger Technology Corporation
11485
134
Saudi Arabian Oil Company
13953
104
Baker Hughes Incorporated
5041
73
Schlumberger Canada Limited
7558
66
Services Petroliers Schlumberger
5977
57
Schlumberger Technology B.v.
5267
52
Schlumberger Holdings Limited
2735
30
Baker Hughes, a GE Company, LLC
2094
30
Motive Drilling Technologies, Inc.
103
29
Prad Research and Development Limited
2679
28
Weatherford Technology Holdings, LLC
2068
26
Landmark Graphics Corporation
1510
23
ExxonMobil Upstream Research Company
2335
20
Baker Hughes Oilfield Operations, LLC
2441
20
Aramco Services Company
4162
18
Baker Hughes Holdings LLC
2992
18
ConocoPhillips Company
1689
17
CARBO Ceramics Inc.
231
13
Intelligent Wellhead Systems Inc.
76
13
Autres propriétaires 614