Détention brevets de la classe E21B 47/09

Brevets de cette classe: 1784

Historique des publications depuis 10 ans

224
162
197
152
110
113
86
64
57
35
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20901
441
Schlumberger Technology Corporation
10727
126
Saudi Arabian Oil Company
13185
94
Baker Hughes Incorporated
5241
75
Schlumberger Canada Limited
7296
64
Services Petroliers Schlumberger
5787
56
Schlumberger Technology B.v.
5165
52
Schlumberger Holdings Limited
2822
30
Baker Hughes, a GE Company, LLC
2112
30
Motive Drilling Technologies, Inc.
103
29
Prad Research and Development Limited
2693
28
Landmark Graphics Corporation
1523
24
Weatherford Technology Holdings, LLC
2023
24
ExxonMobil Upstream Research Company
2397
20
Baker Hughes Oilfield Operations, LLC
2305
20
Baker Hughes Holdings LLC
3006
18
Aramco Services Company
3976
17
ConocoPhillips Company
1673
16
CARBO Ceramics Inc.
235
13
Intelligent Wellhead Systems Inc.
79
13
Autres propriétaires 594