480results about How to "Low flow resistance" patented technology

The invention relates to the technical field of oil and gas well exploitation, in particular to a jet flow drainage device in a deep well gas production pipe column and a using method. According to the technical scheme, a pressure-controlled switch jet suction pump and a reverse circulation drainage pump are connected and lowered into an oil pipe through a small-diameter oil pipe, the pressure-controlled switch jet suction pump is located on the upper middle portion of an oil-gas well, the reverse circulation drainage pump is located on the lower portion of the oil-gas well, a packer is installed below the reverse circulation drainage pump, and a check valve is installed at the bottom of the reverse circulation drainage pump; high-pressure gas is injected into the small-diameter oil pipe, water in a pipe column on the upper portion of the pressure-controlled switch jet flow suction pump is discharged, and after emptying, the sliding sleeve moves to close the mixed liquid outlet; then high-pressure gas is injected into an annular space between a casing pipe and an oil pipe, water in a pipe column on the upper portion of a reverse circulation drainage pump is drained, liquid in the pipe column is lifted through multi-stage relay jet flow, well bottom accumulated water and water stored in the pipe column are drained to the ground, the well bottom back pressure is effectively reduced, water blocking and water locking are relieved, and the gas well productivity is recovered.

The invention discloses an amphiphilic carbon dot, a clean fracturing fluid and application of the clean fracturing fluid. The amphiphilic carbon dot is prepared by performing solvothermal reaction on organic acid and a hydrophobic aliphatic compound. According to the amphiphilic carbon dots provided by the invention, simple preparation of the amphiphilic carbon dots with different structures and properties can be realized by changing the types of the hydrophobic aliphatic compounds, and the clean fracturing fluid prepared by utilizing the amphiphilic carbon dots not only has high temperature resistance and is suitable for reservoirs with relatively high temperature, but also has high salt resistance, so that the clean fracturing fluid can be used for preparing the clean fracturing fluid. And the fracturing fluid has a good fracturing effect in hydrofracture operation of low-permeability and high-salinity oil reservoirs.

The utility model relates to the technical field of shell-and-tube heat exchangers, and particularly discloses a multi-pipe-diameter multi-helix-angle multi-strand winding pipe type heat exchanger. Comprising a shell, a middle core cylinder installed in the shell and a spiral assembly spirally wound on the outer side of the middle core cylinder in the axial direction of the middle core cylinder. The spiral assembly comprises a plurality of spiral winding tube bundle layers which are spirally wound on the outer side of the middle core cylinder in sequence; each spiral winding tube bundle layer comprises a plurality of groups of spiral winding tubes wound on the outer side of the middle core cylinder, and the outer diameters of the spiral winding tubes in each spiral winding tube bundle layer are arranged at equal intervals; one or more fluid media are arranged in the spiral winding pipes on the same layer, and one or more wall thicknesses of the spiral winding pipes are arranged and correspond to the fluid media in a one-to-one mode. The heat exchange requirement and the winding strength requirement can be effectively met, meanwhile, the use efficiency of the material can be improved, and the production and processing cost can be reduced.

The invention discloses a vein-shaped composite bionic micro-channel radiator with petal-shaped fins, relates to the technical field of radiators, and solves the problems that the temperature uniformity of a radiating area of a micro-channel radiator is poor, and extra pumping work consumption is caused. A first-stage vein flow channel is arranged in the center of a micro-channel heat sink, and a hot plate is arranged at the bottom of the micro-channel heat sink; the micro-channel heat sink comprises two first heat sinks and two second heat sinks, and the second heat sinks and the first heat sinks are in mirror symmetry. A plurality of second-level vein runners, a plurality of third-level vein runners and a plurality of fin arrays are arranged in the first heat sink, and the second-level vein runners are obliquely arranged and communicate with the first-level vein runners; the plurality of third-stage vein runners are arranged among the second-stage vein runners at equal intervals; the fin array is arranged at the tail end in the second-stage vein flow channel; the fin array comprises two fins, and the fins are arc-shaped plates. The invention has the characteristics of high heat dissipation efficiency, good temperature uniformity, low flow resistance and small pressure drop, thereby ensuring efficient and stable operation of high-power micro devices.

