A support device configured to be positioned on a lifting vessel in order to support a topside of an offshore platform, the support device comprising: a main cylindrical casing having an upper opening, the main casing defining a main vertical axis, the main casing further defining an upper support rim, a reservoir located inside the main casing for holding a granular material or a fluid, the reservoir having a discharge opening for emptying the reservoir, a spring support slideably arranged within the main casing, the spring support resting on the granular material or the fluid and being movable from an upper position to a lower position in dependence on a filing degree of the reservoir, a spring device positioned on the spring support, a receptor support positioned on the spring device, the receptor support defining an upper surface, and a receptor device.