Foamed Cement Compositions and Associated Methods of Use
OwnerSamuel J. Lewis, Michael J. Szymanski +1inventors
InventorsSamuel J. Lewis, Michael J. Szymanski, Kristi D. Thacker
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Abstract
A method is provided for reducing the density of a well cement composition for cementing in a subterranean formation. The method comprises providing a cement composition that comprises water and a cement, and then adding an additive comprising an anionic foam stabilizer and an anionic foaming agent or a Zwitterionic foam booster. A gas is added to this mixture to reduce the density. Further, foamed cement compositions and additives for foaming and stabilizing a well cement composition are provided.
Claims20
An additive for foaming and stabilizing a well cement composition, comprising:
- an anionic foaming agent that is not amphoteric;
- and
- an anionic foam stabilizer.
An additive for foaming and stabilizing a cement composition, comprising:
- a Zwitterionic foam booster;
- and
- an anionic foam stabilizer comprising at least one surfactant selected from the group consisting of a fatty methyl ester sulfonate surfactant, an aliphatic alkyl sulfonate surfactant having an alkyl chain length of from about 16 to about 22 carbons, an aliphatic alkyl sulfate surfactant having an alkyl chain length of from about 16 to about 22 carbons, and any combination thereof.
An additive for foaming and stabilizing a cement composition, comprising:
- an anionic fatty methyl ester sulfonate surfactant;
- an alkyl ether sulfate surfactant;
- and
- a betaine surfactant.
Dependencies are inferred from the claim text.