- 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: 614
10-year publication summary
|
54
|
52
|
42
|
43
|
41
|
21
|
29
|
19
|
19
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| OneSubsea IP UK Limited | 429 |
61 |
| Cameron International Corporation | 1358 |
44 |
| FMC Technologies, Inc. | 605 |
32 |
| Schlumberger Technology Corporation | 11266 |
25 |
| Halliburton Energy Services, Inc. | 21107 |
25 |
| Expro North Sea Limited | 237 |
23 |
| S+s Industries Technology LLC | 24 |
19 |
| Baker Hughes Energy Technology UK Limited | 228 |
14 |
| FMC Kongsberg Subsea AS | 190 |
12 |
| TechnipFMC Norge AS | 99 |
12 |
| Schlumberger Canada Limited | 7487 |
11 |
| ConocoPhillips Company | 1699 |
10 |
| Interventek Subsea Engineering Limited | 18 |
10 |
| OneSubsea AS | 83 |
10 |
| Schlumberger Technology B.v. | 5242 |
9 |
| Services Petroliers Schlumberger | 5921 |
9 |
| Trendsetter Engineering, Inc. | 51 |
9 |
| Cameron Technologies Limited | 222 |
8 |
| Innovex International, Inc | 121 |
7 |
| National Coupling Company, Inc. | 61 |
6 |
| Other owners | 258 |