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Liuqing Yang
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Rosharon, TX, US
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Patents Grants
last 30 patents
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Patent Grant
Swellable packer
Patent number
9,243,473
Issue date
Jan 26, 2016
Schlumberger Technology Corporation
Liuqing Yang
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
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Patent Application
SWELLABLE PACKER
Publication number
20140014374
Publication date
Jan 16, 2014
Liuqing Yang
E21 - EARTH DRILLING MINING