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Ace Winches has chosen to use Hagglunds Compact hydraulic motors in its new anchor mooring winch.

Hagglunds said that its Compact motors have an excellent power-to-weight ratio and a performance range from low to very-high power with high efficiency, making them a suitable choice for marine winches.

Hagglunds has had a good relationship with Ace Winches since chief executive Alfred Cheyne started the business in 1993.

In the final stage of a particular contract awarded by Shell UK, Ace Winches completed the design, manufacture, installation and commissioning of a bespoke 200-tonne SWL replacement anchor mooring winch to lift and tension the FPSO Anasuria mooring lines.

The Anasuria was the first purpose-built floating, production, storage and offloading (FPSO) vessel to be constructed for Shell UK Exploration and Production in the UK and is located 100km off the coast of Aberdeen in the North Sea.

Being an FPSO, the vessel has a turret system that anchors the vessel to the seabed via chains and anchors.

The vessel then rotates around the turret, inside which the anchor handling winch is located.

Ace Winches was contracted to manufacture a winch for tensioning the anchor chains and, due to the constraints of the installation, a complete logistics and ‘cradle to grave’ approach had to be undertaken.

Basic design problems were that the existing space on the vessel was very small for such a large pull capacity winch.

A detailed design study utilising Ace standard drive concept gearboxes was carried out to achieve the duty in such a confined space.

These drive units are based around the Hagglunds Compact high-torque, low-speed, DNV-approved motor and brake.

Due to the logistical and physical positioning constraints, the winch had to be designed, manufactured and fully function tested, then stripped down into eight boxes for shipping to the vessel.

Size of parts for assembly was very important as there was no crane facility for assembly of the winch into the turret.

All winch components were moved from deck to their location through narrow corridors using chain blocks.

Tidal conditions played a crucial role in ensuring the turret was in a safe loading position for transferring of the winch parts.

Precise load control was also paramount with high equipment classification FPSO standards.

Hagglunds offers hydraulic motors and drive systems for almost any marine segment.

Hagglunds Drives

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