Détention brevets de la classe E21B 47/13

Brevets de cette classe: 1141

Historique des publications depuis 10 ans

67
63
51
55
87
102
164
152
92
24
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20165
263
Evolution Engineering Inc.
313
73
Schlumberger Technology Corporation
9690
70
Saudi Arabian Oil Company
11322
58
Schlumberger Canada Limited
6913
56
Services Petroliers Schlumberger
5426
46
Schlumberger Technology B.v.
4951
43
Baker Hughes Oilfield Operations, LLC
1885
34
Merlin Technology, Inc.
165
23
Metrol Technology Limited
85
22
Baker Hughes Incorporated
5689
20
Expro North Sea Limited
215
20
Erdos Miller, Inc.
35
19
Schlumberger Holdings Limited
2947
17
Weatherford Technology Holdings, LLC
2135
17
Prad Research and Development Limited
2696
17
ExxonMobil Upstream Research Company
2525
12
Black Diamond Oilfield Rentals LLC
81
12
ConocoPhillips Company
1657
9
Scientific Drilling International, Inc.
161
9
Autres propriétaires 301