RISER CONNECTION CONSTRUCTION METHOD IN DEEP SEABED

摘要

A riser connection construction method in the deep seabed is disclosed. The riser connection construction method in the deep seabed connects a flow line installed in the seabed with a riser of a floating offshore structure in order to transfer gas or crude oil. The riser connection construction method in the deep seabed comprises: a step of preparing a riser connection structure which integrates functions of a low riser assembly used in a free standing hybrid riser (FSHR) a jumper, and a pipe line terminal together; a step of towing a riser manufactured on shore to a construction site; a step of loading the riser connection structure in a ship, and connecting the riser connection structure with the towed riser after arriving at the construction site; a step of unloading the riser connection structure connected with the riser to the seabed, and then installing the riser connection structure in a foundation previously installed in the seabed; and a step of connecting a flow line with the riser connection structure. The riser connection system in the deep seabed can save seabed construction time and costs as an innovative technology by using the riser connection structure which integrates functions of a low riser assembly, a jumper, and a PLET together, and can reduce managing costs and demolition costs by reducing a seabed structure.;COPYRIGHT KIPO 2015