The invention relates to a gas nano purifier. The gas nano purifier comprises a mounting seat, the gas storage bin is installed on the installation base and used for storing clean gas, the side wall of the upper portion of the gas storage bin extends upwards to form an installation plate, and a gas path through hole is formed in the middle of the installation plate; the gas-water separator is mounted on the mounting plate and is used for carrying out primary purification on to-be-cleaned gas; the adsorption tower is mounted on the mounting plate and is used for carrying out secondary purification on the to-be-cleaned gas; gas to be cleaned sequentially flows through the gas-water separator and the adsorption tower and then enters the gas storage bin; the adsorption tower is communicated with the gas storage bin through an exhaust pipe; and the exhaust pipe penetrates through the gas path through hole. Through the arrangement, the installation operation is greatly simplified, and the integrity and the space utilization rate of equipment are improved.

The utility model relates to a cold heading device for a special-shaped sleeve. The cold heading device comprises a cutting mechanism, an ejection mechanism, a conveying mechanism and six dies. The conveying mechanism moves between the ejection mechanism and the six molds for feeding; the first upsetting die is used for chamfering the lower end of an initial blank; the second upsetting die is used for chamfering the upper end of a turned first blank and punching concave holes in two ends; the third upsetting die is used for stretching and forming a second blank turned again and deepening the depth of an inner hole in the upper end to be 1 / 3 of the height of the second blank; the four-upsetting die is used for stretching and forming a third blank again and deepening a lower end inner hole to be 2 / 3 of the height of the third blank, the through hole die is used for enabling an upper end inner hole and a lower end inner hole of a fourth blank to be communicated to form a through hole, and the final upsetting die is used for enabling the middle of a fifth blank to form a convex arc. By the adoption of the technical scheme, the mold manufacturing structure is simple in technological process and convenient to maintain; the die is long in service life and low in cost.

The invention relates to a porous carbon felt structure which comprises a carbon felt plate, a plurality of porous channels are formed in the carbon felt plate, and the axes of the porous channels are perpendicular to the flow direction of electrolyte on the carbon felt plate and parallel to the thickness direction of the carbon felt plate; a long-strip-shaped flow channel parallel to the flow direction of electrolyte is arranged on a traditional carbon felt plate, the proportion of a low-flow-speed area is 78.01%, according to the pore channel carbon felt structure, the pore channels perpendicular to the flow direction of the electrolyte are arranged on the carbon felt plate to serve as the flow channels, the proportion of the low-flow-speed area is reduced to 6.12%, the pressure loss of the electrolyte flowing on the carbon felt plate is effectively reduced, and the service life of the carbon felt plate is prolonged. The flow velocity of the electrolyte on the carbon felt plate is improved, and the uniformity of flow velocity distribution is also remarkably improved.

The invention discloses circulating pulping equipment. The circulating pulping equipment comprises a circulating tank and a dispersing mechanism, the circulating tank is provided with a circulating cavity. The dispersing mechanism is arranged at the bottom of the circulating tank and located in the circulating cavity. The dispersing mechanism comprises a rotor, a stator and a flow guide part. The rotor comprises a rotor base, an impeller and at least one rotor ring, the radial size of the impeller at the material suction end is smaller than or equal to the radial size of the impeller at the material discharge end, and the impeller comprises a base body and impeller blades. A rotor ring is disposed around the impeller, the rotor ring being provided with a plurality of first shear slots. The stator comprises a stator base and at least one stator ring, the stator base is fixed on the circulating tank and is provided with a through hole, the guide piece is fixedly connected with the stator base, the guide piece and the stator ring are located on different sides of the stator base, the stator ring and the rotor ring are alternately arranged, and a plurality of second shearing grooves are formed, so that the requirement of large-flow circulating pulping is met; and the dispersing capacity and the circulating capacity are improved.

The invention discloses a transcritical flow self-adaptive multi-stage nested structure drag reduction channel, and relates to the technical field of heat conduction and heat management. In order to overcome the technical defects that in the prior art, in an existing drag reduction and heat exchange strengthening technology, drastic changes of fluid physical properties caused by transcritical phase change in an LNG gasifier are difficult to deal with, and the efficient drag reduction effect is difficult to maintain, the technical scheme is that the drag reduction and heat exchange strengthening device comprises a flowing channel, a multi-stage nested groove structure is arranged on the inner wall of the flowing channel, the groove structure comprises a plurality of gradually-changed grooves formed in the flowing direction, and the width and the depth of the grooves are gradually changed in the flowing direction; the first-stage groove is a macroscopic groove which is processed along the inner wall of the flowing channel; the second-stage groove is formed in the first-stage groove and is a micro-scale groove; and the third-level micro-nano rough structure is arranged on the inner surface of the second-level groove and comprises micro-nano-level bulges and pits. The device is suitable for the work of drag reduction and heat exchange enhancement.

