- 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: 1151
10-year publication summary
|
130
|
101
|
157
|
63
|
68
|
44
|
53
|
35
|
36
|
27
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20901 |
313 |
| Schlumberger Technology Corporation | 10727 |
103 |
| Schlumberger Canada Limited | 7296 |
52 |
| Services Petroliers Schlumberger | 5787 |
45 |
| Schlumberger Technology B.v. | 5165 |
42 |
| Saudi Arabian Oil Company | 13185 |
38 |
| Baker Hughes Incorporated | 5241 |
30 |
| Prad Research and Development Limited | 2693 |
30 |
| Schlumberger Holdings Limited | 2822 |
29 |
| Gyrodata, Incorporated | 87 |
22 |
| Scientific Drilling International, Inc. | 168 |
22 |
| Motive Drilling Technologies, Inc. | 103 |
19 |
| Nabors Drilling Technologies USA, Inc. | 556 |
17 |
| Merlin Technology, Inc. | 161 |
14 |
| Landmark Graphics Corporation | 1523 |
13 |
| Baker Hughes, a GE Company, LLC | 2112 |
13 |
| Magnetic Variation Services, LLC | 38 |
10 |
| Bench Tree Group, LLC | 66 |
9 |
| ConocoPhillips Company | 1673 |
9 |
| Institute of Geology and Geophysics, Chinese Academy of Sciences | 326 |
9 |
| Other owners | 312 |