MARINE SHIP FOR LAYING STEEL PIPES, FLEXIBLE ELEMENTS AND UNDERWATER STRUCTURE IN ARCTIC CONDITIONS Russian patent published in 2014 - IPC B63B35/03 F16L1/12 

FIELD: transport.

SUBSTANCE: invention relates to ship building, particularly, to marine ships intended for laying pipelines, flexible elements and underwater structures in arctic conditions by S- and J-processes. System of submersion of S-method allows laying the steel pipes and flexible elements. For this horizontal part of submersion system extends from ship fore to vertical line of upper deck intersection with aft transverse hold bulkhead. It comprises auxiliary service line to make stalks of two or three pipes and first main service line to assemble the first steel pipeline. Curved part of said path features radius making at least 0.7 of the ship maximum length and consists of open slip, tunnel closed at side and from above, aft stringer section turning about transverse axis located at least at the depth of 0.75 of ship draft in load waterline at, at least 0.15 of the ship maximum length. Midship coefficient at the area of said transverse axis does not exceed 0.45. This ship is equipped with the system of submersion by J-method of steel reinforced concrete and unconcreted large-diameter pipes (up to 1400 mm) and thickness of up to 27 mm, underwater structures and carousel for flexible element. Forked aft accommodates engine and boiler compartment connected with aforesaid submersion path with equipment loading/unloading hatches, after compartment with living and service rooms, takeoff-landing platform with hangar for helicopter and drone, and detachable modules to service underwater TV-controlled apparatus, divers complex and that of hyperbaric welding. Positioning system comprises after fore equipment of anchorage and system of dynamic positions. Besides it is equipped with pontoons and crane for mooring and load transfer operations in ice.

EFFECT: higher efficiency and safety.

7 cl, 7 dwg