METHOD AND SYSTEM FOR LOADING A TANKER WITH CRUDE OR GAS FRO M A SUBMARINE TERMINAL

摘要

A method and a system for loading a tanker (3) with oil or gas from a submarine conduit (1), wherein the tanker is positioned dynamically above a coupling structure (3) connected to the conduit (1), and wherein a riser pipe (32) is lowered from the tanker, the lower end of said riser (32) carrying a coupling means (211) which is coupled to the coupling structure (3). The lower end of the riser (32) is positioned dynamically during the lowering and coupling operation by means which are monitored by the dynamic positioning system of the tanker, the position of the lower end of the riser being controlled by the dyamic positioning system of the tanker during the controlled lowering of the riser, and the lower end of the riser being precision regulated by a precision regulation system which is integrated in said dynamic positioning system. The overall dynamic positioning system also includes a heave compensation system (33, 38) which aside from being used during the loading operation, can also be used during the initial lowering and the final coupling phase of the riser coupling means (211).