Apparatus and methods for controlling bottomhole assembly temperature during a pause in drilling boreholes
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United States of America Patent
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Sep 18, 2012
Grant Date -
Mar 3, 2011
app pub date -
Aug 24, 2010
filing date -
Aug 25, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method for reducing temperature of a bottomhole assembly during a drilling operation is disclosed, that, in one aspect, may include: drilling a borehole using a drillstring including a bottomhole assembly by circulating a fluid through the drillstring and an annulus between the drillstring and the borehole, pausing drilling, continuing circulating the fluid through the dill string and the annulus. The method further includes diverting a portion of the fluid from the drillstring into the annulus at a selected location above the drill bit to reduce temperature of the bottomhole assembly.
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