Method for preparing blocked allyl polyether

The invention relates to a method for preparing blocked allyl polyether and mainly aims to solve the problem that the water generated by the etherification in the prior art results in the decomposition of the blocking agent. To solve the problem, the invention adopts the technical scheme comprising the following steps of: (1) adding hydroxyl terminated polyether and alkali metal hydroxide with mole ratio of 1: 0.5 to 5 to organic solvent, then making the mixture react for 0.5 to 15 hours at the azeotropic temperature of the organic solvent and the water, and separating the generated water by the azeotropic reaction of the organic solvent and water to prepare the solution of polyether polyol alkali metal salt; (2) reducing the temperature of the solution prepared in the step (1) to 40 to 80 DEG C, adding halide to the reaction system, etherifying the mixture for 0.5 to 15 hours at the reaction temperature of 80 to 150 DEG C, carrying out the reduced pressure distillation, filtering anddesalting ...

Composition for improving recovery efficiency of tertiary recovery, and preparation method and use thereof

The invention relates to a composition for improving the recovery efficiency of tertiary recovery, and a preparation method thereof. The problems of bad temperature and salt resistance and low oil displacement efficiency of polymer-containing oil displacement agents in the prior art are solved in the invention. The oil displacement composition for tertiary recovery comprises 0.01-5.0wt% of a temperature and salt resistance copolymer NWKY-PAN, 0.01-5.0wt% of a fatty alcohol polyoxyethylene ether carboxylate surfactant and 90.0-99.98wt% of injected water. The above technical scheme can well solve the problems, and the composition can be used in the tertiary recovery production of oilfields to improve the recovery efficiency.

Manufacturing method of traffic sign line sticker

The invention relates to a manufacturing method of a traffic sign line sticker. The manufacturing method comprises the steps that (1) pure aluminium is selected and laminating is conducted through an automatic combination machine; (2) adhesive stickers are selected, gumming is conducted on a film through an automatic gumming machine, and a debonding film is added; (3) spraying is conducted to form bottom oil through an automatic coating machine; (4) when paint is not dry, reflective glass beads are laid, and drying is conducted; (5) after the bottom oil is dry completely, transparent paint is added, and drying is conducted again; (6) slitting is conducted, and the debonding film is debonded and rolled. The method has the advantages that on-site laying can be conducted, aging resistance is achieved, service life is long, manufacturing cost is low, better abrasion resistance is achieved, surface friction force is large, color stability is good, and laying is convenient.

Initiator composition used for preparing oil displacing agent of polymer used in tertiary oil recovery

The invention relates to an initiator composition used for preparing an oil displacing agent of polymer used in tertiary oil recovery, and mainly solves the problems in the prior art that in polyacrylamide polymers prepared from a conventional redox initiator, the initiating rate is high, the reaction is not controllable, and the relative molecular mass of polymer contradicts with solubility. According to the invention, a compound redox initiator composition is adopted, and comprises the following components in weight percentage: 1) 0.05-40% of persulfate salt, 2) 0.1-60% of aqua ammonia, urea, or thiourea, 3) 0.01-60% of aliphatic primary amine compound represented by the formula of NH2R1, aliphatic secondary amine compound represented by the formula of NHR2R3, aliphatic tertiary amine compound represented by the formula of NR4R5R6, or aliphatic quaternary amine compound represented by the formula of N<+>R7R8R9R10. The problems are excellently solved, and the initiator composition can ...

Power support capacity distribution method of different DC lines in multi-DC system

The invention discloses a power support capacity distribution method of different DC lines in a multi-DC system, and belongs to the technical field of an electric power system and automation thereof. The method comprises: calculating the contribution of the different DC lines in improving transient power angle stability, the DC line maximum voltage controllable amount satisfying voltage safety constraints, and a support capacity integrated contribution index of each DC line, then determining a power support capacity distribution mode, and performing power support capacity distribution on each DC line. The method provided by the invention can be used for solving the problems of priority order determination and support capacity distribution of DC emergent power support of a multi-DC system, is helpful in fully utilizing the controllability characteristic of the DC system, improves transient stability of the system, prevents motor tripping or reduces motor tripping, and improves operation ...

