According to an embodiment, a method for thermally insulating a portion of a tubular located inside an enclosed conduit comprises the steps of: (A) introducing a grouting composition into an annulus between the tubular and the enclosed conduit, the grouting composition comprising: (i) a water-swellable binding material comprising water-swellable clay; (ii) an aqueous liquid, wherein the aqueous liquid is the continuous phase of the grouting composition; and (iii) an insulating material; and (B) allowing the grouting composition to set after the step of introducing, wherein after setting the grouting composition has a thermal conductivity of less than 0.3 BTU/hr.Math.ft.Math. F. According to another embodiment, a grouting composition for use in insulating a portion of a tubular located inside an enclosed conduit comprises: (A) a water-swellable binding material comprising water-swellable clay; (B) an aqueous liquid, wherein the aqueous liquid is the continuous phase of the grouting composition; and (C) an insulating material, wherein after the grouting composition has set, the grouting composition has a thermal conductivity of less than 0.3 BTU/hr.Math.ft.Math. F.

An extrudable gypsum-based material is formed from a mixture that includes gypsum in the range of about 40 to 90% by dry weight percent, a secondary material in the range of about 0.1 to 50% by dry weight percent, a reinforcement fiber in the range of about 1 to 20% by dry weight percent, a rheology modifying agent in the range of about 0.5 to 10% by dry weight percent, a retarder in the range of about 0.1 to 8% by dry weight percent, a water in the range of 10 to 50% of a total wet material weight.

An extrudable gypsum-based material is formed from a mixture that includes gypsum in the range of about 40 to 90% by dry weight percent, a secondary material in the range of about 0.1 to 50% by dry weight percent, a reinforcement fiber in the range of about 1 to 20% by dry weight percent, a rheology modifying agent in the range of about 0.5 to 10% by dry weight percent, a retarder in the range of about 0.1 to 8% by dry weight percent, a water in the range of 10 to 50% of a total wet material weight.

The present disclosure relates to downhole fluid additives including a clay, a hydroxylated polymer, a cation, and water. The disclosure further relates to downhole fluids, including drilling fluids, spaces, cements, and proppant delivery fluids containing such as downhole fluid additive and methods of using such fluids. The downhole fluid additive may have any of a variety of functions in the downhole fluid and may confer any of a variety of properties upon it, such as salt tolerance or desired viscosities even at high downhole temperatures.

The present disclosure relates to downhole fluid additives including a clay, a hydroxylated polymer, a cation, and water. The disclosure further relates to downhole fluids, including drilling fluids, spaces, cements, and proppant delivery fluids containing such as downhole fluid additive and methods of using such fluids. The downhole fluid additive may have any of a variety of functions in the downhole fluid and may confer any of a variety of properties upon it, such as salt tolerance or desired viscosities even at high downhole temperatures.

Disclosed is a foamed cementitious composition which limits or eliminates aggregate, especially porous lightweight aggregate and uses a lower than usual water to cementitious composition weight ratio. The stable cementitious foam mixtures may be employed to make cement boards and other cement products. The foamed cementitious composition was made with additions of PVOH foaming stabilizer and surfactant foaming agents to make foam water or by entrain air into cementitious slurry mixtures. The cementitious mixtures have a limited amount or preferably no perlite and no lightweight aggregate. The resulting foamed mixture had foam bubbles with size in the range of 50 to 200 m. After setting the foamed cementitious composition the resulting set board has air cells with size in the range of 50 to 200 m.

Disclosed is a foamed cementitious composition which limits or eliminates aggregate, especially porous lightweight aggregate and uses a lower than usual water to cementitious composition weight ratio. The stable cementitious foam mixtures may be employed to make cement boards and other cement products. The foamed cementitious composition was made with additions of PVOH foaming stabilizer and surfactant foaming agents to make foam water or by entrain air into cementitious slurry mixtures. The cementitious mixtures have a limited amount or preferably no perlite and no lightweight aggregate. The resulting foamed mixture had foam bubbles with size in the range of 50 to 200 m. After setting the foamed cementitious composition the resulting set board has air cells with size in the range of 50 to 200 m.

An insulating monolithic refractory material having sufficient curing strength and usable time ensured and exhibiting excellent stability at high temperature. The insulating monolithic refractory material comprises a binder and a refractory raw material; a bulk specific gravity thereof is 0.8 to 1.8 when a kneaded mixture of the insulating monolithic refractory material with water is cured at normal temperature for 24 hours and then dried at 110 C. for 24 hours; the binder comprises a calcium aluminate cement including CaO and Al.sub.2O.sub.3 as chemical components and a strontium aluminate cement including SrO and Al.sub.2O.sub.3 as chemical components; and on the basis of 100% by mass as a total mass of the binder and the refractory raw material, a content of the strontium aluminate cement is 2 to 10% by mass, and a content of CaO derived from the calcium aluminate cement is 1 to 12% by mass.

An insulating monolithic refractory material having sufficient curing strength and usable time ensured and exhibiting excellent stability at high temperature. The insulating monolithic refractory material comprises a binder and a refractory raw material; a bulk specific gravity thereof is 0.8 to 1.8 when a kneaded mixture of the insulating monolithic refractory material with water is cured at normal temperature for 24 hours and then dried at 110 C. for 24 hours; the binder comprises a calcium aluminate cement including CaO and Al.sub.2O.sub.3 as chemical components and a strontium aluminate cement including SrO and Al.sub.2O.sub.3 as chemical components; and on the basis of 100% by mass as a total mass of the binder and the refractory raw material, a content of the strontium aluminate cement is 2 to 10% by mass, and a content of CaO derived from the calcium aluminate cement is 1 to 12% by mass.

A concrete composition and concrete coating material are proposed. The concrete composition may contain bacteria having a carbon dioxide adsorption mechanism in order to improve the durability of concrete structures and adsorb carbon dioxide in the air regardless of light and dark conditions. The concrete composition may contain a cement-based inorganic binder and an aggregate mixture. The cement-based inorganic binder may include at least one of type 1 ordinary Portland cement, blast furnace slag, or fly ash. The aggregate mixture may include a normal aggregate, and a porous material impregnated with alkalophilic bacteria having a carbon dioxide adsorption mechanism and forming a glycocalyx. The concrete coating material may contain the cement-based inorganic binder, the aggregate mixture, and a fiber material. The fiber material may include at least one of polyethylene or nylon.