344results about How to "High apparent viscosity" patented technology

The invention discloses a temperature resistant salt tolerant high efficiency gel and a preparation method and application thereof. The preparation method is characterized in that the preparation method comprises the following steps: preparing a comb-shaped associated copolymer PAH containing macromonomers and functional hydrophobic monomers into an aqueous solution having the concentration of 0.1 to 4g / L, the crosslinking agent concentration of 0.01 to 1.0g / L, the surfactant concentration of 0.01 to 8mmol / L and the sodium sulfite thermal stabilizer concentration of 0.005 to 1.0g / L; adding the aqueous solution into a mixing container with a stirring device; stirring the aqueous solution evenly at the room temperature; regulating the pH value of the solution to be equal to between 4 and 11, and obtaining a temperature resistant salt tolerant high efficiency gel polymer solution system used for tertiary oil recovery and scavenge, displacement modification, profile modification or water shutoff. The polymer solution system has micro-crosslinking to form the gel during the flowage inside the oil reservoir. The gel has good elasticity, not easy dehydration, stable gelling performance, and excellent tackification, temperature resistance, salt tolerance, shearing resistance and ageing resistance.

The invention discloses an acrylamide modified graft copolymer and a preparation method and usage thereof. The invention is characterized in that 20 parts of acrylamide, 1-20 anionic monomer and / or cationic monomer, 0.1-15 macromonomer, 0.05-10 ionic lyophobic monomer and 50-1000 deionized water are added into a three-necked reaction bottle, the pH value is adjusted to be 3-9, N2 is introduced for 30min, then 0.002-0.5 part of initiator persulfate is added at 30-75 DEG C, the reaction lasts 8-36h, then copolymer PAB is obtained, and finally water is used for dilution to obtain strong PAB solution. During polymerization, no surfactant is used, and the macromonomer with a long chain and the ionic lyophobic monomer with intermolecular association function are introduced into the copolymer PAB, so the capabilities of cooperative tackification and salt-resistance between the rigid conformation of a molecular chain and the intermolecular association can be played optimally, the PAB exhibits unique solution property and has higher colloidal viscosity in high saline solution than in fresh water, and the PAB obtains the capabilities of tackification, salt resistance, low surface tension and strong molecular association and can be used for the oil-displacing acrylamide modified graft copolymer. The copolymer is prepared into water solution with mass concentration of 0.2-3.0g / L and surfactant concentration of 0.01-2 mmol / L, then the water solution is added into a mixing vessel by a stirring device, and then a polymer oil-displacing agent with tackification, salt resistance and cutting resistance is obtained. The PAB has the functions of both a tackifier and a macromolecule surfactant. The copolymer PAB is prepared into water solution which has mass concentration of 0.05-7%, so the macromolecule surfactant with excellent surface activeness can be obtained and then applicable to an emulsifier, an emulsion splitter, a solubilizer and a wetting agent.

The invention discloses acrylamide modified polymer micro-crosslinking gel and a preparation method thereof. The preparation method is characterized in that the method comprises the following steps that: acrylamide modified polymer PAE containing functional macro monomer is prepared into an aqueous solution with the concentration between 0.1 and 4g / L, the concentration of crosslinking agent between 0.01 and 1.0g / L, the concentration of surface active agent between 0.01 and 8mmol / L and the concentration of heat stabilizer sodium sulfite between 0.005 and 1.0g / L; the aqueous solution is added in a mixing container with a stirring device and is stirred evenly at room temperature; the pH value of the solution is adjusted between 4 and 11 to prepare a polymer solution system of the acrylamide modified polymer micro-crosslinking gel used for tertiary oil recovery and displacement, oil displacement modification, profile modification or water plugging; and the polymer solution system undergoes micro crosslinking during flowing inside an oil layer to form the gel. The acrylamide modified polymer micro-crosslinking gel has ideal elasticity, difficult dehydration, stable performance and excellent performances on tackifying, temperature resistance, salt resistance, shearing resistance and ageing resistance.

