83results about How to "Low operating cost" patented technology

The invention provides a seabed node, the seabed node comprises a buoyancy device, a base device and a controller, the buoyancy device is installed at the top of the seabed node, and the buoyancy device comprises a water storage cavity; one end of the communicating vessel is communicated with the water storage cavity; the electromagnetic valve is communicated with the other end of the communicating vessel; the compression water pump is communicated with the electromagnetic valve; the base device is mounted at the bottom of the seabed node, comprises a waterproof electromagnetic device and is connected with the seabed node; the counterweight is electromagnetically coupled with the waterproof electromagnetic device; the controller is used for controlling the electromagnetic valve to be opened and controlling the compression water pump to inject water into the water storage cavity through the communicating vessel, so that the seabed node sinks; the controller further controls the electromagnetic valve to be opened, controls the compression water pump to enable the water storage cavity to drain water through the communicating vessel, and controls the waterproof electromagnetic device to enable the configuration and the waterproof electromagnetic device to be decoupled, so that the seabed node floats upwards.

The invention relates to the field of tire manufacturing equipment, in particular to a continuous fiber composite material tire bead forming device and a preparation process. Comprising a machine base, a feeding mechanism, a winding forming mechanism and a conveying mechanism. The feeding mechanism and the winding forming mechanism are both arranged on the upper half portion of the machine base, and the winding forming mechanism is arranged behind the feeding mechanism. The conveying mechanism is arranged on the left side of the lower half portion of the machine base. The invention has the advantages of flexible process adjustment and multifunctional performance, and various complex structures can be designed and processed according to the tire bead. Various fiber stacking modes and resin infiltration modes can meet different product structures and performance requirements of processing requirements through automatic control and intelligent operation of equipment.

The utility model provides a treatment device of a system for reducing vent gas to enter a torch during starting of a coal hydrogen production and synthesis ammonia device, which comprises a gasification washing tower which is respectively connected with a gasification torch-removal vent pipeline valve, a gasification crude synthesis gas delivery valve and a crude synthesis gas inlet heating furnace valve through pipelines, the gasification torch-removing emptying pipeline valve is connected with a conversion device heating pipeline emptying valve through a pipeline, and the conversion device heating pipeline emptying valve is respectively connected with a first water separator, a purification tank A inlet valve and a purification tank B inlet valve through pipelines; the bottoms of the purification tank A inlet valve and the purification tank B inlet valve are connected with purification tanks through pipelines. According to the treatment device for reducing the discharged air to enter the torch system during the start-up of the coal hydrogen production and ammonia synthesis device, the problem of low temperature of crude synthesis gas produced by a gasification device during the start-up stage is effectively solved in the existing coal hydrogen production and ammonia synthesis project production process, and waste caused by the fact that the crude synthesis gas is fed into the torch system due to low temperature is avoided.

The invention relates to a low-pressure cross-flow triple-effect dividing wall column rectification process and device for refining crude methanol, the process comprises a normal-pressure dividing wall column, a vacuum column and a pressurizing column, the tower top pressure of the normal-pressure dividing wall column is 130-150KPa (A), and the tower top temperature is 70-80 DEG C; the tower kettle temperature of the normal-pressure dividing wall tower is 7-8 DEG C higher than the tower top temperature; an inlet of the pressurizing tower is connected with an outlet of a tower kettle of the vacuum tower, and live steam of 0.6 MPa is used as a heat source; the pressure of the top of the pressurizing tower is 320-340KPa (A), the temperature of the top of the pressurizing tower is 96-100 DEG C, and the temperature of the bottom of the pressurizing tower is 136-140 DEG C; the pressure at the top of the vacuum tower is 50-60KPa (A), the temperature at the top of the vacuum tower is 48-52 DEG C, and the temperature difference between the top and the kettle of the vacuum tower is 7-8 DEG C; and the atmospheric tower reboiler, the vacuum tower top reflux and the second vacuum tower reboiler are all used for partially extracting refined methanol. The triple-effect rectification requirement is met on the premise that low-pressure steam is used, efficient triple-effect rectification of crude methanol in actual engineering is achieved, and energy consumption is reduced.

