- 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 47/22 - 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 negative mud pulses using a pressure relief valve between drill pipe and annulus
Patent holdings for IPC class E21B 47/22
Total number of patents in this class: 21
10-year publication summary
|
2
|
1
|
2
|
0
|
5
|
1
|
0
|
5
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20438 |
5 |
| Anderson, Charles Abernethy | 12 |
2 |
| Bench Tree Group, LLC | 65 |
2 |
| NCS Multistage Inc. | 179 |
2 |
| Rime Downhole Technologies, LLC | 27 |
2 |
| Schlumberger Technology Corporation | 10263 |
1 |
| Gtherm Energy, Inc. | 14 |
1 |
| Gyrodata, Incorporated | 89 |
1 |
| Halliburton Manufacturing and Services Limited | 62 |
1 |
| Saudi Arabian Oil Company | 12446 |
1 |
| Yangtze University | 54 |
1 |
| Baker Hughes Oilfield Operations, LLC | 2128 |
1 |
| Blueland Energy Technology Limited | 4 |
1 |
| Other owners | 0 |