MONO BORE RISER ADAPTER
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United States of America Patent
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Issued Date -
Jun 2, 2016
app pub date -
Dec 1, 2014
filing date -
Dec 1, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A riser adapter system for coupling a mono-bore riser to a dual bore subsea wellhead assembly with a main bore and an annulus bore, includes an upper adapter with an upper bore offset from a radially centered point of a downward facing face of the upper adapter. The upper bore is in fluid communication with a riser bore of the mono-bore riser. A lower adapter has a first end selectively mated to the downward facing face of the upper adapter and an opposite facing second end. The lower adapter has a lower bore offset from a central axis of the lower adapter. The downward facing face of the upper adapter and the second end of the lower adapter are alternately mated to the subset wellhead assembly so that the riser bore is alternately in fluid communication with the main bore and the annulus bore of the subsea wellhead assembly.
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