PRESERVATION FLUID Russian patent published in 2000 - IPC

FIELD: oil-producing industry, particularly, conservation of oil producing and injection wells. SUBSTANCE: preservation fluid KZh-1 is prepared with use of glycerin production waste in the form of polyglycerols and product of reaction of polyethylene-polyamine with fat acids of light tall oil in the form of NEFTEKhIM corrosion inhibitor with following ratio of components, wt. %: polyglycerols, 99.999-99.992; NEFTEKhIM corrosion inhibitor, 0.008-0.010. EFFECT: higher efficiency of protection from corrosion in oil producing and injection wells with preservation of reservoir rocks of bottom-hole formation zone, provision of ecological safety. 1 tbl, 3 ex