- 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 7/132 - Underwater drilling from underwater buoyant support
Patent holdings for IPC class E21B 7/132
Total number of patents in this class: 25
10-year publication summary
|
3
|
2
|
1
|
0
|
2
|
1
|
1
|
1
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Single Buoy Moorings Inc. | 318 |
3 |
| Rigtec Wellservice AS | 3 |
3 |
| Cameron International Corporation | 1323 |
2 |
| Halliburton Energy Services, Inc. | 20672 |
1 |
| BP Corporation North America Inc. | 745 |
1 |
| ConocoPhillips Company | 1668 |
1 |
| Helix Energy Solutions Group, Inc. | 28 |
1 |
| InterMoor, Inc. | 23 |
1 |
| Japan Agency for Marine-Earth Science and Technology | 174 |
1 |
| Neodrill AS | 39 |
1 |
| Oceaneering International, Inc. | 425 |
1 |
| Other Lab, LLC | 72 |
1 |
| Prad Research and Development Limited | 2695 |
1 |
| T & T Engineering Services, Inc. | 24 |
1 |
| Toyo Engineering Corporation | 144 |
1 |
| NuStar Technologies Pte Ltd | 7 |
1 |
| China Railway Hi-tech Industry Corporation Limited | 15 |
1 |
| Ocean Technologies Limited | 3 |
1 |
| China Railway Jiujiang Bridge Engineering Co., Ltd. | 12 |
1 |
| Bauer Offshore Technologies GmbH | 10 |
1 |
| Other owners | 0 |