The invention belongs to the technical field of heat exchange of electronic equipment, and discloses a manifold micro-channel type radiator and a heat dissipation method.The manifold micro-channel type radiator comprises a plurality of radiator modules arranged in a linear array, and each radiator module comprises two symmetrically-arranged heat dissipation units; the heat dissipation unit comprises a manifold distributor and a micro-channel; a cold side manifold channel and a hot side manifold channel are processed on the manifold distributor; the cold side manifold channel is of a channel structure which is reduced in the flowing-in direction of a coolant, and the hot side manifold channel is a uniform-section channel; the width of the hot side manifold channel is greater than the width of the inlet end of the cold side manifold channel; the micro-channel comprises a micro-channel substrate and a micro-channel main body arranged on the micro-channel substrate; the micro-channel main body comprises a cold side micro-channel area and a hot side micro-channel area; the hot side micro-channel area comprises a plurality of hot side micro-channels which are arranged in parallel, and each hot side micro-channel is provided with a plurality of pin fins which are linearly distributed; the purpose of effectively utilizing the cooling potential of the hot side manifold channel is achieved.

According to the intelligent dust suppressant adding and spraying device and the using method thereof, two same water tanks are arranged on a supporting plate side by side, a water tank cover plate is installed at the tops of the water tanks, a stirring motor, a water inlet valve, a water inlet stepping motor, a belt system and a dust suppressant storage box are installed on the water tank cover plate, and a fog gun machine capable of rotating all around is further installed on the supporting plate and used for spraying; a water suction pump, a water outlet valve and a water outlet stepping motor are installed at the bottom of the supporting plate, and the water suction pump transports the dust suppressant solution in the water tank to the fog gun machine through a water hose to complete spraying. A liquid level monitor, a controller and a dust concentration monitor are installed on the side edge of the water tank, the liquid level monitor and the dust concentration monitor transmit signals to the controller, the controller responds to control the working states of the stepping motor, the belt and the water suction pump, and the intelligent control process is achieved. The device can be automatically operated, the functions of quantitative feeding and intelligent spraying rate adjustment are achieved, material waste is avoided, and remarkable environmental protection benefits and economic benefits are achieved.

The invention provides a catalytic element, a hydrogen recombiner and a working method of the hydrogen recombiner, and belongs to the technical field of hydrogen safety of nuclear energy industry departments. The catalytic element is in a water drop shape, a three-dimensional streamline solid structure of the catalytic element can be obtained by rotating a two-dimensional streamline by 360 degrees with the central axis as the axis, and the area of the bottom of the catalytic element is larger than that of the top of the catalytic element. The structural design of the catalytic element can effectively improve the hydrogen elimination performance and reduce the flow resistance, so that the comprehensive performance of the hydrogen recombiner is improved.

The invention discloses a variable-pipe-diameter U-shaped tubular evaporator suitable for a high-temperature molten salt energy storage system. The variable-pipe-diameter U-shaped tubular evaporator comprises a tube box, a pass partition plate, a shell, a variable-pipe-diameter U-shaped heat exchange tube bundle, a tube plate, a baffle plate, a tube pass undersaturated water inlet, a tube pass saturated steam outlet, a shell pass high-temperature molten salt inlet and a shell pass low-temperature molten salt outlet. The problems that a traditional constant-pipe-diameter U-shaped pipe evaporator is large in flow resistance, concentrated in thermal stress, low in heat exchange efficiency and the like in a large system are solved. According to the evaporator, the design of the U-shaped heat exchange tube bundle gradually changing along the way is adopted, the flow speed and pressure distribution of fluid in the tube are optimized through a variable-tube-diameter structure, the risks of local overheating and uneven evaporation are reduced, and the flow resistance is effectively reduced. And due to the variable pipe diameter design, the thermal stress concentration phenomenon is reduced, so that the reliability and the service life of the equipment are improved. Through the design, the heat transfer uniformity and the heat transfer efficiency of the evaporator are remarkably improved, and efficient and stable evaporation heat exchange equipment is provided for a large fused salt heat storage system.