The invention provides a pumping unit and a fluid balancing method, and belongs to the field of petroleum extraction machinery. The pumping unit comprises a base, a supporting seat is fixedly installed on the base, and a motor, a speed reducer and a support are installed on the supporting seat. The walking beam is connected with the bracket through a bearing seat; an output shaft of the speed reducer is connected with the walking beam through a crank and a connecting rod of the four-rod mechanism; the two ends of the walking beam are connected with a first horse head and a second horse head respectively, the first horse head and the second horse head are communicated through a connecting pipe arranged between the first horse head and the second horse head, an electric valve is arranged on the connecting pipe, and an electric cabinet is further arranged on the supporting seat and electrically connected with the electric valve. The oil pumping unit is used for two oil wells close to each other, the function that one oil pumping unit pumps two oil wells is achieved, the equipment investment of one oil pumping unit can be saved, the running loss of one oil pumping unit is reduced, and fluid balance is used for balancing the load difference of the two oil wells; after the balance box is arranged on the second horse head, the second horse head can be only used for pumping oil of one oil well, and fluid balance is used for weight difference between the oil well and the balance box.

The invention provides a method for producing monopotassium phosphate by a solvent extraction method. The method comprises the following steps: (1) preparing a clear raw material solution; (2) adding the clarified raw material liquid and an extraction agent into an extraction crystallizer for extraction reaction; (3) standing for phase splitting, conveying an extracted organic phase into a reverse extraction tank, and conveying a raffinate water phase into a cooling crystallization tank; (4) carrying out cooling crystallization on the raffinate water phase in the cooling crystallization tank, and after cooling crystallization is completed, carrying out solid-liquid separation to obtain a solid which is monopotassium phosphate; (5) ammonia water is added into the reverse extraction tank for a neutralization reaction, after the neutralization reaction is completed, standing and phase splitting are carried out, an organic phase obtained through phase splitting is an extraction agent, and the extraction agent is stored in a storage tank and recycled; and concentrating the water phase obtained by phase splitting, cooling and crystallizing, and carrying out solid-liquid separation to obtain a solid phase which is ammonium chloride. According to the invention, the process flow for producing monopotassium phosphate by the existing solvent extraction method can be simplified, the equipment investment and operation cost are reduced, the requirement on raw material acid is reduced, and the production cost is reduced.

The utility model relates to a device for preparing pure silane from mixed chlorosilane, which comprises a silicon tetrachloride separation tower, a chlorosilane adsorption column, a silane reaction tower, a silane de-heavy tower, a silane adsorption column and a silane refining tower which are sequentially connected in series, and an upper end outlet of the silicon tetrachloride separation tower is connected with a lower end inlet of the chlorosilane adsorption column; an upper end outlet of the chlorosilane adsorption column is connected with a raw material inlet of the silane reaction tower; an upper end outlet of the silane reaction tower is connected with a raw material inlet of the silane heavy component removal tower; an upper end outlet of the silane heavy component removal tower is connected with a gas phase inlet of the silane adsorption column, and a lower end outlet of the silane heavy component removal tower returns to the middle part of the silane reaction tower; a gas phase outlet of the silane adsorption column is connected with a raw material inlet of the silane refining tower; and an electronic-grade high-purity silane product is obtained at a side line outlet of the silane refining tower. The device is suitable for continuous production of kiloton-grade high-purity silane and continuous production of kiloton-grade high-purity silane, and the energy consumption and the operation cost in the process can be reduced.

The invention discloses a method for extracting lithium from coal ash through roasting pre-ultrasonic treatment assisted leaching. The method comprises the steps of ultrasonic pretreatment, alkali roasting activation, acid leaching or alkali leaching and the like. According to the invention, ultrasonic pretreatment is carried out before alkali roasting activation, that is, a mixture of fly ash and sodium carbonate is subjected to wet mixing and ultrasonic treatment after a small amount of water is added, so that the obvious effect of saving chemicals and energy is shown; therefore, a better activation effect and a better lithium element leaching rate can be obtained under the conditions of using fewer roasting additives and shorter roasting time, and circular economy and low-cost operation of extracting lithium from the fly ash are promoted. The research shows that the coal ash has very obvious potential as a feasible lithium source, and particularly, the ultrasonic pretreatment can play a very important role in optimization and expansion of industrial application of coal ash roasting leaching.

