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Packer seal means and method
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Patent number 4,852,649
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Issue date Aug 1, 1989
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Otis Engineering Corporation
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Carter R. Young
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E21 - EARTH DRILLING MINING
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Downhole lock system
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Patent number 4,479,539
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Issue date Oct 30, 1984
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Otis Engineering Corporation
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Jack W. Tamplen
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E21 - EARTH DRILLING MINING
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Well tool
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Patent number 4,153,108
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Issue date May 8, 1979
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Otis Engineering Corporation
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Steve R. Pounds
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E21 - EARTH DRILLING MINING
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Well bore liner hanger
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Patent number 4,051,896
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Issue date Oct 4, 1977
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Otis Engineering Corporation
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Amareswar Amancharla
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E21 - EARTH DRILLING MINING
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Apparatus for treating wells
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Patent number 4,044,827
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Issue date Aug 30, 1977
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Otis Engineering Corporation
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Richard Kerzee
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E21 - EARTH DRILLING MINING
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Well plug with anchor means
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Patent number 4,007,783
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Issue date Feb 15, 1977
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Otis Engineering Corporation
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Amareswar Amancharla
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E21 - EARTH DRILLING MINING
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Well tools
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Patent number 3,946,807
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Issue date Mar 30, 1976
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Otis Engineering Corporation
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Amareswar Amancharla
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E21 - EARTH DRILLING MINING
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