METHOD clean the inside of the production casing PIPE FROM OIL WELLS hydrate and paraffin deposits and caps

摘要

The method for cleaning inner surface of pipes of operation strings of oil wells with removal of hydrate and paraffin deposits and plugs includes operations of mounting gusher fittings, oil-pipeline, shutoff and discharge mains, with pumping-in water to operation string, with penetration of operation string with heating unit till the process of oil flow production is achieved, with taking the heating unit from the operation string mounted in drive pipe of the oil well with leaving inter-pipe space between those. The inter-pipe space is through slides connected to the oil-pipeline and discharge mains, after the heating unit is taken out to the surface one pumps in to the operation string hot clean oil under pressure not less than the pressure of the oil gusher; at that hot oil is pumped-in to the operation string till at the outlet of the string pure oil flow is achieved, and pure oil and oil polluted with components of the hydrate and the paraffin deposits from inter-pipe space, respectively, is directed to the oil-pipeline and the discharge mains.