- 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 1/28 - Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by liquid pressure working with pulses
Patent holdings for IPC class E21B 1/28
Total number of patents in this class: 25
10-year publication summary
|
5
|
0
|
1
|
0
|
2
|
4
|
4
|
3
|
0
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Atlas Copco Rock Drills AB | 144 |
4 |
| Thru Tubing Solutions, Inc. | 376 |
4 |
| Anderson, Charles Abernethy | 5 |
2 |
| Performance Pulsation Control, Inc. | 58 |
2 |
| Sandvik Mining and Construction Oy | 822 |
2 |
| Turbo Drill Industries, Inc. | 63 |
2 |
| Rival Downhole Tools LC | 39 |
2 |
| Charles Abernethy Anderson | 10 |
2 |
| Halliburton Energy Services, Inc. | 20788 |
1 |
| Daemo Engineering Co., Ltd. | 30 |
1 |
| Mincon International Limited | 53 |
1 |
| National Oilwell DHT, L.P. | 131 |
1 |
| Teledrill, Inc. | 19 |
1 |
| Other owners | 0 |