- 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 7/136 - Underwater drilling from non-buoyant support
Patent holdings for IPC class E21B 7/136
Total number of patents in this class: 8
10-year publication summary
|
0
|
2
|
2
|
1
|
1
|
0
|
0
|
0
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Noble Drilling Services, Inc. | 17 |
2 |
| Anadarko Petroleum Corporation | 68 |
1 |
| ConocoPhillips Company | 1683 |
1 |
| Southwest Petroleum University | 478 |
1 |
| Keppel Offshore & Marine Technology Centre Pte Ltd | 59 |
1 |
| Sambo E&C Co., Ltd. | 2 |
1 |
| Noble Services Company LLC | 6 |
1 |
| Other owners | 0 |