Downhole turbine
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United States of America Patent
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-
Oct 30, 2012
Grant Date -
Mar 5, 2009
app pub date -
Oct 31, 2008
filing date -
Nov 21, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In one aspect of the present invention, a drill bit has a jack element that is substantially coaxial with an axis of rotation of the drill bit and the jack element has an asymmetrical distal end that extends beyond a working face of the drill bit. A turbine is located within a bore formed in the drill bit and a flow valve is actuated by the turbine. The flow valve is adapted to route a drilling fluid in the bore into a porting mechanism adapted to extend the jack element farther beyond the working surface of the drill bit. The turbine is also adapted to rotate the jack element at variable speeds.
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