- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining 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: 117
10-year publication summary
|
8
|
18
|
13
|
13
|
17
|
9
|
14
|
3
|
4
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 11322 |
9 |
| Statoil Petroleum AS | 555 |
6 |
| Aker Subsea AS | 130 |
5 |
| Cameron International Corporation | 1305 |
5 |
| FMC Kongsberg Subsea AS | 251 |
5 |
| OneSubsea IP UK Limited | 378 |
5 |
| Equinor Energy AS | 475 |
5 |
| Schlumberger Technology Corporation | 9690 |
3 |
| Siemens AG | 24990 |
3 |
| Aker Solutions AS | 226 |
3 |
| ConocoPhillips Company | 1657 |
3 |
| Fluor Technologies Corporation | 410 |
3 |
| FMC Technologies, Inc. | 603 |
3 |
| Neodrill AS | 39 |
3 |
| Baker Hughes, a GE Company, LLC | 2171 |
3 |
| Schlumberger Canada Limited | 6913 |
2 |
| Schlumberger Technology B.v. | 4951 |
2 |
| Capwell AS | 3 |
2 |
| Interwell Norway AS | 48 |
2 |
| Saipem S.A. | 223 |
2 |
| Other owners | 43 |