79results about How to "Increase water injection" patented technology

The invention relates to a nano material-based water-based oil field injection agent and a preparation method thereof. The injection agent consists of 20 to 60 weight percent of diesel oil, 30 to 70 weight percent of surfactant, 1 to 10 weight percent of nano material and 1 to 20 weight percent of auxiliary agent, wherein the nano material is one or more of nano silicon dioxide, nano titanium oxide, nano magnesium oxide and nano aluminum oxide after surface modification. The preparation method thereof comprises the following steps that: firstly, weighing the diesel oil in proportion; secondly, adding the nano material in the diesel oil; thirdly, emulsifying and dispersing the mixture in an emulsifying machine; fourthly, adding the surfactant and the auxiliary agent into the emulsified and dispersed mixture; and finally, mechanically stirring to disperse the mixture at room temperature or in a water bath to obtain stock solution of the nano water-based injection agent. The injection agent can be mixed with water at any proportion to obtain homogeneous emulsified dispersion. After the emulsified dispersion is injected in the oil field through a specific process, the water injection pressure can be obviously reduced, the amount of water injection can be increased and the oil production efficiency can be improved so as to achieve the purpose of energy conservation and injection increase.

The invention relates to a coal seam water infusion device with high ground pressure, low porosity and low permeability, which comprises a static pressure water infusion device and a dynamic pressure water infusion device. The static pressure water infusion device comprises a static pressure water infusion supply pipe, a static pressure main pipeline stop valve, a first differential pressure typepenetrant continuous and quantitative adding pump, a static pressure flow divider, a static pressure branch pipeline, a static pressure branch pipeline stop valve and a static pressure flow meter. The dynamic pressure water infusion device comprises a dynamic pressure water infusion supply pipe, a water storage tank, a second differential pressure type penetrant continuous and quantitative addingpump, a water return pipe, a water infusion pump, a water quality filter, a pressure gauge, a dynamic pressure main pipeline stop valve, a dynamic pressure flow divider, a dynamic pressure branch pipeline, a dynamic pressure branch pipeline stop valve and a dynamic pressure flow meter.

The invention discloses a composite nanometer SiO<2> pressure-lowering and injection-augmenting agent and a preparation method thereof and belongs to the technical field of improvement of the crude oil recovery ratio in the oilfield waterflood recovery process in the petroleum industry. The composite nanometer SiO<2> pressure-lowering and injection-augmenting agent is composed of nanometer SiO<2>, anionic surfactant, surface modification agents and active water. The composite nanometer SiO<2> pressure-lowering and injection-augmenting agent is characterized in that good heat resistance is achieved, a good pressure-lowering and injection-augmenting effect is achieved at the temperature of 120 DEG C, the technological process is simple, operation is convenient, and meanwhile the problems of reduction of the pore diameter, blocking of a pore throat and the like caused by clay swelling and scale formation can be effectively inhibited. The composite nanometer SiO<2> pressure-lowering and injection-augmenting agent can be used for pressure-lowering and injection-augmenting of a low-permeability water injection well and can effectively supplement stratum energy, improve reservoir permeability and comprehensively improve the water injection development effect of an oil field.

The invention relates to a penetrant for coal-bed flooding. The penetrant comprises the following components by weigh percent: 0.01%-0.10% of sodium dodecyl sulfate, 0.01%-0.10% of sodium diisooctylester sulfosuccinate, 0.01%-0.10% of dodecylbetaine, 0.01%-0.10% of sodium oleoyl methyl ethanesulfonate, 0.1%-1.0% of calcium chloride and the balance of water. By using the penetrant for coal-bed flooding in the invention, the problems that a coal bed is not easily wetted and penetrated by water can be effectively solved, the efficiency of coal-bed flooding is improved, the flooding amount, wetting radius and flooding speed of the coal bed are greatly improved, the production amount of working face coal dust is effectively reduced, accident potential is eliminated, and coal mining efficiency is improved.

