FIELD: oil-and-gas industry.
SUBSTANCE: proposed method comprises detection of high corroded sections and filling the well with two-component mortar. The latter consists of iron chloride and sodium chloride. Assembly composed by iron pig with centraliser anode and heater is run on cable. Heater is located above anode while mortar is heated to 95-100°C. Voltage is fed in between operation string and node at current density of 10-20 A/dm2 Said assembly is smoothly lifted along operation string with stops at high chemical wear sections for their galvanic ironing.
EFFECT: higher efficiency of recovery.
7 cl
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