569 results about "Production effect" patented technology

The invention discloses a metal-organic framework nanosheet as well as a preparation method thereof and application thereof in oxygen evolution reaction of electrolysis water. According to the preparation method, the energy consumption is low, the reaction is rapid, reaction conditions are mild, the thickness of the obtained metal-organic framework nanosheet is 3nm-5nm, the specific surface area can reach 450m<2>.g<1>, and the alkali resistance and the chemical stability are good. The metal-organic framework nanosheet can be prepared into an electrolysis water oxygen production electrode, and a particular ultra-thin sheet structure can be in well contact with the surface of the electrode, so that influences on mass transfer, diffusion and material resistance in the electrochemical oxygen production process are overcome, the initial oxidation potential can reach 1.42V, and the overpotential at 10mA / cm<2> can reach 250mV. By virtue of a 24-hour test, the oxygen production effect is still maintained above 99.6%, the activity, stability and price of the metal-organic framework nanosheet are superior to those of traditional noble metal RuO2, and extremely high actual application value is achieved.

The invention discloses an exfoliative cells preserving fluid which is prepared from a pH buffering agent, an osmotic pressure maintenance agent, preservatives, a fixing agent for maintaining cellular morphology, an anticoagulant, a mucus softener, an antimicrobial reagent, a cleaning agent, a humectant and red blood cell destroying components. The components in the preserving fluid are reasonable in proportioning, and the exfoliative cells can be preserved at a long time under normal temperature, wherein the longest time can reach 2 years; mucus can be sufficiently dissolved and the red cells can be partially destroyed; a film production effect is good, cellular distribution is very even, cellular morphology is perfect, cytoplasm and cell nucleus demarcation is distinct, gradation is clear, and cytoplasm and cell nucleus transparency is very good, and the exfoliative cells preserving fluid can be simultaneously used for the HPV-DNA (human papillomavirus-deoxyribonucleic acid), Chlamydia and immunohistochemical test; the special liquid base preserving fluid used for the cytologic examination of other parts can be provided, an imported product can be completely replaced, and the cellular constituent with diagnostic significance can be sufficiently preserved; and the exfoliative cells preserving fluid is low in configuration cost and easy to popularize.

The invention discloses a drainage method of a non-cell-cementation cased-hole-completion coal bed gas horizontal well. The method includes: a U-shaped butted well is used, the horizontal section of the horizontal well is deployed along the declination direction of a coal bed and a direction parallel to the minimum main stress of the coal bed, and well completion is performed by using casing running and an external self-expansion casing packer in a non-cell-cementation manner; the setting section, perforation and fracturing section of the external casing packer of the horizontal well are optimized; perforation is performed in a large-displacement and fixed-direction hydraulic abrasive perforation manner, and slug insertion type sand-carrying fracturing is performed on the horizontal well section by section in a large-displacement, large-scale, high-prepad-fluid-ratio and medium-sand-ratio manner; draining is performed at the wellhead of a drainage vertical well, and gas production is performed at the wellhead of the horizontal well. The drainage method has the advantages that pollution of a coal reservoir and production and operation costs can be lowered, the fracturing transformation effect and draining and gas production effect of the non-cell-cementation cased-hole-completion horizontal well are improved, the drainage efficiency and effect of the horizontal well are increased, the coal bed gas content of soft, broken and low-permeability coal beds can be lowered in a large-range and fast manner, and intensified coal bed gas drainage is achieved.

This disclosure relates to aldolase, an aldolase mutant, and a method and a composition for producing tagatose by using the same. The feature of the disclosure is environment-friendly due to the use of an enzyme acquired from microorganisms, requires only a simple process of enzyme immobilization, uses a low-cost substrate in a substrate compared with a conventional method for producing tagatose and has a remarkably high yield, thereby greatly reducing production costs and maximizing production effects.

The invention offers an outer machine frequency control method used in air conditioning low temperature heat production. It separates refrigeration highest running frequency from heat production. The highest running frequency of compressor heat production is gained by calculating outer machine temperature and inner machine total power. It also adds heat production effect factor to optimize by controlling frequency.

The invention relates to an anaerobic fermentation technique for combinely processing feces and straws. The method comprises doing pile treatment to feces, and then mixing with disintegrated straws, adjusting water-content coefficient to 60%-70% to be used as bait of earthworms cultivation, through wormcast which is produced after earthworms eat bait into a methane tank to do methane tank to produce marsh gas. The invention solves the technical difficult problems of layered raw material, incrusted floating upward, difficult discharging, bad gas production effect and the like which are caused by directly utilizing straws to be marsh gas fermentation material and restricts straws to be household methane tank fermentation material for a long term, and meanwhile, wormcast which is used as marsh gas fermentation material has the functions of improving raw material gas production rate, improving anaerobic sludge activity and strengthening the stability of anaerobic fermentation process, and earthworm production improves economic output of handling process.

