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SSCV Thialf

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File:Balder Holstein Thialf.JPG
Balder, Holstein and Thialf

The SSCV Thialf is a Semi-Submersible Crane Vessel. It was constructed in 1985 as DB-102 for McDermott by Mitsui Engineering & Shipbuilding Co., Ltd.. In 1997 it was taken over by Heerema after discontinuation of their joint venture with McDermott, HeereMac.

The Thialf has two cranes with a maximum lifting capacity of 14,200 metric tons, making it the largest crane vessel in the world[1].It is equipped with a class III Dynamic Positioning system for position keeping in deep waters. For position keeping, the Thialf is fitted with six 5,500 kW retractable azimuthing thrusters. For shallow waters there are 12 Flipper Delta anchors, 22.5 mT, with 2,500 meter, 80 mm mooring wire.

The hull consists of two floaters with four columns each. Transit draught is ± 12 meter. For lifting operations it will normally be ballasted down to 26.6 meters. This way the floaters (with a draught of 13.6 meters) are well submerged to reduce the effect of waves and swell.

It is able to accommodate 742 persons.

Particulars

Thialf in Norwegian fjord with Fulmar SALM (Single Anchor Leg Mooring) buoy.
Length overall 201.6 meter
Breadth 88.4 meter
Max. draught 31.6 meter
Depth to workdeck 49.5 meter
Height crane above workdeck

(at minimum radius)

144.0 meter
Lightship weight 72,484 mT
Max. displacement 198,750 mT

Remarkable projects

File:Benguela Belize piles.jpg
Thialf lifting a foundation pile for Benguela Belize
  • Installing the pylon of the Erasmus Bridge in 1995.
  • Decommissioning of the Brent Spar in 1998.
  • In 2000 it set a world record of 11,883 mT by lifting Shell's Shearwater topsides[2].
  • In 2004 it installed the topsides on BP's Holstein, the worlds largest spar. The lift was a record for the Gulf of Mexico: 7,810mT.
  • In 2005 it installed the heaviest single piece foundation piles: 2.74 meter diameter x 190 meter long, weighing 818 mT each for ChevronTexaco's Benguela Belize compliant tower.

See also

References

  1. ^ "American Bureau of Shipping Record, Thialf".
  2. ^ "Met Office, NWP model data offshore: helping to establish a new world record".