Yueming Zheng

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Sichuan, CN

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Patents Grantslast 30 patents

Information Patent Grant
Vertical high speed testing device for spiral seal of cone bit bearing
- Patent number 10,429,274
- Issue date Oct 1, 2019
- Southwest Petrolem Univeristy
- Yi Zhou
- E21 - EARTH DRILLING MINING
Information Patent Grant
Horizontal high speed testing device for spiral seal of horizontal...
- Patent number 10,393,615
- Issue date Aug 27, 2019
- Southwest Petroleum University
- Yi Zhou
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
VERTICAL HIGH SPEED TESTING DEVICE FOR SPIRAL SEAL OF CONE BIT BEARING
- Publication number 20180348090
- Publication date Dec 6, 2018
- Southwest Petroleum University
- Yi Zhou
- E21 - EARTH DRILLING MINING
Information Patent Application
HORIZONTAL HIGH SPEED TESTING DEVICE FOR SPIRAL SEAL OF HORIZONTAL...
- Publication number 20180348082
- Publication date Dec 6, 2018
- Southwest Petroleum University
- Yi Zhou
- E21 - EARTH DRILLING MINING