This invention relates to producing field of air conditioner, and especially relates to the system and method for detecting power supply modular and drive modular of frequency conversion air conditioner in its production process. Detecting system and method provided by this invention uses single-chip as core, and cooperates with exporting circuit of voltage measure signal, back-communication circuit of measure signal, communication circuit, indicator light circuit, control circuit of key-press. According to steps, automatically check and diagnose power supply modular and drive modular of frequency conversion air conditioner. And automatically export checking outcome. The invention can greatly reduce time of product line checking frequency conversion air conditioner, increase production effect. At the same time, this invention can check circuit which can not be checked by human. Further more, it can record trouble information of checked module and serial number of checked module with trouble. This invention is easy to do data analysis of trouble module and statistics product qualification rate. At the same time, the invention is easy to find reason of checked module with trouble.

The invention discloses a stage board rotating device of a butterfly-shaped stage. A stage board comprises a rotating platform, a large swinging turntable and a small swinging turntable which are combined, the rotating device comprises a hollow fixing frame, a hydraulic station and a drive motor, the rotating platform is of a hollow structure and comprises a horizontal platform board and a hollowannular support column fixedly connected with the horizontal platform board, the horizontal platform board of the rotating platform is placed on the hollow fixing frame, the top of the hollow fixing frame is provided with an inner ring rail, the lower end face of the horizontal platform board is provided with an inner ring bearing wheel which is placed in the inner ring rail to be matched with the inner ring rail, the lower end face of the support column of the rotating platform is provided with an outer ring bearing wheel which is driven by the drive motor, and the hollow fixing frame is provided with an outer ring rail matched with the outer ring bearing wheel. The rotating platform can be driven through the drive motor to rotate, and has a good stage production effect; and due to the adoption of a bottom wheel and side wheels, the stability during the integral operation of the stage is effectively improved.

The invention discloses a numerical analysis method applied to a leaking and channeling mechanism and a prevention and control method of an injection fluid. The method is used for carrying out research based on the fluid-solid coupling theory by virtue of a method with combination of indoor test, numerical calculation and field detection. By virtue of the method, typical mudstone is selected for carrying out indoor test under different water ratios and building an inversion model of stress and deformation of a point-changeable stratum of an inversion sleeve of deformation data of a sleeve. On account of a typical injection-production scheme, the accurate positions of leakage, interzone and flowing along fault are judged and optimized by comparing the numerical simulation and the field detection; finally, a reasonable injection-production scheme and a reasonable measure for preventing serious loss of injection water are provided; and the method has important application values of improving the injection-production effect of the oil field and improving the final recovery rate and the whole development level of the oil field.

The invention belongs to the technical field of tertiary oil recovery and particularly relates to a method for extracting oil in single well steam stimulation by combining microorganisms and CO2 in the heavy oil well. The method comprises the following steps: (1) screening test oil wells; (2) screening microorganisms and nutrients thereof; (3) injecting the microorganisms and the nutrients thereof into the stratum of the test oil well; (4) injecting liquid CO2; (5) shutting the test oil well down; (6) opening the test oil well for production. The method disclosed by the invention has the advantage of wide application range and is simple in process implementation; oil well sand production and sleeve damage situations are avoided and the oil well utilization rate is high; the thickened oil viscosity can be greatly reduced, the oil-water interfacial tension is reduced, the stratum energy can be effectively replenished, the characteristics of long action period, remarkable enhanced production effect of oil, and the like are achieved, and therefore, the method is an economic and effective method for increasing the yield of the heavy oil well and can be widely applied to a single well steam stimulation technology of the heavy oil well.

The invention relates to a method for generating biogas through anaerobic fermentation by taking traditional Chinese medicine dregs as raw materials. Medicine dregs produced in a pharmaceutical factory of traditional Chinese medicine are used as fermentation raw materials, are united with waste water of the pharmaceutical factory for anaerobic fermentation, and are properly proportioned with biogas slurry and water for composting pretreatment, a proper amount of NaOH is added after the mixture enters a pool, the TS (total solid) concentration of the fermentation raw materials is 7-9%, 10-15% of biogas slurry is added as an inoculum so as to realize quick start, and the biogas production efficiency is high. Partial biogas slurry flows back after normal operation so as to ensure the concentration of microorganisms in an anaerobic tank. The traditional Chinese medicine dregs are taken as main raw materials for fermentation to produce the biogas, cow dung and other fermentation raw materials do not need to be added, the operation is simple, the gas production effect is good, the utilization ratio of the raw materials is high, the problem of environment pollution caused by the medicinedregs and the waste water can be solved, and simultaneously biogas energy sources can be recycled.

