54results about How to "Improve corrosion ability" patented technology

The invented method includes the physical separation method combining with the preparation procedure of the cleaning wet recycle, providing the features of simple and high purity of the recovered metal. The invention includes following steps. With the disused lithium ion cells being burned in the high-temperature furnace, the organic dielectric is removed. After the smashing and sieving treatment, the oversize material is processed through the magnetic separation and the eddy current sorting so as to obtain the iron case, copper foil and aluminium foil etc. The undersize is processed through the steps of corrosion, filtering and electrolysis so as to obtain copper and cobalt. With carbonic acid radical being added to the solution richen in lithium ion, the high purity carbonate of lithiumis formed so as to recovery lithium.

The invention discloses a solidification treatment process of smelting waste of lead and zinc. The solidification treatment process is characterized in that surface active agent, stabilizing agent, adsorbent and lime are added into and mixed uniformly with the smelting waste of lead and zinc; water-reducing agent, active blending material, river sand and water are added into and mixed uniformly with the hydraulic binding material; the pretreated smelting waste of lead and zinc is added into the pretreated hydraulic binding material, placed for 24 hour under room temperature after uniformly stirred and formed, then demoulded and stored in a slag storeroom. The solidification treatment process has the characteristics of good solidification effect, simple process, low cost, easy-to-get raw material, and the like.

The invention relates to an authigenic acid system and its application. The authigenic acid contains ZX-339 and ZX-368 components, the mole ratio of n(ZX-339) to n(ZX-368) is 5:8. Under a reaction temperature of 70DEG C-100DEG C, 19%-21% hydrochloric acid can be produced. The ZX-339 is any one of allyl chloride, benzoyl chloride, and a chlorinated organic ammonium salt. The ZX-368 is any one of polydimethylaminobenzaldehyde and polyhexa aldehyde. A clean acid fracturing fluid system is employed to carry the authigenic acid system to deep stratum. During application, the authigenic acid is compounded from, by weight: 2% of ZX-19, 15-20% of hydrochloric acid, 2% of ZX-09, 1% of ZX-10, (12-18)% of ZX-339, (10-16)% of ZX-368, and the balance water. The corrosion ability of the authigenic acid is equivalent to 70%-74% of that of isoconcentration hydrochloric acid.

The invention relates to a water-based emulsion composite blocking remover, and belongs to the technical filed of petroleum water injection wells and oil well plug removal, yield increase and injection increase liquids. The water-based emulsion composite blocking remover is prepared by mixing an inorganic blocking remover with an organic blocking remover according to a mass part ratio of 4-6:1; a complex long-chain fatty acid monoalkyl ester and polyol organic polyether ester mixture is adopted as the organic blocking remover to effectively prevent crude oil emulsification and organic scale formation in oil reservoirs, resolves emulsification and organic scale plugging, and is in favor or recovering the crude oil and increasing the injection of water injection wells. A stratum mineral total rock analysis result shows that the water-based emulsion composite blocking remover adopting a concentration of an organic acid can remove plugging near inorganic scales, has very good reservoir reconstruction characteristic and very good compatibleness with a reservoir fluid, has a good comprehensive plug removal effect on organic matter plugging, and is simple to produce. The problems of severe influences of only treatment of inorganic scales, strong corrosion ability of the inorganic scales, poor plug removal effect of the organic scale plugging and weak corrosion ability of organic scales on the injection ability of the water injection wells and the production power of oil wells are solved.

The invention relates to active mixed acid plugging removal solution applicable to a low permeability reservoir and mainly solves the problems of short period of validity and poor plugging removal and augmented injection effects when conventional mud acid and composite acid methods are adopted for plugging removal treatment on low permeability formation. The active mixed acid plugging removal solution consists of the following components in proportions according to weight percent: 9-10% of acetic acid, 5-7% of formic acid, 2%-3% of bifluorid acid ammonium, 2%-4% of boric acid, 1.0-2.0% of corrosion inhibitor, 2.0-4.0% of mutual solvent, 2.0% of clay stabilizer, 0.5-1.0% of dewetting active agent and 67.0-76.5% of water. The active mixed acid plugging removal solution applicable to the low permeability reservoir can delay the reaction rate of acid rock, increase the effective operating distance of acid solution, and realize the acidification of deep formation, and simultaneously can improve the oil and water seepage characteristics and increase the water phase permeability.

