Détention brevets de la classe E21B 47/26

Brevets de cette classe: 566

Historique des publications depuis 10 ans

13
34
33
26
10
17
29
33
89
62
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
19698
104
Schlumberger Technology Corporation
9122
61
Schlumberger Canada Limited
6508
60
Services Petroliers Schlumberger
5108
59
Schlumberger Technology B.v.
4723
36
Landmark Graphics Corporation
1553
30
Geoquest Systems B.V.
438
21
Saudi Arabian Oil Company
9246
18
Baker Hughes Incorporated
7202
17
Prad Research and Development Limited
2697
15
Schlumberger Holdings Limited
3098
14
Baker Hughes Oilfield Operations, LLC
1208
12
Weatherford Technology Holdings, LLC
2542
6
Sanvean Technologies LLC
35
6
Evolution Engineering Inc.
318
5
ExxonMobil Upstream Research Company
2855
4
Aramco Services Company
3136
3
Hifi Engineering Inc.
108
3
Reflex Instruments Asia Pacific Pty Ltd
68
3
Baker Hughes, a GE Company, LLC
3077
3
Autres propriétaires 86