MANUFACTURING OF A SUBSEA PIPELINE AND SPOOLING SAID PIPELINE ONTO A REEL OF A PIPELAYING VESSEL AT A SPOOLBASE

摘要

A method for manufacturing a subsea pipeline (1) and spooling said pipeline onto a reel (101, 102) or a carousel of a pipe laying vessel (100) at a spool base. The method comprises connecting pipes (2) end-to-end at a pipeline assembly station (10) to form a continuous pipeline stalk (1), said pipeline having an elastic limit. The continuous pipeline stalk is spooled directly from the pipe assembly station onto a floating intermediate pipeline storage device (20) that is adjacent the pipeline assembly station and the stalk is temporarily stored thereon. The pipeline stalk is later spooled from the floating intermediate temporary pipeline storage device onto the reel of the pipe laying vessel. The floating intermediate pipeline storage device is a carousel (30, 31) pipeline storage device which has an annular floating base that is assembled from multiple barges (25) which are interconnected in an annular array and having an above waterline carousel.