Patent ID: 6626243
Filing Date: 2003-09-30
Classification: C04B,C09K

Abstract:
A method of cementing within a wellbore, comprising:introducing a cement slurry comprising effective amounts of Portland cement, aluminum silicate and metal sulfate into a wellbore; and allowing said cement slurry to cure within said wellbore; wherein said metal sulfate comprises aluminum sulfate; and wherein said cement slurry is formulated from a cement composition comprising greater than or equal to about 50% Portland cement by weight of total dry blend prior to addition of water; and wherein said cement slurry contains effective amounts of aluminum silicate and aluminum sulfate such that said cement slurry exhibits a compressive strength of greater than about 90 psi as measured at 50Â° F. at 24 hours, in combination with a heat of hydration of equal to or less than about 6 Cal./Sec-kg (by weight of slurry) as measured at 45Â° F. immediately after mixing.