FIELD: oil and gas production industry.
SUBSTANCE: invention is related to drilling and servicing of oil and gas wells, i.e. to devices for isolation of well problem and casing leak zones. The method includes milling of casing inner surface, calibration of annular window to the size of metal patch in the repair interval, cutting of annular grooves in top and bottom parts of the window, installation of metal patch with specified specify negative allowance in the repair interval.
EFFECT: provision of reliable sealing, elimination of patch shift risk.
2 dwg
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