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Darrell Johnson
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Katy, TX, US
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Patents Grants
last 30 patents
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Patent Grant
Method for extracting coal bed methane with source fluid injection
Patent number
7,278,497
Issue date
Oct 9, 2007
Weatherford/Lamb
Jim Terry
E21 - EARTH DRILLING MINING
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Patent Grant
Apparatus and methods for utilizing a downhole deployment valve
Patent number
7,178,600
Issue date
Feb 20, 2007
Weatherford/Lamb, Inc.
Mike A. Luke
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
Method for extracting coal bed methane with source fluid injection
Publication number
20060006004
Publication date
Jan 12, 2006
Jim Terry
E21 - EARTH DRILLING MINING
Information
Patent Application
Apparatus and methods for utilizing a downhole deployment valve
Publication number
20040251032
Publication date
Dec 16, 2004
Weatherford/Lamb, Inc.
Mike A. Luke
E21 - EARTH DRILLING MINING