Boost system and method for dual gradient drilling
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United States of America Patent
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Jun 16, 2015
Grant Date -
Jan 8, 2015
app pub date -
Jan 16, 2013
filing date -
Jan 31, 2012
priority date (Note) -
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Abstract
Boost system and method for dual gradient drilling where a marine riser (1) has a mud return line (14) connected at a first connection position (18) below the lowest foreseeable mud level (12) in the marine riser (1), and where a mud return pump (16) is connected to the mud return line (14), and where a recirculation line (20) that has a recirculation pump (22), is connected to the marine riser (1) at a second connection position (24) below the lowest foreseeable mud level (12) in the marine riser (1), and at a third connection position (26) on the marine riser (1) below said second connection position (24).
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