- 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 41/10 - Guide posts, e.g. releasableAttaching guide lines to underwater guide bases
Patent holdings for IPC class E21B 41/10
Total number of patents in this class: 68
10-year publication summary
|
7
|
2
|
6
|
7
|
5
|
6
|
7
|
4
|
0
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Equinor Energy AS | 492 |
11 |
| Aker Subsea AS | 130 |
4 |
| Single Buoy Moorings Inc. | 319 |
4 |
| Balltec Limited | 30 |
3 |
| Halliburton Energy Services, Inc. | 20871 |
2 |
| FMC Kongsberg Subsea AS | 187 |
2 |
| Itrec B.V. | 503 |
2 |
| Neodrill AS | 40 |
2 |
| Trendsetter Vulcan Offshore, Inc. | 55 |
2 |
| EnPro Subsea Limited | 33 |
2 |
| TLA Subsea Ltd | 5 |
2 |
| Schlumberger Technology Corporation | 10691 |
1 |
| Schlumberger Canada Limited | 7290 |
1 |
| Schlumberger Technology B.v. | 5166 |
1 |
| Schlumberger Holdings Limited | 2833 |
1 |
| Landmark Graphics Corporation | 1526 |
1 |
| Shell Internationale Research Maatschappij B.V. | 3551 |
1 |
| Shell Oil Company | 2141 |
1 |
| Chevron U.S.A. Inc. | 3951 |
1 |
| Aker Solutions AS | 240 |
1 |
| Other owners | 23 |