- 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: 334
10-year publication summary
|
27
|
23
|
23
|
20
|
15
|
21
|
28
|
13
|
17
|
10
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Innovex International, Inc | 128 |
30 |
| Cameron International Corporation | 1368 |
28 |
| OneSubsea IP UK Limited | 440 |
28 |
| FMC Technologies, Inc. | 617 |
27 |
| Baker Hughes Energy Technology UK Limited | 279 |
14 |
| Halliburton Energy Services, Inc. | 21296 |
12 |
| OneSubsea AS | 88 |
12 |
| Baker Hughes Oilfield Operations, LLC | 2551 |
11 |
| Equinor Energy AS | 498 |
10 |
| Aker Solutions AS | 174 |
9 |
| Vetco Gray Inc. | 137 |
8 |
| Neodrill AS | 40 |
6 |
| Plexus Holdings plc | 35 |
6 |
| Aker Subsea Limited | 28 |
5 |
| Vetco Gray, LLC | 146 |
5 |
| CCB Subsea AS | 8 |
5 |
| Chevron U.S.A. Inc. | 4162 |
4 |
| Enovate Systems Limited | 42 |
4 |
| Vetco Gray Scandinavia AS | 164 |
4 |
| Schlumberger Technology Corporation | 11893 |
3 |
| Other owners | 103 |