The invention provides a gas lift method of a combined ball plug for drainage and gas production of an oil and gas well, characterized in that: fluid in a stratum flows in a well bottom (3) through a perforation evelet (2), air in a packer (4), the well bottom and a production drivepipe (5) forms a high pressure, when the pressure reaches some limit, the high pressure gas can enter a bottom oil pipeline (7) through a bottom gas lift valve device (6), the high pressure gas and the fluid in the bottom oil pipeline (7) mix and lift to a bulb stopper lifting oil pipeline (8), gas lift balls (16) are supercharged by a gas injection pipeline (12), and enter a gas injection and gas lift ball falling oil pipeline (9) through a bat device (11) and enter the bulb stopper lifting oil pipeline (8) through a gas liquid mixer (10), the gas lift balls and the fluid flow a well opening oil extraction tree (13) and to a ball collector (14), the gas lift balls (16) flow to the ball collector (14) and are separated to the bat device (11), the fluid flows along with an output pipeline (15), small balls (16) are continuously thrown in the bat device (11), and the whole process goes round and round. The gas lift method of the combined ball plug has simple structure and high reliability and is suitable for most drainage and gas production wells. The gas lift valve is mounted at the bottom to use stratum energy adequately so that the lifting efficiency is higher and the production effect is good.

A yoke assembly for a stator of a starter motor is disclosed including auxiliary poles and magnet springs, with each of auxiliary poles and each of the magnet springs taking the form of a subassembly. The subassembly, composed of each of the auxiliary poles preliminarily mounted on each of the magnet springs, is fixedly secured to an inner peripheral wall of a yoke. This allows the subassemblies to be easily assembled to the yoke in the same process as that in which a yoke assembly is assembled using the magnet springs in the absence of the auxiliary poles, providing assembling processes in common with an increase in mass production effect.

The invention relates to a full-automatic frame buckling molding production line. The full-automatic frame buckling molding production line comprises a feeding device, a cutting device, a rolling device, a conveying device and a frame buckling device which are sequentially connected. The frame buckling device comprises a mold core and punching blocks arranged on the two sides of the mold core; a rack-shaped press fit mechanism is arranged above the mold core and comprises an upper toothed strip and a lower toothed strip which are engaged. The full-automatic frame buckling molding production line further comprises a lower press fit board below the mold core and a driving mechanism. The device can be produced fully automatically, the production efficiency is high, the production effect is good, and efficient and rapid production is facilitated.

The invention relates to a technical process of manufacturing sheet metal components of automobile left and right wind guide covers. The technical process includes: step 1, blanking by using a plate shearing machine; step 2, shearing and punching fixed-length die materials; step3, shaping the die; step 4, folding the die; step 5, punching holes in the die in a separate manner; step 6, performing butt resistance welding; step 7, pickling and phosphatizing; step 8, performing electrostatic spraying; and step 9, loading and storing. The technical process in the invention increases the utilization rate of material and equipment, remarkably improves the working efficiency and increases the rate of qualified products. In the invention, raw material parameters, equipments in the workpiece process and manufacturing procedures and techniques are all designed. Therefore, good production effect is achieved.

The invention relates to a heat non-burning cigarette body and a manufacturing method thereof, and belongs to the field of heat non-burning cigarettes. The heat non-burning cigarette body comprises anauxiliary unit and a smoke production unit, wherein the auxiliary unit comprises a filter section, a cooling section and a hollow section; one end of the hollow section is connected with the smoke production unit, and the other end of the hollow section is connected with the cooling section; the cooling section is connected with the filter section; the smoke production unit is of a compact hollowtubular structure; the inner diameter of the hollow is 1 to 8 mm; the outer diameter of the column is 5 to 10 mm; the length is 10 to 60 mm. According to the heat non-burning cigarette body and the manufacturing method thereof, a paste smoke production material is made into the compact hollow tubular structure to further enhance the heat transfer and smoke production effect of the smoke production material and increase the suction number and the smoke concentration; furthermore, compared with a smoke production unit such as cut tobaccos and a sheet, the smoke production unit of the heat non-burning cigarette body cannot be covered by cigarette paper, so that a layer of cigarette paper is reduced, and the heat transfer effect between a heating tube and a smoke production material can be further enhanced.

