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US 6,367,550 B1Granted
Foamed well cement slurries, additives and methods
AssigneeHalliburton Energy Service, Inc.
InventorsJiten Chatterji, Roger S. Cromwell, Chad R. Brenneis, Bobby J. King, Dennis W. Gray, Frank Zamora
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Abstract
The present invention provides improved foamed well cement slurries, additives and methods. The foamed well cement slurries are basically comprised of a hydraulic cement, sufficient water to form a pumpable slurry, sufficient gas to form a foam and an effective amount of an additive for foaming the slurry comprised of hydrolyzed keratin.
Claims11
A method of cementing a subterranean zone penetrated by a well bore comprising the steps of:
- (a) forming a foamed cement slurry comprised of hydraulic cement, sufficient water to form a pumpable slurry, sufficient gas to form a foam and an effective amount of an additive for foaming and stabilizing said slurry comprised of hydrolyzed keratin;
- (b) placing said foamed cement slurry into said subterranean zone by way of said well bore;
- and
- (c) allowing said foamed cement slurry to set into a hard impermeable mass.
1 more element
A method of cementing a subterranean zone penetrated by a well bore comprising the steps of:
- (a) forming a foamed cement slurry comprised of Portland cement, sufficient water to form a pumpable cement slurry, a gas selected from the group consisting of air and nitrogen present in an amount in the range of from about 10% to about 40% by volume of said cement slurry and an additive for foaming said cement slurry comprised of hydrolyzed keratin present in an amount in the range of from about 1% to about 5% by volume of water in said cement slurry;
- (b) placing said foamed cement slurry into said subterranean formation zone by way of said well bore;
- and
- (c) allowing said foamed cement slurry to set into a hard impermeable mass.
1 more element
Dependencies are inferred from the claim text.