METHOD FOR CLEANING PIPES WITH STEAM-GAS MIXTURE Russian patent published in 1999 - IPC

FIELD: oil production industry. SUBSTANCE: method is used for cleaning oil piping from salt-paraffin depositions. According to method, delivered to end surface of pipe units is stream of steam-gas mixture which is generated by gas-turbine power plant. Used in function of this power plant is aircraft engine with afterburner and adjustable nozzle. Water is injected into afterburner of engine at angle of 0-90 deg relative to axis of nozzle. Cleaning procedure is performed at diameter of steam-gas mixture flow equal to 105-110% of pipe unit diameter and at water flow rate equal to 0.1-60% of gas flow volume. EFFECT: high quality of pipe cleaning, stable operation of cleaning unit, reduced demand of fuel for generation of steam-gas mixture and also reduced toxicity of exhaust gases.