The invention relates to a rare earth stannum copper alloy, belonging to the technical field of the alloying of metal material and the anti-corrosion; the invention comprises copper, zinc, stannum, aluminum, nickel, manganese, antimony, boron, mischmetal containing mainly light rare earth elements such as lanthanum and cerium, each component element takes up the weight proportion as: copper 69-71%, stannum 0.5-1%, aluminum 0.1-0.5%, nickel 0.1-0.5%, manganese 0.1-0.6%, antimony 0.01-0.05%, boron 0.002-0.02%, mischmetal containing mainly light rare earth elements such as lanthanum and cerium 0.02-0.2%, the rest is taken by zinc and impurity with the total volume of no greater than 0.05%, the sum up of each component element is 100%. The invention aiming at the high corrosion resistance requirements by a condenser tube for heat exchange, via optimized design and multiple test, is finished to improve the anti-stress corrosion rupture performance, and level up the anti high C1-, NH4+, S2- ion density corrosion performance of polluted water.

The invention relates to a method for pretreating a technical cavity of a plasma device, which is applied to the aluminous inner wall or the surface of an interior part of the technical cavity to form a protective layer. The invention comprises the steps of: carrying out fluorization on the inner wall and the surface of an interior part with plasma containing fluorine, and forming an aluminum fluorine compound barrier layer at the inner wall and the surface of an interior part. The aluminum fluorine compound formed by the invention has strong binding force with the inner wall of the technical cavity and the interior part, the size of the binding force of all parts is basically same, the corrosion resistance of the plasma is increased, particulate pollutant can be avoided or reduced, and compared with a spraying method, the invention has low cost and reduced manufacture difficulty.

The invention provides environment-friendly acidizing working fluid suitable for low-permeability coalbed methane reservoir stimulation, and belongs to the technical field of coalbed methane development. The environment-friendly acidizing working fluid is composed of organic acid, a chelating agent, an anti-swelling agent and a corrosion inhibitor, and every 100 parts of water includes the following components in parts by mass: 7-9 parts of organic acid, 4-5 parts of the chelating agent, 4 parts of the anti-swelling agent and 0.5-1 part of the corrosion inhibitor; and the organic acid is composed of formic acid and citric acid, the chelating agent is composed of glutamic acid N,N-oxalic acid (GLDA) and N-beta-hydroxy ethyl ethylenediamine triacetic acid (HEDTA), and the anti-swelling agentis composed of potassium chloride and ammonium chloride. The environment-friendly acidizing working fluid has the good corrosion effect on crystalline minerals in coal rock, can increase the crack width and porosity of the coal rock, and thus increase the gasometry permeability; and meanwhile, the corrosivity of the environment-friendly acidizing working fluid to pipes is low, pollution to coal mine groundwater cannot be caused, the quality of coal products produced in the later period cannot be affected, and the environment-friendly acidizing working fluid has good application prospects in low permeability coalbed methane reservoir stimulation.

The invention discloses an acidification blocking remover used for removing coal-bed gas well pollution blockage. The acidification blocking remover comprises the following components in percentage by weight: 3.0-5.0% of sulfamic acid, 3.0-5.0% of ammonium bifluoride, 0-2.0% of acetic acid, 1.0-2.0% of butynediol, 1.0-2.0% of formaldehyde, 0.5-1.0% of ammonium chloride, and the balance of water. The acid liquor disclosed by the invention is strong in corrosion ability, low in corrosion velocity; the materials are mainly solids, convenient to purchase and transport, low in cost, easy to prepare, and obvious in construction application effect, so that a purpose of unblocking and increasing yield for the coal-bed gas well is effectively achieved.

The invention discloses a metallographic etching method. The method comprises the steps of: 1) preparing a corresponding etching agent according to the composition of a to-be-etched metallographic sample; 2) adding a certain amount of the etching agent into a container, and immersing a to-be-detected polished mirror of the ground metal sample in the etching agent; 3) putting the container into an ultrasonic vibration instrument, adjusting a corresponding frequency, conducting ultrasonic treatment for a certain period of time, and then blow drying the metal sample with a blower; and 4) observing the detection surface of the metal sample through a metallographic microscope and determining the etching effect. The method provided by the invention accelerates the microscopic electrochemical reaction on the polished surface during metallographic etching, enables even etching of the polished surface of a related sample, reduces the interference of human factors, and can accurately determine the etching reaction time so as to achieve an excellent etching effect.