The invention discloses a double-zeolite system composite catalyst and a preparation method and application thereof, and belongs to the technical field of synthesis of hydrocarbon compounds, the double-zeolite system composite catalyst is composed of a methanol synthesis catalyst and two molecular sieves with different product tendencies, the two different products refer to propane and butane, and the molecular sieves comprise beta, SSZ-13 and SAPO-34. According to the invention, carbon dioxide and hydrogen are used as raw materials, a ZnCr bimetallic catalyst and two molecular sieves with different product tendencies are compounded to form the bifunctional catalyst, the liquefied petroleum gas is directly synthesized under the reaction conditions of 350 DEG C and 5 MPa, and accurate regulation and control of the relative proportion of propane and butane in the LPG product can be realized. By regulating and controlling the relative mass of the double molecular sieves and accurately controlling the relative content of propane and butane in the LPG product, the large-range regulation of the weight ratio of propane to butane between 0.53 and 4.31 is successfully realized, meanwhile, the equipment investment can be reduced, the energy consumption can be reduced, the operation cost can be reduced, few byproducts are produced, and the economic benefit is remarkable.

The present application relates to the production field of organic chemical raw material cyclohexene, and discloses a production method of cyclohexene.The method comprises the following steps: carrying out cracking reaction on cyclohexylbenzene and / or dicyclohexylbenzene raw material and a solid acid catalyst to obtain cyclohexene and benzene; and the solid acid catalyst is selected from at least one of amorphous silicon aluminum, molecular sieve and solid supported inorganic acid.The method has the advantages of high raw material conversion rate, high cyclohexene yield and no by-product cyclohexane, etc.

The present invention discloses a method for deep unblocking of a fixed pipe column of an oil well with complex blockage in an offshore oil field. The present invention adopts a new unblocking process of "bubble-unblock-wash-test-pressure-wash", and the specific method is: treatment of organic scale in the wellbore and near the well: conduct injection process, pump-inject organic unblocking agent, and soak for 12 to 48 hours; treatment of inorganic scale in the wellbore and near the well: pump-inject inorganic unblocking agent, shut down the well for 6 to 24 hours after unblocking; well washing operation; stepped pressure test injection, shut-in test; treatment of composite blockage in medium and long-distance wells: staged high pressure and large liquid volume injection; well washing operation. The method of the present invention is suitable for unblocking complex blockages in oil wells with heavy crude oil or polymer organic scale and inorganic scale and large blockage radius in offshore oil fields, and has the advantages of reducing operating costs and simplifying processes; conducting test operations, with flexible selectivity to ensure the effectiveness of measures; high pressure does not break the reservoir, preventing sand from coming out of the formation or rapid decrease in liquid volume after operation; large liquid volume injection, unblocking and instantaneous replenishment of formation energy.

The invention relates to the technical field of offshore oilfield oil-water well development, in particular to an offshore platform continuous capillary steel pipe oil passing pipe cable cutting device and a using method. According to the technical scheme, the device comprises a pipe cable cutting part and a pipe cable recycling part, the other end of a continuous capillary steel pipe of the pipe cable cutting part is connected to the upper end of an underground pipe cable cutting device, and a well-staying pipe cable penetrates through a pipe cable cutting channel of the pipe cable cutting device; the lower end of the pipeline cutter is provided with a counterweight, the upper end of the pipeline cutter is connected with a hydraulic release, the upper end of the hydraulic release is connected with a rotary joint, and the upper end of the rotary joint is connected with a continuous capillary steel pipe; the device has the beneficial effects that the pipe cable cutting task can be efficiently, accurately and safely completed, the efficiency of offshore oil exploitation operation is improved, and the post-processing cost and the yield loss are effectively reduced; the problems of high cost and long time of single well operation on the offshore movable platform in the prior art are solved, the operation cost is saved, and production can be quickly recovered.

The present disclosure relates to a method and system for producing olefins by cracking heavy hydrocarbons, which comprises the following steps: S1, entering a gas-liquid separator for gas-liquid separation to obtain a first gas phase material and a first liquid phase material; and in the process of separation, introducing a separation aid into the gas-liquid separator to contact with the first gas phase material in countercurrent, so that the heavy components carried in the gas phase material are washed or condensed to obtain a second gas phase material; S2, making the second gas phase material enter the radiant section of a steam cracking furnace for cracking to obtain a cracking product containing olefins. The above technical solution can realize the production of olefins to a greater extent by a shorter process and smaller energy consumption.