The invention relates to the technical field of compressors, and discloses an air cylinder assembly and a compressor. The air cylinder assembly comprises a first air cylinder, a second air cylinder and a flow dividing channel. The first cylinder includes an intake passage having an intake port and an exhaust port. The second air cylinder and the first air cylinder are coaxially arranged. The shunting channel is arranged on the first cylinder and the second cylinder. One end of the shunting channel is a shunting inlet and is communicated with the air inlet channel, and the other end of the shunting channel is a shunting outlet and is positioned on the inner wall of the second cylinder. The axial size of the first air cylinder is larger than that of the second air cylinder. Air enters the air inlet channel through the air suction port and then is shunted, enters the first air cylinder through the air outlet and enters the second air cylinder through the shunting channel. According to the compressor, the axial size of the first air cylinder is larger than that of the second air cylinder, the diameter of the air suction port can be increased, the air inlet sectional area can be increased, the air suction amount during high-frequency operation of the compressor is improved, and the air suction efficiency is improved.

The invention discloses a natural gas transportation pipeline drag reduction structure, an optimization method and a system, and relates to the field of pipeline structures. The problems that groove drag reduction in the field of natural gas pipeline transportation aims at small-diameter pipelines, most grooves are in a traditional v shape, and the drag reduction effect is not remarkable enough are solved. The resistance reduction structure comprises a plurality of semicircular groove structures with alternate widths and widths; wherein the width of the wide groove is twice that of the narrow groove. The optimization method comprises the following steps: establishing a smooth pipeline and a model with a wide-narrow alternate semicircular groove on the wall surface; carrying out structured grid division on the smooth pipeline and the wall surface with the wide and narrow alternate semicircular grooves; numerical simulation is conducted through Fluent fluid simulation software, and a turbulent flow structure in the pipeline is obtained; and the drag reduction rate is calculated, and the final natural gas transportation pipeline drag reduction structure is determined according to the drag reduction rate. By reducing the resistance, the amount of conveyed gas can be increased under the same energy consumption, or the energy consumption is reduced under the condition of keeping the same flow, so that the overall conveying efficiency is improved.

The invention belongs to the technical field of injection molding, and particularly relates to a toothbrush handle injection molding device and method.The toothbrush handle injection molding device comprises a fixed mold frame, a movable mold frame and a movable assembly, the fixed mold frame is fixed to an injection molding frame mold, and at least one movable auxiliary mold is arranged on the fixed mold frame and installed in the fixed mold frame in a telescopic mode; a mold cavity used for injection molding and filling is formed in the top of the movable auxiliary mold, the movable mold frame is located on the opposite side of the fixed mold frame, moves close to or away from the fixed mold frame, is arranged on one side of the fixed mold frame and moves forwards or backwards in the direction of the movable mold frame, and a movable mold core is fixed to the movable assembly in a penetrating mode; and a flowing path through which injection molding sol passes is arranged in the movable mold core. According to the invention, the to-be-injected sol is not influenced by the structure temperature during flowing, the component temperature of the internal structure is maintained, and during high-speed filling, the flow velocity length is increased and the flowing is stable, so that the material is more uniformly distributed in the whole mold cavity, and further, the injection molding quality can be improved, and the product size can be stabilized.

The oil-cooled rotor core comprises a rotating shaft and a plurality of laminations, the motor further comprises an oil duct, the plurality of laminations are laminated along the height direction to form the rotor core, the rotor core takes the rotating shaft as an axis and is sleeved with the rotating shaft, the laminations comprise a second lamination and at least two groups of first laminations, the first laminations are located at two ends of the rotating shaft, and the second lamination is located at two ends of the rotating shaft. The second laminations are located in the middle of the rotating shaft, the inner diameter of the second laminations is larger than that of the first laminations, the second laminations are in clearance fit with the rotating shaft, and oil channels are formed between the multiple second laminations and the rotating shaft. In the process of laminating the laminations into the rotor core, the first lamination in interference fit with the rotating shaft is laminated at the two ends of the rotor core, the inner diameter of the second lamination is directly enlarged to serve as an oil duct, and the second lamination is laminated at the middle section of the rotor core and is not in contact with the rotating shaft. The structural design can reduce the weight of the rotor iron core, reduce the oil flow resistance, increase the contact area of oil and the rotor iron core, and improve the cooling efficiency of the rotor iron core.

