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Multiple zones frac tool
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Patent number 6,896,061
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Issue date May 24, 2005
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Halliburton Energy Services, Inc.
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Iosif J. Hriscu
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E21 - EARTH DRILLING MINING
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Frac plug with caged ball
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Patent number 6,491,116
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Issue date Dec 10, 2002
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Halliburton Energy Services, Inc.
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Kevin T. Berscheidt
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E21 - EARTH DRILLING MINING
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Frac plug with caged ball
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Patent number 6,394,180
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Issue date May 28, 2002
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Halliburton Energy Service,s Inc.
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Kevin T. Berscheidt
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E21 - EARTH DRILLING MINING
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