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Qingdao City, CN
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Patents Grants
last 30 patents
Information
Patent Grant
Drilling-slitting-sealing-fracturing device and method for a deep l...
Patent number
11,506,041
Issue date
Nov 22, 2022
Shandong University of Science and Technology
Gang Wang
E21 - EARTH DRILLING MINING
Information
Patent Grant
Full-length screen pipe hole protection device and method with pres...
Patent number
11,396,810
Issue date
Jul 26, 2022
Shandong University of Science and Technology
Guanhua Ni
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
DEEP LOW-PERMEABILITY HIGH GASSY SEAM DRILLING-SLITTING-SEALING-FRA...
Publication number
20220213773
Publication date
Jul 7, 2022
SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Gang WANG
E21 - EARTH DRILLING MINING
Information
Patent Application
FULL-LENGTH SCREEN PIPE HOLE PROTECTION DEVICE AND METHOD WITH PRES...
Publication number
20220205361
Publication date
Jun 30, 2022
SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Guanhua NI
E21 - EARTH DRILLING MINING