FIELD: mining.
SUBSTANCE: invention relates to a method for formation of a blocking plug in a well. Method for formation of a blocking plug in a well includes placing a magnetic device at level of blocking plug, activation of magnetic field of magnetic device to form on walls of tubing string a barrier of magnetic particles. Magnetic device is installed in circumferential direction along outer wall of tubing string and is lowered into well. Method then includes inducing magnetic field and injecting a liquid substance containing F2O4 with particle size of 10–14 nm.
EFFECT: technical result is creation of disconnecting uniform plug directly inside well.
3 cl, 2 dwg
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