The invention discloses a high-thermal-conductivity and high-uniform-temperature microchannel structure and a processing method thereof.A microchannel heat sink and an acrylic cover plate above the microchannel heat sink are arranged, a contraction flow channel is embedded in the acrylic cover plate, the height of the contraction flow channel is gradually decreased from the inlet end to the outlet end, and the main body material of the microchannel heat sink is a diamond / copper composite material; due to high thermal conductivity, the diamond / copper-based micro-channel can greatly reduce the temperature of the chip in the working process, and the contraction type micro-channel can improve the flow velocity of the outlet side, enhance the heat exchange effect, reduce the temperature difference between the inlet and the outlet and enhance the temperature uniformity. The magnetron sputtering polytetrafluoroethylene can make the acrylic flow channel hydrophobic and reduce the flow resistance, so that the design of the micro-channel integrates high heat dissipation, high temperature uniformity and low flow resistance, and the overall heat exchange performance of the existing micro-channel is improved.

The invention relates to the technical field of deepwater grouting, and particularly discloses an orifice pipe imbedding method and an orifice pipe buoy device under the deepwater condition. The orifice pipe buoy device comprises two symmetrically arranged buoyancy mechanisms and further comprises a connecting piece; the connecting piece comprises a rotating piece, an annular seat, an arc-shaped fixing piece and an elastic clamping piece; the two arc-shaped fixing pieces are detachably connected and fixed to the steel pipe. The elastic clamping piece is arranged on the inner side of the arc-shaped fixing piece; a second inclined surface is formed on the upper outer wall of the elastic clamping piece; the annular seat is detachably connected with the arc-shaped fixing piece; the rotating piece is in threaded connection with the annular seat; a first inclined surface is arranged on the inner side of the lower part of the rotating part; when the rotating piece moves downwards, the elastic clamping piece is hooped at the joint of the two steel pipes; the buoyancy mechanisms are detachably fixed to the connecting pieces, and the two buoyancy mechanisms define an annular cylinder. The problems that an existing buoyancy device has large resistance under water flow, and the perpendicularity of an orifice pipe cannot be ensured can be solved.

The invention provides a proppant and a preparation method and application thereof.The proppant is of a double-layer core-shell structure and comprises a proppant inner core, an amphiphobic modified layer combined to the surface of the proppant inner core through chemical bonds and a degradable polymer layer covering the surface of the amphiphobic modified layer; wherein a polymeric monomer of the degradable polymer layer comprises a catechol compound and a salt-tolerant acrylate monomer. The proppant provided by the invention is hydrophilic and easy to disperse on the ground, is beneficial to fracturing construction, is amphiphobic on the underground surface, and can improve the long-term flow conductivity of supporting cracks.

The invention discloses a micropore and microchannel composite self-circulation dual-channel cold plate, and belongs to the technical field of heat dissipation of electronic equipment. The device comprises a shell, an inlet multi-stage channel, an outlet multi-stage channel, a liquid separation cavity, a liquid collection cavity, a micro-channel area, a porous area and a steam cavity. Fluid is uniformly distributed in the inlet multi-stage channel and enters the micro-channel area through the liquid separation cavity, the fluid in the micro-channel area is heated and evaporated and enters the outlet multi-stage channel under the action of capillary force, part of the fluid enters the porous area under the driving of the capillary force, and the fluid in the porous area is heated and evaporated to form a vapor-liquid meniscus. The surface tension of the vapor-liquid meniscus drives the fluid into the vapor chamber. In the process, the porous area provides a large capillary force for fluid flowing, the micro-channel area provides a large flow rate, the fluid driving force is improved, meanwhile, the flow resistance can be reduced, and cooling of high-power-consumption devices can be achieved without external input power.

The invention discloses falling film evaporation equipment, and relates to the technical field of falling film evaporation, and the falling film evaporation equipment comprises a rotating mechanism. According to the falling film evaporation equipment, through the design of the rotating mechanism, after liquid enters from the feeding port, the liquid washes the blades, the stress area of the blades to the liquid is increased, so that the effect of enlarging the rotating effect is achieved, the blades drive the rotating shaft to rotate, and the square plate is driven to rotate in the rotating process of the rotating shaft; the liquid flowing range is increased by stirring the liquid, so that the liquid flowing uniformity is improved, then the square notches are formed, the resistance borne by the square plates during rotation in the fluid is reduced through the open grooves, the energy consumption is reduced, and the uniform mixing of the materials is promoted; the stirring efficiency and quality are improved, the space with liquid is increased, and liquid attachment residues are reduced.

