Détention brevets de la classe E21B 47/092

Brevets de cette classe: 271

Historique des publications depuis 10 ans

6
9
19
19
36
41
31
22
17
4
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20749
82
Schlumberger Technology Corporation
10627
15
Saudi Arabian Oil Company
12858
12
Intelligent Wellhead Systems Inc.
82
10
Advanced Upstream Ltd.
40
10
The Charles Machine Works, Inc.
409
8
Hunting Titan, Inc.
245
8
Baker Hughes Incorporated
5289
7
Baker Hughes Oilfield Operations, LLC
2269
7
CARBO Ceramics Inc.
237
6
Schlumberger Canada Limited
7235
5
Schlumberger Technology B.v.
5148
5
Weatherford Technology Holdings, LLC
2014
5
Services Petroliers Schlumberger
5756
5
Schlumberger Holdings Limited
2841
4
Aramco Services Company
3910
4
Prad Research and Development Limited
2694
4
Scientific Drilling International, Inc.
167
4
Cameron International Corporation
1329
3
Magnetic Variation Services, LLC
37
3
Autres propriétaires 64