METHOD FOR REMOVING ASPHALT-RESIN AND PARAFFIN DEPOSITIONS Russian patent published in 1999 - IPC

FIELD: oil and gas production industry. SUBSTANCE: according to method, removed asphalt-resin and paraffin depositions are dispersed in oil field equipment. Method implies delivery of inhibitor into annular space in amount of 0.5-20 mas.% of volume of oil contained in product being pumped out and located in internal space of pump-compressor pipes and in annular space within limits from dynamic level to pump inlet. Operation of immersed pump is performed in closed circuit system consisting of pumping pipes and discharge line. Pumped-out product together with reagent circulates through closed circuit system. Application of aforesaid method improves efficiency of inhibiting asphalt-resin and paraffin depositions together with increasing amount of product recovered. EFFECT: higher efficiency. 1 tbl