Wind power plant reactive voltage cluster control method based on multi wind turbine mutual aid

The invention discloses a wind power plant reactive voltage cluster control method based on multi wind turbine mutual aid, and belongs to the technical fields of an electric power system and the automation. According to the invention, different control policies are used for a double-fed asynchronous generator set and a permanent magnet synchronous generator set in a wind power plant by monitoring the grid connection point voltage; when the grid connection point voltage deviates from a normal work range, the existing low voltage ride though control policy is used for the double-fed asynchronous generator set, while a reactive support control policy is used for the permanent magnet synchronous generator set; by monitoring the grid connection point voltage, the operation modes of different wind turbines in the wind power plant are adjusted in real time; without adding hardware, reactive voltage balance of the existing wind power plant is realized by changing the wiring topologies of the double-fed ...

Method for preparing glycerol micro-crosslinking polyester ether elastic fiber

The invention relates to glycerin micro cross linking polyether ester elastic fiber manufacturing method. It includes the following steps: ester interchange reaction that using dimethyl terephthalate, polytetrahydrofuran ether glycol, 1, 4-butanediol as material, adding 0.1-2.5% molar fraction glycerin, vacuum pumping at 50-100 deg.C, reacting at 180-200 deg.C; poly-condensation reaction that reacting at 230-250 deg.C for 3-4h below 80Pa and under the protection of nitrogen gas; melt spinning. This technology is simple. In addition, the prepared fiber has even size, good elastic recovery, low cost, suits for industrialization production.

Method for preparing nano TiO2 polyester ether elastic fiber

The invention relates to nanometer TiO2 polyether ester elastic fiber manufacturing method. It includes the following steps: preparing nanometer TiO2/1, 4-butanediol system that replacing the nanometer TiO2 by 1,4-butanediol as dispersion medium and vacuum pumping at 70-80 deg.C; preparing polyether ester elastic body that using dimethyl terephthalate, polytetrahydrofuran ether glycol, 1, 4-butanediol as material, adding 0.1-2.0% mass fraction nanometer TiO2, vacuum pumping at 50-100 deg.C, ester interchange reacting at 180-200 deg.C, condensation polymer reacting for 3-4h at 230-250 deg.C under 80Pa; melt spinning. This technology is simple. In addition, the prepared fiber has even nanometer particle disperse, good elastic recovery, low cost, suits for industrialization production.

Oil-displacing agent composition used for improving recovery ratio of high-temperature reservoir and preparation method of composition

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 ...

Molecular weight regulator and application thereof in preparation of sulfur modified chloroprene rubber

The invention provides a molecular weight regulator which comprises the following materials in parts by weight: 1-4 parts of tetrabutyl thiuram disulfide and 1-4 parts of tetraamyl thiuram disulfide. The invention also provides an application of the molecular weight regulator in the preparation of sulfur modified chloroprene rubber. The molecular weight regulator provided by the invention can be added to an oil phase in a proper ratio before emulsion polymerization, so that the molecular weight of a polymer can be effectively regulated and controlled in the emulsion polymerization reaction process, thereby avoiding the chain-breaking process in the existing production method, shortening the time required in the process, lowering the equipment investment and saving the production cost. Besides, chloroprene rubber of an appropriate Mooney viscosity can be prepared, and the Mooney viscosity stability of the product is increased.

High-molecular-weight active comb polymer and preparation method thereof

The invention relates to a high-molecular-weight active comb polymer and a preparation method thereof, which mainly solve the problem of poor connection stability of the active groups of the active polymer and the main chain in prior art. By adopting the technical solution including the active comb polymer represented by structural formula (I) (in which x, y, p and q are mol numbers of structural units of acrylamide, sodium acrylate, 2-acrylamidyl-2-methyl sodium proparesulfonic acid and large monomer with surface activity; x:y:p:q is 60-80:10-30:5-20:0.1-5, R in the large monomer with surface activity is C1-C18 alkyl or C1-C18 alkyl aryl, n is 4-50, and the average molecular weight of the active comb polymer is greater than 106.) and preparation method thereof, the invention solves the problem greatly and can be used in high temperature oil reservoir exploitation with high hypersalinity.

Molecular weight regulator and application thereof in preparation of sulfur modified chloroprene rubber

The invention provides a molecular weight regulator which comprises the following materials in parts by weight: 1-4 parts of tetrabutyl thiuram disulfide and 1-4 parts of tetraamyl thiuram disulfide. The invention also provides an application of the molecular weight regulator in the preparation of sulfur modified chloroprene rubber. The molecular weight regulator provided by the invention can be added to an oil phase in a proper ratio before emulsion polymerization, so that the molecular weight of a polymer can be effectively regulated and controlled in the emulsion polymerization reaction process, thereby avoiding the chain-breaking process in the existing production method, shortening the time required in the process, lowering the equipment investment and saving the production cost. Besides, chloroprene rubber of an appropriate Mooney viscosity can be prepared, and the Mooney viscosity stability of the product is increased.

