Intermittent high-drag oil well drilling methods and apparatus
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United States of America Patent
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Mar 17, 1981
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N/A
app pub date -
Mar 28, 1979
filing date -
Mar 28, 1979
priority date (Note) -
Expired
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Abstract
Methods and apparatus are disclosed for the rapid and efficient drilling of oil well and other types of bore holes through tough abrasive underground formations, which methods and apparatus utilize high drag intermittent contact and cooling techniques to provide good rates of penetration with low wear and heat deterioration on the drilling tools.
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