Abstract: Modification of the rheology of a liquid medium, aqueous or nonaqueous, with polymers in the form of specific particles obtained by grinding (micronizing) a porous macrogel, itself prepared by a process comprising a radical polymerization step which comprises reacting in the presence of pore formers monomers containing monomers bearing at least two ethylenic unsaturations, typically in combination with monomers bearing a single ethylenic unsaturation; a polymerization initiator; and optionally a polymerization control agent. These polymer particles keep other particles in suspension within the liquid medium, and also the stabilized suspensions are obtained.

Abstract: A method includes providing a movable module to a worksite, the movable module including a pump, a variable frequency drive coupled to the pump, a programmable logic controller operatively coupled to the variable frequency drive, and a first flow meter coupled to an outlet of the pump. The method also includes coupling a tank to a suction end of the pump, the tank having a concentrated chemical disposed therein, and coupling an outlet of the pump to a blender fluid flowline. The method also includes providing a low dosage of the concentrated chemical of between 0.01 and 0.15 gallons per thousand gallons to a clean fluid in the blender fluid flowline by pumping the concentrated chemical with the pump from the tank to the blender fluid flowline and adjusting an amount of the concentrated chemical pumped in response to data input into the programmable logic controller.

Abstract: A viscoelastic surfactant formulation may include a zwitterionic surfactant with a general formula (I): where A is a C or SO, E1 is a linear or branched, saturated or unsaturated hydrocarbon chain having 1 to 4 carbon atoms, R1 and R2 are selected from alkyl groups of from 1 to about 4 carbon atoms, and R3 is a linear or branched, saturated or unsaturated alkyl chain having less than 22 carbon atoms or is —(CH2). NHC(O)—R4, where R4 is a linear or branched, saturated or unsaturated alkyl chain having less than 22 carbon atoms and n ranges from 1 to 6; a synergistic co-surfactant containing an alkoxylate co-surfactant; and at least one miscible solvent.

Abstract: A viscoelastic surfactant formulation may include a zwitterionic surfactant with a general formula (I): where A is a C or SO, E1 is a linear or branched, saturated or unsaturated hydrocarbon chain having 1 to 4 carbon atoms, R1 and R2 are selected from alkyl groups of from 1 to about 4 carbon atoms, and R3 is a linear or branched, saturated or unsaturated alkyl chain having less than 22 carbon atoms or is —(CH2)n NHC(O)—R4, where R4 is a linear or branched, saturated or unsaturated alkyl chain having less than 22 carbon atoms and n ranges from 1 to 6; a synergistic co-surfactant containing a primary, secondary, or tertiary amine; amido group; amine oxide; or combinations thereof; and at least one miscible solvent.

Abstract: The invention relates to a composition which comprises within an aqueous medium: —at least one ethoxylated alkylamine; and—at least one amphoteric or zwitterionic surfactant. The invention further relates to the use of said compositions as foaming compositions, in particular for EOR (enhanced oil recovery).

Abstract: A surfactant package may include an alpha olefin sulfonate primary surfactant; a betaine or sultaine co-surfactant; water; and optionally one or more solvents and/or co-solvents. A well treatment fluid may include an aqueous fluid, the surfactant package, and a friction reducer. A method of treating a portion of a subterranean formation may include introducing the well treatment fluid into a portion of the subterranean formation.

Abstract: A water-in-oil emulsion that includes an oil phase (O) and an aqueous phase (A) at an O/A ratio of from about 1:8 to about 10:1; wherein the water-in-oil emulsion includes the oil phase as a continuous phase that includes an inert hydrophobic liquid, at least one water-insoluble hydrophobic monomer, and at least one surfactant, and the aqueous phase as a dispersed phase of distinct particles in the oil phase that includes water and a water soluble polymer that includes: (i) at least one acrylamide monomer and (ii) at least one acrylic acid monomer; wherein the water soluble polymer is present in an amount from about 10 to about 35 weight percent of the water-in-oil emulsion.

Abstract: A polymer dispersion includes a water-soluble copolymer prepared by controlled radical polymerization; a water soluble salt; a polyol; a salt selected from the group consisting of sodium citrate, sodium phosphate, sodium nitrate, and combinations thereof; and water. Methods for using the polymer dispersion for oilfield friction reduction occur under a variety of adverse conditions including low temperatures, salt, scale, and iron.