The invention discloses a water soluble copolymer with high viscosity and salt resistance, and a preparation method and an application thereof. The preparation method comprises the steps of: adding acrylamide 20 weight parts, an anionic monomer or / and a cationic monomer 0.1-15 weight parts,, a vinyl polycyclic aromatic hydrocarbon 0.05-4 weight parts,, a surfactant 0.5-90 weight parts,, and deionized water 70-900 weight parts, into a three-neck reaction bottle, adjusting the solution pH to 2.5-9, introducing N2 for 30min, adding an initiator persulfate 0.001-0.2 weight parts, at 20-70DEG C, and reacting for 6-36 hours to obtain a low-molecular weight water soluble copolymer with molecular association ability, high viscosity and salt resistance, which can be used in intermediate-permeability oil reservoir and low-permeability oil reservoir development. An associated water soluble polymer oil displacement agent is obtained by preparing the copolymer into an aqueous solution with copolymer concentration of 0.3-3 g / L and surfactant concentration of 0.01-4 mmol / L, adding into a mixer with a stirring device, and stirring uniformly at room temperature; and the obtained oil displacement agent has high viscosity, salt resistance, temperature resistance and shear resistance, and can be used in intermediate-permeability oil reservoir and the low-permeability oil reservoir development.

The invention discloses a non-linear associated water soluble quadripolymer as well as a preparation method and use thereof, comprising: adding 20 parts of acrylamide, 1-20 parts of nionic monomer or / and cationic monomer, 0.1-15 parts of macromonomer, 0.05-10 parts of hydrophobic monomer, 0.1-50 parts of surfactant and 60-1000 parts of deionized water to a three-necked reaction flask, adjusting the pH to be 3-9, adding 0.002-1 part of initiator (persulphate) at 30-75 DEG C after introducing N2 for 30min, reacting for 8-36h to obtain the quadripolymer PACH, diluting with water, and obtaining concentrated PACH solution. The macromonomer with a long chain and the hydrophobic monomer with a molecular association function are simultaneously introduced in a copolymer PACH, which can obtain the best synergistic viscosifying between rigid conformation of a molecular chain and molecular association and salt resistance. The non-linear associated water soluble quadripolymer is obtained. The copolymer is prepared into aqueous solution with the mass concentration of 0.2-3g / l and the surfactant concentration of 0.01-2mmol / l, added to a mixing vessel with a stirring device and evenly stirred at the room temperature to obtain a viscosified, salt-resistant and shear-resistant polymer oil displacement agent. The PACH has dual functions of a viscosifier and a high molecular surfactant; minute amount of a low molecular surfactant is added to the PACH solution, thus improving the apparent viscosity of the solution, reducing the surface tension of solution and the water-oil interfacial tension, and being beneficial to improving the crude oil recovery ratio. A copolymer PABE is prepared into the aqueous solution with the mass concentration of 0.05-7% to obtain high molecular surfactant with excellent surface activity, and the high molecular surfactant is used as an emulsifier, a demulsifier, a solubilizer and a wetting agent.

The invention discloses a comb-type structural reactive polymer with the molecular weight ranging between 1x10<5> and 5x10<6>, wherein the main chain of the reactive polymer is obtained through the copolymerization of acrylamide monomer and functional monomers such as 2-acrylamido-2-methylpropanesulfonic acid and acrylic acid sodium salt, etc., which endues polymer aqueous solution with higher apparent viscosity and better temperature resistance and salt resistance; and the branched chain of the reactive polymer consists of unsaturated macromonomer molecule, which endues the polymer aqueous solution with higher surface activity. The invention also discloses a preparation method for the polymer, comprising the following steps: firstly, through process operation including esterification, prepolymerization and sulfonation, polyurethanes active macromonomer with a novel structure is prepared; then, under the action of oxidation reduction initiator, the copolymerization reaction of the active macromonomer and other functional micromolecule monomers is initiated quickly at low temperature. The comb-type structural reactive polymer can be used as oil displacement agent and has the advantages of high molecular weight and low surface tension, etc.

