- 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 33/136 - Baskets, e.g. of umbrella type
Patent holdings for IPC class E21B 33/136
Total number of patents in this class: 33
10-year publication summary
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1
|
2
|
3
|
1
|
4
|
1
|
1
|
2
|
1
|
0
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Bisn Tec Ltd | 82 |
9 |
| Saudi Arabian Oil Company | 13940 |
6 |
| Halliburton Energy Services, Inc. | 21161 |
5 |
| Perigon AS | 5 |
3 |
| Weatherford Technology Holdings, LLC | 2033 |
2 |
| Isol8 (Holdings) Limited | 27 |
2 |
| Schlumberger Technology Corporation | 11449 |
1 |
| Aramco Services Company | 4172 |
1 |
| Checkpoint A-b-c GmbH | 1 |
1 |
| Petrowell Limited | 40 |
1 |
| Abu Dhabi Company for Offshore Petroleum Operations Limited | 3 |
1 |
| Weatherford Technology Holdings, LLC | 36 |
1 |
| Other owners | 0 |