FORMING A SUBSEA WELLBORE
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United States of America Patent
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Issued Date -
Jun 22, 2017
app pub date -
Feb 15, 2015
filing date -
Apr 15, 2014
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Abstract
A riserless subsea drilling system includes a tubular drilling string including a drilling bit; a rotating control device including a seal sealed to the drilling string; and a drilling fluid circuit that circulates drilling fluid from a supply line, through an annulus exterior the drilling string and below the rotating control device, through the drilling bit at a downhole end of the drilling string, and through the drilling string toward an uphole end of the drilling string.
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