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US 5,588,489 AGranted
Lightweight well cement compositions and methods
AssigneeHalliburton Company
InventorsJiten Chatterji, James E. Griffith, Patty L. Totten, Bobby J. King
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Abstract
The present invention provides lightweight, fast setting cement compositions and methods which can be utilized in performing a variety of well cementing operations. The cement compositions are basically comprised of slag cement, water sufficient to form a pumpable slurry, a gas sufficient to foam the slurry and a foaming agent.
Claims36
A method of cementing a zone in a well comprising the steps of:
- providing a cement composition consisting essentially of slag cement, water present in an amount sufficient to form a pumpable slurry, a gas present in an amount sufficient to foam said slurry and a foaming agent;
- and
- placing said cement composition in the zone.
A method of cementing a zone in a well comprising the steps of:
- providing a cement composition comprising slag cement, water present in an amount sufficient to form a pumpable slurry, a gas present in an amount sufficient to foam said slurry and a foaming agent which comprises the sodium salt of alpha-olefinic sulfonic acid and is present in said composition in an amount in the range of from about 0.5% to about 10% by weight of water in said composition;
- and
- placing the well cement composition in said zone.
A method of cementing a zone in a well comprising the steps of:
- providing a cement composition consisting essentially of:
- slag cement comprised of particulate slag and an activator combined with the particulate slag in an amount in the range of from about 0.5% to about 10% by weight of the slag,
- water present in an amount sufficient to form a pumpable slurry,
- a gas present in an amount sufficient to foam said slurry and produce a slurry density in the range of from about 6 to about 16 pounds per gallon, and
- a foaming agent;
- and
- placing said cement composition in the zone.
4 more elements
Dependencies are inferred from the claim text.