- 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 47/113 - Locating fluid leaks, intrusions or movements using light radiation
Patent holdings for IPC class E21B 47/113
Total number of patents in this class: 159
10-year publication summary
|
6
|
5
|
7
|
13
|
19
|
13
|
29
|
25
|
16
|
4
|
| 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 |
41 |
| Saudi Arabian Oil Company | 11322 |
28 |
| Schlumberger Technology Corporation | 9690 |
8 |
| Lytt Limited | 51 |
6 |
| Aramco Services Company | 3504 |
5 |
| California Institute of Technology | 3884 |
4 |
| Kemira Oyj | 1167 |
4 |
| Schlumberger Canada Limited | 6913 |
3 |
| Schlumberger Technology B.v. | 4951 |
3 |
| ConocoPhillips Company | 1657 |
3 |
| Hifi Engineering Inc. | 125 |
3 |
| Services Petroliers Schlumberger | 5426 |
3 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
3 |
| Nike, Inc. | 13075 |
2 |
| Chevron U.S.A. Inc. | 3774 |
2 |
| Weatherford Technology Holdings, LLC | 2135 |
2 |
| China Petroleum & Chemical Corporation | 1623 |
2 |
| ExxonMobil Upstream Research Company | 2525 |
2 |
| Kemira Chemicals, Inc. | 78 |
2 |
| Petroleum Engineering Institute of Zyof Branch, Sinopec | 3 |
2 |
| Other owners | 31 |