ACE Overboarding System package for Quad 204 Project

ACE Winches completed a scope of work as part of a subsea infrastructure project in the Loyal field, west of the Shetland Islands. Quad204 is the redevelopment of the Schiehallion and Loyal fields, located 175 km west of Shetland and 15 km north of the Foinaven field.

The complete project will see an existing floating production storage and offloading (FPSO) vessel replaced with a larger, purpose-built FPSO to accommodate new field tie-ins.  The development of additional wells and the installation of new subsea infrastructures in neighbouring fields are also planned.

Challenged by limited deck space, ACE developed a package that incorporated the Hydraulic Drum Winch, with a safe working load of 150te across all layers, an overboard system and spooling gear into the winch base frame. The winch package included closed loop hydraulic power units, located nearby.

A custom-made compact winch was designed to suit the limited space and meet the required performance characteristics for riser installation, while the overboard system provided access to the tower, with ladders and walkways included.