- 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 47/022 - 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: 1116
10-year publication summary
|
87
|
130
|
101
|
157
|
65
|
68
|
43
|
50
|
33
|
12
|
| 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 |
311 |
| Schlumberger Technology Corporation | 9690 |
98 |
| Schlumberger Canada Limited | 6913 |
50 |
| Services Petroliers Schlumberger | 5426 |
42 |
| Schlumberger Technology B.v. | 4951 |
40 |
| Baker Hughes Incorporated | 5689 |
32 |
| Prad Research and Development Limited | 2696 |
30 |
| Saudi Arabian Oil Company | 11322 |
30 |
| Schlumberger Holdings Limited | 2947 |
29 |
| Gyrodata, Incorporated | 99 |
24 |
| Scientific Drilling International, Inc. | 161 |
22 |
| Nabors Drilling Technologies USA, Inc. | 533 |
18 |
| Merlin Technology, Inc. | 165 |
17 |
| Motive Drilling Technologies, Inc. | 89 |
17 |
| Baker Hughes, a GE Company, LLC | 2171 |
13 |
| Landmark Graphics Corporation | 1526 |
12 |
| Bench Tree Group, LLC | 63 |
9 |
| ConocoPhillips Company | 1657 |
9 |
| Magnetic Variation Services, LLC | 34 |
9 |
| The Charles Machine Works, Inc. | 411 |
8 |
| Other owners | 296 |