Huiwen Xu

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Changchun City, CN

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Patents Grantslast 30 patents

Information Patent Grant
Forced cooling circulation system for drilling mud
- Patent number 9,062,509
- Issue date Jun 23, 2015
- JILIN UNIVERSITY
- Youhong Sun
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
FORCED COOLING CIRCULATION SYSTEM FOR DRILLING MUD
- Publication number 20120297801
- Publication date Nov 29, 2012
- Youhong Sun
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...