- 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 47/022 - Determining slope or direction of the borehole, e.g. using geomagnetism
Patent holdings for IPC class E21B 47/022
Total number of patents in this class: 1155
10-year publication summary
|
108
|
87
|
125
|
56
|
57
|
40
|
44
|
31
|
36
|
31
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20937 |
313 |
| Schlumberger Technology Corporation | 10848 |
105 |
| Schlumberger Canada Limited | 7357 |
53 |
| Services Petroliers Schlumberger | 5823 |
45 |
| Schlumberger Technology B.v. | 5184 |
42 |
| Saudi Arabian Oil Company | 13316 |
38 |
| Baker Hughes Incorporated | 5254 |
30 |
| Prad Research and Development Limited | 2692 |
30 |
| Schlumberger Holdings Limited | 2808 |
29 |
| Gyrodata, Incorporated | 87 |
22 |
| Scientific Drilling International, Inc. | 168 |
22 |
| Motive Drilling Technologies, Inc. | 103 |
19 |
| Nabors Drilling Technologies USA, Inc. | 561 |
19 |
| Merlin Technology, Inc. | 162 |
14 |
| Landmark Graphics Corporation | 1524 |
13 |
| Baker Hughes, a GE Company, LLC | 2110 |
13 |
| Magnetic Variation Services, LLC | 38 |
10 |
| Bench Tree Group, LLC | 63 |
9 |
| ConocoPhillips Company | 1678 |
9 |
| Institute of Geology and Geophysics, Chinese Academy of Sciences | 326 |
9 |
| Other owners | 311 |