METHOD OF EXPRESS-REPAIR FOR RESTORATION OF TIGHTNESS OF GAS-WATER-OIL SHOWINGS OF WELLS Russian patent published in 2009 - IPC E21B33/13 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to mining and can be used while implementation of repair-insulating works in wells, particularly for restoration of tightness of casing and string-casing spaces. Method includes excessive pressure release from string-casing spaces up to atmospheric, casing and string-casing spaces up to top area of mouth by sealant on the basis of water solution of saponated tall pitch with concentration from 5 up to 17%, mixed with liquid glass from 10 up to 30% concentration. At values of string-casing pressures less than 10 atm, which are created by sources of fluid appearance, close to Earth surface, it is created composite pillar from two sequentially pumped into portions: quasiviscous portion of liquid glass 35% concentration and portion of water solution of saponated tall pitch 5-17% concentration.

EFFECT: provides acceleration of migration by permeable channels of sealant, and also provides more continuous keeping of sealant in top intervals of migration channels.

2 cl_, 2 ex