THE SUCTION MOORING, A NEW TYPE OF OFFSHORE SINGLE POINT MOORING

A newly developed mooring system, the suction mooring, permits the mooring of vessels in wave heights to at least Hs = 8m. The principle of the mooring consists of using the hydrostatic pressure available at the keel of the vessel to press a mooring buoy onto the bottom and holding the vessel by the resulting friction. The action of the mooring buoy is similar to that of a suction cup. The pressure above the buoy is lowered and maintained by means of pumps aboard the vessel. This paper reports on model tests carried out to prove the feasibility of conducting the mooring operations in high waves. Three different configurations of the mooring buoy were tested. For two of the configurations it was found that the mooring process could be carried out safely in all wave heights tested ie up to Hs = 7.7m. The impact upon offshore operations of this capability was investigated by performing Monte Carlo simulations on a hypothetical oil field in the centre North Sea and in the northern North Sea. The suction mooring system was compared to two other high performance mooring systems. The results show that weather related oil field shut-ins are reduced an order of magnitude by application of the suction mooring compared to the other systems simulated.

  • Supplemental Notes:
    • OTC 95, 27th Annual Offshore Technology Conf; 1-4 May 1995; Houston, Tx, USA. Procs. Vol 2, p 177 [14 p, 4 ref, 7 tab, 17 ref]
  • Authors:
    • Korsgaard, J
    • Hutter, L
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00727470
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Nov 1 1996 12:00AM