- Sections
- E - Constructions fixes
- E21B - Forage du sol ou de la rocheextraction du pétrole, du gaz, de l'eau ou de matériaux solubles ou fusibles ou d'une suspension de matières minérales à partir de puits
- E21B 29/04 - Sectionnement de câbles ou similaires
Détention brevets de la classe E21B 29/04
Brevets de cette classe: 121
Historique des publications depuis 10 ans
|
14
|
7
|
4
|
7
|
3
|
15
|
5
|
13
|
5
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Propriétaires principaux
| Proprétaire |
Total
|
Cette classe
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20908 |
9 |
| Baker Hughes Incorporated | 5238 |
7 |
| Athabasca Oil Corporation | 21 |
7 |
| Interventek Subsea Engineering Limited | 18 |
7 |
| Schlumberger Technology Corporation | 10745 |
5 |
| Cameron International Corporation | 1335 |
5 |
| Impact Selector International, LLC | 114 |
5 |
| Aker Solutions AS | 241 |
4 |
| Expro North Sea Limited | 231 |
4 |
| Baker Hughes Oilfield Operations, LLC | 2313 |
4 |
| TimeSaver Downhole Products, LLC | 4 |
4 |
| G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen | 70 |
3 |
| Saudi Arabian Oil Company | 13206 |
3 |
| Absolute Oilfield Equipment, LLC | 4 |
2 |
| ConocoPhillips Company | 1671 |
2 |
| Hydra Systems AS | 37 |
2 |
| Hydril USA Distribution LLC | 213 |
2 |
| OneSubsea IP UK Limited | 422 |
2 |
| Robertson Intellectual Properties, LLC | 92 |
2 |
| Smart Installations AS | 8 |
2 |
| Autres propriétaires | 40 |