The invention relates to a fluorocarbon surfactant binary composite foam flooding system. The system is prepared by adopting fluorocarbon surfactant as a foaming agent, adopting a macromolecular compound as a foam stabilizer and adding water; the foaming agent is one or combination of sulphobetaine type fluorocarbon surfactant and amine oxide type fluorocarbon surfactant, or combination of alpha-alkenyl sulfonate and one of sulphobetaine type fluorocarbon surfactant and amine oxide type fluorocarbon surfactant; and the foam stabilizer is partially hydrolyzed polyacrylamide, polyvinyl pyrrolidone K30, polyvinyl pyrrolidone K90 or hydroxyethyl cellulose. An application method comprises that solution of the fluorocarbon surfactant binary composite foam flooding system and nitrogen are alternately injected into a stratum or a rock center so as to improve the recovery rate of crude oil.

The invention relates to a preparation method of a functional polyester fiber. The preparation method comprises the following steps: performing esterification by stages, wherein dihydric alcohols, polyhydric alcohols and functional inorganic powder are mixed according to a certain mole ratio, in the first esterification stage, acid is slightly excess to ensure that monomers with low capability of participating in esterification reaction in the polyhydric alcohols fully react and are grafted into polyester molecular chains, and in the second esterification stage, the dihydric alcohols are replenished to control the terminal carboxyl group of copolyester. The preparation method has the advantages that polyhydric functional groups can improve the apparent viscosity of a system and play a role in wrapping the introduced functional inorganic powder (such as far infrared ceramic inorganic powder, titanium dioxide powder and zinc oxide antibacterial powder), thus improving the dispersion uniformity of particles; settlement is unlikely to happen in the polymerization process and then functional polyester is prepared through condensation polymerization; the functional polyester fiber is finally prepared by carrying out melt spinning on the prepared polyester, has good moisture absorption property and flexibility and can be widely used for preparing far-infrared moisture absorbing and sweat releasing antistatic and antibacterial fabrics next to the skin.

The invention relates to the technical field of heavy oil recovery, in particular to a foam agent system used for switching water drive into steam drive of a heavy oil reservoir or steam huff and puff to improve the oil recovery efficiency. According to the technical scheme, the temperature-resistant and salt-tolerant foaming agent system for thermal recovery of the heavy oil reservoir is characterized by comprising a foaming agent base, a foam stabilizer, a foam fixing agent, a foam promoter, an alkali substance, inorganic salt and a solvent. The foaming agent system can resist the temperature of 350 DEG C and has good thermal stability and better foamability; the foaming agent base in the system is lower than the critical micelle concentration and can produce more foam, the apparent viscosity is substantially increased, and the cost is saved; the foaming agent system has better solubility, causes little damage to formation and is environment-friendly.

The invention provides a thermothickening terpolymer and its preparation method. The water solution viscosity of the copolymer provided in the invention increases with the rise of temperature within a certain temperature range. The water solution of the copolymer has a thermothickening property, and has high apparent viscosity under high temperature and high salinity conditions. Thus, the terpolymer of the invention boasts good application prospects in tertiary oil recovery of high temperature and high salinity oil reservoirs.

The invention relates to a three-phase foam complex oil flooding system and application thereof. The three-phase foam complex oil flooding system consists of a foaming agent, a foam stabilizer, water and gas, wherein the foaming agent and the foam stabilizer are uniformly dispersed into the water to form an oil flooding system solution; the proportion of components is as follows: the foam stabilizer is 0.1-0.3% in percentage by mass, and the foaming agent is 0.1-0.4% in percentage by mass; the gas is nitrogen, carbon dioxide or natural gas; the volume ratio between the oil flooding system solution and the gas is 1:(1-1.5), and the oil flooding system solution and the gas are alternately injected into the stratum or rock cores. The three-phase foam complex oil flooding system disclosed by the invention can be used for reducing the liquid discharge speed of a liquid membrane, increasing the viscoelasticity and strength of the liquid membrane, and ensuring that the foam is more stable, has good oil flooding effects, and can be used for enhancing the oil recovery.

