A method for the production of gel systems, gel system manufactured according to this process, and its use for frac king - and the cleaning purposes

摘要

A method for manufacturing a reversible, not metal linked water-soluble gel system for frac king - and the cleaning purposes, wherein a functionalized guar or a functionalized, soluble guar derivative and an at least a bifunctional linker by means of a diels - wo 87 / 06894 of the - reaction or free radical reaction reversibly cross-linked and the so formed hydrogel for resolution with an antidote under an elevated temperature and pressure is reacted and the viscosity and hydrophilicity of the hydrogel and the residual gel was be reduced by the antidote, wherein for the case of a diels - wo 87 / 06894 of the - reaction, the functionalized guar or functionalized, soluble guar derivative with diene - or dienophile is selected groups and of the at least bifunctional linker with complementary groups – dienophile is selected or – diene groups of which is substituted, and the antidote with a diene, dienophile is selected or diels - wo 87 / 06894 of the - adduct is functionalized and wherein for the case of a free-radical reaction, the functionalized soluble functionalized guar or guar derivative with an olefinic group or a group which contains a stable free radical, is substituted, and the at least bifunctional linker with complementary groups – stable radical or olefinic group – is substituted, and the antidote with an olefin or a stable free radical is functionalized.