Procedure for oilfield pipeline repair

FIELD: oil and gas industry. SUBSTANCE: invention relates to oil industry and may find application in repair of oilfield pipeline. During repair of oilfield pipeline the pipeline is dug out to the length up to 15 m at the beginning, the pipeline is cut and its end is shifted aside in regard to the pipeline axis to the value of up to 0.4 m; an assembly in a form of a screw downhole motor with a chisel at the tubing string is placed into the pipeline; water is pumped through the tubing string with the flow rate of 0.2 - 0.5 m 3 /min under pressure of 3-6 MPa; the pipe is driven with force from 1.5 up to 3 t to salt deposits and these salt deposits are drilled out; as the assembly moves inside the pipeline the running string is extended, the pipeline is drilled at direct sections with deviation from the axis up to 15° per 10 m. EFFECT: method provides destruction of barium sulphate deposits in the oilfield pipeline. 1 tbl