DSME awards Ulstein unit contract for Heereman vessel engineering"


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October 6, 2010

Ulstein unit gets DSME contract for Heerema vessel work

Ulstein Group's Netherlands based design company, Ulstein Sea of Solutions (USOS), has been awarded a contract for further engineering of a deepwarer construction vessel for Heerema that is to be built by South Korea's Daewoo Shipbuilding and Marine Engineering.

In February 2010, USOS was contracted by Heerema to design the new vessel. In mid July, Heerema and DSME signed a letter of intent that, on August 24, was turned into a building contract with DSME for the design, construction, testing, commisioning and delivery of the ship.

"Designs for deepwater construction vessels are an important focus area for Ulstein Group, and we are very pleased that Heerema selected us for designing this state-of-the-art vessel", says Tore Ulstein, deputy CEO of Ulstein Group.

The self propelled DP3 Deepwater Construction Vessel is a customized version of the Ulstein SOC 5000 vessel design. The Heerema vessel features a revolving heavy lift capability of 4,000 t, deepwater lowering equipment up to 3,500 ms and a pipelay tower for J-lay and reel-lay operations via a moonpool. The hull configuration is specially designed for fast transit speeds and optimum motion characteristics in operation. The vessel is DP3-class equipped with 2 x 6500 kW and 4 x 3200 kW thrusters allowing for a transit speed of 12-14 knots.

"Heerema's choice of design proves that our inhouse developed SOC 5000 design is a solid base to meet clients project requirements", says Bob Rietveldt, managing director at USOS He adds that success of the project is thanks to the project team, managed by Edwin van Leeuwen, which was able to provide the design in the record time frame required by Heerema to start tendering for the construction of the vessel,"

DSME has now signed a contract with USOS for further vessel engineering and integration of its Huisman-supplied mission equipment.

Huisman is to design, construct and install a 4,000 t Offshore Mast Crane and a pipelay tower for both J-lay and Reel-lay operations in ultra deep water. Installation of equipment is scheduled for 2012/2013, partly at the DSME yard in South Korea and partly at the Huisman quay in Schiedam, in the Netherlands.

The heavy lift crane will have a revolving lift capacity of 4,000 t. The Mast Crane design was selected for this vessel because of the small footprint and small construction weight of the crane. The crane will be constructed at the Huisman facility in China and installed onboard the vessel at DSME in 2012

The J-lay tower is installed over a moonpool and is designed for both J-lay and Reel-lay operations. For reel-lay, the tower features two pipe tensioners of 400t capacity each. The pipe is spooled on reels which can be lifted on board offshore by the vesselŐs own crane.

This concept is an innovation in rigid pipelaying on a large scale. It allows for onshore spooling of reels while offshore pipelaying continues, eliminating the need for a large spool base,The reels can be easily removed to free up deck space when operating in J-lay or crane barge mode. Additional equipment to be delivered by Huisman includes moveable pipe reels, PLET handling, A&R winches and a heave compensated deep water lowering system. All pipelay equipment will be constructed and installed at Huisman Schiedam where the vessel will arrive around December 2012.

Main dimensions of the vessel are:

Loa: 211.5 m

Lpp: 197.6 m

Beam (molded): 46.2 m

Depth (molded): 16.1 m

Operating draft: 11.0 m

Service speed: 12-14 knots

Installed power: 6 x 7,370 W

Complement: 305 people

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