- 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 34/04 - Valve arrangements for boreholes or wells in well heads in underwater well heads
Patent holdings for IPC class E21B 34/04
Total number of patents in this class: 615
10-year publication summary
|
55
|
55
|
44
|
45
|
46
|
21
|
31
|
23
|
19
|
13
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| OneSubsea IP UK Limited | 439 |
63 |
| Cameron International Corporation | 1365 |
44 |
| FMC Technologies, Inc. | 617 |
31 |
| Schlumberger Technology Corporation | 11857 |
25 |
| Halliburton Energy Services, Inc. | 21318 |
25 |
| Expro North Sea Limited | 231 |
23 |
| S+s Industries Technology LLC | 24 |
19 |
| TechnipFMC Norge AS | 126 |
15 |
| Baker Hughes Energy Technology UK Limited | 272 |
14 |
| Schlumberger Canada Limited | 7613 |
11 |
| ConocoPhillips Company | 1711 |
10 |
| Interventek Subsea Engineering Limited | 19 |
10 |
| OneSubsea AS | 88 |
10 |
| Schlumberger Technology B.v. | 5297 |
9 |
| Services Petroliers Schlumberger | 6029 |
9 |
| Trendsetter Engineering, Inc. | 51 |
9 |
| FMC Kongsberg Subsea AS | 170 |
8 |
| Cameron Technologies Limited | 234 |
8 |
| Innovex International, Inc | 128 |
7 |
| Robert Bosch GmbH | 44238 |
6 |
| Other owners | 259 |