Primary cementing
AssigneeHalliburton Services
InventorsKirk L. Harris, Edward F. Vinson, Daniel L. Bour, Patrick T. Brunette, Philip C. Freyaldenhoven, Lindsey D. Lee
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Abstract
This invention relates to a method of cementing a cylinder in a bore, such as a casing in a wellbore, which method involves the use of a hydraulic cement consisting of discrete particles having a particle size not greater than about 30 microns. The cement which is utilized in a water slurry, has a low density, good thixotropic properties and, in one embodiment, expansive characteristics.
Claims13
A method for fixing a cylinder in the interior of a wellbore, wherein said cylinder is situated in said interior of said wellbore so as to define a space between the exterior of said cylinder and the wall of said wellbore, said method comprising the steps of:
- introducing into said space a volume of a slurry of Portland cement;
- maintaining said volume of said slurry in said space for a time sufficient to enable said slurry to form a sheath or rigid cement in said space to thereby fix said cylinder in said interior of said wellbore;
- wherein said slurry is comprised of a mixture of water and said Portland cement in the ratio of from about 0.5 to about 5.0 pounds of water per pound of cement, the particle size of said Portland cement is no greater than about 30 microns, and the Blaine Fineness of said Portland cement is no less than about 6000 square centimeters per gram.
Dependencies are inferred from the claim text.