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High temperature packers
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Patent number 9,518,438
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Issue date Dec 13, 2016
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Chevron U.S.A. Inc.
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Kai Sun
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E21 - EARTH DRILLING MINING
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Multi-function indicating tool
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Patent number 7,997,344
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Issue date Aug 16, 2011
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Baker Hughes Incorporated
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Thomas G. Corbett
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E21 - EARTH DRILLING MINING
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Screen saver sub
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Patent number 7,647,968
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Issue date Jan 19, 2010
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Baker Hughes Incorporated
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Thomas G. Corbett
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E21 - EARTH DRILLING MINING
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Washpipeless frac pack system
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Patent number 7,451,816
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Issue date Nov 18, 2008
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Baker Hughes Incorporated
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Thomas G. Corbett
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E21 - EARTH DRILLING MINING
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Washpipeless frac pack system
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Patent number 7,290,610
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Issue date Nov 6, 2007
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Baker Hughes Incorporated
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Thomas G. Corbett
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E21 - EARTH DRILLING MINING
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Auto entry guide
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Patent number 7,278,493
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Issue date Oct 9, 2007
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Baker Hughes Incorporated
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Thomas G. Corbett
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E21 - EARTH DRILLING MINING
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