Détention brevets de la classe E21B 47/0228

Brevets de cette classe: 232

Historique des publications depuis 10 ans

7
12
15
12
13
24
36
30
14
6
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20165
93
Schlumberger Canada Limited
6913
12
Schlumberger Technology Corporation
9690
10
Services Petroliers Schlumberger
5426
9
Schlumberger Technology B.v.
4951
8
Merlin Technology, Inc.
165
6
Prad Research and Development Limited
2696
6
Saudi Arabian Oil Company
11322
6
Baker Hughes Oilfield Operations, LLC
1885
6
Schlumberger Holdings Limited
2947
5
Baker Hughes Incorporated
5689
5
Applied Technologies Associates, Inc.
12
5
ConocoPhillips Company
1657
4
Hunting Titan, Inc.
240
3
Magnetic Variation Services, LLC
34
3
Scientific Drilling International, Inc.
161
3
Vector Magnetics, LLC
15
3
U-target Energy Ltd.
6
3
Weatherford Technology Holdings, LLC
2135
2
Bench Tree Group, LLC
63
2
Autres propriétaires 38