The utility model discloses a preparation system of synthesis gas. The synthesis gas preparation system comprises a non-return mixer, a converter, a waste heat boiler and a steam superheater which are connected in sequence; the non-return mixer comprises a T-shaped pipe and a spraying assembly, and the spraying assembly comprises an L-shaped spraying pipe formed by communicating a first spraying pipe section and a second spraying pipe section perpendicular to the first spraying pipe section; the second spray pipe section faces the converter; the converter comprises a reaction chamber and a nozzle chamber which are coaxially arranged, the nozzle chamber is arranged at the top of the reaction chamber, and a mixed gas inlet is formed in the side face of the nozzle chamber; a nozzle is arranged in the nozzle chamber, and the axis of the nozzle coincides with the axis of the nozzle chamber. The nozzle includes a first tube and a second tube. By adopting the system, the conversion rate of methane, tar and fly ash can be improved, and meanwhile, high-quality superheated steam can be produced as a byproduct.

The present invention provides an oil production string and an oil production system. The oil production string includes: an oil pipe and a casing. The casing is sleeved on the outside of the oil pipe. An oil-casing annulus is formed between the casing and the oil pipe. A packer is arranged between the casing and the oil pipe. The packer separates the oil-casing annulus into an upper oil-casing annulus and a lower oil-casing annulus. The upper oil-casing annulus contains a heated heat-insulating liquid. The oil production system includes an oil production string, an oil production tree, a storage device, and a recovery device. The oil production string and the oil production system provided by the embodiments of the present invention can realize the wax prevention of the oil production string, and the heat-insulating liquid can also be recycled, which not only reduces the risk of wax deposition in the oil pipe, but also reduces the risk of mechanical wax removal and the operating cost.

The invention discloses a selective leaching and regeneration method and application of a layered ternary material based on a mixed cathode, and belongs to the technical field of waste lithium ion battery recovery. The method comprises the following steps: selectively separating a low-value spinel electrode material from a mixed cathode electrode by utilizing different stability of transition metal in an acid medium and ascorbic acid, treating a layered nickel-rich material under an alkaline hydrothermal condition, separating a manganese element and a nickel element in the mixed cathode electrode, and directly recycling and regenerating the waste layered nickel-rich oxide. By adopting the method, the manganese element and the nickel element in the positive electrode material can be effectively separated while the recovery cost is reduced, and the waste layered nickel-rich oxide is directly recovered. The battery prepared from the positive electrode material recycled by the technology is good in electrical performance, and the recycling method is simple and reasonable, controllable in cost, less in waste and suitable for commercial production.

The invention relates to the technical field of ammonia synthesis equipment, and particularly discloses a liquid ammonia conveying power recycling system of an ammonia synthesis device, which is used for solving the problem that power cannot be recycled in the prior art. Comprising an ammonia separator, a synthetic gas ammonia outlet separator valve is arranged at the discharging position of the upper side of the ammonia separator, a synthetic gas ammonia inlet separator valve is arranged at the feeding position of the left side of the ammonia separator, and a liquid ammonia discharging port of the ammonia separator is communicated with the feeding end of a first-stage flash tank through a liquid ammonia conveying pipeline; a discharging pipe at the top of the first-stage flash tank is provided with a flash steam delivery valve, a discharging pipe at the bottom of the first-stage flash tank is provided with a liquid ammonia delivery valve, and pressure energy in liquid ammonia produced by an ammonia synthesis device is converted into electric energy through an expansion machine; and abrasion and internal leakage damage of a valve core due to long-time operation of the liquid ammonia pressure reducing valve of the ammonia separator are avoided.

The application discloses a high-pressure oil well shaft wax removal device and a use method thereof, which comprises a cable head, an upper-end heating cutter head, a weight rod and a lower-end heating cutter head which are sequentially spliced. The cable head comprises a pin seat, an insulating sleeve wrapped outside the pin seat, a pressure-bearing shell arranged outside the insulating sleeve, a plug-in hole opened on the insulating sleeve, an insulating tube inserted into the plug-in hole, a conductive rod inserted into the insulating tube and connected with the pin seat, a second insulating pad sleeved on the conductive rod and a cable connector mounted on one end of the conductive rod. The weight rod comprises a shell, a plug-in hole opened in the shell and a single-core pin sleeve arranged on the plug-in hole. The application has the beneficial effects that the problems of wax deposition in the shaft and the oil pipe can be quickly solved, the construction cost is greatly reduced, the labor intensity of personnel is reduced, the production of the oil and gas well is accelerated, the construction period is greatly shortened and the operation cost is reduced.