The invention discloses a comb-type amphipathicity water-solubility multipolymer and a method for making the same as well as an application. The method is characterized in that: 20 portions of acrylamide, 0.1 to 10 portions of negative ion monomer, 0.5 to 15 portions of at least one of the surface activity macromolecular monomer 4-vinyl benzyl alkylphenol polyoxyethylene ether or / and allyl alkylphenol polyoxyethylene ether and 30 to 600 portions of deionized water are added into a three-necked reaction bulb, the pH value of the solution is adjusted to between 4 and 9, N2 is introduced into the solution for 30 minutes, 0.002 to 0.3 portion of evocating agent sulphate is added at the temperature of between 30 and 70 DEG C to react 12 to 36 hours in order to prepare PABE which is diluted by water to obtain the PABE strong solution; the comb-type amphipathicity water-solubility multipolymer which can viscosify, has salt resistance and the low surface tension as well as the molecular association ability and can be used for the fuel scavenge. The multipolymer is prepared into a water solution with a mass concentration between 0.3 and 3g / L and a surface active agent concentration between 0.01 and 2mmol / L, the water solution is added into a blending container with a stirring device and is stirred evenly at room temperature so that the polymer oil-displacing agent which can viscosify and shear-resistant and has excellent anti-aging performance in a hyperhaline state and at the temperature of 70 DEG C. The PABE has the double function of a tackifier and a macromolecule surfactant. Infinitesimal low molecular surface active reagent is added into the PABE solution, thereby evidently increasing the apparent viscosity of the solution, reducing the surface tension and the oil-water boundary tension of the solution and contributing to improving the recovery ratio.

The invention discloses a copolymer with temperature resistance and water solubility and the preparation method and application thereof, which is characterized in that: 20 portions of acrylic amide, 0.1 to 10 portions of anion monomer or / and cation monomer, 0.05 to 3 portions of fluorine-containing styrene or / and perfluoroalkyl styrene hydrophobic monomer, 0.5 to 60 portions of surface active agent and 50 to 700 portions of deionized water are put into a three-necked reaction bulb; after the solution pH is regulated to be equal to 2.5 to 9 and N2 is connected for 30 minutes, 0.001 to 0.2 portion of an evocating agent of persulfate is added under temperature of 20 to 70 DEG C, reacting for 6 to 36 hours, and PATF is prepared. Then water is used for diluting so as to prepare PATF concentrated solution, thus obtaining a copolymer that has medium molecular weight and water solubility, is high-temperature resistant, has an ability of molecular association and can be used in high temperature and high salinity reservoir. The copolymer is prepared into aqueous solution with a mass concentration of 0.3 to 3g / L and a surface-active-agent concentration of 0.01 to 4mmol / L, which is put in a blending container with a dasher and is stirred even at room temperature to prepare a polymer oil-displacing agent which is high-temperature resistant, high tackifying and anti-sharing and has excellent aging resistance under high salinity and the temperature of 110 DEG C. The prepared oil-displacing polymer has excellent solution properties owing to the supermolecular structure formed by the association between molecules of fluorine-containing cinnamene or / and alkylbenzene hydrophobic groups, thus having favorable application prospects in high temperature and high salinity reservoir exploitation.

The invention relates to long-carbon-chain amide glycine betaine clean fracturing fluid and a preparation method thereof. The glycine betaine amphiprotic surface active agent long-carbon-chain (more than 18 carbons) amide glycine betaine is used as a main agent, the carbon chain of the glycine betaine is long, the glycine betaine is dissolved in the water and is likely to form gel after being stirred, so that the fracturing fluid is good in viscosity. In addition, the clean fracturing fluid by adopting the long-carbon-chain (more than 18) amide glycine betaine as the main agent adsorbs less rock stratum, the consumption of the surface active agent is effectively reduced, the calcium resistance is strong, the gel is thorough to break, no residue exists, and the harm on the stratum is small. The prepared long-carbon-chain amide propyl glycine betaine clean fracturing fluid can be well applied to an oil field and plays an important role in increasing the yield of the oil-gas field.

