World's First Utilisation of Coiled Tubing to Dissolve Hydrate(s) in a FPSO Riser: Case History

摘要

This paper is a case history of what is believed to be the first ever utilisation of Coiled Tubing on a FPSO (Floating Production Storage Offloading) vessel to dissolve hydrate(s) in the riser. The main focus of this paper is to: 1) Publish actual job results pertaining to friction factors (drag co-efficient) of the coiled tubing inside the FPSO riser. 2) Highlight the innovative solution developed to allow for a possible emergency disconnection of the coiled tubing and CT Lubricator to allow the vessel to weathervane around the turret if required. 3) Explain the technique used to dissolve the FPSO Riser hydrate(s).