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Zhaozheng TENG
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Dongying City, CN
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Patents Grants
last 30 patents
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Patent Grant
Downhole casing expansion tool and method of expanding casings usin...
Patent number
9,347,297
Issue date
May 24, 2016
China Petroleum and Chemical Corporation
Zuohui Li
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
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Patent Application
DOWNHOLE CASING EXPANSION TOOL AND METHOD OF EXPANDING CASINGS USIN...
Publication number
20140110136
Publication date
Apr 24, 2014
Drilling Technology Research Institute of Sinopec Oilfield Service Shengli Co...
Zuohui LI
E21 - EARTH DRILLING MINING