Mooring line

Abstract

The present invention relates to a mooring line comprising synthetic fibers, said mooring line having a length of at least 800 meters and being suitable to secure in place a water floating system, whereby the mooring line comprises at least a first and a second module, wherein at least the first and the second module have different compositions. The line according to the invention is suitable for use to secure in place a water floating system. The water floating systems may be a system floating on water or a system buoyant in water at a certain water depth, suitable examples including floating production storage and offloading vessels, spar buoys, semi-submersible or other hydrocarbon storage and/or processing and the like.

1 . A mooring line comprising synthetic fibers, said mooring line having a length of at least 800 meters and being suitable to secure in place a water floating system, characterized in that the mooring line comprises at least a first and a second module, wherein at least the first and the second module have different compositions of synthetic fibers. 
   
   
       2 . The mooring line of  claim 1 , characterized in that said modules having a length of at least 100 meters. 
   
   
       3 . The mooring line of  claim 1 , characterized in that said first module comprises polyester fibers. 
   
   
       4 . The mooring line of  claim 1 , characterized in that said second module comprises high performance polyolefin fibers as second fibers. 
   
   
       5 . The mooring line of  claim 1 , characterized in that said first module comprises at least 51% by weight first fibers and said second module comprises at least 51% by weight high performance polyolefin fibers as second fibers. 
   
   
       6 . The mooring line of  claim 5  characterized in that said first module comprises at least 60% by weight first fibers. 
   
   
       7 . The mooring line of  claim 5  characterized in that said first module comprises at least 95% by weight first fibers. 
   
   
       8 . The mooring line of  claim 5  characterized in that said second module comprises at least 60% by weight high performance polyolefin fibers as second fibers. 
   
   
       9 . The mooring line of  claim 5  characterized in that said second module comprises at least 95% by weight high performance polyolefin fibers as second fibers. 
   
   
       10 . The mooring line of  claim 1 , characterized in that said first module comprises at least 51% by weight polyester fibers and said second module comprises at least 51% by weight high performance polyolefin fibers as second fibers. 
   
   
       11 . The mooring line of  claim 10 , characterized in that the high performance polyolefin fibers are ultrahigh molecular weight polyethylene (UHMWPE) fibers. 
   
   
       12 . The mooring line of  claim 3 , characterized in that the polyester fibers have a tensile strength of at least 0.6 GPa and an elongation to break of at least 3%. 
   
   
       13 . The mooring line of  claim 11 , characterized in that the UHMWPE fibers have a tensile strength of at least 1.5 GPa and a stiffness of at least 35 GPa. 
   
   
       14 . The mooring line of  claim 4 , characterized in the length of the first module comprising polyester fibers is at most 2000 meters. 
   
   
       15 . The mooring line of  claim 11  characterized in that the ratio between the length of the module comprising polyester fibers and the length of the module comprising UHMWPE fibers is at most 90%. 
   
   
       16 . The mooring line of  claim 4  characterized in that the free end of the module comprising high performance polyolefin fibers is connected to the anchor that will provide the anchoring point on the seabed.