- 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 47/113 - Locating fluid leaks, intrusions or movements using electrical indicationsLocating fluid leaks, intrusions or movements using light radiation
Patent holdings for IPC class E21B 47/113
Total number of patents in this class: 187
10-year publication summary
|
5
|
13
|
17
|
11
|
24
|
24
|
19
|
15
|
13
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21098 |
47 |
| Saudi Arabian Oil Company | 13857 |
34 |
| Schlumberger Technology Corporation | 11274 |
10 |
| Aramco Services Company | 4157 |
7 |
| Lytt Limited | 51 |
6 |
| Nike, Inc. | 14515 |
5 |
| California Institute of Technology | 4010 |
5 |
| Hifi Engineering Inc. | 136 |
5 |
| Schlumberger Canada Limited | 7487 |
4 |
| Baker Hughes Oilfield Operations, LLC | 2405 |
4 |
| Schlumberger Technology B.v. | 5245 |
3 |
| Chevron U.S.A. Inc. | 4048 |
3 |
| ConocoPhillips Company | 1698 |
3 |
| Kemira Oyj | 1231 |
3 |
| Services Petroliers Schlumberger | 5923 |
3 |
| Weatherford Technology Holdings, LLC | 2033 |
2 |
| Board of Supervisors of Louisiana State University and Agricultural and Mechanical College | 823 |
2 |
| China Petroleum & Chemical Corporation | 1997 |
2 |
| ExxonMobil Upstream Research Company | 2358 |
2 |
| Kemira Chemicals, Inc. | 78 |
2 |
| Other owners | 35 |