METHOD FOR BLOCKING OF ABSORBING BEDS IN WELL Russian patent published in 2000 - IPC

FIELD: mining industry. SUBSTANCE: this relates to methods of preparing wells to overhaul repair by blocking of absorbing zones in well. According to method, injected into well are buffer, blocking and pressure-forcing liquids. Used in function of blocking liquid are at least two compounds which in process of mixing create viscous structure possessing high adhesive and convertible properties, for example, compound No.1 includes following components, mas.%: copolymer of styrene with maleic anhydride treated by sodium hydroxide, 15-20; water, the balance. Compound No.2 includes following components, mas.%: acetic acid, 4-5; water, the balance. Compounds are made separately and injected into well successively. Application of method ensures higher efficiency of blocking of absorbing well beds due to enhancing structural-mechanical and adhesive properties of blocking compounds. EFFECT: higher efficiency.