An overview of Heavy lift jack up vessels

An overview of Heavy lift jack-up vessels

We design and construct heavy-lift jack-up vessels and liftboat for oil and gas maintenance markets and offshore winds. These self-elevating platforms will be delivered as a package or turnkey, in line with client specifications.

Optimized design

Our intensive operational ability permits us to optimize our jack-up designs, leading to a self-elevating platform with an efficient deck layout and the combination of hydraulic systems for jacking and lifting tools.

We are able to deliver each stationary and self-propelled vessel which will meet all dynamic positioning levels. Naturally, all our vessels suits, regulatory needs of the offshore wind farm sector and also the offshore oil and gas industries.

Flexible scope

We are also able to customize all areas of the heavy-lift jack-up vessel to fit your needs. As an example, the present design features a single acting pin-and-hole system, which might be changed to a continuous pin-and-hole system if preferred. We are happy to include your concepts into the design, so as to make sure that you get the most effective and cost-efficient vessel for your operation. We are not only versatile in our design approach, but conjointly within the scope of our delivery. We can provide everything from a basic design to a turnkey vessel, from our own shipyards or partner shipyards around the world, as well as elements of a third-party design. Anything is possible.

A jack-up vessel or a self-elevating unit is a kind of mobile platform that consists of a buoyant hull fitted with a variety of movable legs, capable of raising its hull over the exterior of the ocean. The buoyant hull allows transportation of the unit and all attached machinery to a preferred location. Once on location, the hull is raised to the desired elevation on top of the ocean surface supported by the ocean bed. The legs of such units are also designed to penetrate the ocean bed, may be fitted with enlarged sections or footings, or may be attached to a bottom mat.

A self-elevating jackup vessel unit could be a floating barge fitted with long support legs, which will be raised or lowered. The jack-up vessel is manoeuvred (self-propelled or by towing) into the location with its legs up and therefore the hull floating on the water. Upon arrival at the work site, the legs are jacked down to the seafloor. Then “preloading” takes place, where the load of the barge and extra ballast water are used to drive the legs firmly into the sea bottom so that they will not penetrate more where operations are carried out. After preloading, the jacking system is employed to lift the complete barge higher than the water to a determined height or air gap, in order that wave, tidal and its current loading acts only on the relatively slender legs and not on the barge hull.