The invention provides a multi-cyclic huff-and-puff late production method for thin heavy oil reservoirs. The method includes the steps of 1, injecting a well with steam; 2, during steam injection, injecting with nitrogen and micro-emulsion viscosity reducer; 3, shutting in the well; 4, lifting up a steam injection string, tripping in a production string, and performing pumping production. According to the method, aiming at the contradiction that fast progressive decrease, fast water content increase and energy decrease in the late period of thin heavy oil reservoir multi-cyclic huff-and-puff production worsen the production effect, the nitrogen and the micro-emulsion viscosity reducer are used to assist in steam enhanced thermal recovery before conditions of transferring to steam flooding are not met, reservoir energy is supplemented, steam conformance efficiency, thermal efficiency and displacement efficiency are improved, and multi-cyclic huff-and-puff production effect of thin heavy oil reservoirs is improved.

The invention discloses a workpiece scheduling method based on an ant colony optimization algorithm. The workpiece scheduling method is characterized in that workpieces are effectively selected in the scheduling process through the workpiece characteristics by using a Pareto multi-objective method, and production is performed by preferentially using the low-electricity-price period so that two objectives of optimizing electric power cost A and delay degree B can be realized. A better workpiece scheduling scheme is calculated under the environment of the parallel batch processor of the background of industrial time-of-use electricity price so that the utilization rate of enterprise resources and the energy use efficiency can be maximized, optimization of cost control and the production effect of the enterprise production process can be achieved and the market competitiveness of the enterprise can be enhanced.

The invention relates to a method for producing precast concrete piles, which comprises the following main steps of: manufacturing a reinforcement cage; placing the reinforcement cage into a die; pouring concrete into the die; centrifugally rotating; and carrying out steam curing. The method is characterized in that the die with the length of over 20 meters is adopted in the method; two or a plurality of precast concrete piles can be simultaneously produced by one die; upper and lower half dies of the die have a transporting mode of transversely moving in parallel in the direction vertical to the axis of a crane beam of a plant in the production process; and centrifugal equipment and a curing tank are transversely arranged in parallel in the direction vertical to the axis of the crane beam of the plant. Due to the adoption of the transverse flow production scheme of the long die, the production effect can be multiplied, the space occupied by the plant is greatly reduced, a great amount of lands are saved, the working efficiency is improved, and the production quality can be ensured.

The invention belongs to the field of standardized and digitalized management of a live pig breeding process and traceable supervision of a terminal product. The invention provides a mobile intelligent terminal-based building method of a pig breeding electronic record. In the whole design, the concept of modularization design is adopted; the traditional management method of a breeding file, using laws and regulations of feed additives and veterinary medicaments and the like are combined; and the software and hardware technology of a mobile intelligent terminal and the modern wireless communication technology are integrated. The method comprises the following steps of: 1) automatically identifying a two-dimensional bar code and a universal bar code which are specified by the Ministry of Agriculture; 2) moveably acquiring and processing data in an individual pig breeding process, wherein the information comprises ear tag wearing information, immunologic information, feed using information, veterinary medicament using information, monitoring and detecting information and the like; and 3) remotely managing and maintaining the record information in the breeding process. In the invention, associated communication technology, hardware and management software are integrated, so that digitalized mobile management in the live pig breeding process can be regulated and the feeding and management level and the production effect are improved, and more importantly, a way of quickly, conveniently and efficiently sensing the information of the individual animal is provided; and establishment, management and data sharing of a pig breeding electronic record database are realized remotely through seamless link between GPRS technology (2G) or TD-SCDMA technology (3G) and the Internet.

The invention relates to a system and a method for automatically adapting the gait of a virtual character to the terrain. The system and the method use input gait action of the character as reference data, the system automatically analyze key film frames of leg motion in the gait action, and use analyzed information to automatically generate various leg motion parameter combinations required by different terrains, thereby enabling input gait action data to be suitable for various terrains, and enabling generated results of gait animation to approach referenced motion capture data as much as possible. Through the system and the method in the invention, a user can achieve the animation production effect of automatically adapting the gait to any landform in real time only by inputting a virtual character and a segment of ideal gait motion data (a motion clip) of the character without giving a walking path and information of obstacles in the virtual environment in advance.

