FIELD: oil and gas production.
SUBSTANCE: invention relates to oil industry and may find application in well repair. Pipe string is lowered into well, volume of isolating substance is pumped by circulation into interval of production string integrity damage, isolating substance is pushed into breaches, and then remains of isolating substances and pipe string are removed from well. Previously pipe string is equipped with anti-adhesion coating, in pipe string pipes are selected from existing range to locate in breach interval with external diametre that is most close to inner diametre of well production string, isolating substance is represented by low-viscosity solution, operations of pumping, driving and removal of isolating substance are repeated until production string integrity breaches are eliminated.
EFFECT: method makes it possible to repair well production string with integrity breaches by holes of small diametre and injectability of isolating compositions in breaches interval.
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