Oil and gas zone effectiveness evaluation method and apparatus
US-11193372-B2 · Dec 7, 2021 · US
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Petrochina Co Ltd patents in 2021
Petrochina Co Ltd was listed as an assignee on 51 patent publications in 2021.
| Metric | Value |
|---|---|
| Company | Petrochina Co Ltd |
| Year | 2021 |
| Patents | 51 |
Patents
Representative publications for Petrochina Co Ltd in 2021.
Method and Apparatus for Determining Integrated Exploitation Approach of Shale and Adjacent Oil Reservoirs
US-2021372280-A1 · Dec 2, 2021 · US
Downhole oil, gas, water and sand separation method and separator
US-11180980-B2 · Nov 23, 2021 · US
Microbubble generation device and equipment
US-11179683-B2 · Nov 23, 2021 · US
Gamma ray spectrum unfolding method for elemental capture spectroscopy logging and device therefor
US-2021355822-A1 · Nov 18, 2021 · US
Top CPC classifications
Most common classification codes for Petrochina Co Ltd in 2021.
| CPC | Patents |
|---|---|
| E21B49/00 | 13 |
| G01V3/38 | 7 |
| E21B43/20 | 5 |
| G01N24/081 | 5 |
| G01R33/448 | 5 |
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