Autoreaming systems and methods
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United States of America Patent
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Sep 9, 2008
Grant Date -
Mar 15, 2007
app pub date -
Aug 31, 2006
filing date -
Dec 23, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
Methods and systems for controlling movement of a bit of a drilling assembly during reaming of an already-drilled hole; the methods, in certain aspects, including determining a ream speed for downward movement of the bit in the hole, moving the bit downward in a hole at the ream speed, determining a time period for deceleration of the bit to the hole bottom, determining a value for a target drilling parameter for drilling beyond the bottom of the hole, decelerating the bit (linearly or non-linearly) for the time period, and achieving the value for the target drilling parameter when the bit reaches the bottom of the hole.
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