HEAT-INSULATED COLUMN Russian patent published in 2004 - IPC

FIELD: oil and gas producing industry. SUBSTANCE: proposed heat insulated column includes coaxially arranged pipes with heat insulating material and rests in between, inner pipes connecting units and outer pipes connecting units including male and female parts and sealing member placed in between. Said sealing member is fitted in ring groove made in inner bore of female part over connecting threaded unit between male and female parts of outer pipes of column. Male parts of outer pipe are provided with outer bead over connecting threaded unit of diameter equal to diameter of mated female part of inner bore of outer pipe. EFFECT: simplified design, improved conditions of mounting. 2 cl, 4 dwg