METHOD AND DEVICE FOR OIL WITHDRAWAL FROM POOL Russian patent published in 2002 - IPC

FIELD: methods and devices for oil withdrawal and its primary processing at place of oil production for in-house needs. SUBSTANCE: heat-carrying pipe is installed into casing string, and it is provided with, at least, one seal. Injected under pressure into oil producing formation through well are exhaust product of combustion of hydrocarbon fuel of engine of rotary-cylinder type. Force pump is used in form of, at least, one rotary-cylinder force pump. Combustion products of rotary-cylinder engine and/or force pump are injected into oil-bearing formation in form of gases or vapor-gas mixture through heat-carrying pipe heat-carrying pipe is sealed by seal when gas or gas mixture is supplied under pressure to seal. Said pipe is subjected to heat-air insulation. Device for oil withdrawal from pool includes engine producing hydrocarbon fuel combustion products, at least, one injection well and, at least, one producing well, and force pump for supply of exhaust products of combustion of hydrocarbon fuel to oil-bearing formation. Injection well has heat-carrying pipe located inside casing string. Heat-carrying pipe has, at least, one seal which is operated by supply under pressure of gases or vapor-gas mixture with organization of its gas-air heat insulation. Engine and force pump are communicated with injection well. EFFECT: provided complex utilization of technical serviceability of hydrocarbon fuel for increase of oil recovery from oil- bearing formation. 3 cl, 4 dwg