The invention discloses an acrylamide copolymer and its preparation method and application. The acrylamide copolymer contains a structural unit A, a structural unit B and a structural unit C. the structural unit A is a unit with a structure as shown in the formula (1) and / or the formula (2); the structural unit B is a unit with a structure as shown in the formula (3) and / or the formula (4); and the structural unit C is a unit with a structure as shown in the formula (5) and / or the formula (6). In addition, with the total mole number of the structural units in the acrylamide copolymer as the reference, the structural unit A accounts for 5-25 mol%, the structural unit A accounts for 60-90 mol%, and the structural unit C accounts for 1-30 mol%. Viscosity-average molecular weight of the acrylamide copolymer is 1-10 million. The acrylamide copolymer has excellent thickening performance under conditions of high temperature and high salinity, and gel formed after crosslinking has good shearing resistance.

The invention relates to a preparation method of partially hydrolyzed polyacrylamide with improved temperature and salt resisting performances by using a template polymerization mode. The polymerization initial temperature of the partially hydrolyzed polyacrylamide is controlled to be 0-15DEG C at which template materials are more remarkably acted with functional monomers of polymerization monomers to facilitate the forming of a polyacrylamide product with a block structure; by adopting the template polymerization at the polymerization phase, polymer colloid particles have superhigh molecular weight and maintain favorable dissolving performance at the same time; and by using the temperature of the polymer colloid particles during generation, NaOH is added for hydrolysis during discharge. The number average molecular weight of the partially hydrolyzed polyacrylamide disclosed by the invention can reach 25-32 millions; meanwhile, compared with a random copolymerization product, the high polymer structure has more ordered block sequence structure, so that the partially hydrolyzed polyacrylamide has favorable dissolving performance; in addition, higher viscosity can be maintained in saline water with high temperature and high salinity.

The invention provides an amphipathic polymerizable monomer with a structure shown as a formula (I), and further provides a preparation method for the amphipathic polymerizable monomer and an amphipathic tackifying copolymer. The amphipathic polymerizable monomer has high amphipathy, and has a self-solubilizing function when used for preparing a polymer; a copolymer with an amphipathic micro block structure and high solubility can be obtained without adding any surfactant; the amphipathic polymerizable monomer belongs to a derivative of acrylamide, and is easy to copolymerize with an acrylamide monomer; and two hydrogen atoms on acidamide N are substituted, so that the hydrolytic resistance of the acidamide N and the copolymer are enhanced, and the high-temperature stability of the copolymer is enhanced. The amphipathic tackifying copolymer has a simple preparation process, and can be prepared without adding a large quantity of surfactants, and the production cost is greatly lowered.

The invention discloses supramolecular polymer clean fracturing fluid resistant to high temperature of 170 DEG C. The fracturing fluid is prepared from the following components in percentage by weight: 0.2 to 0.5 percent of thickening agent for the clean fracturing fluid, 0.1 to 0.5 percent of viscosity synergist, 0.2 to 0.4 percent of structural intensifier, 0.05 to 0.2 percent of deoxidant, 0.1 to 0.3 percent of metal ion chelating agent, 1 to 2 percent of clay stabilizer and the balance of fresh water. According to the clean fracturing fluid, a reversible supramolecular network structure is formed through the intermolecular interaction, and the thickening agent is low in use concentration and can be used for effectively controlling the viscosity of a base solution of the fracturing fluid and improving the pumping performance of the fluid; viscoelastic sand-carrying of the fracturing fluid is realized by low viscosity and high viscoelasticity; the temperature resistance can reach 170 DEG C under a long-term shear condition; the shear resistance is excellent, and the fluid viscosity and the structure after high shear can be effectively recovered; the construction friction is low, and the equipment load and the fracturing construction risk are reduced; the residue content is low, so that the damages to a reservoir stratum and prop fractures are greatly reduced, and the fracturing stimulation effect is greatly improved.

