- 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 47/0224 - 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: 98
10-year publication summary
|
10
|
1
|
5
|
5
|
5
|
11
|
16
|
8
|
10
|
4
|
| 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 |
22 |
| Schlumberger Technology Corporation | 9690 |
8 |
| Saudi Arabian Oil Company | 11322 |
8 |
| Baker Hughes Incorporated | 5689 |
5 |
| Schlumberger Canada Limited | 6913 |
4 |
| Schlumberger Technology B.v. | 4951 |
4 |
| Landmark Graphics Corporation | 1526 |
4 |
| Services Petroliers Schlumberger | 5426 |
4 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
4 |
| Silixa Ltd. | 95 |
3 |
| Equinor Energy AS | 475 |
3 |
| Schlumberger Holdings Limited | 2947 |
2 |
| Aramco Services Company | 3504 |
2 |
| Iluka Resources Limited | 32 |
2 |
| Institute of Geology and Geophysics, Chinese Academy of Sciences | 276 |
2 |
| Prad Research and Development Limited | 2696 |
2 |
| Baker Hughes, a GE Company, LLC | 2171 |
2 |
| The Regents of the University of California | 18943 |
1 |
| Chevron U.S.A. Inc. | 3774 |
1 |
| ConocoPhillips Company | 1657 |
1 |
| Other owners | 14 |