The invention relates to an integrated and combined gas production method of based on plunger gas lifting and foam drainage. The integrated and combined gas production method based on the plunger and the foam drainage solves the problems that the process existing of drainage gas production techniques is simplex and a multi-item dewatering and gas production technology under complicated changeable well condition is complex. According to technical scheme of the integrated and combined gas production method based on the plunger and the foam drainage includes the steps that a foam drainage rod is made firstly, the rod is a cylindrical plunger, a plunger main chamber is formed in the rod, trapezoidal grooves in spiral shapes are distributed on external surface of the main plunger body at equal intervals, fluid through holes are evenly distributed between the grooves, the plunger main chamber and the fluid through holes are connected through a small fluid channel; the main components of the foam drainage rod include polyethylene glycol, sodium dodecyl benzene sulfonate, imidazoline, polyoxyethylene alkyl ether and carboxymethyl cellulose; in the gas lifting and drainage stage of the plunger, the plunger lifts the liquid out of the well in a slugged mode; and the main plunger body is gradually dissolved, the foam drainage rod sinks to the bottom of the well, and dissolves to produces large amounts of foam, gas production is conducted through foam drainage. According to the gas production method, two drainage and gas production technologies are conducted spontaneously, the process is simple and the best drainage and gas production effect can be achieved.

The invention discloses a temperature-resistant type high-permeable waterproof and moisture-penetration thermoplastic polyurethane elastomer. The temperature-resistant type high-permeable waterproof and moisture-penetration thermoplastic polyurethane elastomer is prepared from the following components in parts by mass: 30 to 100 parts of macromolecular polyols, 5 to 50 parts of diisocyanate, 3 to 40 parts of micromolecular chain extender, and 0 to 20 parts of additive. The prepared temperature-resistant type high-permeable waterproof and moisture-penetration thermoplastic polyurethane elastomer has the advantages that the temperature-resistant type high-permeable waterproof and moisture-penetration thermoplastic molecule structure adopts a rigid section-environment sensing area-amorphous region multiple-block structure, a non-regular group is introduced to adjust the crystallizing temperature of the environment sensing area, the high temperature-resistant property is good, the processing temperature range is widened, the processing property is good, and the mechanical property is excellent; a one-step method is adopted, the preparation technology is stable, the requirement on equipment is low, the cost is low, and the large-scale production effect is realized; the plasticizing processing is good, the moisture-penetration property is adjusted according to requirements, the degradability is realized, and the green, environment-friendly and non-pollution effects are realized; the elastomer can be widely applied to the fields of clothes, home, medical articles and the like.

The invention discloses a preparation method of matte aluminum-plated paper. The preparation method comprises the following steps of (1) coating: coating a PET (polyethylene glycol terephthalate) thin film with a matte transfer coating, so as to prepare a matte transfer film; (2) aluminum plating: performing vacuum aluminum plating on the matte transfer film by a vacuum aluminum plating machine, wherein the vacuum degree is 0.2 to 0.3Pa, the temperature is -140 to -160 DEG C, and the thickness of the aluminum layer is controlled to the value shown in the description; (3) compounding: coating the aluminum-plated matte transfer film with a composite glue on a wet coating machine, compounding with bottom paper, and coating the bottom paper with a back adhesive; (4) stripping: separating the compounded and cured aluminum-plated layer of a product from a substrate PET thin film on a stripping / coating dual-purpose machine, and transferring to the surface of the bottom paper, so as to obtain the matte aluminum-plated paper. The prepared matte aluminum-plated paper has the advantages that the color fusion of the paint film is avoided, the color phase is uniform, the printing suitability is good, the production effect is effectively improved, and the production cost is reduced.

The invention relates to a maize straw quick ensiling complex microorganism additive which comprises the following components of aspergillus oryzaze, plant lactic acid bacteria, and a mixture of plant lactic acid bacteria and lactic streptococci. A use method comprises the following steps : 1) smashing green maize straws to prepare maize straw powder; 2) adding an organic carrier which is formed by mixing maize powder and bran into the smashed maize straw powder, uniformly mixing the materials until the water content rate of the mixture keeps 65-70%, and taking the mixture as an ensiling raw material; and 3) uniformly spraying a complex microorganicm additive in the ensiling raw material, and simultaneously, spraying an inorganic additive formed by mixing salt, urea and water into the ensiling raw material wherein the compacted density is 550-650kg / m<3>, the fermentation temperature is 25-30 DEG C, and the closed compacted anaerobic fermentation is carried out for twenty-four to twenty-six days. The maize straw quick ensiling complex microorganism additive and the use method have the advantages that the use effect of the ensiling microorganism additive is improved, the quality of ensiled feed is improved, the time for ensiling the maize straws is shortened, and the ensiling production effect can be improved.