The invention relates to an oil-displacing agent composition for improving a recovery ratio of a high-temperature reservoir and a preparation method of the composition, mainly solving the problems that a polymer-containing oil-displacing agent in the prior art is poor in temperature resistance, salt resistance and thermal stability resistance, and low in displacement efficiency. In order to solve the problems better, a following technical scheme is adopted as follows: the oil-displacing agent composition comprises the following components in percentage by weight: 0.005%-8.0% of high-temperature-resistant and oil-displacing acrylamide polymers, 0.005%-5.0% of a fatty alcohol polyoxyethylene ether carboxylate surfactant and 87.0%-99.99% of injected water. The preparation method of the oil-displacing agent composition comprises the following steps: regulating a pH value; ventilating a nitrogen gas and removing an oxygen gas; carrying out hydrolysis reaction; drying, crushing and sieving to obtain acrylamide polymers; stirring the acrylamide polymers, the fatty alcohol polyoxyethylene ether carboxylate and the injected water for 0.5 hour-5 hours at 5 DEG C-45 DEG C, and uniformly mixing to obtain the oil-displacing agent composition. And therefore, the oil-displacing agent composition can be used for tertiary oil recovery production of the high-temperature reservoir.

The invention provides a salt-responsive high-temperature-resistant zwitterionic polymer filtrate reducer and a preparation method and application thereof. The filtrate reducer is prepared from the following raw materials in parts by mass: 2 to 40 parts of N, N-dimethylacrylamide, 2 to 20 parts of methacryloxyethyl trimethyl ammonium chloride, 2 to 20 parts of 2-acrylamide-2-methylpropanesulfonicacid, 4 to 8 parts of nano oxide, 1.0 to 1.5 parts of silane modifier and 0.3 to 0.4 part of an initiator. The salt-responsive zwitterionic polymer provided by the invention has a special polyelectrolyte resistance effect and positive response to salt, essentially realizes conversion from salt resistance to salt response, and is essentially compatible with salt, the obtained filtrate reducer has excellent salt resistance, temperature resistance and filtrate loss reduction performance, and also has shear dilutability.

The invention discloses a high-temperature-resistance low-friction weighted clean fracturing fluid which is suitable for high-temperature and high-pressure reservoir reconstruction at 170 DEG C and a preparation method thereof.The fracturing fluid is prepared from, by weight, 0.2%-0.8% of high-temperature-resistance thickening agent, 0.1%-0.8% of system synergist, 0.1%-0.3% of high temperature stabilizer, 0%-42% of weighting agent and the balance fresh water.The high-temperature-resistance low-friction weighted clean fracturing fluid has the following functions and advantages that the weighting agent can be adopted for weighting, and the density is adjustable between 0 and 1.32 g / cm<3>; good temperature-resistance and anti-shearing properties are achieved, and the requirement of high-temperature deep well fracturing construction at 170 DEG C can be met by adjusting a formula; a good resistance reduction property is achieved, pipeline friction resistance can be effectively reduced, and the resistance reduction rate can reach 70%; the fracturing fluid is a fluid with a reversible structure, and the structure damage after high shearing is small; the residue content of the fracturing fluid is decreased to below 10 mg / L, damage to a reservoir and supporting cracks is reduced, the fracturing effect is improved, and the reservoir productivity is increased.

The invention discloses a special thickening and efficiency-improving aid for ammonium glyphosate. The aid comprises the following components by weight: 10 to 30% of a quaternary ammonium salt cationic surface active agent, 40 to 70% of amine oxide, 2 to 5% of a short-carbon-chain alcohol solvent, 10 to 30% of a non-ionic surface active agent alkyl glycoside and 0.5 to 2% of a weakly acidic pH regulator, with the balance being water. A preparation method for the aid comprises the following steps: uniformly mixing the quaternary ammonium salt cationic surface active agent with the short-carbon-chain alcohol solvent under full stirring; then adding the alkyl amine and the weakly acidic pH regulator and carrying out uniform mixing under stirring once again; and finally adding the non-ionic surface active agent alkyl glycoside, supplementing the balancing water and carrying out uniform mixing under stirring. The special thickening and efficiency-improving aid provided in the invention has the advantages of a wide application scope, stable performance, good thickening and efficiency-improving effects, etc., and can not only effectively improve the apparent viscosity of an ammonium glyphosate water aqua, but also significantly improve the efficacy of the ammonium glyphosate water aqua.

