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Tank (“Soft Tank”) – contains the fixed ballast and acts as a
natural hang-off location for export pipelines and flowlines .
a b
a – construction; b – transport position
Figure 2.25 – Truss SPAR
Shell’s most recent Truss SPAR broke the deepwater
record and will be operational in 2010. Truss SPARs are
characterized by the tubular members that provide a connection
between the hard tank and the keel. The truss system also support
to the heave plates which reduce improve stability by reducing
heave.
The Cell SPAR was also designed by Kerr-McGee in the
Red Hawk project. Red Hawk was installed in the Gulf of Mexico
and made operational in 2004. Cell SPARs have several design
features including. The Hard Tank is made up of 6 cylindrical
tubes that surround a seventh central tube.
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