The invention discloses a high-frequency variable displacement volume fracturing method for an atmospheric pressure shale gas reservoir. The method comprises the steps of (1) evaluation of shale key reservoir parameters, (2) optimization of crack parameters, (3) determination of geological engineering filling points and determination of cluster perforation positions, (4) optimization of fracturingconstruction parameters, (5) cluster perforation operation, (6) acid pretreatment operation, (7) injection construction of acid slick water for making main cracks, (8) neutral slick water high-displacement injection construction (9) 140-230 mesh or 70-140 mesh proppant middle-displacement injection construction (10) low-displacement injection construction of sealing liquid; (11) repeating of thesteps (8)-(10) until the total liquid amount and the proppant of a current section are used up; and (12) displacement operation. According to the invention, an acidic slick water system and a neutralslick water high-frequency variable displacement process are adopted. The production effect of the atmospheric pressure shale gas well after fracturing is improved, and the aim of economically and effectively developing the atmospheric pressure shale is better achieved.

The invention discloses a method for preparing hexafluoropropylene oxide oligomer. Alkali-metal fluoride salt, aprotic inertia polarity organic solvents, fluorine-containing organic solvents and perfluoro(2-methyl-3-oxahexanoyl)fluoride are used for preparing a homogeneous activation initiator, the homogeneous activation initiator is used for initiating a hexafluoropropylene oxide monomer to have a polymerization reaction, and then the hexafluoropropylene oxide oligomer with a high molecular weight is obtained. Meanwhile, a part of products and related solvents are recycled, and an environment-friendly recycle production effect is achieved.

The invention belongs to the technical field of pharmaceutical chemistry and particularly discloses a benzimidazole derivative and a preparation method and medical application thereof. The benzimidazole derivative comprises a ligustrazine and an NO donor derivative and rapidly releases the ligustrazine or NO in vivo, accordingly the benzimidazole derivative and azilsartan produce effective synergistic effect, the anti-hypertensive treating effect is improved, the untoward effect is reduced, and the benzimidazole derivative has fairly ideal production effect on the liver and kidney of a patient and fills the blank in the prior art.

The invention discloses a ball-throwing type layered sand control process pipe column and a method thereof. The pipe column comprises a sand control outer pipe and a sand control inner pipe placed inside the sand control outer pipe, wherein the sand control outer pipe comprises a top suspension setting mechanism, a reverse well-flushing device, external filling devices, screen tubes and a pipe plug from top to bottom, and the top suspension setting mechanism, the reverse well-flushing device, the external filling devices, the screen tubes and the pipe plug are connected in sequence. The sand control inner tube includes a releasing mechanism, inner filling devices, a switch mechanism and a bottom positioning device from top to bottom, wherein the releasing mechanism, the inner filling devices, the switch mechanism and the bottom positioning device are connected in sequence. The number of the inner filling devices is consistent with that of the external filling devices in each oil reservoir, and the inner filling devices and the external filling devices correspond to each other in the radial direction. Internal well-flushing valves are installed between every two inner filling devices. The ball-throwing type layered sand control process pipe column and the method thereof can realize completion of layered sand control construction of a multiple zone by one-trip pipe column, ensureindependence between layers, and give full play to the productivity of each small layer to achieve the best sand control production effect.

The invention relates to a method for improving effective paving of propping agents in a large and thick reservoir. When the large and thick reservoir is perforated, with consideration that hydraulic fissures can be extended in the longitudinal direction and can be communicated with the whole reservoir during fracturing and with the consideration of the influence of the propping agents on the paving of the propping agents when the propping agents settle towards the bottoms of the fissures during propping agent conveying and according to the physical difference of the large and thick reservoirin the longitudinal direction, the large and thick reservoir is perforated in a centralized way; and during fracturing, the pavement of the propping agents in the hydraulic fissures can be adjusted by using a sand technology of combination of propping agents with different densities, different settlement speeds of the propping agents with different densities, and convective motion between sand carrying liquids with different densities, so that the propping agents can be effectively paved in the fracturing layer in the longitudinal direction according to the different requirements of physical properties of the reservoir on propping flow guidance capacities of fissures. The method can effectively overcome the defects of the prior art, and improve the propping efficiency, and the increase production effect of the improved reservoir fracturing.