Sembcorp Marine has completed the world’s biggest semi-submersible crane vessel (SSCV), with a 220 by 102 meter deck area, for delivery to Heerema Marine Contractors in the coming months.
It has the strongest pair of revolving cranes of any vessel, each with a 10,000 metric ton capacity, capable of lifting 20,000 metric tons in tandem with a 129 meter lifting height.
The vessel will be deployed for offshore oil, gas, and renewable energy installation and decommissioning projects, such as installing and removing jackets, topsides, deep-water foundations, moorings and other offshore structures. Heerema has already secured contracts to deploy the vessel in various offshore energy developments, including: Leviathan topsides installation in the Mediterranean Sea; Tyra jackets and topsides installation and removal in the Danish North Sea; Brae B jackets and topsides removal in the UK North Sea; transportation and installation of the Hollandse Kust Zuid (HKZ) Alpha HVAC platform in the North Sea.
The large lift capacity will enable deployment of larger integrated structures, reducing offshore assembly work. Heerma intends to use the vessel to accommodate growth in the size of wind turbines and foundations in the offshore wind sector.
The vessel is also the first crane vessel with dual-fuel engines running on Marine Gas Oil (MGO) and Liquefied Natural Gas (LNG).
The vessel is named Sleinir after the Norse God Odin’s eight-legged stallion, and can accommodate up to 400 persons.
At its peak, the construction of Sleipnir at Tuas Boulevard Yard involved up to 3,700 workers in a single shift. The project has a current Lost Time Injury Rate (LTIR) of 0.35 per million man hours worked, a commendable safety performance.