Patent ID: 8225732
Filing Date: 2012-07-24
Classification: B63B

Abstract:
1. A method for conversion of a tanker to a floating production ship with a geostationary anchoring and riser arrangement, wherein a tanker is provided with a hull containing tanks, the method comprising: cutting out a vertical opening in the hull, in one or more of the tanks, and in structural elements in the hull; providing a cassette having structural elements comprising vertical plate elements and a vertical, through-going shaft, wherein the vertical plate elements comprise first plates, second plates, and third plates, wherein the first plates are designed to fit and connect with the cut structural elements in the vertical opening in the hull such that the cassette forms part of the hull, the second plates attach to the through-going shaft, and the third plates attach the first plates and the second plates, and the vertical, through-going shaft has a lower section and an upper section wherein the upper section has a larger diameter than the lower section; inserting the cassette in the cut-out vertical opening in the hull and connecting the vertical plate elements of the cassette with the cut structural elements in the hull, thereby forming a structure incorporated in the hull, which structure forms part of the strength of the surrounding hull; and rotatably mounting a body about a vertical axis in the vertical shaft.