| 摘要 |
PCT No. PCT/NO96/00255 Sec. 371 Date Apr. 23, 1998 Sec. 102(e) Date Apr. 23, 1998 PCT Filed Oct. 25, 1996 PCT Pub. No. WO97/15746 PCT Pub. Date May 1, 1997Agent and method for establishing different types of zone sealings particularly in oil wells and gas wells, wherein the zone to be sealed is supplied with a composition comprising: monomers, an initiator for heat-induced production of free radicals, a pot life extending inhibitor for stabilization of free radicals, and optionally other additives. The composition is subjected to radical polymerization induced by heat in the well zone and at a temperature of 5-120 DEG C., and establishes a cured mass, particularly at temperatures in the range of 65-100 DEG C. The composition is supplied with an at least partly unsaturated prepolymer selected from the group consisting of polyester and epoxy vinylester, including one or more vinyl-containing co-monomers selected from the group consisting of styrene, vinyltoluene, 2-hydroxyethyl-methacrylate and 2-hydroxypropyl-methacrylate. The prepolymer is present in a quantity of 15-75 weight parts and the vinyl-containing co-monomers are added in a quantity of 75-15 weight parts. The composition is particularly suited for low temperature applications.
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