Polyacrylamide reversed-phase microemulsion and preparation method thereof

The invention relates to polyacrylamide reversed-phase microemulsion and a preparation method thereof. The polyacrylamide reversed-phase microemulsion is mainly used for solving the problem that product solid content is low and emulsion is unstable in the prior art. A semicontinuous polymerization method is adopted to add an aqueous phase containing monomers such as acrylamide into an oil phase containing an emulsifier, so that polymerization process control of the microemulsion is relatively stable, the microemulsion stability is good, and the content of solids capable of being separated out is high. By adopting a technical scheme that the polyacrylamide reversed-phase microemulsion comprises the following components in parts by weight: 20-70 parts of an oil-soluble solvent, 5-20 parts of an emulsifier and a co-emulsifier and 20-70 parts of an aqueous phase containing acrylamide polymer, the problem is solved well; the prepared polyacrylamide reversed-phase microemulsion is directly used ...

Method for preparing glycerol micro-crosslinking polyester ether elastic fiber

Dynamic equivalent method for large-scale wind power station with double-feed wind power set

The invention relates to a dynamic equivalent method for a large-scale wind power station with a double-feed wind power set. The dynamic equivalent method comprises the following steps of: a, reading input data of each fan, wherein the input data comprise a model parameter of each fan, the input speed of each fan, the wind power characteristic of each fan, studied disturbance information and wind-speed disturbance or electrical failure; b, grouping the fans according to the characteristic of input wind speed of each fan, so that the fans in the same groups are subjected to equivalence, and calculating the input wind speed of an equivalent machine; and c, outputting a calculation result of the dynamic equivalent of the wind power station, wherein the calculation result comprises the grouping information of the fans, a model parameter of the equivalent machine and an input wind speed curve of the equivalent machine. The dynamic equivalent method has the advantages that: the influence ofthe ...

Method for preparing nano TiO2 polyester ether elastic fiber

Dispersant for preparation of polyacrylamide powder by polyacrylamide gel

The invention relates to a dispersant for preparation of a polyacrylamide powder by a polyacrylamide gel, and is used for mainly solving the problems that a dispersant in the prior art adopts kerosene and is not environmentally friendly and safe. The problem is better solved by adopting the technical scheme that the dispersant for preparation of the polyacrylamide powder by the polyacrylamide gel includes the following components in parts by weight: (1) 10 parts of polyethylene glycol; (2) 4-25 parts of water; and (3) 0-1 part of a surfactant. The dispersant can be used in industrial production of preparation of the polyacrylamide powder by the polyacrylamide gel.

Method for automatically generating annual running mode report of power grid

The invention discloses a method for automatically generating an annual running mode report of a power grid. The method comprises the following steps: database is established for storing and managing data correlative to the annual running mode of the power grid; normalized reports and report form templates are designed and generated; and according to calculation tasks, calculation data is generated automatically to analyze calculation work procedures and organize calculation tasks in an annual mode. The method supports multiuser cooperative work, and dynamically optimizes and distributes calculation resources according to the number of login users, the running condition of computer cluster nodes, calculation tasks and other information. By using a distributed parallel computing technique, on the basis of electric power system safety and stability quantitative analysis theory, the method automatically carries out calculation, analyzes calculation results in an automatic mode and a summarized ...

Polyacrylamide nanometer microballoon system and preparation method thereof

The invention relates to a polyacrylamide nanometer microballoon system and a preparation method thereof, and mainly solves the problems in the prior art that a conventional microballoon emulsion system is not stable, is relatively low in precipitable-solid content and bad in microballoon expansion property. A microemulsion for preparing the microballoon system through polymerization is prepared by continuously adding 8-50 parts by weight of a water phase containing 5-70 parts by weight of acrylamide and 1-50 parts by weight of a non-ionic monomer and/or an ionic monomer into 10-75 parts by weight of an oily solvent containing 1-22 parts by weight of an emulsifier and/or a co-emulsifier, so that the polymerization of the microemulsion is stable and the process is controllable, and the nanometer microballoon system is good in stability, relatively high in precipitable-solid content and narrow in microballoon particle size distribution, and is expandable in salt water in a controllable manner ...

