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Cementing head
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Patent number 7,802,620
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Issue date Sep 28, 2010
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Baker Hughes Incorporated
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David A. Arce
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E21 - EARTH DRILLING MINING
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Tieback seal system and method
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Patent number 7,735,562
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Issue date Jun 15, 2010
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Baker Hughes Incorporated
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Rodney D. Bennett
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E21 - EARTH DRILLING MINING
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Fluid filled drill pipe plug
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Patent number 6,595,282
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Issue date Jul 22, 2003
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Baker Hughes Incorporated
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Sidney K. Smith
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E21 - EARTH DRILLING MINING
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Liner hanger
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Patent number 6,431,277
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Issue date Aug 13, 2002
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Baker Hughes Incorporated
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James D. Cox
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E21 - EARTH DRILLING MINING
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Multi-port cementing head
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Patent number 6,182,752
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Issue date Feb 6, 2001
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Baker Hughes Incorporated
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Sidney K. Smith
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E21 - EARTH DRILLING MINING
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Running tool
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Patent number 5,794,694
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Issue date Aug 18, 1998
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Baker Hughes Incorporated
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Sidney K. Smith
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E21 - EARTH DRILLING MINING
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Running tool
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Patent number 5,551,512
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Issue date Sep 3, 1996
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Baker Hughes Incorporated
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Sidney K. Smith
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E21 - EARTH DRILLING MINING
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Adjustable collet
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Patent number 4,722,390
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Issue date Feb 2, 1988
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Hughes Tool Company
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Sidney K. Smith
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E21 - EARTH DRILLING MINING
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