Fibre-rope for greater depths

摘要

MacGREGOR has developed an ultra-deepwa-ter lifting system using fibre-rope technology that will enable its standard offshore cranes to reach significantly deeper depths than previously possible using a traditional system.rnThe ultra-deepwater lifting system, called Hydrama-rine, uses a side-mounted frame fixed onto a vessel. This allows the crane to lower a load to a depth of 1000m, after which the load is transferred to a straight fibre rope and the crane hook is returned to the surface, reattached to the upper end of the fibre rope, and then a new length of up to 1000m is deployed. This hook-moving sequence can be repeated until the desired depth is reached. As landing heave compensation is enabled through a winch operation using traditional steel cable, spooling andrnbending the critical fibre rope is avoided. Eliminating these strains on a fibre rope is essential as it is much more fragile and vulnerable to mechanical stress than traditional steel cable.