Patent ID: 7438755
Filing Date: 2008-10-21
Classification: C04B,C09K,Y02W

Abstract:
1. A sealant for an oil or geothermal well capable of setting within about 3 to about 6 hours at temperatures less than about 250° F. for shallow wells less than about 10,000 feet and deep wells greater than about 10,000 feet, said sealant being comprised of: a) MgO present in the range of from about 9.9 to about 14.5% by weight of said sealant, b) KH c) class C fly ash present in the range of from about 19.8 to about 36.3% by weight of said sealant, d) class F fly ash present in the range of from about 19.8 to about 0% by weight of said sealant, e) boric acid or borax present in the range of from about 0.39 to about 1.45% by weight of said sealant, and f) water present in the range of from about 20.3 to about 21.86% by weight of said sealant.