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Side tracking bit
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Patent number 6,460,633
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Issue date Oct 8, 2002
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W. B. Driver
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E21 - EARTH DRILLING MINING
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Flexible drill pipe
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Patent number 6,302,797
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Issue date Oct 16, 2001
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W. B. Driver
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Flexible drill pipe
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Patent number 4,233,820
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Issue date Nov 18, 1980
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W. B. Driver
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E21 - EARTH DRILLING MINING
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Flexible drill pipe
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Patent number 4,149,391
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Issue date Apr 17, 1979
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W. B. Driver
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E21 - EARTH DRILLING MINING
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Core cut off cable
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Patent number 4,102,417
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Issue date Jul 25, 1978
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W. B. Driver
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E21 - EARTH DRILLING MINING
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Flexible drill pipe
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Patent number 4,031,713
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Issue date Jun 28, 1977
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W. B. Driver
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E21 - EARTH DRILLING MINING
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