The invention discloses a complex acid mixed liquid applicable to acidification of carbonate reservoirs. The complex acid mixed liquid is composed of 3 to 5% of ethylenediaminetetraacetic acid, 10 to50% of glutamic acid diacetic acid and 45% to 87% of water. The complex acid mixed liquid of the invention can be applied as an acidifying solution for a carbonate reservoir. In operation, the complexacid mixed liquid is uniformly mixed with water according to a volume ratio of 1: (1-3) by volume at first; then the obtained mixture is annularly pumped into a target acidifition horizon along an oil pipe and a casing pipe in virtue of a pump truck; and lifting and dropping of tubular columns are carried out in 1 to 3 hours after stopping of pumping. The complex acid mixed liquid of the invention has the advantages of high corrosion capacity, low corrosion degree to the tubular columns, no generation of secondary precipitates, strong retarding ability, and capacity of directly entering a production pipeline without flowback of residual acid.

The invention provides a high-strength oil-resistant storage battery case material and a preparation method thereof. The technical scheme is as follows: the preparation method comprises the following steps: uniformly mixing 83-93 parts by weight of ABS (acrylonitrile-butadiene-styrene) resin, 4-10 parts by weight of polyester material and 2-8 parts by weight of compatilizer, sending into a double screw extruder, carrying out six-region reaction molding, cooling, drying and granulating to obtain the plastic alloy. The plastic alloy maintains the advantages of high impact resistance and beautiful appearance in the ABS resin, greatly enhances the organic solvent corrosion resistance, and is very suitable for lead-acid storage battery cases in organic oil and other organic solvent environments.

The invention discloses an asphalt composition and a preparation method thereof. The asphalt composition is prepared from the following components in parts by mass: based on 100 parts by mass of matrix asphalt, 5 to 70 parts of softener, 5 to 200 parts of modifier, 5 to 150 parts of filler and 1 to 10 parts of fluxing agent. The asphalt composition disclosed by the invention has the advantages ofgood storage stability, good fuel and oil solubility resistance and corrosion resistance, and good usability at high and low temperatures.

The invention provides a high-temperature sandstone oil reservoir retarded acid and a preparation method thereof. The high-temperature sandstone oil reservoir retarded acid is composed of the raw materials of cyclodextrin, sulfonic acid and ammonium fluoride with a molar ratio of 1:1-2:2-8, the balance being water. The preparation method comprises the following steps: a, recrystallized and fully dried cyclodextrin is placed in a mortar; a proper amount of a solvent is added, and the mixture is stirred into a paste; b, sulfonic acid powder is added into the paste obtained in the step a, and the mixture is ground for 1-2h, such that a uniform viscos paste is obtained; the paste is subjected to constant-temperature drying for 8-12h under a temperature of 50 DEG C in a baking oven, such that a white powdery substance is obtained, wherein the substance is a clathrate of cyclodextrin and sulfonic acid; and c, ammonium fluoride is mixed with the clathrate obtained in the step b, such that the high-temperature sandstone oil reservoir retarded acid is obtained. Compared to existing retarded acids, the high-temperature sandstone oil reservoir retarded acid provided by the invention has the characteristics of high-temperature resistance, good retardance and high corrosion capacity.

The present invention discloses a compound acid solution blocking remover for oilfield clogging. The blocking remover comprises the following components by weight: 10-15% of hydrochloric acid, 8-12% of succinic acid, 2-5% of a stabilizer, 0.3-0.8% of a corrosion inhibitor, 0.5-1% of an additive and 70-80% of water. The product provided by the invention is a composite acid compounded from a plurality of organic and inorganic acids, corrosion inhibitor, stabilizer, and additives through the scientific process conditions, has the characteristics of chemical stability, high dissolution rate, low damage and corrosion resistance, can effectively relieve the blockage and damage caused by inorganic and organic matters in the formation, increase the permeability of the formation and reach the effect of increasing yield and injection of oil wells.

The invention relates to a blocking remover, in particular to a safe blocking remover for a polymer injection well of an oil field. The safe blocking remover for the polymer injection well of the oil field efficiently and safely removes blocking of the polymer injection well. The blocking remover comprises the following ingredients by volume percentage: A, 1.0-5.0% of diradical curing cracking agent, B, 3.0-6.0% of dispersing agent, and C, 1.0-5.0% of self-gas generation foaming energization diffusant. With the adoption of the scheme, the remover can efficiently and safely dissolve the blocking caused by polymers in the oil field, is high in blocking removal efficiency, can thoroughly remove the blocking caused by the polymers, overcomes the hidden danger of unstability of the common blocking remover, has a sterilization function, can improve water quality and prevent re-formation of the blocking, improves in-place permeability, flowability of crude oil and recovery efficiency of the crude oil, increases a water injection rate of the well, is simple in configuration and convenient to use, shortens the construction time and lowers the construction cost.