Platform is verified to electric power system closed loop based on real -time digital simulation ware

The utility model discloses a platform is verified to electric power system closed loop based on real -time digital simulation ware, including real -time digital simulation ware RTDS, information control main website and decision -making system, information control main website passes through the ethernet and is connected with real -time digital simulation ware RTDS and decision -making system respectively, realizes real -time digital simulation ware RTDS and decision -making system communication. The utility model discloses an information interaction between real -time digital simulation ware RTDS and the decision -making system, verification control strategy's that not only can be directly perceived, convenient validity, moreover very big degree optimization the research and development and test verification mode of online safety and stability early warning with the aid decision system, just the utility model relates to a rationally, has very strong practicality.

High-temperature-resistant hydrolyzed copolymer for oilfields, and preparation method and application thereof

The invention relates to a high-temperature-resistant hydrolyzed copolymer for oilfields, and a preparation method and an application thereof in oil recovery, and is mainly used for solving the problem of poor hydrolysis stability of polyacrylamide under a high-temperature and high-salinity condition in the previous technologies. According to the high-temperature-resistant hydrolyzed copolymer for oilfields, and the preparation method and the application thereof disclosed by the invention, the problem is solved well by adopting the following technical scheme: the high-temperature-resistant hydrolyzed copolymer for oilfields is shown in a general formula (I) in the specification, wherein R1 and R2 are selected from C1-C16 hydrocarbyls; M is selected from any one of alkali metal ions or ammonium radical ions; x, y, m and n are the structure unit mole numbers of acrylamide, hydrolyzed acrylamide, N,N-dialkyl substituted acrylamide and N-vinyl pyrrolidone, and x: y: m: n is equal to 100: (1 ...

Harsh oil deposit reversed-phase microemulsion profile-control flooding system and preparation method thereof

The invention relates to a harsh oil deposit reversed-phase microemulsion profile-control flooding system and a preparation method thereof. The problems in the prior art that the initial particle size of the product is improper and polymeric microspheres are poor in expansibility under high-temperature high-salt conditions are mainly solved. The harsh oil deposit reversed-phase microemulsion profile-control flooding system disclosed by the invention comprises the following components in parts by weight of microemulsion: 20-70 parts of an oil-soluble solvent, 5-20 parts of an emulsifier and a co-emulsifier, 20-70 parts of a polymer aqueous phase containing acrylamide and other temperature-resistant salt-resistant comonomers. According to the technical scheme, a semi-continuous reaction method is adopted, the aqueous phase containing acrylamide and other temperature-resistant salt-resistant comonomers is added into an oil phase containing the emulsifiers in batches, and a hydrophobic monomer ...

Method for automatically generating annual running mode report of power grid

The invention discloses a method for automatically generating an annual running mode report of a power grid. The method comprises the following steps: database is established for storing and managing data correlative to the annual running mode of the power grid; normalized reports and report form templates are designed and generated; and according to calculation tasks, calculation data is generated automatically to analyze calculation work procedures and organize calculation tasks in an annual mode. The method supports multiuser cooperative work, and dynamically optimizes and distributes calculation resources according to the number of login users, the running condition of computer cluster nodes, calculation tasks and other information. By using a distributed parallel computing technique,on the basis of electric power system safety and stability quantitative analysis theory, the method automatically carries out calculation, analyzes calculation results in an automatic mode and a summarized ...

Quick robust classification method of preconceived faults for power system transient stability assessment

The invention discloses a quick robust classification method of preconceived faults for power system transient stability assessment and belongs to the technical field of power systems and automation thereof. The method is based on an extended equal area criterion and divides examples in a preconceived fault universal set into five classifications, i.e., stable, doubtfully stable, critical, doubtfully instable and instable by deeply mining different allowance information and comparison results thereof contained by transient stability analysis algorithms with different integration steps, reflecting the time-varying degree of research examples and forming identification rules for different classifications of transient stability severity in combination with fault information. The quick robust classification method of preconceived faults for power system transient stability assessment can realize high-efficiency, reliable and reasonable classification of different classifications of transient ...

