- 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 43/36 - Underwater separating arrangements
Patent holdings for IPC class E21B 43/36
Total number of patents in this class: 340
10-year publication summary
|
51
|
33
|
42
|
24
|
33
|
14
|
12
|
13
|
10
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Equinor Energy AS | 491 |
26 |
| Statoil Petroleum AS | 517 |
20 |
| ExxonMobil Upstream Research Company | 2407 |
16 |
| Subsea 7 Norway AS | 88 |
13 |
| FMC Kongsberg Subsea AS | 252 |
11 |
| OneSubsea IP UK Limited | 419 |
11 |
| Aker Solutions AS | 240 |
10 |
| Saipem S.A. | 228 |
10 |
| Saudi Arabian Oil Company | 12947 |
10 |
| General Electric Company | 13829 |
9 |
| Shell Internationale Research Maatschappij B.V. | 3551 |
9 |
| FMC Technologies do Brasil Ltda. | 66 |
9 |
| Cameron International Corporation | 1332 |
7 |
| Petroleo Brasileiro S.A. - Petrobras | 841 |
6 |
| Vetco Gray Scandinavia AS | 172 |
6 |
| Halliburton Energy Services, Inc. | 20835 |
5 |
| Chevron U.S.A. Inc. | 3947 |
5 |
| ENI S.p.A. | 1258 |
5 |
| Seabed Separation AS | 17 |
5 |
| Trevelyan Trading Ltd | 4 |
4 |
| Other owners | 143 |