Dynamic annular pressure control apparatus and method
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United States of America Patent
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Jun 14, 2005
Grant Date -
Oct 23, 2003
app pub date -
Feb 18, 2003
filing date -
Feb 20, 2002
priority date (Note) -
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Abstract
A system and method for controlling formation pressures during drilling of a subterranean formation utilizing a selectively fluid backpressure system in which fluid is pumped down the drilling fluid return system in response to detected borehole pressures. A pressure monitoring system is further provided to monitor detected borehole pressures, model expected borehole pressures for further drilling and control the fluid backpressure system.
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