- 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 7/26 - Drilling without earth removal, e.g. with self-propelled burrowing devices
Patent holdings for IPC class E21B 7/26
Total number of patents in this class: 85
10-year publication summary
|
3
|
11
|
5
|
6
|
3
|
2
|
8
|
8
|
11
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| The Charles Machine Works, Inc. | 404 |
8 |
| Tracto-Technik GmbH & Co. KG | 170 |
5 |
| GE Infrastructure Technology, LLC | 6248 |
5 |
| Underground Magnetics, Inc. | 37 |
4 |
| Halliburton Energy Services, Inc. | 20946 |
3 |
| The Regents of the University of California | 20087 |
3 |
| Herrenknecht AG | 203 |
3 |
| Saudi Arabian Oil Company | 13372 |
3 |
| British Telecommunications Public Limited Company | 2638 |
2 |
| Geo-mole Limited | 4 |
2 |
| Groundlinx Technologies, LLC | 3 |
2 |
| SIP & T s.p.a. | 6 |
2 |
| Spiderplow Rohr- & Kabelpflug GmbH | 2 |
2 |
| Brice, Mark | 2 |
2 |
| Schlumberger Technology Corporation | 10881 |
1 |
| Schlumberger Canada Limited | 7366 |
1 |
| Schlumberger Technology B.v. | 5183 |
1 |
| Schlumberger Holdings Limited | 2803 |
1 |
| The United States of America as represented by the Secretary of the Navy | 2776 |
1 |
| Georgia Tech Research Corporation | 2762 |
1 |
| Other owners | 33 |