The invented method includes the physical separation method combining with the preparation procedure of the cleaning wet recycle, providing the features of simple and high purity of the recovered metal. The invention includes following steps. With the disused lithium ion cells being burned in the high-temperature furnace, the organic dielectric is removed. After the smashing and sieving treatment, the oversize material is processed through the magnetic separation and the eddy current sorting so as to obtain the iron case, copper foil and aluminium foil etc. The undersize is processed through the steps of corrosion, filtering and electrolysis so as to obtain copper and cobalt. With carbonic acid radical being added to the solution richen in lithium ion, the high purity carbonate of lithiumis formed so as to recovery lithium.

The invention belongs to the technical field of metal surface treatment and particularly discloses a steel structure surface corrosion prevention process. The steel structure surface corrosion prevention process comprises the following steps: S1, pretreating by washing and removing rust on the surfaces of steel structures, blasting sand and roughening through dried and compressed oil-free air; S2,preheating the pretreated steel structures for 25-35 minutes under the condition at 240-260 DEG C; S3, spraying by carrying out hypersonic flame spraying the surfaces of the steel structures througha hypersonic flame spraying device; and S4, cooling. Through the steel structure surface corrosion prevention process, the corrosion resistance of the steel structures in the corrosion environment with acid rain and neutral salt mist can be effectively improved; the mass loss of the steel structures caused by corrosion can be avoided; the structure strength and the corrosion resistance of the steel structures can be obviously improved; the service life of the steel structures can be prolonged; the corrosion prevention process is simple and is convenient to operate and low in cost.

The invention relates to a novel light roasting fireproof product used for a flue-cured tobacco machine furnace, which comprises the following raw materials by weight percentage: 77-91% of mixed flint clay, 0-10% of carbonization silicon powder, 2-3% of silica micro powder, 2-3% of Guangxi white clay and 6-8% of binder sodium silicate, the physical and chemical indexes of the carbonization silicon powder and the silica micro powder are characterized in that SiC in the carbonization silicon powder is greater than or equal to 95%, and SiO in silica micro powder is greater than or equal to 93%. wherein the mixed flint clay is mixed by 20-25% of crude pellet flint clay with granularity of 5-3mm, 20-25% of intermediate pellet flint clay with granularity of 3-1mm, 10-15% of fine pellet flint clay with granularity of 1-0.088mm and 30-40% of powder flint clay with granularity less than or equal to 0.088mm with weight ratio, The novel light roasting fireproof product has good thermal shock stability and strength, can block the erosion of flue gas and slag, spalling damage of the product can be avoided, the spalling damage of the light roasting product used for tobacco machine furnace, and a furnace shell can be effectively protected.

The invention relates to a carbon steel pickling solution, and applications thereof, and more specifically relates to a carbon steel pickling corrosion inhibitor used for avoiding corrosion of acid on carbon steel materials and excessive consumption of a pickling solution in pickling process of carbon steel and products of carbon steel, and applications of the carbon steel pickling corrosion inhibitor, and belongs to the technical field of carbon steel pickling solution. The carbon steel pickling solution can be widely used at normal temperature; sulfuric acid and phosphoric acid are taken as the main inorganic acids; corrosion inhibitor polyethylene glycol, thiourea, hexamethylenetetramine, and urea are added at the same time; surfactant fatty alcohol ether sodium sulfate and nonylphenol polyoxyethylene ether are combined with oleic acid and oxalic acid. The carbon steel pickling solution is capable of inhibiting excess corrosion of pickling solution, increasing the cleanliness and washing efficiency of carbon steel part surfaces greatly, reducing acid concentration of pickling waste solution, and reducing processing difficulty greatly.

The invention belongs to the technical field of oil and gas field production increase and transformation, and particularly relates to a temporary plugging agent for fractured reservoir acidification,and a preparation method thereof. The temporary plugging agent is prepared from, by weight, 70-90% of a main agent, 2-5% of a catalyst, 3-10% of an adhesive, 3-10% of a dispersing agent and 2-5% of afilm coating agent. The preparation method comprises the following five steps: preparing materials, mixing the raw materials, vacuumizing, preparing solid particles, coating and drying, and the temporary plugging agent is prepared through reacting and synthesizing by using a high-temperature stirring kettle and a double-screw extruder under the vacuumizing protection condition. A viscous acid liquid is generated by changing the reaction of the acid liquid and the temporary plugging agent, so that the acid rock reaction rate is reduced, the corrosion capacity of the acid liquid to a fracturedstratum is improved, and meanwhile, the temporary plugging diversion effect and the acidification effect are improved.

