Well drilling and production using a surface blowout preventer
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United States of America Patent
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May 15, 2012
Grant Date -
Dec 24, 2009
app pub date -
Sep 3, 2009
filing date -
Oct 30, 2003
priority date (Note) -
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Abstract
Production and drilling may be achieved by a system which uses a rotating head coupled to surface blowout preventer stack for fluid flow control. A casing connects these surface components to a subsea shutoff assembly with a pair of ram shear devices to cut off the string to the wellhead. Both the casing and an alternate line may be latched so that they may be released if necessary. The rotating head may include a rubber packer to prevent upward flow of drilling fluid and production hydrocarbons and, at the same time, provide rotation to the drill string. Managed pressure drilling or under balanced drilling may be used in some embodiments.
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