Mooring | Materials | Application | Program | Links | ||||
|
||||||||
|
A synthetic fiber insert will transfer mooring forces without changing the catenary. In shallow waters, an all chains system works well but as the water depth increases the weight of the chain becomes excessive and it tends to hang directly down from the rig. By inserting a synthetic fiber line the mooring stiffness increases, without a weight penalty. Thus no modifications to the riser system are necessary when going to deeper water.
Depending on the exact design it is even possible to improve the restoring characteristics. This will extend the weather window for drilling time. As the synthetic fiber lines are neutrally buoyant they can be pre-installed with only a small surface buoy, thus reducing hook-up time.
When designing a multi-component mooring line, it is common use to have a steel chain part at the beginning and at the end of the mooring line. The steel chain at the bottom will prevent that the sand particles in that areas will find their way into the fiber rope, which obviously will lead to extra wear and tear. On the top of the line, the steel chain is more common because a steel chain can resist the use of a chain winch.
|
|
||||||
|
Inert Catenary
|
|||||||
Examples | ||||||||
|
|
|||||||
|
FPSO
|
|||||||
Copyright DWM2. All Rights Reserved. | ||||||||