- 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 49/06 - Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil using side-wall drilling tools or scrapers
Patent holdings for IPC class E21B 49/06
Total number of patents in this class: 231
10-year publication summary
|
6
|
9
|
11
|
18
|
8
|
9
|
13
|
9
|
6
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Technology Corporation | 9690 |
34 |
| Halliburton Energy Services, Inc. | 20165 |
27 |
| Schlumberger Canada Limited | 6913 |
22 |
| Schlumberger Technology B.v. | 4951 |
20 |
| Services Petroliers Schlumberger | 5426 |
20 |
| Schlumberger Holdings Limited | 2947 |
17 |
| Prad Research and Development Limited | 2696 |
14 |
| Saudi Arabian Oil Company | 11322 |
14 |
| Baker Hughes Incorporated | 5689 |
10 |
| Baker Hughes, a GE Company, LLC | 2171 |
5 |
| China National Offshore Oil Corporation | 86 |
4 |
| China Oilfield Services Limited | 79 |
4 |
| Aramco Services Company | 3504 |
3 |
| Tracto-Technik GmbH & Co. KG | 166 |
3 |
| BP Exploration Operating Company Limited | 270 |
2 |
| ENI S.p.A. | 1241 |
2 |
| GDF Suez | 43 |
2 |
| Prad Research and Development NV | 264 |
2 |
| Landmark Graphics Corporation | 1526 |
1 |
| Big Guns Energy Services Inc. | 7 |
1 |
| Other owners | 24 |