- 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 33/037 - Protective housings therefor
Patent holdings for IPC class E21B 33/037
Total number of patents in this class: 130
10-year publication summary
|
13
|
13
|
16
|
8
|
14
|
2
|
4
|
7
|
4
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13886 |
10 |
| Cameron International Corporation | 1357 |
6 |
| OneSubsea IP UK Limited | 431 |
6 |
| Statoil Petroleum AS | 492 |
6 |
| Aker Subsea AS | 126 |
5 |
| FMC Kongsberg Subsea AS | 188 |
5 |
| Equinor Energy AS | 498 |
5 |
| Schlumberger Technology Corporation | 11326 |
3 |
| Schlumberger Canada Limited | 7511 |
3 |
| Siemens AG | 24337 |
3 |
| ConocoPhillips Company | 1699 |
3 |
| Fluor Technologies Corporation | 370 |
3 |
| FMC Technologies, Inc. | 602 |
3 |
| Interwell Norway AS | 69 |
3 |
| Neodrill AS | 40 |
3 |
| Baker Hughes, a GE Company, LLC | 2105 |
3 |
| Schlumberger Technology B.v. | 5257 |
2 |
| Aker Solutions AS | 176 |
2 |
| Aramco Services Company | 4157 |
2 |
| Capwell AS | 3 |
2 |
| Other owners | 52 |