The invention belongs to the technical field of coke oven gas purification, and particularly relates to an environment-friendly and efficient oxidation process desulfurization regeneration tail gas treatment system and a method thereof.The system is characterized in that the system is a multi-stage step-by-step washing system and comprises an alkaline washing tower, an acid washing tower and a water washing tower, and a regeneration tail gas inlet pipe is connected to the bottom of the alkaline washing tower; primary washing tail gas at the top of the alkaline washing tower is connected with the bottom of the pickling tower through a pipeline, secondary washing tail gas at the top of the pickling tower is connected with the bottom of the water washing tower through a pipeline, a bleeder is arranged at the top of the water washing tower, the bottom of the bleeder is isolated from the interior of the water washing tower through a partition plate, and an overpressure return pipe is arranged between an outlet of the tail gas fan and the bleeder and provided with a switch valve. And a pressure gauge is arranged on an outlet pipeline of the tail gas fan and is in interlocking control with the switching valve. The method has the beneficial effects that the existing environmental protection standard can be met, ammonia in the tail gas can be recycled, no sewage is discharged, and the method has the characteristics of environmental protection, high efficiency, stable and reliable process and easiness in implementation and popularization.

The present invention discloses a high-performance insoluble sulfur production system and method. The insoluble sulfur wet production system can be used to produce high-performance insoluble sulfur products through the combination of sulfur polymerization, quenching, crushing, aging, extraction, drying, oil filling and other units. The production system of the present invention is a liquid phase environment, which avoids safety problems such as system blockage and powder explosion caused by solid or powder material transportation. The production process has the characteristics of safety and reliability, simple equipment and operation, and obvious energy saving effect.

In order to solve the problems of high energy consumption and high equipment cost in the prior art of purifying crude ethylene glycol produced by the alcoholysis process of ethylene carbonate, the present invention discloses a purification method, purification system and application of crude ethylene glycol. The method comprises: subjecting the crude ethylene glycol to vacuum distillation, collecting the materials in the bottom of the tower to obtain ethylene glycol product I, and subjecting the materials at the top of the tower to vacuum distillation to obtain ethylene glycol product II. The present invention adopts a combined process of a vacuum continuous distillation tower and a vacuum intermittent distillation tower, and utilizes the characteristics that ethylene glycol and ethylene carbonate will form azeotropes within a certain pressure range. A small part of ethylene glycol in the feed is used as an entrainer to entrain the heavy component impurity ethylene carbonate that is difficult to separate from the top of the tower. Most of the high-purity polyester-grade ethylene glycol can be obtained at the bottom of the vacuum distillation tower. Through the pretreatment in the previous step, the processing capacity of the subsequent intermittent distillation tower can be greatly reduced, thereby reducing operating costs and equipment investment.

The present invention relates to the technical field of offshore oilfield oil and water well development, and in particular to an offshore platform continuous capillary steel pipe through oil pipe cable cutting device and a method of using the same. The technical scheme is: it includes a pipe cable cutting part and a pipe cable recovery part, the other end of the continuous capillary steel pipe of the pipe cable cutting part is connected to the upper end of the pipe cable cutting device downhole, and the well-retained pipe cable passes through the pipe cable cutting channel of the pipe cable cutting device; a counterweight is installed at the lower end of the pipe cutter, the upper end of the pipe cutter is connected to a hydraulic release hand, the upper end of the hydraulic release hand is connected to a rotary joint, and the upper end of the rotary joint is connected to the continuous capillary steel pipe; the beneficial effects are: the present invention can efficiently, accurately and safely complete the pipe cable cutting task, improve the efficiency of offshore oil production operations, and effectively reduce the post-processing costs and production losses; it avoids the problems of high cost and long time for single well operation on offshore mobile platforms in the prior art, saves operating costs, and can quickly resume production.

The utility model provides a combined type salvaging device which comprises a gap bridge pipe and a salvaging mechanism which is concentrically arranged in the gap bridge pipe and used for salvaging falling objects in a well, the falling objects in the well comprise rod-shaped falling objects and tubular falling objects, the salvaging mechanism comprises a first salvaging piece used for salvaging the rod-shaped falling objects, and a second salvaging piece used for salvaging the tubular falling objects. And the second fishing piece is arranged below the first fishing piece and is used for fishing the tubular fish.

