Drydocks World has completed the conversion of former drill ship Yan into Boskalis’ new crane vessel Bokalift 2. The vessel is now on its way to China to receive its 4000-metric-tonne Huisman Offshore Mast Crane.

The Bokalift 2 has been converted in preparation for carrying out a variety of offshore operations. Its maiden project will be the transport and installation of wind turbine foundations for the Taiwanese Changfang and Xidao offshore wind farm.

The vessel conversion requred 9000 tonnes of steel, according to Drydocks. Steel blocks were installed on both sides of the vessel to increase stability and a new work deck was installed. The project was delivered using detailed engineering, supply of steel, piping and electrical bulk material, construction, and installation of client issued equipment until mechanical completion.

The Bokalift 2 will have 7500 m2 of free deck space and will be able to accommodate 150 persons. It was supposed to be delivered by the end of 2021, but it appears the project has suffered some delays.

Also read: Conversion of Boskalis’ new crane vessel BokaLift 2 underway

Offshore Mast Crane

The Huisman 4000-tonne revolving Offshore Mast Crane that will complete the conversion project is capable of lifting structures more than 100 metres high. A fly jib allows lifting of smaller components up to a height of 125 metres above deck. The configuration of the hoisting tackles is such that the crane is capable of lifting large jackets and of upending long (mono)piles from a horizontal to vertical position. The Huisman mast cranes have a small footprint and no tailswing, which leaves maximum space on the deck of the vessel for payload.

In 2017, Boskalis also converted one of its semi-submersible heavy lift vessels into a DP2 crane vessel, the Bokalift 1. This vessel has a 3000-tonne crane. 

Also read: Bakker Sliedrecht provides electrical conversion crane vessel Bokalift 2