The present invention relates to a defoamer emulsion, which comprises at least one alkyl ether sulfate or sulfonate, at least one defoamer and water, wherein the alkyl in the alkyl ether sulfate or sulfonate is C.sub.6-C.sub.22 alkyl and the average droplet diameter of the emulsion is less than 300 nm. The present invention also provides a process for producing it, a polycarboxylate ether formulation comprising the defoamer emulsion and a cement composition comprising the polycarboxylate ether formulation. The defoamer emulsion of the present invention possesses high transmittance and excellent stability. The polycarboxylate ether formulation comprising the defoamer emulsion also shows excellent stability. The cement composition comprises the polycarboxylate ether formulation according to the present invention has a low air content.

The present invention relates to a defoamer emulsion, which comprises at least one alkyl ether sulfate or sulfonate, at least one defoamer and water, wherein the alkyl in the alkyl ether sulfate or sulfonate is C.sub.6-C.sub.22 alkyl and the average droplet diameter of the emulsion is less than 300 nm. The present invention also provides a process for producing it, a polycarboxylate ether formulation comprising the defoamer emulsion and a cement composition comprising the polycarboxylate ether formulation. The defoamer emulsion of the present invention possesses high transmittance and excellent stability. The polycarboxylate ether formulation comprising the defoamer emulsion also shows excellent stability. The cement composition comprises the polycarboxylate ether formulation according to the present invention has a low air content.

Cement slurries, cured cements, and methods of making cured cement and methods of using cement slurries are provided. The cement slurries have, among other attributes, an extended thickening time, leading to improved retardation, flowability, and pumpability and may be used, for instance, in the oil and gas drilling industry. The cement slurry comprises water, a cement precursor material, acrylic acid copolymer, zinc oxide, and a phosphonic acid-based thickener.

Cement slurries, cured cements, and methods of making cured cement and methods of using cement slurries are provided. The cement slurries have, among other attributes, an extended thickening time, leading to improved retardation, flowability, and pumpability and may be used, for instance, in the oil and gas drilling industry. The cement slurry comprises water, a cement precursor material, acrylic acid copolymer, zinc oxide, and a phosphonic acid-based thickener.

Multifunctional composite building materials, which are obtained by mixing nano silicon dioxide, nano titanium dioxide, nano aluminum oxide and nano zinc oxide with nano nickel-cobalt ferrite or nano nickel-zinc ferrite; surface active agent; air entrained agent such as diethanolamine lauryl sulphonate, protein extracts, pulp waste liquid, diatomite; kumgang medical stone; viscosifier such as hydroxyl ethyl cellulose and foam elimination agent such as tributylphosphoric acid ester or butanol in a certain ratio.

Multifunctional composite building materials, which are obtained by mixing nano silicon dioxide, nano titanium dioxide, nano aluminum oxide and nano zinc oxide with nano nickel-cobalt ferrite or nano nickel-zinc ferrite; surface active agent; air entrained agent such as diethanolamine lauryl sulphonate, protein extracts, pulp waste liquid, diatomite; kumgang medical stone; viscosifier such as hydroxyl ethyl cellulose and foam elimination agent such as tributylphosphoric acid ester or butanol in a certain ratio.

A method for using an extended-life settable composition is disclosed. The method includes providing an extended-life settable composition comprising red mud, calcium hydroxide, water, and a cement set retarder. The method further includes activating the extended-life settable composition. The method additionally includes introducing the extended-life settable composition into a subterranean formation and allowing the extended-life settable composition to set in the subterranean formation.

A method for using an extended-life settable composition is disclosed. The method includes providing an extended-life settable composition comprising red mud, calcium hydroxide, water, and a cement set retarder. The method further includes activating the extended-life settable composition. The method additionally includes introducing the extended-life settable composition into a subterranean formation and allowing the extended-life settable composition to set in the subterranean formation.

Disclosed is a method of spraying a surface with a set-delayed cement. The method comprises providing a set-delayed cement composition comprising water, pumice, hydrated lime, and a set retarder; spraying a surface with the set-delayed cement composition; and allowing the set-delayed cement composition to set on the surface.

Disclosed is a method of spraying a surface with a set-delayed cement. The method comprises providing a set-delayed cement composition comprising water, pumice, hydrated lime, and a set retarder; spraying a surface with the set-delayed cement composition; and allowing the set-delayed cement composition to set on the surface.