Dynamic equivalence method for large-scale photovoltaic power station grid connection

The invention discloses a dynamic equivalence method for large-scale photovoltaic power station grid connection, and belongs to the technical field of electric system control. The method comprises the steps of firstly, calculating the equivalent and uniform input illumination intensity of each grid-connected photovoltaic power generation unit under the non-uniform illumination condition, then, grouping the grid-connected photovoltaic power generation units according to the equivalent and uniform input illumination intensity, aggregating the grid-connected photovoltaic power generation units in the same group into one grid-connected power generation equivalence unit, and finally calculating the equivalent input illumination intensity of each equivalence unit. According to the dynamic equivalence method for large-scale photovoltaic power station grid connection, the dynamic equivalence problem of the large-scale photovoltaic power station grid connection is solved, the number of orders of ...

Power balance based low-voltage riding through and coordinative controlling method of permanent magnet synchronous wind power generator

The invention discloses a power balance based low-voltage riding through and coordinative controlling method of a permanent magnet synchronous wind turbine and belongs to the technical field of wind power generation. According to detection of the voltage of a wind power station grid connection point, permanent magnet synchronous wind turbine sets in a wind power station are controlled during riding through process of low voltage to send out reactive power to power grids by the aid of the active and reactive power transmission capacities of full-power converters in the permanent magnet synchronous wind turbine sets. The active reactive power transmission capacity of the full-power converters in the permanent magnet synchronous wind turbine sets is fully utilized, requirements for providing dynamic reactive currents to the electric grids can be met without adding an SVC (switching virtual circuit) during riding through of the low voltage in the wind power station, stability of direct-current ...

Method for preparing blocked allyl polyether

The invention relates to a method for preparing blocked allyl polyether and mainly aims to solve the problem that the water generated by the etherification in the prior art results in the decomposition of the blocking agent. To solve the problem, the invention adopts the technical scheme comprising the following steps of: (1) adding hydroxyl terminated polyether and alkali metal hydroxide with mole ratio of 1: 0.5 to 5 to organic solvent, then making the mixture react for 0.5 to 15 hours at the azeotropic temperature of the organic solvent and the water, and separating the generated water by the azeotropic reaction of the organic solvent and water to prepare the solution of polyether polyol alkali metal salt; (2) reducing the temperature of the solution prepared in the step (1) to 40 to 80 DEG C, adding halide to the reaction system, etherifying the mixture for 0.5 to 15 hours at the reaction temperature of 80 to 150 DEG C, carrying out the reduced pressure distillation, filtering and desalting ...

External routing inspection device for heat supply pipe network

The invention relates to the technical field of heat supply pipe detection equipment, and particularly discloses a heat supply pipe network external inspection device which is used for detecting a heat supply pipeline and comprises an inspection assembly arranged on the outer side of the heat supply pipeline in a sleeving mode, and the inspection assembly comprises a shell, an auxiliary crawling part, a crawling part, a detection part, a spraying part and a magnetization part. The auxiliary crawling parts are arranged at openings in the two ends of the shell, the crawling parts are arranged at the two ends of the shell in a sliding mode, the detection part and the spraying part are arranged on the inner side surface of the shell, the magnetization part is fixedly arranged on the crawling parts, the shell comprises four arc-shaped plates, the arc-shaped plates are sequentially spliced into a ring shape, and four gaps are formed between every two adjacent arc-shaped plates. And through holes ...

Grid security and stability control method considering wind power uncertainties

The invention discloses a grid security and stability control method considering wind power uncertainties, and belongs to the field of power system operation control technology. An online security and stability early warning system, a wind power forecast system and a security and stability control system are organically combined, operation of a power grid is calculated and analyzed online, key fracture surfaces and a power transmission limit are refreshed, the power generation potential of a wind power plant is sorted by combination of wind power forecast information in a certain time window, and on this basis, an optimal choice of a wind power control object is obtained based on the principle of minimum overcut. According to the invention, the loss of power generation potential of the wind power plant can be minimized, effects of wind power uncertainties on a security and stability control strategy are reduced, the refining level of wind power control is raised under the premise of ensuring ...

