Patent ID: 6124246
Filing Date: 2000-09-26
Classification: C09K

Abstract:
An improved pumpable hardenable epoxy resin composition for sealing a subterranean zone penetrated by a well bore at high temperatures comprising:an epoxy resin selected from the group of liquid resins comprised of epichlorohydrin and bisphenol A having a molecular weight in the range of from about 200 to about 1000 and having one gram equivalent of epoxide per about 100 to 200 grams of resin;an aromatic diluent comprised of one or more aromatic compounds, said diluent being present in an amount in the range of from about 25% to about 45% by weight of epoxy resin in said composition;a hardening agent selected from the group of 2-ethyl, 4-methyl imidazole, carboxylic acid anhydrides and mixtures thereof present in an amount in the range of from about 0.2% to about 0.4% by weight of epoxy resin in said composition; anda hardening retarder for delaying the hardening of said epoxy resin composition comprised of a liquid solution containing a halide salt in an amount of at least about 15% by weight of said solution, said solution being soluble in said epoxy resin composition and being present therein in an amount in the range of from about 0.13% to about 3% by weight of epoxy resin in said composition.