- 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 31/06 - Fishing for or freeing objects in boreholes or wells using magnetic means
Patent holdings for IPC class E21B 31/06
Total number of patents in this class: 129
10-year publication summary
|
11
|
3
|
8
|
9
|
5
|
16
|
13
|
5
|
9
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 12446 |
15 |
| Halliburton Energy Services, Inc. | 20438 |
13 |
| Baker Hughes Incorporated | 5504 |
9 |
| Odfjell Well Services Norway AS | 20 |
7 |
| Schlumberger Technology Corporation | 10263 |
6 |
| Weatherford Technology Holdings, LLC | 2109 |
6 |
| Aramco Services Company | 3750 |
5 |
| Baker Hughes, a GE Company, LLC | 2138 |
4 |
| Baker Hughes Holdings LLC | 3009 |
4 |
| Schlumberger Canada Limited | 7154 |
3 |
| Schlumberger Technology B.v. | 5075 |
3 |
| M-I Drilling Fluids UK Limited | 89 |
3 |
| Robertson Intellectual Properties, LLC | 89 |
3 |
| Services Petroliers Schlumberger | 5633 |
3 |
| Sub-Drill Supply Limited | 12 |
3 |
| Downhole Rental Tools, LLC | 14 |
3 |
| Schlumberger Oilfield UK Limited | 55 |
3 |
| Impact Selector International, LLC | 117 |
2 |
| Lee Oilfield Service Ltd. | 13 |
2 |
| Lone Star Magnetics, LLC | 2 |
2 |
| Other owners | 30 |