Polymer mobility control agent suitable for ultrahigh-salinity oil deposit and preparation method thereof

The invention relates to a polymer mobility control agent suitable for an ultrahigh-salinity oil deposit and a preparation method thereof, and the polymer mobility control agent is mainly used for solving the problem that a polymer can not meet the requirement for tertiary oil recovery due to poor temperature resistant property, salt resistant property and shearing resistant property in the prior art. In order to better solve the problem, the technical scheme adopted by the invention is as follows: the control agent for an amphoteric hydrophobic associated polymer comprises the following components in parts by weight of the amphoteric hydrophobic associated polymer: 5-99.9 parts of nonionic water-soluble monomers, 0-50 parts of anionic monomers or/and cationic monomers, 0.1-10 parts of hydrophobic monomers with surface activity, 0.1-5 parts of inorganic substances and 1-20 parts of surface active agents. The preparation method disclosed by the invention can be used for the industrial production ...

Amphoteric hydrophobically-associating polymer and preparation method thereof

The invention relates to an amphoteric hydrophobically-associating polymer and a preparation method thereof, and is mainly used for solving the problem that polymers are poor in heat resistance, salt tolerance and shear resistance, and incapable of meeting the requirements of tertiary oil recovery in the prior art. According to the amphoteric hydrophobically-associating polymer and the preparation method thereof disclosed by the invention, the problem is solved well by adopting the technical scheme that the amphoteric hydrophobically-associating polymer contains, in parts by weight, 5-99.9 parts of non-ionic water-soluble monomer, 0-50 parts of anionic monomer or/and cationic monomer, and 0.1-10 parts of hydrophobic monomer with surface activity. The amphoteric hydrophobically-associating polymer and the preparation method thereof can be used for industrial production and application of polymers for oil field tertiary oil recovery.

Transient stability emergency control strategy calculating method with generator tripping and direct-current emergency power modulation coordinated

The invention discloses a transient stability emergency control strategy calculating method with generator tripping and direct-current emergency power modulation coordinated and belongs to the technical field of electric systems and automation of the electric systems. The method can gain self participation factors of a generator tripping emergency control measure and self participation factors of a direct-current emergency power modulation emergency control measure and can calculate out commutation factors of the two emergency control measures based on the expanded equal area criterion, so that coordination control indexes of the two emergency control measures can be determined. Furthermore, an iterative method is utilized to determine the final coordination emergency control measures based on the initial effective predictive control quantity. The method can be applied to calculation of an off-line security control strategy and calculation of an online pre-decision emergency control measure ...

Temperature-resistant salt-resistant copolymer for oilfield, and preparation method and application thereof

The invention relates to a temperature-resistant salt-resistant copolymer for an oilfield, and a preparation method and application thereof, which mainly solve the problem that polyacrylamide is prone to hydrolysis and poor in temperature resistance and salt tolerance under the conditions of high temperature and high salinity. The invention adopts the following technical scheme: the temperature-resistant salt-resistant copolymer for an oilfield as shown in general formula (I) is used, wherein R1 and R2 are selected from hydrogen or C1-C16 alkyl, and R1 and R2 can not be hydrogen at the same time; M1 and M2 are independently selected from any one of hydrogen, alkali metal or ammonium; and x, y, m and n are respectively mole numbers of structural units of acrylamide, hydrolyzed acrylamide, 2-acrylamido-2-methylpropyl sulfonate and N-alkyl-substituted acrylamide, and x:y:m:n=100:(1-85):(1-140):(1-70). Thus, the technical scheme well solves the problem. The invention can be used in the oilfield ...

Polymer mobility control agent suitable for high-temperature and high-salinity harsh reservoir and preparation method of polymer mobility control agent

The invention relates to a polymer mobility control agent suitable for a high-temperature and high-salinity harsh reservoir and a preparation method of the polymer mobility control agent, and the polymer mobility control agent is mainly used for solving the problems that the polymer in the prior art is poor in heat and salt resistance and long-term stability, and cannot meet the requirements of tertiary oil recovery. In order to better solve the problems, the technical scheme adopted by the invention is as follows: an amphoteric hydrophobic association polymer is prepared from the following raw materials in parts by weight: 5-99.9 parts of a non-ionic water-soluble monomer, 0-50 parts of an anionic monomer or/and cationic monomer, 0.1-10 parts of a hydrophobic monomer with surface activity, 0-20 parts of a viscosity stabilizer and 0-20 parts of a surfactant. The preparation method can be applied to industrial production and application of the polymer mobility control agent for the high-temperature ...