Abstract: The invention relates to a composition C which comprises, in an aqueous medium M: surfactants suitable for creating a foam in the presence of a gas; and polymers P based on acrylamide or acrylamido units, having a molecular mass of 1,000,000 to 20,000,000 g/mol; or: composition C has a viscosity of less than 6 mPa·s; and the content of polymer P is greater than the concentration limit beyond which the apparent viscosity of a foam obtained from composition C is greater by at least 10% than the apparent viscosity of a foam obtained from the same composition but deprived of polymers. The invention further relates to the use of these compositions as foaming compositions for EOR.

Abstract: A water-in-oil emulsion that includes an oil phase (O) and an aqueous phase (A) at an O/A ratio of from about 1:8 to about 10:1; wherein the water-in-oil emulsion includes the oil phase as a continuous phase that includes an inert hydrophobic liquid, at least one water-insoluble hydrophobic monomer, and at least one surfactant, and the aqueous phase as a dispersed phase of distinct particles in the oil phase that includes water and a water soluble polymer that includes: (i) at least one acrylamide monomer and (ii) at least one acrylic acid monomer; wherein the water soluble polymer is present in an amount from about 10 to about 35 weight percent of the water-in-oil emulsion.

Abstract: A water-in-oil emulsion, having an oil phase (0) and an aqueous phase (A) at an O/A ratio of from about 1:8 to about 10:1, may include the oil phase as a continuous phase that includes an inert hydrophobic liquid, and the aqueous phase as a dispersed phase of distinct particles in the oil phase that includes water, a water soluble polymer, and at least one surfactant: wherein the water soluble polymer includes from about 1 to about 60 weight percent of one or more cationic monomers, wherein the amount is by total weight of the water soluble polymer; wherein the water soluble polymer is present in an amount from about 5 to about 40 weight percent of the water-in-oil emulsion; and wherein an aqueous solution prepared by inverting the water- in-oil emulsion by adding it to water has at least comparable viscosity build to an aqueous solution made from a water-in-oil emulsion of the same composition containing 15 weight percent more water soluble polymer.

Abstract: This invention relates to the field of techniques for treating subterranean formations with gels during an oil or gas exploration or production operation, i.e., during drilling, completion, or hydraulic fracking processes. The invention relates in particular to a system making it possible to limit or even inhibit the phenomena known as loss of fluids (wager and/or gas) in an underground formation, particularly in a zone where the temperature is high. More particularly, the invention relates to a suspension (S) comprising: an aqueous phase containing salts; and within said aqueous phase, particles (p) based on associative polymers (P).

Abstract: The present invention relates to the preparation of polymers that are of use in particular as a rheology agent, and are suitable for use in very concentrated saline media, which comprises a step of micellar radical polymerization in which are brought into contact, in an aqueous medium: —hydrophilic monomers; —hydrophobic monomers in the form of a micellar solution, containing micelles comprising these hydrophobic monomers; —a radical polymerization initiator; and —preferably an agent for controlling radical polymerization, wherein said micelles comprise at least one surfactant of amphoteric nature. The polymers obtained according to the invention are in particular of use for enhanced oil recovery.

Abstract: A water-in-oil emulsion having an oil phase (O) and an aqueous phase (A) at an O/A ratio of from about 1:8 to about 10:1; wherein the water-in-oil emulsion includes the oil phase as a continuous phase that includes an inert hydrophobic liquid, and the aqueous phase as a dispersed phase of distinct particles in the oil phase that includes water, a water soluble polymer, and at least one surfactant; wherein the water soluble polymer includes from about 1 to about 60 weight percent of one or more cationic monomers, wherein the amount is by total weight of the water soluble polymer; wherein the water soluble polymer is present in an amount from about 5 to about 40 weight percent of the water-in-oil emulsion; and wherein an aqueous solution prepared by inverting the water-in-oil emulsion by adding it to water has at least comparable viscosity build to an aqueous solution made from a water-in-oil emulsion of the same composition containing 15 weight percent more water soluble polymer.

Abstract: Compositions and methods for fracturing a subterranean formation are presented. Also provided are compositions and methods for reducing friction-related losses in a well treatment fluid. In general, the compositions include a copolymer that includes one or more vinylphosphonic acid (“VPA”) monomers.

Abstract: A polymer dispersion may include a water soluble copolymer, a water soluble salt, a polyol, and water. A method of preparing a polymer dispersion may include controlled radical polymerization. A method of using the polymer dispersion as a friction reducer in oil field processes.

Abstract: The present invention relates to the use of sequential copolymers (P), comprising at least one chain (C) capable of being obtained by micellar polymerization, for keeping solid particles (p) in suspension in a fluid (F) where said chain (C) is soluble.