Seaway7, part of Subsea7, has contracted Huisman to supply the entire monopile installation spread for its jack-up vessel Seaway Ventus, including a monopile gripper, an upending frame, and two sets of monopile storage cradles. 

Seaway7 Monopile Installation Spread

Huisman has modified its existing gripper design to meet Subsea7’s requirement to maximise the vessel payload. The redesigned gripper is lightweight, robust and stiff, and therefore capable of handling XXL monopiles. 

Meanwhile, the upending frame is adjustable in length and suitable for handling a wide range of monopiles. The storage cradles are outfitted with adjustable saddles to be able to store various monopiles sizes and can be expanded with an additional layer to double the vessel’s storage capacity. 

The equipment will be engineered, built, and installed at Huisman’s premises in Schiedam, the Netherlands. Delivery is scheduled for the fourth quarter of 2024. 

Subsea7’s heavy lift vessel Seaway Alfa Lift, meanwhile, is in transit to Europe, ready to join Seaway7’s fleet in the third quarter of 2023.