The invention provides a polymer-thickened non-Newton aircraft deicing / anti-icing liquid, comprising the following components based on weight percentages: 45%-65% of freezing point depressant, 0.05%-5% of thickening agent, 0.05%-5% of neutralizing agent, 0.05%-5% of viscosity control agent, 0.05%-5% of corrosion inhibitor, 0.05%-5% of surfactant, and the balance liquid. The preparation method of the invention comprises: sequentially adding the freezing point depressant, the thickening agent, the neutralizing agent, the viscosity control agent, the corrosion inhibitor and the surfactant to solvent, respectively stirring and dissolving to obtain the product. The polymer-thickened non-Newton aircraft deicing / anti-icing liquid has the characteristics of high apparent viscosity, slowly reduced viscosity after shearing treatment, excellent anti-icing property and good dynamic performance. After anti-icing treatment via the product, the outer surface of an aircraft can not be refrozen and frosted within a very long time range, thus effectively avoiding a refreezing phenomenon of the aircraft during the delay period in an airport, and guaranteeing normal flight of the aircraft under an ice and snow weather.

The invention discloses an electric field electrorheological jet polishing device. The electrorheological jet polishing device comprises a work chamber, a rotary table, a machine tool, a jetting device, a filter, a stirring tank, a cooling device, a boosting device, flow guide pipes and an electrorheological polishing liquid. The machine tool does three-dimensional linear movement; the jetting device is fixed on a horizontal moving shaft driving device and faces the object carrying tabletop of the rotary table; the jetting device and the object carrying table of the rotary table are sealed by the work chamber; the filter is arranged between the work chamber and the stirring tank; the cooling device is arranged on the outer wall of the stirring tank; a boosting system is arranged between the jetting device and the stirring tank; and all parts of a system are connected through the flow guide pipes to form a liquid loop. When the electrorheological jet polishing device is in work, the electrorheological polishing liquid is boosted by the boosting device, input into the electrified jetting device, shaped by the jetting device and subjected to an electrorheological effect to form stable standard straight jets for polishing a workpiece; and waste liquid can be recycled for use after treatment. The electric field electrorheological jet polishing device combines an electrorheological polishing technology and a jet polishing technology and belongs to the domain of optical fine machining.

A seven-level adjustable reciprocating type electrorheological fluid damper mainly comprises a positive-pole conducting wire, a negative-pole conducting wire, a positive-pole piston cylinder cover, a negative-pole piston cylinder cover, positive-pole conducting rubber, negative-pole conducting rubber, a piston rod, an insulating piston cylinder, a positive pole, a negative pole, a backflow control path, a small piston, a middle piston, a large piston and electrorheological fluid. The positive-pole conducting rubber and the negative-pole conducting rubber replace sealing materials and play a role in sealing and conducting. Installation forms of the small piston, the middle piston and the large piston are determined by borne damping force, wherein when the damping force is large, stress is not clear, and movement speed is high, the dual-piston or three-piston form is adopted; when the damping force is small, the single-piston form is adopted. The backflow control path replaces a throttling control valve, no external electric field exists, the electrorheological fluid bears the force and flows between the positive pole and the negative pole through the backflow control path, and the seven-level adjustable reciprocating type electrorheological fluid damper is a hydraulic damper; when an external electric field is applied and shearing efficiency is high, apparent viscosity of the electrorheological fluid of the backflow control path changes, the section area of the backflow control path becomes smaller, the backflow control path is even blocked completely, and the electrorheological fluid effectively controls an engineering system by proving shearing force and extruding force.