The invention discloses a remote continuous adjustable low-wind-resistance air distribution tee joint suitable for a complex ventilation system, and belongs to the technical field of pipeline valves, the remote continuous adjustable low-wind-resistance air distribution tee joint comprises a tee joint body, a branch pipe air adjusting device, an angle control device and a flow guide device, the tee joint body comprises two branch pipe air inlet connecting sections, a tee joint air outlet section and a tee joint base, the top end of the branch pipe air inlet connecting section is connected with an air inlet pipe through a flange, the top end of the three-way air outlet section is connected with the three-way base through a flange, and the bottom end of the three-way air outlet section is connected with an air outlet pipe through a flange. Therefore, by the adoption of the remote continuous adjustable low-wind-resistance air volume distribution tee joint suitable for the complex ventilation system, stepless variable air volume adjustment of all branch pipes of the complex ventilation system is achieved, local resistance of the tee joint is reduced, and the remote continuous adjustable low-wind-resistance air volume distribution tee joint has the advantages of being capable of achieving stepless air volume adjustment, convenient to adjust, stable in working state and the like.

The invention discloses a furnace rear flue gas water-cooling comprehensive temperature control system and a matched cooling water amount control method, and particularly relates to the technical field of flue gas purification and environmental protection, the furnace rear flue gas water-cooling comprehensive temperature control system comprises a semi-dry desulfurization tower, a cyclone dust collector, a bag-type dust collector and a low-temperature SCR denitration device of which the output ends are sequentially communicated in series; the outlet flue of the cyclone dust collector and the inlet flue of the bag-type dust collector are respectively and fixedly communicated with a communicating flue which is connected with an electric air door in series, and the surface type water-cooling flue gas cooling system comprises a water-cooling flue gas cooler which is at least communicated with a cooling water supply pipeline. A comprehensive temperature control system combining a surface type water cooling flue gas cooling system and a flue gas emergency water spraying cooling system is adopted, a matched cooling water amount control algorithm is formulated from the enthalpy value heat balance principle, the surface type cooling water flow and the spraying water amount are accurately controlled, it is effectively ensured that the boiler rear flue gas temperature meets the flue gas purification process requirement, and the boiler rear flue gas purification efficiency is improved. Meanwhile, heat released in the flue gas cooling process is recycled, and the circulating efficiency of the power plant is further improved.

The invention relates to the technical field of oil field yield increase and transformation, in particular to environment-friendly biological blockage removal liquid and application thereof, and aims to solve the problem that a current biological blockage removal product can only remove organic blockage. The environment-friendly biological unblocking liquid provided by the invention is prepared from the following components in percentage by mass: 2-5% of biological enzyme, 1-5% of surfactant, 1-5% of pH (Potential of Hydrogen) regulator and the balance of water. 1%-3% of a biological enzyme stabilizer; 3-5% of a chelating agent; 0.5%-1% of a surfactant; 0.5%-1% of a dispersion suspending agent; and the balance of water. The biological blockage removal liquid provided by the invention can effectively remove organic blockage of a stratum caused by wax and asphaltene precipitates, so that crude oil is released from the surfaces of rock particles, the flowing of the crude oil in pores of the stratum is improved by changing the wetting state of rock, and inorganic blockage is removed through permeation dispersion and chelation solubilization effects, so that the mechanical property of the stratum is improved. Mixed scales formed by mutual deposition of inorganic scales and organic matters (wax and asphaltene) are effectively removed, and the requirement for plugging removal of a complex scaling reservoir of an oil well is met.

The invention discloses a water injection well depressurization and augmented injection agent and a preparation method thereof, and relates to the technical field of augmented injection agent materials. The pressure-reducing and injection-increasing agent for the water injection well comprises the following raw materials in parts by weight: 50-60 parts of a betaine type ampholytic surfactant, 10-15 parts of a nonionic surfactant, 20-30 parts of a quaternary ammonium salt surfactant, 3-5 parts of a scale inhibitor, 2-3 parts of a stabilizer and 150 parts of deionized water. The preparation method comprises the following steps: preparing a first-generation polymer from urotropine and tromethamine, then reacting the first-generation polymer with epoxy chloropropane to prepare a graft polymer, and finally reacting the graft polymer with hexadecyl dimethyl tertiary amine to prepare the quaternary ammonium salt surfactant. The water injection well depressurization and augmented injection agent prepared by the invention has the characteristics of large unblocking radius, good depressurization and augmented injection effects and the like.