Patent ID: 6729405
Filing Date: 2004-05-04
Classification: C04B,C09K

Abstract:
A method of cementing within a wellbore, comprising:introducing a cement slurry comprising a hydraulic cement base and a natural mineral fiber into said wellbore; and allowing said cement slurry to cure within said wellbore to form a hardened cement composition within said wellbore; wherein a temperature of at least a first portion of said well bore is greater than about 180Â° F.; wherein said natural mineral fiber is present in said cement slurry in an amount greater than about 10% by weight of cement, and is also present in said cement slurry in an amount selected to be effective to result in at least a portion of said cured cement composition having a ratio of flexural strength to compressive strength that is greater than or equal to about 0.35 at said temperature of said at least a first portion of said well bore that is greater than about 180Â° F.; and wherein said natural mineral fiber comprises at least one calcium silicate natural mineral fiber.