- 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: 441
10-year publication summary
|
27
|
40
|
28
|
33
|
54
|
26
|
33
|
27
|
25
|
30
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13686 |
67 |
| Halliburton Energy Services, Inc. | 21090 |
33 |
| Schlumberger Technology Corporation | 11075 |
23 |
| Ardyne Holdings Limited | 91 |
20 |
| Thru Tubing Solutions, Inc. | 382 |
19 |
| Baker Hughes Holdings LLC | 3002 |
15 |
| Aramco Services Company | 4099 |
14 |
| National Oilwell Varco, L.P. | 1701 |
11 |
| Baker Hughes Incorporated | 5172 |
10 |
| KLX Energy Services LLC | 74 |
9 |
| Bisn Tec Ltd | 81 |
8 |
| Schlumberger Canada Limited | 7440 |
7 |
| Schlumberger Technology B.v. | 5224 |
7 |
| Impact Selector International, LLC | 112 |
7 |
| Services Petroliers Schlumberger | 5885 |
7 |
| Robertson Intellectual Properties, LLC | 92 |
6 |
| Rotojar Innovations Limited | 28 |
6 |
| Baker Hughes, a GE Company, LLC | 2105 |
5 |
| Schlumberger Holdings Limited | 2784 |
4 |
| Landmark Graphics Corporation | 1515 |
4 |
| Other owners | 159 |