APPARATUS AND METHOD FOR SUBSEA WELL DRILLING AND CONTROL
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United States of America Patent
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Issued Date -
Jul 10, 2014
app pub date -
Mar 11, 2014
filing date -
Dec 2, 2009
priority date (Note) -
Abandoned
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Abstract
A subsea assembly suitable for subsea drilling and intervention operations includes a dual blowout preventer system having an upper blowout preventer located between a drill floor and a high pressure riser string, and a lower blowout preventer located below the riser string and above a wellhead. The dual blowout preventer system is adapted to enable advanced drilling and intervention operations such as managed pressure drilling, underbalanced drilling, dual gradient drilling, or through tubing rotary drilling, and slim hole drilling in an offshore deepwater environment.
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