Abstract: A method and apparatus for positioning in the sea a buoyant platform having a plurality of legs which are movable relative to the platform. One or more tubular elements are detachably suspended from one or more of the legs, such that upon lowering of the legs relative to the buoyant platform, the tubular elements come into contact and rest on the sea bottom. The tubular elements are preferably detached from the legs and a filler material such as gravel is filled into the open ended tubular elements, thereby forming one or more foundations upon which the legs can rest so that the platform can be jacked upwardly relative to the legs and extend above the sea level.

Abstract: A subsea storage structure for treatment and storing drill cuttings from drilling operations in the sea bottom includes a generally closed container or tank suitable to be positioned on the sea bottom near the drilling site, which tank is provided with an upper inlet for supply of drill cuttings, and an output to ambient water for water which is displaced during the supply of drill cuttings. The tank contains arrangements for cleansing of the drill cuttings and storage of accumulated oil, fluids and other constituents separated from the drill cuttings, and structure for extraction of the accumulated oil, fluids and other constitutents lighter than water.