- 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 49/06 - Testing the nature of borehole wallsFormation testingMethods 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: 239
10-year publication summary
|
10
|
17
|
7
|
9
|
12
|
10
|
6
|
7
|
7
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Technology Corporation | 11326 |
39 |
| Halliburton Energy Services, Inc. | 21125 |
27 |
| Schlumberger Canada Limited | 7511 |
23 |
| Schlumberger Technology B.v. | 5257 |
20 |
| Services Petroliers Schlumberger | 5940 |
20 |
| Schlumberger Holdings Limited | 2754 |
15 |
| Saudi Arabian Oil Company | 13886 |
15 |
| Prad Research and Development Limited | 2683 |
14 |
| Baker Hughes Incorporated | 5094 |
9 |
| China Oilfield Services Limited | 91 |
6 |
| China National Offshore Oil Corporation | 91 |
5 |
| Baker Hughes, a GE Company, LLC | 2105 |
5 |
| Aramco Services Company | 4157 |
3 |
| ENI S.p.A. | 1297 |
3 |
| Tracto-Technik GmbH & Co. KG | 170 |
3 |
| BP Exploration Operating Company Limited | 260 |
2 |
| GDF Suez | 37 |
2 |
| Landmark Graphics Corporation | 1509 |
1 |
| Big Guns Energy Services Inc. | 7 |
1 |
| CGG Services SA | 431 |
1 |
| Other owners | 25 |