- All sections
- E - Fixed constructions
- E21B - Earth or rock drillingobtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 41/04 - Manipulators for underwater operations, e.g. temporarily connected to well heads
Patent holdings for IPC class E21B 41/04
Total number of patents in this class: 285
10-year publication summary
|
22
|
28
|
30
|
27
|
20
|
15
|
7
|
15
|
17
|
9
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| OneSubsea IP UK Limited | 439 |
18 |
| Saudi Arabian Oil Company | 14248 |
15 |
| FMC Technologies, Inc. | 616 |
13 |
| Oceaneering International, Inc. | 398 |
13 |
| Schlumberger Technology Corporation | 11820 |
8 |
| Halliburton Energy Services, Inc. | 21320 |
8 |
| Kinetic Pressure Control Limited | 91 |
7 |
| TechnipFMC Norge AS | 125 |
7 |
| Subsea 7 Limited | 238 |
6 |
| Trendsetter Vulcan Offshore, Inc. | 60 |
6 |
| Aker Solutions AS | 175 |
5 |
| BP Corporation North America Inc. | 747 |
5 |
| FMC Kongsberg Subsea AS | 170 |
5 |
| Trendsetter Engineering, Inc. | 51 |
5 |
| Baker Hughes Energy Technology UK Limited | 269 |
5 |
| Hydril USA Distribution LLC | 229 |
4 |
| National Oilwell Varco, L.P. | 1700 |
4 |
| FMC Technologies do Brasil Ltda. | 68 |
4 |
| Equinor Energy AS | 497 |
4 |
| TLA Subsea Ltd | 5 |
4 |
| Other owners | 139 |