- 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 47/0224 - Determining slope or direction of the borehole, e.g. using geomagnetism using seismic or acoustic means
Patent holdings for IPC class E21B 47/0224
Total number of patents in this class: 107
10-year publication summary
|
5
|
6
|
5
|
11
|
16
|
8
|
11
|
9
|
2
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21318 |
26 |
| Schlumberger Technology Corporation | 11857 |
11 |
| Saudi Arabian Oil Company | 14296 |
8 |
| Schlumberger Canada Limited | 7613 |
5 |
| Baker Hughes Incorporated | 4916 |
5 |
| Baker Hughes Oilfield Operations, LLC | 2539 |
5 |
| Schlumberger Technology B.v. | 5297 |
4 |
| Landmark Graphics Corporation | 1505 |
4 |
| Services Petroliers Schlumberger | 6029 |
4 |
| ConocoPhillips Company | 1711 |
3 |
| Schlumberger Holdings Limited | 2686 |
2 |
| Iluka Resources Limited | 35 |
2 |
| Institute of Geology and Geophysics, Chinese Academy of Sciences | 355 |
2 |
| Prad Research and Development Limited | 2654 |
2 |
| Silixa Ltd. | 84 |
2 |
| Baker Hughes, a GE Company, LLC | 2051 |
2 |
| Equinor Energy AS | 498 |
2 |
| The Regents of the University of California | 20802 |
1 |
| Chevron U.S.A. Inc. | 4155 |
1 |
| Aramco Services Company | 4193 |
1 |
| Other owners | 15 |