Détention brevets de la classe E21B 47/085

Brevets de cette classe: 176

Historique des publications depuis 10 ans

5
2
6
19
14
28
26
13
16
1
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20438
51
Schlumberger Technology Corporation
10263
14
Saudi Arabian Oil Company
12446
13
Darkvision Technologies Inc.
73
7
Schlumberger Canada Limited
7154
5
Services Petroliers Schlumberger
5633
5
Schlumberger Technology B.v.
5075
4
Aramco Services Company
3750
4
Prad Research and Development Limited
2696
4
Schlumberger Holdings Limited
2867
3
Baker Hughes Incorporated
5504
3
ConocoPhillips Company
1679
3
GE Energy Oilfield Technology, Inc.
20
3
Pipelines 2 Data (p2d) Limited
17
3
Baker Hughes Oilfield Operations, LLC
2128
3
WWT International Coiled Tubing Services, LLC
3
3
CARBO Ceramics Inc.
245
2
China Petroleum & Chemical Corporation
1783
2
Pile Dynamics, Inc.
24
2
Proforma Engineering Limited
4
2
Autres propriétaires 40