11results about How to "Low initial viscosity" patented technology

The invention provides an emulsion slow crosslinking type plugging control gel, which is in an oil-in-water type, and is prepared from the following raw materials in percentage by weight: 25 to 40 weight percent of nonionic monomer, 0.5 to 2 weight percent of dihydroxy anthraquinone, 5 to 16 weight percent of anionic monomer, 0.002 to 0.2 weight percent of initiator and the balance of water. The emulsion comprises the following components in percentage by weight: 10 to 35 percent of deionized water, 15 to 30 percent of non-polar solvent, 2 to 8 percent of emulsifier, 1 to 4 percent of emulsifying aid and 0.5 to 1.5 percent of phase inversion agent. According to the plugging adjusting gel, the modified functional monomer dihydroxy anthraquinone is added, and the dihydroxy anthraquinone and monomers such as acrylamide are copolymerized to form oil-in-water type polymer gel, so that the initial viscosity is low, the strength and the plugging rate are high, and the gelling time is controllable.

The invention belongs to the technical field of oilfield exploitation, and relates to an emulsion polymer, an emulsion gelling system and a preparation method and application thereof, in particular to a novel high-temperature-resistant and high-salt-resistant emulsion polymer, an emulsion gelling system and a preparation method and application thereof. The preparation method of the emulsion polymer comprises the following steps: (1) dissolving an emulsifier in solvent oil, and uniformly stirring to obtain an oil phase; (2) completely dissolving a monomer in water to obtain a water phase, and then adjusting the pH value of the water phase with alkali; (3) dropwise adding the oil phase into the water phase to form an oil-in-water emulsion, and stirring after emulsification is finished; and (4) introducing nitrogen to remove oxygen, adding an initiator to initiate a polymerization reaction, then preserving heat, and obtaining an emulsion polymer after the reaction is finished. The emulsion polymer disclosed by the invention is low in initial viscosity and high in temperature resistance and salt resistance, and has the capability of realizing reservoir plugging and profile adjustment in high-temperature and high-salt oil reservoir profile control measures.

This invention relates to the field of water treatment chemicals, and discloses a hydroxyl-based coagulant aid, its preparation method, and its application. The coagulant aid is composed of solid polyaluminum chloride, polyvinyl alcohol, urea, an aqueous solution of alkyl glycosides, sodium gluconate, sodium tetraborate decahydrate, triethanolamine, deionized water, and glacial acetic acid for pH adjustment. This invention reduces the system viscosity through urea, and, combined with the spatial isolation of alkyl glycosides and the coordination chelation of sodium gluconate, inhibits the salting-out and phase separation of polyvinyl alcohol induced by high concentrations of polyaluminum chloride. The system utilizes sodium tetraborate decahydrate to construct a pH-regulated delayed cross-linking mechanism, maintaining liquid-phase homogeneity under slightly acidic conditions. When introduced into neutral or weakly alkaline water, the agent can undergo in-situ cross-linking with the water to form a network structure, which, in conjunction with inorganic aluminum salts, achieves the netting and sedimentation of suspended particles. This invention balances long-term storage stability in high-salt systems with highly efficient turbidity removal performance.

The invention discloses an in-depth profile control system. The in-depth profile control system is characterized by being prepared from the following raw materials: polyacrylamide with the concentration ratio of 0.3 to 0.5 percent, a phenolic aldehyde cross-linking agent with the concentration ratio of 0.3 to 0.5 percent and a cross-linking enhancer with the concentration ratio of 0.3 to 0.5 percent. Through complexation, hydrolysis and hydroxyl bridge effects, the plugging agent reacts with carboxyl and amido in polyacrylamide to form a three-dimensional net system, the viscosity is low before gel forming, the injection performance is good, a pipe column does not need to be moved during construction, the plugging agent preferentially enters a water channeling high flow guide channel, selective plugging is achieved, the pressure difference of an oil-water channel of a reservoir is adjusted after gel forming, and the streaming area is increased; the profile control agent has the advantages of being high in gelling strength, good in plugging effect, fast in pressure rising effect, small in dosage, short in construction period and capable of saving cost, and the prepared profile control agent is resistant to salt, scouring and shearing, good in stability and high in plugging capacity.

The present invention relates to the technical field of grouting materials, and in particular to a composite modified polyurethane grouting reinforcement material and its preparation method and application. The composite modified polyurethane grouting reinforcement material comprises component A and component B; in terms of mass fractions, the raw materials of component A comprise 60 to 80 parts of polymer polyol, 5 to 10 parts of carboxymethyl cellulose / silicon dioxide mixed solution, 0.5 to 2 parts of catalyst, and 20 to 30 parts of diluent; in terms of mass fractions, the component B comprises 90 to 100 parts of organic polyisocyanate, 0.5 to 1.5 parts of foam stabilizer, and 3 to 5 parts of plasticizer. The grouting reinforcement material of the present invention has low initial viscosity, good fluidity, good surface tension and permeability, timely cementation, and high bonding strength and toughness after solidification. It is suitable for reinforcement construction with complex on-site application conditions such as rapid and effective reinforcement of Class IV or Class V surrounding rocks such as siltstone or quicksand layers, rapid consolidation reinforcement of large falling blocks in the roof area, etc.