The present invention provides a modified AMPS / AM / acrylate ternary copolymer and a preparation method thereof. The method comprises: (1) purifying an AMPS crude product to achieve a content of an impurity MPS of less than or equal to 100 ppm, (2) preparing acrylamide and the purified AMPS monomer aqueous solution, and adopting an inorganic basic compound to adjust the pH value to 5-10 to obtain an AM / AMPS salt aqueous solution, (3) under an aqueous solution polymerization condition, in the presence of an initiation system and under the protection of an inert gas, carrying out polymerization on the AM / AMPS salt aqueous solution, and (4) carrying out granulation on the reaction product obtained from the step (3) to obtain colloidal particles, and carrying out contacting of the colloidal particles, sodium hydroxide and carbon disulfide, wherein the initiation system comprises a water-soluble azo initiator, an amine reducing auxiliary agent, a sulfite reducing agent and an oxidizing agent. The invention further relates to applications of the modified ternary copolymer. The modified ternary copolymer has high apparent viscosity and high apparent viscosity retention rate.

The invention discloses a preparation method of an associated modified xanthan gum, which is characterized by adding 20 parts of xanthan gum with a medium or low molecular weight, 10-900 parts of solvents, and 0.01-15 parts of catalysts, on a weight basis, into a three-mouth reaction bottle equipped with a reflux condensation device, stirring and swelling the mixture at room temperature for 24 hours; then increasing the temperature to 30-95 DEG C, slowly adding 0.1-20 parts of phenyl ring-containing chlorinated hydrocarbon modifiers, and reacting for 4-72 hours; precipitating and washing the products by acetone, n-propanol or isopropanol to remove unreacted modifiers and catalysts, and filtering; drying in a vacuum oven at 30-70 DEG C for 4-8 hour so as to obtain the associated modifiedxanthan gum. Compared with unmodified xanthan gums, the associated modified xanthan gum has better tackifying performance, heat resistance, salt resistance, and aging resistance, and has a lower using amount. The associated modified xanthan gum with a medium or low molecular weight can be used as an oil displacement agent for tertiary oil recovery in medium and low-permeability oil reservoir, andcan also be used as a thickening agent in drilling fluid; the associated modified xanthan gum can be crosslinked with an inorganic or organic agent to obtain a weak gel used as an oil displacement agent, a profile control and oil displacement agent, a profile control agent, or a plugging agent.

The invention provides a rotary magnetic pole magnetorheology polishing device used for polishing the inner wall of a pipe-like workpiece. The rotary magnetic pole magnetorheology polishing device comprises a magnetorheology liquid feeding system, a workpiece supporting and driving mechanism and a magnetic pole rotating mechanism. Under the effect of a liquid pressure pump, magnetorheology liquidis pumped in an inner cavity of a pipe fitting from a liquid input pipe on a pipe fitting clamping device, by means of high pressure generated by the pressure pump, the magnetorheology liquid flows fast in the inner cavity of the pipe fitting, when flowing through a polishing area, the magnetorheology liquid generates the rheology effect due to the influence of the intensity of a magnetic field, shear yield stress and apparent viscosity are increased fast, under reciprocating motion of the workpiece and rotating motion of a rotating magnetic frame, compound motion between the workpiece and themagnetorheology liquid is achieved, and removal of materials on the inner surface of the workpiece is completed. The invention further provides a method adopting the device for carrying out polishing. The polishing device can polish the inner wall of a thin short non-magnetic pipe automatically, and has the advantages of being simple in structure, uniform in polishing, high in efficiency, high incontrollability of the polishing process, free of surface damage and the like.

The invention discloses a compound type yoghurt stabilizer and a preparation method thereof, which belong to the technical field of yoghurt stabilizer preparation. The compound type yoghurt stabilizer is prepared by taking modified dietary fibers with high water holding capacity, expansibility, thickening property and adsorptivity as well as abundant grid structure as main raw materials, scientifically compounding a plant extract and protein hydrolysate which contain high-content natural antifreeze peptides, Chinse herbal medicinal extracts with cold and heat stress resistance, sodium carboxymethylcellulose, pectin, tremella polysaccharide, transglutaminase and other food raw materials and refining; the prepared compound type yoghurt stabilizer has the advantages that the quality problems about low viscosity, rough texture, poor mouthfeel, whey separating and the like in the late-stage storage process of yoghurt are solved; in addition, the viable content of lactic acid bacteria in the yoghurt is obviously improved, and the shelf life is prolonged to over twenty-one days; besides, the yoghurt is good in solidifying state, and is suitable for long-distance transportation.