- 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 33/043 - Casing headsSuspending casings or tubings in well heads specially adapted for underwater well heads
Patent holdings for IPC class E21B 33/043
Total number of patents in this class: 332
10-year publication summary
|
25
|
22
|
22
|
20
|
15
|
20
|
25
|
13
|
17
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cameron International Corporation | 1368 |
28 |
| OneSubsea IP UK Limited | 431 |
28 |
| Innovex International, Inc | 124 |
28 |
| FMC Technologies, Inc. | 604 |
27 |
| Halliburton Energy Services, Inc. | 21194 |
12 |
| Baker Hughes Energy Technology UK Limited | 233 |
12 |
| OneSubsea AS | 83 |
12 |
| Equinor Energy AS | 494 |
11 |
| Baker Hughes Oilfield Operations, LLC | 2439 |
10 |
| Aker Solutions AS | 178 |
9 |
| Vetco Gray Inc. | 142 |
8 |
| Neodrill AS | 40 |
6 |
| Plexus Holdings plc | 35 |
6 |
| Aker Subsea Limited | 30 |
5 |
| Vetco Gray, LLC | 148 |
5 |
| CCB Subsea AS | 8 |
5 |
| Chevron U.S.A. Inc. | 4081 |
4 |
| Enovate Systems Limited | 45 |
4 |
| GE Oil & Gas UK Limited | 158 |
4 |
| Vetco Gray Scandinavia AS | 172 |
4 |
| Other owners | 104 |