- 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 41/06 - Work chambers for underwater operations, e.g. temporarily connected to well heads
Patent holdings for IPC class E21B 41/06
Total number of patents in this class: 16
10-year publication summary
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0
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2
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1
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2
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0
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3
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0
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1
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0
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0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Seabed Rig AS | 14 |
3 |
| Capwell AS | 3 |
2 |
| ConocoPhillips Company | 1675 |
2 |
| Noble Drilling Services, Inc. | 17 |
2 |
| American Augers, Inc. | 2 |
1 |
| FMC Technologies, Inc. | 599 |
1 |
| King Fahd University of Petroleum and Minerals | 1160 |
1 |
| Oilfield Technology Group AS | 1 |
1 |
| Petroleo Brasileiro S.A. - Petrobras | 836 |
1 |
| Aisus Offshore Limited | 2 |
1 |
| Equinor Energy AS | 491 |
1 |
| Other owners | 0 |