- 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 47/0228 - Determining slope or direction of the borehole, e.g. using geomagnetism using electromagnetic energy or detectors therefor
Patent holdings for IPC class E21B 47/0228
Total number of patents in this class: 232
10-year publication summary
|
7
|
12
|
15
|
12
|
13
|
24
|
36
|
30
|
14
|
6
|
| 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 |
93 |
| Schlumberger Canada Limited | 6913 |
12 |
| Schlumberger Technology Corporation | 9690 |
10 |
| Services Petroliers Schlumberger | 5426 |
9 |
| Schlumberger Technology B.v. | 4951 |
8 |
| Merlin Technology, Inc. | 165 |
6 |
| Prad Research and Development Limited | 2696 |
6 |
| Saudi Arabian Oil Company | 11322 |
6 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
6 |
| Schlumberger Holdings Limited | 2947 |
5 |
| Baker Hughes Incorporated | 5689 |
5 |
| Applied Technologies Associates, Inc. | 12 |
5 |
| ConocoPhillips Company | 1657 |
4 |
| Hunting Titan, Inc. | 240 |
3 |
| Magnetic Variation Services, LLC | 34 |
3 |
| Scientific Drilling International, Inc. | 161 |
3 |
| Vector Magnetics, LLC | 15 |
3 |
| U-target Energy Ltd. | 6 |
3 |
| Weatherford Technology Holdings, LLC | 2135 |
2 |
| Bench Tree Group, LLC | 63 |
2 |
| Other owners | 38 |