COSCOL orders two large semi-submersible heavy lift vesselsVessel & ROV News // November 8, 2007
COSCOL Shipping Co Ltd of Guangzhou, China has signed a contract for two large semi-submersible heavylift newbuildings with Guangzhou Shipyard International (GSI) in China.
This is the second contract signed as part of COSCOLís newbuilding programme for the semi-submersible transport and installation market.
The vessels will be delivered in September 2010 and March 2011. The purpose-built heavy lift vessels have a large open cargo deck measuring 177m x 43m, capable of transporting the largest semi-submersible and jack-up rigs currently in the market.
The vessels are highly versatile and can handle a wide range of cargoes such as offshore structures, drilling rigs, topsides, jackets, FPUs, FPSOs, barges and other floating and non-floating structures.
Capable of stern or side loading, the new ships can to submerge their main cargo decks up to a depth of 13m in order to load large floating structures. Ballasting will be controlled by large capacity compressors which will enable operations to be completed in just over four hours.
The propulsion system is diesel-electric and will provide a service speed of 14 knots. Prime design considerations of safety and reliability resulted in double separate redundant propulsion (with Class notation RPS) and ballast systems.
COSCOLís new vessels will be particularly suitable for the float-over installation of large topsides thanks to their ample strength, stability and ballast capacity. The aft buoyancy casings can be easily and quickly relocated using the vesselís own equipment.
The commercial management and marketing of the vessels will be handled under exclusive agreement by Houston/Rotterdam-based NMA Maritime.
The COSCOL newbuilds will have a deadweight of approximately 50,000 tonnes, length overall of 216.7m, length between perpendiculars of 212.1m, breadth of 43.0m, loaded draft of 9.85m, hull depth of 13.0m and cargo deck measuring 177.6m x 43.0m.