CIMC Raffles has chartered one of its semi-submersible accommodation and heavy lift crane vessels to Chinese offshore wind contractor Huadian Heavy Industries for use as an offshore wind farm installation vessel.

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The CIMC Gretha has been renamed Hua Dian Zhong Ji-01 and is now in Guangdong to support offshore wind farm installation activities, having arrived from Singapore where the unit underwent a crane load test.

Prior to this the unit transited from Curacao following a thruster change out.

The workscope covers the installation of offshore facilities for a 400-megawatt wind farm off Jieyang city in Guangdong province.

The Class 3 dynamically positioned semi-submersible platform completed a multi-year charter with Petrobras in Brazil in 2018 before being stacked. It was then towed to China earlier this year.

The self-propelled unit is equipped with two 1800-tonnes Huisman cranes and has a deck area of 2000 square meter.

CIMC Raffles is also working with Huadian to charter an offshore wind turbine installation vessel it is building in Yantai.

The unit, built for compatriot offshore wind contractor Boqiang Heavy Industry Group, will be delivered in the first quarter of 2023.

The vessel, with a dynamic positioning 2 (DP2) system, is designed to work in water depths of 65 metres, although this can be increased to around 80 metres if the legs are lengthened from 120 metres to 136 metres.

This vessel will be equipped with a giant crane — to be supplied by Husiman that will have lifting capacity of 2200 tonnes — a rack and pinion jacking system that will enable the vessel to operate in wave heights of 2.5 metres.

The deck space will be able to accommodate four sets of 12 MW turbines or eight sets of 8MW turbines.

The recent charters are based on a strategic co-operation agreement CIMC Raffles signed with Huadian late last year to jointly work on making use of offshore facilities stacked at CIMC Raffles for offshore wind installation jobs when the offshore oil and gas contracting market is depressed.

(This article has been amended to correct details of the vessel's movements since ending its charter with Petrobras.)