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Drill bit arm pocket
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Patent number 10,494,872
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Issue date Dec 3, 2019
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Halliburton Energy Services, Inc.
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Micheal Burl Crawford
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E21 - EARTH DRILLING MINING
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Symmetrical seal
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Patent number 9,988,850
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Issue date Jun 5, 2018
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Halliburton Energy Services, Inc.
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Micheal B. Crawford
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E21 - EARTH DRILLING MINING
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Seal assembly for drill bit
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Patent number 8,448,723
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Issue date May 28, 2013
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Burintekh USA, LLC
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Micheal Burl Crawford
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E21 - EARTH DRILLING MINING
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