Xiaoqiang ZHAI

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Wellbore pressure correction method
- Patent number 9,759,026
- Issue date Sep 12, 2017
- Drilling Research Institute of China National Petroleum Company
- Wei Liu
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
WELLBORE PRESSURE CORRECTION METHOD
- Publication number 20170138137
- Publication date May 18, 2017
- Drilling Research Institute of China National Petroleum Company
- Wei LIU
- E21 - EARTH DRILLING MINING
Information Patent Application
METHODS OF WELL TRAJECTORY AND DRILLING OPTIMIZED CONTROL FOR FRACT...
- Publication number 20170138175
- Publication date May 18, 2017
- Drilling Research Institute of China National Petr oleum Company
- Lin SHI
- E21 - EARTH DRILLING MINING