- 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 31/08 - Fishing for or freeing objects in boreholes or wells using junk baskets or the like
Patent holdings for IPC class E21B 31/08
Total number of patents in this class: 53
10-year publication summary
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0
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0
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2
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0
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0
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1
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2
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5
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2
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3
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Baker Hughes Incorporated | 4903 |
15 |
| Baker Hughes Holdings LLC | 3015 |
11 |
| Saudi Arabian Oil Company | 14329 |
7 |
| Halliburton Energy Services, Inc. | 21296 |
4 |
| Thru Tubing Solutions, Inc. | 405 |
3 |
| Bisn Tec Ltd | 84 |
2 |
| Schlumberger Technology Corporation | 11893 |
1 |
| Aramco Services Company | 4192 |
1 |
| e Holstad Holding AS | 13 |
1 |
| M-I Drilling Fluids UK Limited | 89 |
1 |
| M-I L.L.C. | 737 |
1 |
| Odfjell Well Services Norway AS | 19 |
1 |
| Altus Intervention (technologies) AS | 53 |
1 |
| Wellbore Integrity Solutions LLC | 108 |
1 |
| Wildcat Oil Tool, LLC | 1 |
1 |
| Vertice Oil Tools Inc. | 96 |
1 |
| National Petroleum Technology Company | 1 |
1 |
| Other owners | 0 |