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.

A method for producing a thermally insulating mortar includes introducing water, cement and a liquid surfactant containing a foam concentrate that forms a foam in a predetermined mixing ratio into a mixing device provided with a mixing impeller, and rotating the mixing impeller at a very high speed, wherein a homogeneous mixing between the water, the cement and the formed foam occurs.

The present invention is related to water-swellable polymer particles which contain a hydrophilic base polymer (B) and a hydrophobic polymer (P). It is also related to a process for producing the water-swellable polymer particles, an article containing the water-swellable polymer particles and the use of the water-swellable polymer particles.

A downhole tool for controlling the flow of a fluid in a wellbore includes a component that comprises: a cementitious material; an aggregate; and a ductility modifying agent comprising one or more of the following: an ionomer; a functionalized filler; the functionalized filler comprising one or more of the following: functionalized carbon; functionalized clay; functionalized silica; functionalized alumina; functionalized zirconia; functionalized titanium dioxide; functionalized silsesquioxane; functionalized halloysite; or functionalized boron nitride; a metallic fiber; or a polymeric fiber.

A downhole tool for controlling the flow of a fluid in a wellbore includes a component that comprises: a cementitious material; an aggregate; and a ductility modifying agent comprising one or more of the following: an ionomer; a functionalized filler; the functionalized filler comprising one or more of the following: functionalized carbon; functionalized clay; functionalized silica; functionalized alumina; functionalized zirconia; functionalized titanium dioxide; functionalized silsesquioxane; functionalized halloysite; or functionalized boron nitride; a metallic fiber; or a polymeric fiber.

The invention relates to a composition for inorganic binders, comprising at least one ketone-formaldehyde condensation product on the basis of a cyclic ketone and at least one anionic or nonionic surfactant and/or a thickener, and also to building material mixtures which comprise this composition, and to the use of the composition. The compositions improve the applications properties of the binder formulations.

An aqueous, pourable, foamable, pumpable and settable dispersion, its use to produce a porous, mineral lightweight construction material, and a process for producing the dispersion, are described. The dispersion contains cement and/or zinc phosphate cement or a mixture of cement and/or zinc phosphate cement and a Silicate and/or an aluminosilicate with an alkaline or acidic activator for producing a geopolymer and/or a geopolymer, containing a Surfactant, 0.01 to 5 wt %, relative to the dry mass of the dispersion, of modified and/or unmodified natural potato starch, rice starch, corn starch, and wheat starch and of cooked and/or raw, comminuted pieces of grains, potatoes and rice, and water having a hardness of >3.2 mmol/1. Also described herein are the porous, mineral lightweight construction material and its use. The construction material contains, relative to a given lightweight construction material, 50 wt % to 95 wt % of a cement and/or a zinc phosphate cement or a mixture of a Silicate and/or of an aluminosilicate with an alkaline or acidic activator for producing a geopolymer and/or a geopolymer with cement and/or zinc phosphate cement, 0.001 wt % to 3 wt % of a Surfactant, and 0.01 wt % to <10 wt % of potato starch, rice starch, corn starch and/or wheat starch of cooked and/or raw, comminuted pieces of grains, potatoes and rice.

An aqueous, pourable, foamable, pumpable and settable dispersion, its use to produce a porous, mineral lightweight construction material, and a process for producing the dispersion, are described. The dispersion contains cement and/or zinc phosphate cement or a mixture of cement and/or zinc phosphate cement and a Silicate and/or an aluminosilicate with an alkaline or acidic activator for producing a geopolymer and/or a geopolymer, containing a Surfactant, 0.01 to 5 wt %, relative to the dry mass of the dispersion, of modified and/or unmodified natural potato starch, rice starch, corn starch, and wheat starch and of cooked and/or raw, comminuted pieces of grains, potatoes and rice, and water having a hardness of >3.2 mmol/1. Also described herein are the porous, mineral lightweight construction material and its use. The construction material contains, relative to a given lightweight construction material, 50 wt % to 95 wt % of a cement and/or a zinc phosphate cement or a mixture of a Silicate and/or of an aluminosilicate with an alkaline or acidic activator for producing a geopolymer and/or a geopolymer with cement and/or zinc phosphate cement, 0.001 wt % to 3 wt % of a Surfactant, and 0.01 wt % to <10 wt % of potato starch, rice starch, corn starch and/or wheat starch of cooked and/or raw, comminuted pieces of grains, potatoes and rice.

Embodiments herein include a method comprising providing a self-sealing cement slurry comprising an aqueous base fluid, a cementitious material, and a vulcanized oil and water swellable particulate composite, wherein the vulcanized oil and water swellable particulate composite comprises an elastomer, a crosslinked water swellable superabsorbent polymer, and a hydrophobically modified water-soluble polymer; introducing the self-sealing cement slurry into a subterranean formation; and allowing the self-sealing cement slurry to set, wherein the vulcanized oil and water swellable particulate composite is capable of swelling in the presence of a non-aqueous fluid and an aqueous fluid to reduce the permeability of fluid flowpaths in the set self-sealing cement slurry upon loss of structural integrity.

Embodiments herein include a method comprising providing a self-sealing cement slurry comprising an aqueous base fluid, a cementitious material, and a vulcanized oil and water swellable particulate composite, wherein the vulcanized oil and water swellable particulate composite comprises an elastomer, a crosslinked water swellable superabsorbent polymer, and a hydrophobically modified water-soluble polymer; introducing the self-sealing cement slurry into a subterranean formation; and allowing the self-sealing cement slurry to set, wherein the vulcanized oil and water swellable particulate composite is capable of swelling in the presence of a non-aqueous fluid and an aqueous fluid to reduce the permeability of fluid flowpaths in the set self-sealing cement slurry upon loss of structural integrity.