20,000 tonne heavy lift vessel completed
By Alex Dahm18 June 2019
SembCorp Marine in Singapore has finished building the 20,000 tonne capacity SSCV Sleipnir for Heerema Marine Contractors. The world record-beating crane ship is now afloat and has been christened. It is 220 metres long by 102 metres wide and carries a pair of turret cranes each rated to lift 10,000 tonnes, which can work in tandem or individually.
The revolving cranes built by Huisman will lift their 10,000 tonne maximum load to a radius of 48 metres. Capacity is still 7,000 tonnes at 62 metres radius and 4,000 tonnes at 82 metres. Maximum radius is 102 metres. Even the auxiliary hoist lifts 2,500 tonnes to 60 metres radius. Also on board is a pedestal mounted lattice boom crane lifting 70 tonnes at a 12 metre radius. Up to 400 people can be accommodated. Power is from 12 engines which can run on either low sulphur marine gas oil (MGO) or liquified natural gas (LNG). Each engine is rated at 8 MW, giving a combined total of 96 MW. They are grouped three each in four engine rooms.
Heerema will use Sleipnir all over the world to install and remove jackets, topsides, foundations and other structures for the offshore oil and gas industry. Contracts already signed include installation of the Leviathan topsides in the Mediterranean Sea, installing and removing Tyra jackets and topsides in the Danish North Sea, and removing the Brae B jackets and topsides in the North Sea off the UK coast. Wind turbine installation will be another application for Sleipnir where it will be able to make full use of its 175 metre lifting height.
The cranes have a lifting height of 175 metres making them suitable for wind turbine installation work
Commenting on his new world record-holder, Pieter Heerema, Heerema Marine Contractors chairman of the board, said, “I am immensely proud that Heerema Marine Contractors is again taking things further with the introduction of our new semi-submersible crane vessel. Sleipnir scores several firsts in the industry: It is the largest crane vessel yet built; it has the strongest pair of revolving cranes; and it’s also the world’s first crane vessel with dual-fuel engines running on MGO and LNG, dramatically reducing harmful emissions. Sleipnir’s innovative capabilities will place Heerema even firmer at the forefront of developments in the offshore oil, gas and wind energy industry for both installations and decommissioning.”
Sleipnir will now leave for sea trials before delivery to Heerema.
The crane ship is 220 metres long by 102 metres wide
The Sleipnir has dual-fuel engines running on MGO and LNG