- 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: 211
10-year publication summary
16
|
15
|
13
|
17
|
9
|
21
|
16
|
12
|
15
|
10
|
2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Halliburton Energy Services, Inc. | 20991 |
41 |
Saudi Arabian Oil Company | 13442 |
14 |
Schlumberger Technology Corporation | 10930 |
12 |
Baker Hughes Oilfield Operations, LLC | 2344 |
8 |
Hydra Systems AS | 37 |
7 |
Baker Hughes Incorporated | 5238 |
6 |
M-I L.L.C. | 809 |
6 |
Schlumberger Canada Limited | 7383 |
5 |
ConocoPhillips Company | 1682 |
5 |
Subsurface Technologies, Inc. | 14 |
5 |
Baker Hughes Holdings LLC | 3015 |
5 |
Schlumberger Technology B.v. | 5191 |
4 |
Services Petroliers Schlumberger | 5838 |
4 |
Geodynamics, Inc. | 195 |
3 |
Optimum Petroleum Services Inc. | 8 |
3 |
Weatherford U.K. Limited | 71 |
3 |
Comitt Well Solutions LLC | 28 |
3 |
Altus Intervention AS | 20 |
2 |
Archer Oil Tools AS | 17 |
2 |
ExxonMobil Upstream Research Company | 2389 |
2 |
Other owners | 71 |