- 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 37/08 - Methods or apparatus for cleaning boreholes or wells cleaning in situ of down-hole filters, screens, or gravel packs
Patent holdings for IPC class E21B 37/08
Total number of patents in this class: 207
10-year publication summary
|
15
|
13
|
17
|
9
|
21
|
16
|
12
|
15
|
12
|
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 |
40 |
| Saudi Arabian Oil Company | 13857 |
13 |
| Schlumberger Technology Corporation | 11274 |
12 |
| Baker Hughes Oilfield Operations, LLC | 2405 |
8 |
| Hydra Systems AS | 36 |
7 |
| Baker Hughes Incorporated | 5109 |
6 |
| Schlumberger Canada Limited | 7487 |
5 |
| ConocoPhillips Company | 1698 |
5 |
| Baker Hughes Holdings LLC | 2986 |
5 |
| Schlumberger Technology B.v. | 5245 |
4 |
| M-I L.L.C. | 789 |
4 |
| Services Petroliers Schlumberger | 5923 |
4 |
| Subsurface Technologies, Inc. | 12 |
4 |
| Geodynamics, Inc. | 195 |
3 |
| Optimum Petroleum Services Inc. | 8 |
3 |
| Weatherford U.K. Limited | 71 |
3 |
| Comitt Well Solutions LLC | 28 |
3 |
| Workover Solutions, Inc. | 54 |
3 |
| Altus Intervention AS | 20 |
2 |
| Archer Oil Tools AS | 18 |
2 |
| Other owners | 71 |