Bionic fishtail based on physical oblique crank and rocker mechanism

The utility model relates to the technical field of bionics. The utility model aims to provide a bionic fishtail based on a physical inclined crank rocker mechanism. The bionic fishtail has the characteristics of simple structure and flexible movement. The technical scheme is as follows: the method comprises the following steps: preparing; the utility model discloses a bionic fishtail based on a physical oblique crank and rocker mechanism. The method is characterized in that the method is characterized by comprising the following steps; the bionic fishtail comprises a main rack, an auxiliary rack rotatably positioned on the main rack, a fishtail rotatably positioned on the auxiliary rack, a steering engine arranged on the main rack, a motor arranged on the auxiliary rack, a first transmission mechanism for transmitting power of the steering engine to drive the auxiliary rack to swing and a second transmission mechanism for transmitting power of the motor to drive the fishtail to swing.The ...

High-molecular-weight active comb polymer and preparation method thereof

The invention relates to a high-molecular-weight active comb polymer and a preparation method thereof, which mainly solve the problem of poor connection stability of the active groups of the active polymer and the main chain in prior art. By adopting the technical solution including the active comb polymer represented by structural formula (I) (in which x, y, p and q are mol numbers of structural units of acrylamide, sodium acrylate, 2-acrylamidyl-2-methyl sodium proparesulfonic acid and large monomer with surface activity; x:y:p:q is 60-80:10-30:5-20:0.1-5, R in the large monomer with surface activity is C1-C18 alkyl or C1-C18 alkyl aryl, n is 4-50, and the average molecular weight of the active comb polymer is greater than 106.) and preparation method thereof, the invention solves the problem greatly and can be used in high temperature oil reservoir exploitation with high hypersalinity.

Fine cutting system terminal access layer communication method and fine cutting system

The invention discloses a communication method of a terminal access layer of a precision cutting system and the precision cutting system, the terminal access layer comprises an access device and a plurality of control terminals, and the access device is connected with the plurality of control terminals in an optical fiber ring network mode; the control terminal receives and forwards communication messages sent by the access device and other control terminals through a pair of interfaces accessed to the same ring network; and the access device receives the communication message sent by the control terminal through a pair of interfaces accessed to the same ring network, and does not forward the communication message sent by the control terminal. Any control terminal has two paths to communicate with the access device, the reliability of communication between the control terminal and the access device is improved, the interruptible load collected by the control terminal can still serve as ...

Novel mildew resistant tablet and preparation method thereof

Layered storage box for logistics e-commerce

The invention discloses a logistics e-commerce layered storage box, and relates to the technical field of logistics storage boxes, the logistics e-commerce layered storage box comprises a buffer device, a placement device and a heat dissipation device, the buffer device comprises a buffer assembly composed of a base, a buffer pad, a shock absorber and a limiting plate, and the placement device is arranged on the limiting plate; comprising a box body, a placement bin, a sliding groove, a clamping groove, a storage box, a moving rod and a handle, and the heat dissipation device comprises a fan. According to the logistics e-commerce layered storage box, large objects are directly placed on the placing frame on the box body, the buffering assembly is arranged at the lower end of the box body, the shaking amplitude generated when the objects are placed is reduced, internal and external ventilation is guaranteed through operation of the fan, the situation that the interior of the box body is ...

Method for processing non-convergence tide data on basis of regulation on reactive power

The invention discloses a method for processing non-convergence tide data on the basis of regulation on a reactive power and belongs to the technical field of control of a power system. According to the invention, an influence index of tide convergence is raised on the basis of a tangent vector and according to the index, a key node influencing the tide convergence is found; by adding reactive power compensation to the key node, a reactive power compensation quantity of the key node is shared in each piece of reactive compensation equipment according to sensitivity information. The method solves the problem of regulating non-convergence tide data into reasonable convergence tide data. The method is helpful for researchers to understand the non-convergence reasons of tide data and provides a powerful means for daily tide data regulation and maintenance work of engineers.

Grid security and stability control method involved in wind power plant benefit fairness

The invention discloses a grid security and stability control method involved in wind power plant benefit fairness, and belongs to the technical field of power system operation control. An online security and stability prewarning system is organically combined with a security and stability control system, a grid operation work condition is calculated and analyzed on line, a key transmission section, the transmission limit of the key transmission section, a controllable wind power plant set and sensitivity of the controllable wind power plant set to the key transmission section are refreshed, then a generator tripping control range is determined in real time according to a sensitivity sequence, and generator tripping controlling quantity is averagely distributed according to contribution to security and stability problems in the selected control range. According to the method, requirements of a wind power base for safe and stable operation are met, meanwhile, requirements of the wind power ...