Set retarded cementing compositions and methods
AssigneeHalliburton Company
InventorsJiten Chatterji, Rickey L. Morgan, Garland W. Davis
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Abstract
The present invention provides set retarding additives, set retarded hydraulic cement compositions and methods of using the set retarded cement compositions for cementing subterranean zones in wells. A preferred set retarding additive comprises an alkanolamine salt produced by the reaction of a hydroxy carboxy acid, such as tartaric acid, gluconic acid or glucoheptonic acid, with an alkanolamine, such as monoethanolamine, diethanolamine or triethanolamine.
Claims22
A set retarded cement composition comprising:
- a hydraulic cement;
- sufficient water to form a pumpable slurry;
- and
- an alkanolamine salt present in the cement composition in an amount in the range of from in excess of 1.1% to about 10% by weight of dry cement therein.
A method of cementing a subterranean zone comprising the steps of:
- forming a set retarded cement composition comprising:
- a hydraulic cement,
- sufficient water to form a pulpable slurry, and
- an alkanolamine salt present in the cement composition in an amount in the range of from in excess of 1.1% to about 10% by weight of dry cement therein;
- pumping the cement composition into the subterranean zone to be cemented;
- and
- allowing the cement composition to set therein.
A set retarded cement composition comprising:
- a hydraulic cement;
- sufficient water to form a pumpable slurry;
- and
- triethanolamine gluconate present in the cement composition in an amount in the range of from about 0.1% to about 10% by weight of dry cement therein.
A method of cementing a subterranean zone comprising the steps of:
- forming a set retarded cement composition comprising:
- a hydraulic cement,
- sufficient water to form a pumpable slurry, and
- triethanolamine gluconate present in the cement composition in an amount in the range of from about 0.1% to about 10% by weight of dry cement therein;
- pumping the cement composition into the subterranean zone to be cemented;
- and
- allowing the cement composition to set therein.
Dependencies are inferred from the claim text.