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Patents Grants
last 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 Applications
last 30 patents
Information
Patent Application
PLASTIC GEL MATERIAL FOR PREVENTING SPONTANEOUS COMBUSTION OF COAL
Publication number
20210154510
Publication date
May 27, 2021
SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Xiangming HU
E21 - EARTH DRILLING MINING
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