Method and apparatus for evaluating accuracy in positioning a receiver point
US-11493595-B2 · Nov 8, 2022 · US
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China Nat Petroleum Corp patents in 2022
China Nat Petroleum Corp was listed as an assignee on 4 patent publications in 2022.
| Metric | Value |
|---|---|
| Company | China Nat Petroleum Corp |
| Year | 2022 |
| Patents | 4 |
Patents
Representative publications for China Nat Petroleum Corp in 2022.
Calibration and verification system and method for directional sensor
US-2022252440-A1 · Aug 11, 2022 · US
Cutting element with non-planar cutting edges
US-11365589-B2 · Jun 21, 2022 · US
Expansion tool assembly for expandable tubular
US-11293254-B2 · Apr 5, 2022 · US
Top CPC classifications
Most common classification codes for China Nat Petroleum Corp in 2022.
| CPC | Patents |
|---|---|
| E21B10/55 | 1 |
| E21B10/5673 | 1 |
| E21B33/1208 | 1 |
| E21B33/1295 | 1 |
| E21B43/105 | 1 |
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