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High efficiency drill pipe
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Patent number RE39869
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Issue date Oct 9, 2007
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Grant Prideco, L.P.
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Michael Payne
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285 - Pipe joints or couplings
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Oilfield tubular connection
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Patent number 6,447,025
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Issue date Sep 10, 2002
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Grant Prideco, L.P.
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Jackie E. Smith
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E21 - EARTH DRILLING MINING
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Shoulder dressing apparatus
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Patent number 5,433,130
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Issue date Jul 18, 1995
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Grant TFW, Inc.
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Jackie E. Smith
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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