- 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 47/103 - Locating fluid leaks, intrusions or movements using thermal measurements
Patent holdings for IPC class E21B 47/103
Total number of patents in this class: 81
10-year publication summary
|
3
|
2
|
4
|
10
|
11
|
7
|
4
|
8
|
8
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 12911 |
11 |
| Halliburton Energy Services, Inc. | 20788 |
8 |
| Schlumberger Technology Corporation | 10652 |
7 |
| Lytt Limited | 50 |
5 |
| ExxonMobil Upstream Research Company | 2408 |
4 |
| Schlumberger Canada Limited | 7266 |
3 |
| Schlumberger Technology B.v. | 5160 |
2 |
| Baker Hughes Incorporated | 5279 |
2 |
| Chevron U.S.A. Inc. | 3939 |
2 |
| Aramco Services Company | 3927 |
2 |
| OptaSense Holdings Limited | 194 |
2 |
| Services Petroliers Schlumberger | 5771 |
2 |
| Baker Hughes Oilfield Operations, LLC | 2283 |
2 |
| Ventbuster Holdings Inc. | 10 |
2 |
| Tgt Oil Well Equipment Factory - sole Proprietorship L.L.C. | 8 |
2 |
| Schlumberger Norge AS | 73 |
1 |
| Schlumberger Holdings Limited | 2839 |
1 |
| China National Petroleum Corporation | 430 |
1 |
| CNPC USA Corp. | 155 |
1 |
| Hifi Engineering Inc. | 130 |
1 |
| Other owners | 20 |