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Qingdao, CN
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Patents Grants
last 30 patents
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Patent Grant
Surface layer conductor running tool for deep-water well drilling
Patent number
9,631,450
Issue date
Apr 25, 2017
China University of Petroleum (East China)
Baojiang Sun
E21 - EARTH DRILLING MINING
Information
Patent Grant
Subsea wellhead pressure indicating and automatic adjusting device...
Patent number
9,605,499
Issue date
Mar 28, 2017
China University of Petroleum (East China)
Baojiang Sun
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
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Patent Application
SURFACE LAYER CONDUCTOR RUNNING TOOL FOR DEEP-WATER WELL DRILLING
Publication number
20170089161
Publication date
Mar 30, 2017
China University of Petroleum (East China)
Baojiang Sun
E21 - EARTH DRILLING MINING