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MOORING SYSTEM

The TLP mooring system consists of the following:
Mooring templates are provided for each comer of the TLP
structure. Each template carries landing receptacles for anchor
piles, tension-leg assemblies, and a central running string. Each
template is equipped with a template leveling system.
An anchor connector lower flex assembly is located at the
bottom of each tension leg. This assembly provides an automatic
mechanical latch to secure each tension leg to the mooring
template. The built-in flex element allows angular movement of
each tension leg relative to the latch mechanism.
Tension leg joints are run and latched at each comer of the
TLP structure and consist of heavy tubulars with a mechanical
latch at the bottom. After latching onto the mooring template, the
legs are tensioned adequately to pull the TLP down into its final
position.
A crossload bearing/upper flex assembly at the top of each
tension leg is located in the individual mooring tunnel area. This
flex assembly allows angular movement of the tension leg below
the TLP and also takes up any side loads imposed by TLP
movements.
Along with the fact that foundations and risers comprise
only a small percentage of total costs, the extensive use of standard
equipment and techniques gives the tension-leg platform the
ability to operate in water depths well beyond those possible with
existing technology. The significant cost advantage is apparent.
Cost reductions may also accrue by reducing the number of
tubulars required for each well. The TLP concept may well
provide economical feasibility and impetus for development of
deep-water marginal fields.

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