The invention relates to a graphene reinforced alumina-based ceramic bearing for a robot, which is prepared by the following steps: mixing alumina ceramic powder and graphene powder by using a three-dimensional mixer to obtain uniformly mixed alumina-based ceramic core powder; mixing the ceramic powder and a plasticizer to prepare required ceramic slurry, pressing a wet ceramic core sample by using a hot-press injection molding method, and sintering the obtained wet ceramic core under the protection of an inert atmosphere to obtain the graphene-reinforced alumina-based ceramic core. Accordingto the invention, the graphene material with excellent mechanical properties and thermal properties is innovatively introduced into the alumina-based ceramic core material system, the preparation process of the graphene-reinforced alumina-based ceramic core material is simple and feasible, the operability is strong, and the prepared ceramic core has excellent high-temperature properties and is easy to dissolve. The ceramic core can meet the preparation and use requirements of the single crystal hollow blade, and the size precision and the percent of pass of the blade can be guaranteed.

A floating sealing type rotary compensator is used for compensating thermal expansion of a pipeline. The floating sealing type rotary compensator comprises an inner cylinder (1) and sealing filler (3) which surrounds the inner cylinder. The outer circle part of the sealing filler is covered with a sleeve (2). The end face of an inner flange at the left end of the sleeve and the left end face of an outer cylinder (4) can pressurize the sealing filler. The floating sealing type rotary compensator further comprises a limiting device for the inner cylinder so that the axial position between the inner cylinder and the sleeve can be kept. The floating sealing type rotary compensator has the beneficial effects that the sleeve and the outer cylinder pressurize the two sides of the sealing filler, and the sealing filler can make uniform and tight contact with the sleeve and the inner cylinder; and compared with the prior art, the sleeve compensator has the beneficial effects that the right pressure of the sealing filler is improved, the fluid corrosion resisting capacity of the right part of the sealing filler is enhanced, and the reduction of the sealing performance is effectively prevented. The limiting device of the inner cylinder is arranged on the exterior, and assembling of the floating sealing type rotary compensator is facilitated.

The invention discloses an acid liquor system for online acidification of a water injection well for oil exploitation and a preparation process thereof. The acid liquor system comprises the following components in percentage by mass: 30-40% of composite acid liquor, 5-15% of retarding liquid, 5-10% of a chelating agent, 5-10% of a composite additive and the balance of water, the preparation process comprises the following specific steps: S1, preparation of a composite acid solution: S11, primary reaction; S12, secondary reaction; s2, preparing a retarding solution; s3, preparing a chelating agent; s4, preparing a composite additive; and S5, mixing to obtain the acid liquor system. The acid liquor system for oil exploitation is a multi-component acid which is mainly composed of hydrochloric acid and is formed by mixing multiple organic acids, the two different acids can play an acidizing role in different time ranges, the acidizing range in oil exploitation can be effectively expanded, meanwhile, the preparation process is optimized so that the acid liquor system can meet the requirement for online acidizing of the water injection well, operation is fine, risks existing in the preparation process are reduced, the acid liquor performance is high, and operation is convenient.

The invention relates to acid mixed solution, in particular to a chelating acid of sandstone for the yield increase of oil-gas fields. The technical scheme is that: the chelating acid is prepared from citric acid, citrate, ammonium salt, ethylene diamine tetraacetic acid and surfactant in a ratio of (1-25):(1-20):(1-20):(0.01-1):(0.01-1). The chelating acid has the advantages that: the pH of a chelating acid system is more than 5, so that the chelating acid has small corrosion to metal pipelines and drilling equipment; the chelating acid has high dissolution to the sandstone, and the dissolution rate of the sandstone is more than 10 percent; the chelating acid also can effectively avoid the generation of secondary sedimentation; and the acid has excellent sustained-release effect, and can enter a deep stratum to work.