The invention relates to the field of chemical waste treatment, and discloses a degradation method of a glycolate oligomer. In the presence of a catalyst, a raw material containing a glycolate oligomer is contacted with low-carbon alcohol for reaction, and the catalyst comprises 10-60 wt% of CuO, 2-12 wt% of NiO and 28-88 wt% of SiO2. The degradation method provided by the invention is simple in process steps, under the action of the catalyst, fusel oil is fully utilized, degradation conversion of the glycolate oligomer is realized, complex by-products are not generated while glycolate is degraded, and the conversion rate of the ester oligomer is relatively high. According to the method provided by the invention, the production process is further simplified, and the operation cost is reduced.

The utility model discloses a kind of multi-modal testing devices of simulated space environment, including vacuum chamber with vacuum module;Wherein, cooling module, heating module are respectively equipped in vacuum chamber, vacuum module, cooling module and heating module are respectively connected with the communication control module located outside;Vacuum chamber is also equipped with tray module, for placing sample to be measured;Cooling module can be relatively installed in vacuum chamber and displaced up and down, for adjusting the distance between it and sample to be measured;The utility model can greatly reduce the experimental time of cold and hot impact;While realizing the multi-modal testing effect of simulated space environment, reduce space solar cell array research and development test time and manufacturing cost of product control, help low-cost space technology development and application.

The invention provides green liquid paraffin and a production method thereof, and belongs to the technical field of paraffin. The preparation method comprises the following steps: carrying out catalytic hydrogenation reaction on raw materials, crystallizing, sweating, collecting wax, filtering, decolorizing, deodorizing and packaging to obtain the green liquid paraffin. The liquid paraffin is high in purity, low in device investment, simple in production process, low in operation cost and free of solvent pollution to the environment, and the solvent-free liquid paraffin production method is more efficient and practical and is expected to be widely applied to the fields of lubricants, chemical raw materials or fuels.

This invention belongs to the field of organic chemical technology and relates to an apparatus and method for preparing N,N-dibutylformamide. The apparatus includes a first distillation column, a second distillation column, a third distillation column, and connecting pipelines. Using the apparatus and method of this invention, high-purity N,N-dibutylformamide can be prepared safely and stably with high reaction efficiency and production capacity, short preparation time, low methyl formate loss, minimal equipment wear, low energy consumption, and high safety and stability.

The present invention discloses a waste gas treatment system and method for sludge drying and carbonization, comprising a burner, a secondary combustion chamber, a carbonization device, a drying device, a dust removal device, a heat exchange device, a washing device, a mixing device, an activated carbon adsorption device and a discharge cylinder connected in sequence; the heat exchange device comprises a first heat exchanger and a second heat exchanger connected in parallel; the interior of the carbonization device is connected to the secondary combustion chamber through a heat tracing pipe; the second heat exchanger is connected to any one or more of the burner, the drying device and the mixing device through an air duct; the washing device is connected to the first heat exchanger and the activated carbon adsorption device in sequence; the inlet end of the secondary combustion chamber is connected to the first reagent dosing device; the inlet end of the washing device is connected to the second reagent dosing device. The present invention solves the problems of low pollutant removal efficiency, failure to meet local standards in some areas, affecting the atmospheric environment of residents around the treatment plant, and high operating costs of a single waste gas treatment unit that can be grafted under the prior art.

The application discloses a layered sand prevention and polymer injection integrated pipe column and a construction method, relates to the technical field of oil exploitation, and the pipe column comprises a downhole pipe column and a control pipe column. The downhole pipe column comprises a layered sand prevention and polymer injection unit. The layered sand prevention and polymer injection unit comprises a positioning cylinder, an adjustable sand prevention and injection device, a blockage removal injection device and layered packers. The control pipe column comprises a positioning tool and a repeatedly switchable tool. The positioning tool can be positioned with the positioning cylinder, and the repeatedly switchable tool can control and regulate the adjustable sand prevention and injection device and the blockage removal injection device. The application realizes sand prevention and polymer injection integration through the adjustable sand prevention and injection device. The application realizes downhole efficient regulation through the positioning tool and the repeatedly switchable tool.