| 摘要 |
A single point mooring terminal or system which can be used for ship mooring and cargo transfer, which includes a spar type floating buoy combined with a tethered underwater buoy concentric to the spar buoy. The underwater buoy is in the form of a collar which is mounted around the spar buoy and is completely submerged and anchored to the seabed by collar mooring lines. The spar buoy is free to move vertically within the collar, but is restrained from lateral and rotary movements by the collar. Thus, the collar restrains lateral movement of the spar buoy while introducing a minimal tilting moment. A mooring swivel can be mounted on the collar of the underwater buoy, and to which the bow mooring line of a ship can be attached to permit the ship to swing freely around the buoy system. A leak-proof skirt is connected to the bottom of the spar buoy, and is in the form of an inverted bucket so that when a fluid having lower density than seawater, such as air, is introduced into it, seawater is forced out through the bottom and an air pocket is provided for containing motion compensators connecting the pipe risers from the seabed pipeline to piping within the buoy so that the pipe compensators are not immersed in seawater. The air filled skirt also allows personnel to enter it through an airlock from the spar buoy for inspection and maintenance purposes.
|
