- 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 7/15 - Drilling by use of heat, e.g. flame drilling of electrically generated heat
Patent holdings for IPC class E21B 7/15
Total number of patents in this class: 372
10-year publication summary
|
18
|
17
|
31
|
24
|
28
|
36
|
32
|
33
|
37
|
0
|
| 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 |
82 |
| Saudi Arabian Oil Company | 11322 |
52 |
| SDG, LLC | 62 |
41 |
| Chevron U.S.A. Inc. | 3774 |
37 |
| Foro Energy, Inc. | 104 |
32 |
| Aramco Services Company | 3504 |
7 |
| Schlumberger Technology Corporation | 9690 |
4 |
| The Tetra Corporation | 25 |
4 |
| Arcbyt, Inc. | 25 |
4 |
| EarthGrid PBC | 21 |
4 |
| Schlumberger Canada Limited | 6913 |
3 |
| Schlumberger Technology B.v. | 4951 |
3 |
| Schlumberger Holdings Limited | 2947 |
3 |
| China University of Petroleum (East China) | 319 |
3 |
| Ramax, LLC | 4 |
3 |
| Services Petroliers Schlumberger | 5426 |
3 |
| The Texas a & M University System | 1519 |
3 |
| Stone Aerospace, Inc. | 27 |
3 |
| Baker Hughes, a GE Company, LLC | 2171 |
3 |
| Ptrm Pty Ltd | 3 |
3 |
| Other owners | 75 |