FIELD: transport.
SUBSTANCE: invention relates to ''Spar''-type offshore production platform and method of displacing said platform. In compliance with first version, said platform comprises deck, hull with top part attached to said hull and axial central trunk extending to keel. Bearing buoy of pipelines is arranged in hull keel to be released therefrom. Said pipelines comprise top section secured in place relative to deck to extend through central trunk to bottom section secured in said bearing buoy and to be detached therefrom. Hull and top section of pipelines are selectively detached from buoy and bottom section of pipelines to propel hull and top section of pipelines to avoid collision with floe. In compliance with second version, proposed platform differs from known designs in that hull comprises smaller-diameter neck-like section to joint hull bottom to hull top sections and adjustable ballast mechanism to allow selective propulsion between ballastable bottom position whereat top waterline extends across hull top section and ballastable top position whereat bottom water line extends below bottom section. Method of propelling platform hull consists in connecting hull with sea bottom by multiple mooring lines to allow pipeline bearing buoy to be released from hull keel, lowering pipeline buoy with pipeline bottom section relative to the hull by means of cables, detaching cables from said buoy, detaching mooring lines, propelling hull and pipeline top section from buoy.
EFFECT: deep-water drilling in Arctic waters.
21 cl, 9 dwg
