Guansheng QI

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Qingdao, CN

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Patents Grantslast 30 patents

Information Patent Grant
Ground wellhole dedicated protective pipe for gas extraction of min...
- Patent number 10,883,320
- Issue date Jan 5, 2021
- Shandong University of Science and Technology
- Wei Lu
- E21 - EARTH DRILLING MINING
Information Patent Grant
Dynamically self-balancing pressurized borehole-sealing apparatus a...
- Patent number 10,794,174
- Issue date Oct 6, 2020
- Shandong University of Science and Technology
- Wei Lu
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
GROUND WELLHOLE DEDICATED PROTECTIVE PIPE FOR GAS EXTRACTION OF MIN...
- Publication number 20200217202
- Publication date Jul 9, 2020
- Shandong University of Science and Technology
- Wei LU
- E21 - EARTH DRILLING MINING
Information Patent Application
DYNAMICALLY SELF-BALANCING PRESSURIZED BOREHOLE-SEALING APPARATUS A...
- Publication number 20190323340
- Publication date Oct 24, 2019
- Shandong University of Science and Technology
- Wei LU
- E21 - EARTH DRILLING MINING