The invention relates to the field of functional plastic, and specifically relates to a special material for cleaning a plastic screw extruder and a preparation method. A thermoplastic elastomer is used as a carrier; through compounding a ceramic micro-sphere, a poly-prismatic particulate stripper, which is prepared from polytetrafluoroethylene clad quartz sand, and an activator, the high-efficiency stripping and cleaning on a scale deposit and a residue in the screw extruder are realized; the special material is not only high in cleaning efficiency, but also avoids the damage of high-shearing grinding to a screw. Particularly, the special material is mainly prepared from inorganic matters, keeps stable melt viscosity at both a high temperature and a low temperature, generates stable adhesive stripping and shearing friction to the screw, and has favorable adhesive stripping performance and frictional scraping performance on the scale deposit and the residue in the screw when being used; meanwhile, special plastic can be repeatedly used, has favorable anti-degradation performance and anti-oxidation performance; especially, the special plastic is used for similarly better removing the scale deposit of the screw for processing complicated components of modified plastic, high-viscosity plastic, cross-linked rubber and the like by utilizing the stripping property and the viscoelastic property of the special plastic.

The invention discloses an explosionproof communication cable. The explosionproof communication cable comprises a conductor, wherein a conductor shielding layer is fixedly connected with an outer surface of the conductor, a high-temperature resistant layer is coated an outer surface of the conductor shielding layer, a fireproof mica tape layer is arranged on an inner wall of the high-temperature resistant layer, a ceramic fireproof fiber tape layer is arranged on an outer surface of the fireproof mica tape layer, a Sb2O3 layer is arranged on an outer surface of the ceramic fireproof fiber tapelayer, a filling layer is coated on an outer surface of the high-temperature resistant layer, and an insulation layer is coated on an outer surface of the filling layer. By application of the conductor, the conductor shielding layer, the high-temperature resistant layer, the fireproof mica tape layer, the ceramic fireproof fiber layer, the Sb2O3 layer, the filling layer, the insulation layer, theexplosionproof layer, a polystyrene layer, a polyethylene terephthalate layer, an outer shielding layer and an outer protection layer in a matching way, the problem of poor explosionproof effect of an existing communication cable is solved, and the practicability of equipment is improved.

The invention provides a preparation method of seawater corrosion resisting and acid resisting type slag micro-powder and cement baking-free bricks. The preparation method comprises the following steps: putting slag micro-powder into a mixed solution and stirring; steaming the mixed solution at high temprature of 300 DEG C for 1h; filtering and taking out the slag micro-powder; mixing the slag micro-powder with cement and stirring; adding 50 percent of water and continually stirring to obtain a mixture; vibrating and molding the mixture to obtain brick blanks; curing the brick blanks at room temperature to prepare the slag micro-powder baking-free bricks. The baking-free bricks prepared by mixing the slag micro-powder and the cement have the advantages that the comprehensive performance of the baking-free bricks is improved and the aims of reducing the production cost, saving energy and reducing emission are realized; once if the preparation method is applied to large-batch production of the baking-free bricks, very good economic benefits and social benefits are brought; meanwhile, rubber powder penetrates into the micro-powder so that materials are powerfully stuck when the baking-free bricks meet water at a later period and the whole strength of the bricks is greatly improved; meanwhile, the seawater corrosion resisting performance of cement concrete can be effectively improved, so that the seawater corrosion resisting and acid resisting type slag micro-powder and cement baking-free bricks are especially applicable to seawater resisting engineering.

The invention discloses a blocking removing solution applied to blocking removal of sandstones of a water injection well and a preparation method of the blocking removing solution. The blocking removing solution is prepared from the following components in parts by weight: 30 to 50 parts of industrial hydrochloric acid (with the mass concentration of 30 percent), 0 to 15 parts of fluorosilicic acid (with the mass concentration of 40 percent), 10 to 20 parts of a multifunctional molecule inclusion agent and the balance of water; the preparation method comprises the following steps: firstly, adding the water, the industrial hydrochloric acid (with the mass concentration of 30 percent), the fluorosilicic acid (with the mass concentration of 40 percent) and the multifunctional molecule inclusion agent in sequence according to the ratio of all the components of the blocking removing solution applied to the blocking removal of the sandstones of the water injection well, uniformly mixing andcompounding to prepare the blocking removing solution. According to the blocking removing solution applied to the blocking removal of the sandstones of the water injection well and the preparation method of the blocking removing solution, disclosed by the invention, can meet the requirements of efficient corrosion of inorganic scales including calcium and magnesium scales, clay grains and the like; the blocking removing solution also has good speed slowing performance and realizes deep blocking removal.