ICE-RESISTANT OFFSHORE FIXED PLATFORM Russian patent published in 2011 - IPC E02B17/00 

FIELD: construction.

SUBSTANCE: platform comprises a fixed ice-resistant caisson, a lower bottom and an upper support boards and side walls, reservoirs for storage of well products and process liquids, an upper structure installed on the upper support board, made of technological and functional units, an ice-breaking apron installed along the whole perimetre of the external surface of the caisson and a skirt arranged in the lower part of the caisson. The caisson is arranged in the form of a truncated regular tetrahedron, formed with lower bottom and upper support boards, shaped as an equilateral triangle, and side walls installed at the angle of 60° relative to the bottom board. Inside the caisson there is the second bottom, which separates its inner cavity into two premises. Between the second bottom and the lower bottom board there are cisterns of the main ballast, reservoirs for storage of well products and process liquids, separated between each other with inner partitions. The ice-breaking apron is installed at the distance equal to 1/2 of height between the lower surface of the upper board and the waterline level. At the level of the second bottom on the outer surface there is a horizontal pipe with heating, to melt ice accumulated around the platform. Along the whole perimetre of the caisson under the upper plate there are additional gussets installed to prevent the upper board against sagging. On the upper structure there is a structure fixed, designed to illuminate and heat the functional units. The caisson is oriented at the field in accordance with the dominant drift of ice fields, always at an angle to opposite approaching ice.

EFFECT: improved operational characteristics, manufacturability and strength of the structure, efficient resistance to ice fields.

10 cl, 5 dwg