Subsea flowline connection yoke assembly and installation method

摘要

A marine compliant riser system is provided for attaching a flexible flowline to a buoyed conduit riser section. The improved system includes a novel yoke assembly for receiving flexible flowline with a means for retaining a terminal portion of the flexible flowline at a substantially vertical catenary departure angle. Pivotally-mounted loading gates or a yoke beam support the flexible flowlines during installation and/or replacement on the yoke. Connection means are mounted on the buoy section for establishing fluid communication between the flexible flowline and conduit at the buoyed riser section. An installation method is disclosed for completing the improved riser system in deepwater. This system is particularly adapted for oil and gas flowlines, service lines, hydraulic control and electrical conduits for connecting a subsea wellhead or production gathering eqiupment to a surface facility.