Patent ID: 6332921
Filing Date: 2001-12-25
Classification: C04B,C09K,Y02W,Y10S

Abstract:
An improved cement composition useful for cementing high temperature wells containing carbon dioxide comprising:calcium aluminate present in an amount of about 15% to about 45% by weight of said composition;fly ash present in an amount of about 25% to about 45% by weight of said composition;sodium polyphosphate present in an amount in the range of from about 5% to about 13% by weight of the composition;a set retarder for lengthening the time in which said composition starts to thicken and set whereby said composition is capable of being pumped into wells having bottom hole temperatures above about 125.degree. F., said set retarder being present in an amount in the range of from about 0.5% to about 2% by weight of said composition; andsufficient water to form a pumpable slurry.