- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 6/06 - Drives for drilling with combined rotary and percussive action the rotation being intermittent, e.g. obtained by a ratchet device
Patent holdings for IPC class E21B 6/06
Total number of patents in this class: 13
10-year publication summary
|
0
|
3
|
2
|
1
|
2
|
1
|
0
|
0
|
2
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| CT Energy Ltd. | 7 |
2 |
| National Oilwell Varco, L.P. | 1627 |
2 |
| Halliburton Energy Services, Inc. | 20438 |
1 |
| China University of Petroleum (East China) | 347 |
1 |
| Southwest Petroleum University | 443 |
1 |
| Ulterra Drilling Technologies, L.P. | 127 |
1 |
| Baker Hughes Oilfield Operations, LLC | 2128 |
1 |
| Mcmillan, Jaron Lyell | 6 |
1 |
| Swinford, Jason L. | 5 |
1 |
| Sichuan Xieming Technology Co., Ltd. | 5 |
1 |
| Nantong Xieming Technology Co., Ltd. | 2 |
1 |
| Other owners | 0 |