- 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 47/117 - Detecting leaks, e.g. from tubing, by pressure testing
Patent holdings for IPC class E21B 47/117
Total number of patents in this class: 216
10-year publication summary
|
15
|
5
|
3
|
13
|
25
|
25
|
44
|
37
|
32
|
7
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 11322 |
38 |
| Halliburton Energy Services, Inc. | 20165 |
31 |
| Schlumberger Technology Corporation | 9690 |
9 |
| Weatherford Technology Holdings, LLC | 2135 |
9 |
| Aramco Services Company | 3504 |
6 |
| Equinor Energy AS | 475 |
6 |
| Landmark Graphics Corporation | 1526 |
5 |
| Exedra AS | 7 |
5 |
| ConocoPhillips Company | 1657 |
4 |
| Hifi Engineering Inc. | 125 |
4 |
| Vertice Oil Tools Inc. | 87 |
4 |
| Baker Hughes Incorporated | 5689 |
3 |
| Aker Solutions AS | 226 |
3 |
| FMC Technologies, Inc. | 603 |
3 |
| Ingu Solutions Inc. | 31 |
3 |
| Petroleo Brasileiro S.A. - Petrobras | 730 |
3 |
| BHE Compression Services, LLC | 6 |
3 |
| eWellbore, LLC | 3 |
3 |
| Engip LLC | 8 |
2 |
| Expro North Sea Limited | 215 |
2 |
| Other owners | 70 |