METHOD OF RAISING SUNKEN OBJECT Russian patent published in 2003 - IPC

FIELD: methods of raising sunken objects. SUBSTANCE: proposed method includes connection of sunken object with partially sunken pontoons by freezing them together due to delivery of cryogenic fluid to tubular heat exchangers attached to pontoons and placed on parts of object which have lost their tightness followed by direction of gas formed due to gasifying of cryogenic fluid to hull of sunken object and to pontoons for forcing-out water in volume sufficient for obtaining zero buoyancy of sunken object and submersible part of ship-raising facility+ADs- then sunken object is raised to water surface by means of floating cargo-hoisting gears at maintenance of zero buoyancy and water is finally forced out of sunken object and pontoons by gasified cryogent or compressed air. Proposed method makes it possible to control rate of raising at maintenance of required list and trim reducing dynamic loads on object at surfacing. EFFECT: enhanced efficiency and reliability. 1 dwg