Continuous circulation drilling method
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United States of America Patent
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-
Nov 13, 2001
Grant Date -
N/A
app pub date -
Apr 12, 1999
filing date -
Oct 15, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method for drilling wells in which the tubular (5) can be added or removed from the drill string (17) while the drill is rotating with the mud and drilling fluids being circulated continuously and kept separated from the environment to reduce pollution. A connector is used with an inlet (15) and outlet (10) for the mud etc. and which incorporates rams (11) to seal off and separate the flow of mud as a tubular is added or removed.
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