- 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 47/24 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid by positive mud pulses using a flow restricting valve within the drill pipe
Patent holdings for IPC class E21B 47/24
Total number of patents in this class: 65
10-year publication summary
|
6
|
2
|
2
|
4
|
8
|
4
|
7
|
13
|
3
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Evolution Engineering Inc. | 301 |
12 |
| Halliburton Energy Services, Inc. | 20788 |
6 |
| Sanvean Technologies LLC | 38 |
5 |
| Schlumberger Technology Corporation | 10652 |
4 |
| Bench Tree Group, LLC | 66 |
4 |
| China Petroleum & Chemical Corporation | 1881 |
3 |
| Rime Downhole Technologies, LLC | 27 |
3 |
| Baker Hughes Oilfield Operations, LLC | 2283 |
3 |
| Gtherm Energy, Inc. | 15 |
2 |
| Vertex Downhole Technologies Inc. | 3 |
2 |
| Schlumberger Canada Limited | 7266 |
1 |
| The Charles Machine Works, Inc. | 406 |
1 |
| China University of Geosciences, Beijing | 73 |
1 |
| China University of Petroleum (East China) | 370 |
1 |
| Colorado School of Mines | 179 |
1 |
| Drilformance Technologies, LLC | 15 |
1 |
| ENI S.p.A. | 1257 |
1 |
| Institute of Geology and Geophysics, Chinese Academy of Sciences | 324 |
1 |
| Japan Agency for Marine-Earth Science and Technology | 173 |
1 |
| National Oilwell Varco, L.P. | 1661 |
1 |
| Other owners | 11 |