Offshore Oil and Gas Tension Leg Platform Jobs
A
tension-leg platform (gray) under tow with seabed anchors (light gray) held up
by cables (red) on left-hand side; platform with seabed anchors lowered and
cables lightly tensioned on right-hand side
Free
floating Tension leg platform Fig (1), construction is pulled down by the
tensioned wires (red) towards the seabed anchors Fig (2).
The tension leg platform-TLP is secured for always by the help
of tethers or tendons assembly at each of the platform's bends. A set of such tethers
is called a tension leg. A characteristic of the pattern of the tethers is that
they have comparatively excessive axial stiffness i.e, low elasticity, so that perpendicularly
all perpendicular movement of the platform is totally suppressed.
The tension leg platform-TLP or extended tension leg platform (ETLP) is a vertically moored
floating offshore platform generally used as an offshore oil and gas production
platform and is mostly appropriate for water depths between more than approximately
1000 ft or almost 300 metres and less than nearly 4900 ft or around 1500
metres. Application of tension-leg platforms has also been projected for wind
turbines.
This permits
the tension leg platform to hold
the production wellheads on platform deck which are coupled directly to the
subsea oil wells by inflexible risers, in place of on the seabed. This permits
an easier well formation and provides superior control over the production from
the oil and gas reservoir, and simpler access for down hole involvement
processes.
Bigger
tension leg platforms will usually
have a complete drilling rig on the platform with which to drill and intercede on
the wells. The smaller TLPs may have a work over rig or in some situations no
production wellheads in any way are positioned on the TLplatform.
The
deepest extended tension leg platforms-ETLPs
or tension leg platforms-TLPs calculated
from the sea bottom to the water level are :- Magnolia ETLP- Its overall height
is about 1,500 m or 5,000 feet i.e, approx 1,425 m or 4,674 ft, Marco
Polo TLP-1,300 m or 4,300 ft, Neptune TLP-1,300 m or 4,250 ft.
