Détention brevets de la classe E21B 47/092

Brevets de cette classe: 264

Historique des publications depuis 10 ans

6
9
19
19
36
39
30
21
17
0
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20438
79
Schlumberger Technology Corporation
10263
15
Saudi Arabian Oil Company
12446
12
Intelligent Wellhead Systems Inc.
81
10
The Charles Machine Works, Inc.
415
8
Hunting Titan, Inc.
247
8
Advanced Upstream Ltd.
40
8
Baker Hughes Incorporated
5504
7
Weatherford Technology Holdings, LLC
2109
7
CARBO Ceramics Inc.
245
6
Baker Hughes Oilfield Operations, LLC
2128
6
Schlumberger Canada Limited
7154
5
Schlumberger Technology B.v.
5075
5
Services Petroliers Schlumberger
5633
5
Schlumberger Holdings Limited
2867
4
Prad Research and Development Limited
2696
4
Scientific Drilling International, Inc.
163
4
Aramco Services Company
3750
3
Cameron International Corporation
1323
3
Magnetic Variation Services, LLC
37
3
Autres propriétaires 62