- 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: 134
10-year publication summary
|
13
|
13
|
17
|
9
|
15
|
3
|
4
|
7
|
6
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 14275 |
11 |
| Cameron International Corporation | 1370 |
6 |
| OneSubsea IP UK Limited | 439 |
6 |
| Statoil Petroleum AS | 469 |
6 |
| Aker Subsea AS | 126 |
5 |
| Equinor Energy AS | 498 |
5 |
| FMC Kongsberg Subsea AS | 170 |
4 |
| Schlumberger Technology Corporation | 11839 |
3 |
| Schlumberger Canada Limited | 7609 |
3 |
| Siemens AG | 24011 |
3 |
| ConocoPhillips Company | 1711 |
3 |
| Fluor Technologies Corporation | 360 |
3 |
| FMC Technologies, Inc. | 616 |
3 |
| Interwell Norway AS | 74 |
3 |
| Neodrill AS | 40 |
3 |
| Baker Hughes, a GE Company, LLC | 2051 |
3 |
| Schlumberger Technology B.v. | 5295 |
2 |
| Aker Solutions AS | 175 |
2 |
| Aramco Services Company | 4194 |
2 |
| Capwell AS | 3 |
2 |
| Other owners | 56 |