Damen Shiprepair Amsterdam (DSAm) has completed a major modification and maintenance project on A2SEA’s jack-up vessel Sea Installer .
The principle scope of work involved the extension of the main crane boom, giving the Sea Installer increased reaching capacity. Other work comprised structural modifications as a consequence of the larger crane.
The crane boom was lengthened by inserting the new extension. The configuration of the upgraded crane is such that it can be operated in two modes: a long mode with the crane boom extension in place, and a short mode with the extension removed. The Sea Installer now has a flexible crane capacity of 900 tonnes in short mode and 700 tonnes in long.
Installing the larger crane on the Sea Installer had numerous implications on existing on board structures. The boom rest had to be replaced, which in turn necessitated additional modifications to the accommodation area. In order to house the main hook and auxiliary hook in both long and short mode, the existing auxiliary hook block pocket was replaced with a new construction that comprised one main and two auxiliary hook block pockets.
The bigger crane also needed a bigger winch: DSAm replaced the existing winch with a larger, 900-tonne capacity, winch. This included all the necessary adjustments of the electrical, hydraulic and cooling systems. The vessel’s main mast also needed structural modifications.
With the 132-metre long vessel at the yard, DSAm also executed various standard maintenance jobs such as painting, pipe renewal and thruster inspection.
A short video showing the upgrades is provided below.
Image and video: Damen