- 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 47/125 - 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 earth as an electrical conductor
Patent holdings for IPC class E21B 47/125
Total number of patents in this class: 189
10-year publication summary
|
8
|
1
|
3
|
1
|
5
|
4
|
41
|
24
|
17
|
9
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
59 |
| Schlumberger Technology Corporation | 9690 |
20 |
| Schlumberger Canada Limited | 6913 |
19 |
| Schlumberger Technology B.v. | 4951 |
18 |
| Services Petroliers Schlumberger | 5426 |
18 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
16 |
| Expro North Sea Limited | 215 |
6 |
| Baker Hughes Incorporated | 5689 |
4 |
| Merlin Technology, Inc. | 165 |
4 |
| Schlumberger Holdings Limited | 2947 |
2 |
| Prad Research and Development Limited | 2696 |
2 |
| Saudi Arabian Oil Company | 11322 |
2 |
| Baker Hughes Holdings LLC | 3060 |
2 |
| Landmark Graphics Corporation | 1526 |
1 |
| Aramco Services Company | 3504 |
1 |
| China Petroleum & Chemical Corporation | 1623 |
1 |
| CMTE Development Limited | 43 |
1 |
| ConocoPhillips Company | 1657 |
1 |
| Detnet South Africa (Pty) Ltd | 236 |
1 |
| Evolution Engineering Inc. | 313 |
1 |
| Other owners | 10 |