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Puller-thruster downhole tool
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Patent number 7,156,181
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Issue date Jan 2, 2007
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Western Well Tool, Inc.
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Norman Bruce Moore
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E21 - EARTH DRILLING MINING
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Puller-thruster downhole tool
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Patent number 7,059,417
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Issue date Jun 13, 2006
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Western Well Tool, Inc.
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Norman Bruce Moore
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E21 - EARTH DRILLING MINING
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Puller-thruster downhole tool
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Patent number 6,758,279
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Issue date Jul 6, 2004
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Western Well Tool, Inc.
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Norman Bruce Moore
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E21 - EARTH DRILLING MINING
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Puller-thruster downhole tool
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Patent number 6,601,652
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Issue date Aug 5, 2003
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Western Well Tool, Inc.
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Norman Bruce Moore
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E21 - EARTH DRILLING MINING
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Puller-thruster downhole tool
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Patent number 6,286,592
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Issue date Sep 11, 2001
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Western Well Tool, Inc.
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Norman Bruce Moore
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E21 - EARTH DRILLING MINING
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Puller-thruster downhole tool
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Patent number 6,003,606
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Issue date Dec 21, 1999
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Western Well Tool, Inc.
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Norman Bruce Moore
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E21 - EARTH DRILLING MINING
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Fluid actuated jack mechanism
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Patent number 4,494,376
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Issue date Jan 22, 1985
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Varco International, Inc.
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Ronald E. Beaufort
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E21 - EARTH DRILLING MINING