Hai Tao Ren

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Chengdu, CN

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Patents Grantslast 30 patents

Information Patent Grant
Scraping-wheel drill bit
- Patent number 9,103,168
- Issue date Aug 11, 2015
- Southwest Petroleum University
- Ying Xin Yang
- E21 - EARTH DRILLING MINING
Information Patent Grant
Composite drill bit
- Patent number 8,985,243
- Issue date Mar 24, 2015
- Southwest Petroleum University
- Ying Xin Yang
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
SCRAPING-WHEEL DRILL BIT
- Publication number 20130126246
- Publication date May 23, 2013
- Ying Xin Yang
- E21 - EARTH DRILLING MINING
Information Patent Application
COMPOSITE DRILL BIT
- Publication number 20130126247
- Publication date May 23, 2013
- Ying Xin Yang
- E21 - EARTH DRILLING MINING