Détention brevets de la classe E21B 47/09

Brevets de cette classe: 1723

Historique des publications depuis 10 ans

210
224
164
198
153
110
107
84
58
17
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20165
436
Schlumberger Technology Corporation
9690
122
Saudi Arabian Oil Company
11322
80
Baker Hughes Incorporated
5689
77
Schlumberger Canada Limited
6913
64
Services Petroliers Schlumberger
5426
56
Schlumberger Technology B.v.
4951
53
Schlumberger Holdings Limited
2947
31
Baker Hughes, a GE Company, LLC
2171
30
Prad Research and Development Limited
2696
28
Landmark Graphics Corporation
1526
24
Weatherford Technology Holdings, LLC
2135
24
Motive Drilling Technologies, Inc.
89
21
Baker Hughes Oilfield Operations, LLC
1885
21
ExxonMobil Upstream Research Company
2525
20
Baker Hughes Holdings LLC
3060
18
ConocoPhillips Company
1657
15
Cameron International Corporation
1305
12
CARBO Ceramics Inc.
248
12
Intelligent Wellhead Systems Inc.
77
12
Autres propriétaires 567