Youquan Liu

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Beijing, CN

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Patents Applicationslast 30 patents

Information Patent Application
DEVICE AND METHOD FOR CONTINUOUS MIXING OF SOLID DRAG REDUCER
- Publication number 20220098941
- Publication date Mar 31, 2022
- PetroChina Company Ltd.
- Pengfei Chen
- E21 - EARTH DRILLING MINING
Information Patent Application
FILLING SYSTEM SUITABLE FOR SOLID DRAG REDUCING AGENT AND SOLID THI...
- Publication number 20210048149
- Publication date Feb 18, 2021
- PetroChina Company Ltd.
- Ying Xiong
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL