Ulstein Introduces New Subsea Vessel For Offshore Wind and Oil & Gas Markets

Ulstein, a Norwegian shipbuilder and designer, has designed an innovative subsea vessel that enables floating, fixed installations within the offshore wind & oil and gas sector.

Ulstein explained that the SX232 is built on three principles: an improved hull design focused on the advanced Ulstein Twin X-Stern, an intelligent power as well propulsion system designed to reduce energy consumption, particularly during DP operations, and an integrated energy recovery system that applies waste heat in machinery systems (cooling water and exhaust).

The vessel has been designed to operate on a range of fuel types. It has a battery energy storage system for peak shaving and a spinning reserve.

The vessel’s forward section can accommodate 130 and includes two remotely operated vehicle (popular as ROV) hangars. A moonpool has been positioned at the rear of the accommodation block, further complemented by a deck size of 2,000 m².

Ulstein explained that the flat deck design enhances the vessel’s adaptability, permitting several operational setups to suit a range of maritime tasks. The basic platform has been wonderfully configured with a 250-ton offshore crane.

However, it can also support a larger crane measuring about 400 tons. With upgraded crane capacity, the vessel may support the installation of suction anchors for floating offshore wind farms. SX232 can also be used for inter-array cable-laying operations, which include a 5,000-ton carousel on deck and two cable-lay spreads.

The vessel has a further 3,500-ton carousel beneath the deck, bringing the total cable capacity to approximately 8,500 tons. Inter-array installations in floating wind require a particular setup. The firm mentioned that a J-lay system with a tower over the stern will be needed here.

Reference: Offshore Energy

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