- 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: 125
10-year publication summary
18
|
13
|
13
|
17
|
9
|
15
|
3
|
4
|
7
|
0
|
2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Saudi Arabian Oil Company | 12423 |
9 |
Cameron International Corporation | 1322 |
6 |
Statoil Petroleum AS | 541 |
6 |
Aker Subsea AS | 130 |
5 |
FMC Kongsberg Subsea AS | 251 |
5 |
OneSubsea IP UK Limited | 399 |
5 |
Equinor Energy AS | 488 |
5 |
Schlumberger Technology Corporation | 10241 |
3 |
Schlumberger Canada Limited | 7147 |
3 |
Siemens AG | 24573 |
3 |
Aker Solutions AS | 234 |
3 |
ConocoPhillips Company | 1677 |
3 |
Fluor Technologies Corporation | 385 |
3 |
FMC Technologies, Inc. | 586 |
3 |
Interwell Norway AS | 58 |
3 |
Neodrill AS | 39 |
3 |
Baker Hughes, a GE Company, LLC | 2138 |
3 |
Schlumberger Technology B.v. | 5068 |
2 |
Capwell AS | 3 |
2 |
Saipem S.A. | 227 |
2 |
Other owners | 48 |