Zheng Liu

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Qingdao, CN

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Patents Grantslast 30 patents

Information Patent Grant
Active control method and control device for wellbore pressure in t...
- Patent number 11,002,126
- Issue date May 11, 2021
- CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
- Zhiyuan Wang
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Active control method and control device for wellbore pressure in t...
- Publication number 20210087918
- Publication date Mar 25, 2021
- China University of Petroleum
- Zhiyuan Wang
- E21 - EARTH DRILLING MINING