FIELD: oil and gas industry.
SUBSTANCE: according to the method the sealing device lowering down is carried out into the casing string channel at the threshold distance from the perforation. The sealing device includes the sealing material charge, which have the auxiliary plugging material. At least the part of the sealing device is made from the brittle material, able to break into parts under the breaking stress. The part of the sealing material charge is formed by the brittle material. Perform the sealing material charge release from the sealing device for supplying the auxiliary sealing material to the perforations to add the main plugging material and reduce the fluid medium flow rate, extending from the casing string channel through the perforations.
EFFECT: improving the efficiency and reliability of the perforations sealing in the borehole casing string.
37 cl, 13 dwg
