COMPOSITION FOR FORMATION WATERS SHUTOFF IN OIL AND GAS WELLS Russian patent published in 2003 - IPC

FIELD: oil and gas producing industry, particularly, performance of repairs and isolating jobs in oil and gas wells. SUBSTANCE: composition including dispersion medium in the form of aqueous solution of unifloc and gel-forming agent in the form of copper sulfate CuSO₄, includes ethyl-silicate, contains 2-% aqueous solution of unifloc, copper sulfate CuSO₄ in the form of 10-% aqueous solution, and additionally includes ethyl-silicate at the following ratio of components: 2-% aqueous solution of unifloc, 0.50; copper silicate CuSO₄ in the form of 10-% solution of aqueous solution, 0.17; ethyl silicate, 0.33. EFFECT: provided composition ensuring maximum shutoff of water in oil and gas wells. 1 tbl