A treatment fluid for treating a portion of a water-sensitive subterranean formation comprising: a base fluid; and a stabilizing compound, wherein the stabilizing compound reduces or eliminates swelling of a water-swellable mineral of the portion of the water-sensitive subterranean formation, and wherein the stabilizing compound comprises: (A) a cationic functional group; and (B) a hydrophobic portion. A method of treating a portion of a water-sensitive subterranean formation comprising: introducing a treatment fluid into a wellbore, wherein the wellbore penetrates the subterranean formation, wherein the portion of the subterranean formation comprises a water-swellable mineral.

A treatment fluid for treating a portion of a water-sensitive subterranean formation comprising: a base fluid; and a stabilizing compound, wherein the stabilizing compound reduces or eliminates swelling of a water-swellable mineral of the portion of the water-sensitive subterranean formation, and wherein the stabilizing compound comprises: (A) a cationic functional group; and (B) a hydrophobic portion. A method of treating a portion of a water-sensitive subterranean formation comprising: introducing a treatment fluid into a wellbore, wherein the wellbore penetrates the subterranean formation, wherein the portion of the subterranean formation comprises a water-swellable mineral.

A cement dispersant comprises component i) and at least one of components ii) and iii). Component i) is a naphthalenesulfonic acid polycondensate being obtainable by a condensation reaction of i-1) a naphthalenesulfonic acid, i-2) an alkoxylated hydroxyaryl compound having a polyoxyalkylene chain with 3 to 130 oxyalkylene units, and i-3) formaldehyde, in a weight ratio of i-1):i-2) of 95:5 to 60:40. Component ii) is a phosphorylated polycondensate being obtainable by a condensation reaction of ii-1) an aromatic compound having a phosphate moiety, ii-2) an alkoxylated hydroxyaryl compound having a polyoxyalkylene chain with 3 to 130 oxyalkylene units, and ii-3) formaldehyde, in a weight ratio of ii-1):ii-2) of 2:98 to 40:60. Component iii) is a polycarboxylate ether having a carbon-chain backbone with anionic and/or anionogenic groups and polyoxyalkylene side chains having an average of 3 to 130 oxyalkylene units. The cement dispersant has a good dosage efficiency and a good balance between effectiveness and cost without compromising compressive strength, while avoiding compatibility issues and viscosity increase of the dispersant.

A copolymer includes a main hydrocarbon chain and side groups including carboxylic groups and polyoxyalkylate groups. The copolymer further includes gem-bisphosphonate groups. The copolymer can be included in an admixture for suspensions of mineral particles and in a composition of mineral particles. The copolymer can also be used for fluidifying and maintaining fluid, suspensions of mineral particles and for reducing the sensitivity of hydraulic compositions to clays and alkaline sulfates.

A copolymer includes a main hydrocarbon chain and side groups including carboxylic groups and polyoxyalkylate groups. The copolymer further includes gem-bisphosphonate groups. The copolymer can be included in an admixture for suspensions of mineral particles and in a composition of mineral particles. The copolymer can also be used for fluidifying and maintaining fluid, suspensions of mineral particles and for reducing the sensitivity of hydraulic compositions to clays and alkaline sulfates.

Cement compositions containing a cement component and an oil-immiscible solvent and methods for using same are provided. In another aspect, methods for sealing subterranean zones are provided that include emplacing a cement composition into a wellbore containing a cement component and an oil-immiscible solvent, contacting the cement composition with a water source, and reacting the cement composition with the water source to form a hardened cement.

Cement compositions containing a cement component and an oil-immiscible solvent and methods for using same are provided. In another aspect, methods for sealing subterranean zones are provided that include emplacing a cement composition into a wellbore containing a cement component and an oil-immiscible solvent, contacting the cement composition with a water source, and reacting the cement composition with the water source to form a hardened cement.

The present invention relates to a method for producing amphiphilic functionalized highly branched melamine-polyamine polymers by condensing melamine and optionally a melamine derivate having at least one different amine having at least two primary amino groups and optionally also with urea and/or at least one urea derivative and/or with at least one at least difunctional diisocyanate or polyisocyanate and/or at least one carbolic acid having at least two carboxyl groups or at least one derivative thereof, optionally quaternizing a portion of the amino groups of the polymer thereby obtained, reacting the polymer thus obtained with at least one compound capable of undergoing a condensation or addition reaction with amino groups, and optionally quaternizing at least part of the amino groups of the polymer obtained in the first step. The invention further relates to the amphiphilic functionalized highly branched melamine-polyamine polymers that can be obtained by the method according to the invention, and to the use thereof as surface active agents.

The present invention relates to the technical field of hydraulic compositions, for example concrete and mortar compositions. More specifically, the present patent application relates to additives used in hydraulic compositions, to the compositions containing same, and also to the method for preparing these additives and to the various uses thereof.

The present invention relates to the technical field of hydraulic compositions, for example concrete and mortar compositions. More specifically, the present patent application relates to additives used in hydraulic compositions, to the compositions containing same, and also to the method for preparing these additives and to the various uses thereof.