DEEP WATER AND ULTRA DEEP WATER MOORING SYSTEM
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United States of America Patent
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Issued Date -
Feb 16, 2012
app pub date -
Feb 19, 2010
filing date -
Feb 20, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A mooring and flowline system is disclosed for mooring a floating production and/or storage vessel (10) to the seabed (12) and one or more flowlines (22, 24) for connection to one or more producing wells or to a facility. The system comprises at least two anchors in the sea bed (12) and a respective anchor riser (14) extending from each of the anchors to a common mooring node member (18). A mooring pendant (20) extends from the common mooring node member (18), where the mooring pendant (20) has an upper end for connection, in use, to the vessel (10). Each flowline (22, 24) comprises a lower flowline (22) and a flowline riser (24) extending from the lower flowline (22) to the vessel (10). Each flowline riser (24) has part of its length secured to the mooring pendant (20) by one or more guide frames (32) to control sideways and rotational movement. Furthermore, buoyancy is provided on, in-between, for or by at least one of the guide frames (32), wherein the buoyancy is sufficient to support the common mooring node member (18) and mooring pendant (20) below the surface of the sea and above the seabed (12) when the mooring pendant (20) is disconnected from the vessel (10).
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