- 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 49/04 - 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 explosives in boreholesTesting 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 projectiles penetrating the wall
Patent holdings for IPC class E21B 49/04
Total number of patents in this class: 30
10-year publication summary
|
1
|
0
|
1
|
5
|
5
|
2
|
1
|
1
|
0
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20977 |
8 |
| Hypersciences, Inc. | 42 |
4 |
| BP Exploration Operating Company Limited | 268 |
3 |
| Reflex Instruments Asia Pacific Pty Ltd | 86 |
3 |
| Schlumberger Technology Corporation | 10914 |
1 |
| Schlumberger Canada Limited | 7373 |
1 |
| Schlumberger Technology B.v. | 5189 |
1 |
| Schlumberger Holdings Limited | 2800 |
1 |
| Baker Hughes Incorporated | 5243 |
1 |
| BP Corporation North America Inc. | 748 |
1 |
| Pietro Fiorentini SpA | 106 |
1 |
| Prad Research and Development Limited | 2690 |
1 |
| Saudi Arabian Oil Company | 13428 |
1 |
| Services Petroliers Schlumberger | 5835 |
1 |
| Pietro Fiorentini USA, Inc | 8 |
1 |
| Defiant Engineering, LLC | 32 |
1 |
| Other owners | 0 |