Downhole tool
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United States of America Patent
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Apr 1, 2008
Grant Date -
Jan 19, 2006
app pub date -
Jul 15, 2005
filing date -
Jul 16, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A downhole tool for use within a well comprising a body having an external diameter smaller than the diameter of the well so as to form an annular gap between the body and the interior surface of the well. A first downhole fluid passage having an upper inlet and a lower outlet is provided in the body. At least one secondary fluid passage extending between the first downhole fluid passage and the annular gap is provided at the body. A sleeve member is provided at the body and adapted to move between a first position in which said at least one secondary fluid passage is closed and a second position in which said at least one secondary fluid passage is open. The sleeve member is maintained at one or both of the first and second positions upon rotation of the body within the well.
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