Ya Liu

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Yangzhou, CN

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Patents Applicationslast 30 patents

Information Patent Application
ENERGY-GATHERED BUNDLE TYPE NESTING PLUGGING AND WALL REINFORCING D...
- Publication number 20190153809
- Publication date May 23, 2019
- China University of Petroleum-Beijing
- Yiqun Zhang
- E21 - EARTH DRILLING MINING
Information Patent Application
MULTI-PHASE DOWN HOLE INJECTOR
- Publication number 20120298364
- Publication date Nov 29, 2012
- Ganlu Liu
- E21 - EARTH DRILLING MINING