- 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: 92
10-year publication summary
|
1
|
3
|
9
|
11
|
6
|
4
|
8
|
8
|
8
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13708 |
12 |
| Schlumberger Technology Corporation | 11129 |
8 |
| Halliburton Energy Services, Inc. | 21122 |
8 |
| Lytt Limited | 51 |
5 |
| Schlumberger Canada Limited | 7460 |
4 |
| Chevron U.S.A. Inc. | 4013 |
4 |
| ExxonMobil Upstream Research Company | 2371 |
4 |
| Schlumberger Technology B.v. | 5228 |
3 |
| Services Petroliers Schlumberger | 5901 |
3 |
| Baker Hughes Incorporated | 5162 |
2 |
| Aramco Services Company | 4125 |
2 |
| OptaSense Holdings Limited | 193 |
2 |
| Baker Hughes Oilfield Operations, LLC | 2403 |
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 | 2769 |
1 |
| China National Petroleum Corporation | 481 |
1 |
| China Petroleum & Chemical Corporation | 1968 |
1 |
| CNPC USA Corp. | 169 |
1 |
| Other owners | 24 |