Qingyun LI

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Qingdao, CN

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Patents Grantslast 30 patents

Information Patent Grant
Multi-path combined high-low voltage plasma drilling power source a...
- Patent number 11,268,326
- Issue date Mar 8, 2022
- China University of Petroleum (East China)
- Yonghong Liu
- E21 - EARTH DRILLING MINING
Information Patent Grant
Multi-path combined high-low voltage plasma rock-breaking drill bit...
- Patent number 11,085,245
- Issue date Aug 10, 2021
- China University of Petroleum (East China)
- Yonghong Liu
- E21 - EARTH DRILLING MINING
Information Patent Grant
Movable combined sand control pipe of axial and radial slotted scre...
- Patent number 9,970,270
- Issue date May 15, 2018
- CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
- Yonghong Liu
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
MULTI-PATH COMBINED HIGH-LOW VOLTAGE PLASMA DRILLING POWER SOURCE A...
- Publication number 20200217140
- Publication date Jul 9, 2020
- CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
- Yonghong LIU
- E21 - EARTH DRILLING MINING
Information Patent Application
MULTI-PATH COMBINED HIGH-LOW VOLTAGE PLASMA ROCK-BREAKING DRILL BIT...
- Publication number 20200217143
- Publication date Jul 9, 2020
- CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
- Yonghong LIU
- E21 - EARTH DRILLING MINING
Information Patent Application
MOVABLE COMBINED SAND CONTROL PIPE OF AXIAL AND RADIAL SLOTTED SCRE...
- Publication number 20170218736
- Publication date Aug 3, 2017
- CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
- Yonghong LIU
- E21 - EARTH DRILLING MINING