- 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 47/117 - Detecting leaks, e.g. from tubing, by pressure testing
Patent holdings for IPC class E21B 47/117
Total number of patents in this class: 307
10-year publication summary
|
4
|
2
|
11
|
24
|
23
|
42
|
39
|
35
|
36
|
45
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13512 |
60 |
| Halliburton Energy Services, Inc. | 21020 |
38 |
| Schlumberger Technology Corporation | 10957 |
19 |
| Weatherford Technology Holdings, LLC | 2036 |
12 |
| Equinor Energy AS | 506 |
7 |
| Aramco Services Company | 4058 |
6 |
| ConocoPhillips Company | 1683 |
6 |
| Landmark Graphics Corporation | 1525 |
5 |
| Hifi Engineering Inc. | 131 |
5 |
| Exedra AS | 7 |
5 |
| Forum US, Inc. | 339 |
4 |
| Seismos Inc. | 43 |
4 |
| Vertice Oil Tools Inc. | 94 |
4 |
| eWellbore, LLC | 4 |
4 |
| Baker Hughes Incorporated | 5233 |
3 |
| Aker Solutions AS | 243 |
3 |
| FMC Technologies, Inc. | 613 |
3 |
| Petroleo Brasileiro S.A. - Petrobras | 871 |
3 |
| X Development LLC | 1316 |
3 |
| Baker Hughes Oilfield Operations, LLC | 2360 |
3 |
| Other owners | 110 |