- 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 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: 413
10-year publication summary
|
37
|
35
|
45
|
31
|
38
|
58
|
28
|
33
|
28
|
11
|
| 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 |
55 |
| Halliburton Energy Services, Inc. | 20165 |
31 |
| Schlumberger Technology Corporation | 9690 |
20 |
| Baker Hughes Holdings LLC | 3060 |
17 |
| Ardyne Holdings Limited | 86 |
16 |
| Thru Tubing Solutions, Inc. | 361 |
15 |
| Baker Hughes Incorporated | 5689 |
13 |
| Aramco Services Company | 3504 |
13 |
| National Oilwell Varco, L.P. | 1604 |
10 |
| Bisn Tec Ltd | 74 |
8 |
| KLX Energy Services LLC | 75 |
8 |
| Impact Selector International, LLC | 117 |
7 |
| Schlumberger Canada Limited | 6913 |
6 |
| Robertson Intellectual Properties, LLC | 88 |
6 |
| Rotojar Innovations Limited | 29 |
6 |
| Schlumberger Technology B.v. | 4951 |
5 |
| ENI S.p.A. | 1241 |
5 |
| Services Petroliers Schlumberger | 5426 |
5 |
| Baker Hughes, a GE Company, LLC | 2171 |
5 |
| Schlumberger Holdings Limited | 2947 |
4 |
| Other owners | 158 |