The invention belongs to the technical field of CO2 oil displacement and burying in the oil reservoir development technology, and discloses a CO2 induced reaction type tackifying poly-surfactant and a preparation method and application thereof, the CO2 induced reaction type tackifying poly-surfactant has a structure as shown in formula (1), x: y: z = 100: (30-150): (1-5); m is 1-7, n is 5-20, and R is selected from at least one of formulas (2) to (7); when CO2 is injected, the CO2-induced reactive tackifying poly-surfactant can induce hydroxyl and aldehyde groups of the CO2-induced reactive tackifying poly-surfactant to be subjected to a coupling reaction to generate gel, so that tackifying is achieved, and the channeling sealing effect is achieved; # imgabs0 #

The invention relates to the technical field of batteries, in particular to a dispersing agent and a preparation method and application thereof. The dispersing agent is a copolymer and comprises a main chain formed by copolymerization of an oil-soluble olefinic unsaturated monomer unit M1 and an olefinic unsaturated monomer unit M2 containing anhydride and / or carboxyl; the polymer side chain R1 is grafted on the M2 unit of the main chain and contains an ether bond and / or an ester bond; and the side chain R2 is grafted on the M2 unit of the main chain and contains an amide group. Wherein the polymer side chain R1 guarantees the long-term dispersion stability of the particles through a steric hindrance effect; the side chain R2 captures moisture and neutralizes acidic impurities through an amide group of the side chain R2, so that chemical passivation of the lithium supplementing agent is realized, and a gas production side reaction is inhibited from the source; and the main chain further optimizes the overall stability of an electrode interface by enhancing the compatibility of each component, so that the synergistic improvement of the processability, storage stability and electrochemical cycle performance of the slurry is realized.

The application discloses a water control blocking agent for edge and bottom water thickened oil reservoir, which is composed of the following components in percentage of the total mass of the water control blocking agent: water-soluble resin 3-40%, flexible polymer 0.1-5%, coagulant 0.01-1%, suspending agent 0.01-2%, and water as the balance. The application also discloses a preparation method of the water control blocking agent for edge and bottom water thickened oil reservoir, which comprises the following steps: (1) pouring water into a reaction container according to the formula, and then sequentially adding water-soluble resin, suspending agent, oxygen scavenger and toughening agent according to the formula, stirring for at least 20 minutes to obtain a first mixed solution; (2) adding flexible polymer to the first mixed solution according to the formula, stirring at room temperature for at least 4 hours until completely dissolved to obtain a second mixed solution; and (3) adding coagulant to the second mixed solution according to the formula, and continuing to stir for at least 30 minutes to obtain the water control blocking agent for edge and bottom water thickened oil reservoir.

The invention belongs to the field of adhesives, and provides PMMA (polymethyl methacrylate) glue with viscosity regulated and controlled by glacial acetic acid and a preparation method of the PMMA glue. According to the invention, a dual design of synergistic viscosity reduction of a PMMA matrix and free glacial acetic acid and slow release regulation and control of the PMMA-coated glacial acetic acid microcapsule is adopted, accurate regulation and control of the viscosity in a range of 500-50000 mPa.s are realized by controlling the dosage of glacial acetic acid in a range of 2-15 parts by mass, and meanwhile, the microcapsule component gradually releases glacial acetic acid in a glue drying process, so that the viscosity of the microcapsule is reduced, and the viscosity of the microcapsule is reduced. The viscosity rise caused by solvent volatilization is compensated, low viscosity, easy construction and high cohesion strength after drying are guaranteed, the problems that the construction performance and curing strength of traditional PMMA glue are difficult to balance, a high-solid-content system is difficult to defoam, and the storage viscosity stability is poor are solved, and the PMMA glue has wide industrial application value.

This invention discloses a temperature- and salt-resistant crosslinked polymer oil displacement agent and its preparation method, belonging to the field of petroleum extraction technology. It comprises two components: Component A and Component B. Component A is an aqueous solution of a quaternary copolymer, comprising, by mass percentage: 0.3%–0.8% quaternary copolymer, 0.1%–0.3% composite stabilizer, 0.05%–0.15% pH adjuster, with the balance being formation water. Component B is an aqueous solution of a composite crosslinking agent, comprising, by mass percentage: 0.2%–0.6% organoboron crosslinking agent, 0.1%–0.4% phenolic resin crosslinking agent, 0.05%–0.2% amino-modified nano-silica, with the balance being formation water. This invention employs quaternary copolymerization technology, simultaneously introducing sulfonic acid groups, pyrrolidone rings, and acid anhydride groups into the polymer molecular chain. The sulfonic acid group is insensitive to divalent cations and can significantly improve the salt resistance of the polymer; the pyrrolidone ring has good thermal stability and hydrolysis resistance; the acid anhydride group can react chemically with the amine-modified nano silica to form chemical crosslinking points.

The invention discloses a plastic material for coal mine underground plugging and a preparation method thereof.The material is composed of a material A, a material B and a material C. The material A is prepared from, by mass, 30-50 parts of self-made gelling agent and 50-70 parts of water; the material B comprises the following components in parts by mass: 6-9 parts of potassium carbonate, 3-6 parts of sodium carbonate and 85-90 parts of water; the material C comprises the following components in parts by mass: 10-15 parts of white calcium bentonite; the material is free of temperature rise in reaction, rapid in reaction, good in diffusion and permeability, excellent in adhesion and plugging performance and good in plasticity, and can keep a negative pressure state for a long time after negative pressure pumping; during application, three components are pumped at the same time, operation is easy, performance is excellent, and wide application prospects are achieved.