Jifang Wan

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Jingzhou City, CN

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Patents Grantslast 30 patents

Information Patent Grant
Two-stroke pumping method and oil production device
- Patent number 12,258,949
- Issue date Mar 25, 2025
- Yangtze University
- Xianzhong Yi
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Downhole displacement impact method and impact drilling tool
- Patent number 11,851,952
- Issue date Dec 26, 2023
- Yangtze University
- Xianzhong Yi
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
TWO-STROKE PUMPING METHOD AND OIL PRODUCTION DEVICE
- Publication number 20230024940
- Publication date Jan 26, 2023
- Yangtze University
- Xianzhong YI
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
DOWNHOLE DISPLACEMENT IMPACT METHOD AND IMPACT DRILLING TOOL
- Publication number 20230009356
- Publication date Jan 12, 2023
- Yangtze University
- Xianzhong Yi
- E21 - EARTH DRILLING MINING