COMPOSITION FOR BLOCKING AND PLUGGING OIL, GAS AND GAS-CONDENSATE WELLS Russian patent published in 2009 - IPC C09K8/42 

FIELD: chemistry.

SUBSTANCE: invention relates to field of oil and gas extraction, in particular to compositions for blocking and plugging oil, gas and gas-condensate wells, and can be used at enterprises of oil and gas producing industry when carrying out general overhaul of wells (GOW). Composition for blocking and plugging oil, gas and gas-condensate wells, containing water and inhibiting salt, contains sodium chloride as inhibiting salt and, additionally, reducer of filtration and thickener - polyanionic cellulose PAC-H and colmatant -chemically activated vulcaniser powder - CAVP, obtained in processing outer tyres by "Ozone knife" technology, with the following ratio of components, wt %: sodium chloride 15.0, polyanionic cellulose PAC-H 3.0, CAVP 2.0, water 80.0.

EFFECT: increasing viscosity, reducing filtration index, ensuring pseudo-plastic properties, which increase blocking properties, simplifying process of blocking and plugging of wells and reducing time for well development and putting them into designed operation mode.

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