A RISER

摘要

A riser and a method for reducing the risk of failure of a riser system comprising a riser (100) arranged between an installation and a subsea well the riser (100) having a bore (116) for conveying fluids therebetween, the method comprising the step of providing at least one vortex shedding member (111) in said bore (116) of said riser (100) and flowing the fluid between the subsea well and the installation.