Dry drilling
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United States of America Patent
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Apr 13, 2010
Grant Date -
Mar 22, 2007
app pub date -
Jul 5, 2004
filing date -
Jul 8, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for drilling a bore through a target includes advancing a drill bit into the target along a direction of advancement and injecting a directing gas in the direction of advancement through at least one aperture in the drill bit. As the bore is drilled, waste material is directed in the direction of advancement via the gas.
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