MARINE SUBMERGED-SURFACE STRUCTURE Russian patent published in 2001 - IPC

FIELD: well-boring during development of marine and gas fields under severe climatic conditions. SUBSTANCE: structure has submerged bottom section and surface platform section provided with float. Sections are factory-fabricated items, separately transported for installation on side. Sections are joined together in the course of work and separated during ice conditions; surface platform section is conveyed to safe place. Bottom section is made in the form of supporting block composed of cylinder with inner space and dome; bottom has external case. Space between case and cylinder is filled with high-pressure water. Structure has members for cross coupling of case with central supporting member made in the form of radial brace. Pressure is built up by pressure booster which has piston with ram fastened through sealed joints in common cylinder automatically controlled by hydrostatic pressure of sea-water and transferring pressure to water through water layer, sealed membrane , and check valve. Production facilities are installed in bottom section; additional assemblies and retail materials are arranged on platform section. EFFECT: provision for mobile assembly and disassembly of factory-fabricated structure components. 3 cl