- 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 31/00 - Fishing for or freeing objects in boreholes or wells
Patent holdings for IPC class E21B 31/00
Total number of patents in this class: 459
10-year publication summary
|
45
|
31
|
38
|
58
|
28
|
35
|
31
|
25
|
33
|
18
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 14296 |
71 |
| Halliburton Energy Services, Inc. | 21318 |
34 |
| Schlumberger Technology Corporation | 11857 |
25 |
| Thru Tubing Solutions, Inc. | 404 |
24 |
| Baker Hughes Holdings LLC | 3024 |
15 |
| Aramco Services Company | 4193 |
14 |
| Ardyne Holdings Limited | 60 |
14 |
| Weatherford Technology Holdings, LLC | 2162 |
11 |
| National Oilwell Varco, L.P. | 1702 |
11 |
| Baker Hughes Incorporated | 4916 |
10 |
| KLX Energy Services LLC | 80 |
10 |
| Schlumberger Canada Limited | 7613 |
8 |
| Schlumberger Technology B.v. | 5297 |
8 |
| Bisn Tec Ltd | 84 |
8 |
| Services Petroliers Schlumberger | 6029 |
8 |
| Robertson Intellectual Properties, LLC | 94 |
6 |
| Rotojar Innovations Limited | 27 |
6 |
| Baker Hughes, a GE Company, LLC | 2051 |
5 |
| Schlumberger Holdings Limited | 2686 |
4 |
| Landmark Graphics Corporation | 1505 |
4 |
| Other owners | 163 |