Riser for great water depths

摘要

A riser connects a stationary submerged structure such as an offshore oil well head with a caisson of positive buoyancy anchored to the water bottom. The riser comprises continuous guide means extending from the caisson to a certain distance above the submerged structure and housing, with a clearance from the bottom transfer lines connecting said structure to the caisson, and holding means joining together said guide means and at least one anchoring line of the caisson.