Dynamic mudcap drilling and well control system
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United States of America Patent
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May 11, 2004
Grant Date -
Nov 27, 2003
app pub date -
May 23, 2002
filing date -
May 23, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and an apparatus for a dynamic mudcap drilling and well control assembly is provided. In one embodiment, the apparatus comprises of a tubular body disposable in a well casing forming an outer annulus there between and an inner annulus formable between the body and a drill string disposed therein. The apparatus further includes a sealing member to seal the inner annulus at a location above a lower end of the tubular body and a pressure control member disposable in the inner annulus at a location above the lower end of the tubular body. In another embodiment, the assembly uses two rotating control heads, one at the top of the wellhead assembly in a conventional manner and a specially designed downhole unit. Finally, the assembly provides a method for allowing the well to produce hydrocarbons while tripping the drill string.
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