The invention relates to a chemical pressure-reducing injection-increasing agent for an injection well and preparation and use thereof. The chemical pressure-reducing injection-increasing agent comprises the following components in percentage by weight: 0.03 to 0.3 percent of hexadecyl trimethyl ammonium bromide surfactant, 0.05 to 0.5 percent of MY / IMC-80BHH corrosion inhibitor, 0.1 to 0.3 percent of polyamino polyether methylene phosphonae, 0.01 to 0.03 percent of polyquaternium, 0.05 to 0.1 percent of citric acid, 0.1 to 0.5 percent of hydrochloric acid and the balance of water. The total amount of the injected water is 100 percent. The pressure-reducing injection-increasing agent is used in an amount which is 0.1 to 0.3 percent based on the weight of injected water. The pressure-reducing injection-increasing agent is added into a medicine adding device in a water injection station, uniformly mixed, pumped into a high-pressure pipe by a high-pressure pump and is injected into stratum with injected water to achieve a chemical pressure-reducing injection-increasing effect. The single-well pressure drop is about 15 percent.

The invention discloses a bridge cantilever box girder construction hanging basket pre-pressing loading device, which comprises a suspended truss, a suspended truss track, a pair of outer sliding girders, an upper cross girder, a suspended truss track movable trolley, a bottom die supporting frame and a plurality of suspended barrels; water is injected into the suspended barrels respectively; the suspended truss is supported against the suspended truss track; the suspended truss track is supported against a cast bridge cantilever box girder section through a plurality of rows of track bearing girders; the bottom die supporting frame comprises a plurality of lower longitudinal girders, and a front lower cross girder and a rear lower cross girder which are fixedly connected with the front and rear ends of the lower longitudinal girders; the two ends of the bottom die supporting frame are suspended below the suspended truss respectively; and the suspended barrels in which the water is injected are suspended below the front lower cross girder. According to the device, the pressing load of the bridge cantilever box girder to be cast on the bottom die supporting frame is simulated by using the water injection suspended barrels suspended below the front lower cross girder, and sectional loading can be flexibly realized; the device is low in use cost and can be repeatedly used, the load simulation test period can be shortened greatly, and the load simulation test cost can be reduced.

The invention discloses an immovable pipe column weak acid acidizing fluid for a water injection well, and relates to the technical field of injection well acidizing fluid formulas and injection well acidizing fluid preparation methods. The immovable pipe column weak acid acidizing fluid comprises the following components in percentage by weight: 10%-30% of acid liquor, 2%-8% of stabilizing agents, 1%-5% of corrosion inhibitors, 6.5%-17% of surface active agents and the balance of distilled water. The invention also provides a preparation method of the immovable pipe column weak acid acidizing fluid for the water injection well. The immovable pipe column weak acid acidizing fluid disclosed by the invention can enlarge the acidifying blocking removal radius of the water injection well, relieve the scaling near the well bore of the water injection well, prolong the effective period of the water injection well, realize the continuous mixing acidification of an immovable pipe column and simplify the construction procedure and not influence the normal production of the water injection well by synchronously carrying out water injection and acidification.

The invention relates to a pressurized water injection device. The device comprises a small double tee, an upper flange, a large double tee, a lower flange and sleeves which are sequentially connected, wherein a hanger is arranged in the large double tee; one side of the small double tee is provided with a liquid inlet valve, while the other side is provided with a liquid outlet valve; a pressurerelief pipe is arranged on a lower part of a sealer; the pressure relief pipe is communicated with a lower inner part of the sealer; an upper part of a booster pump cylinder is connected with the hanger so that the booster pump cylinder is hung on the large double tee; the upper part of an internal pump cylinder is connected with the lower part of the hanger; a polished rod passes through the sealer; the lower part of the polished rod is connected with a pressurizing plunger which is positioned in the booster pump cylinder; the polished rod is in matched seal with the internal pump cylinder; and the upper part of the polished rod is connected with an oil pumping unit. The oil pumping unit is used for pressurizing for water injection, the pressurized water has low pulse and large fluctuation and can be used for blocking removing and dredging of a stratum layer, the penetrability of the stratum layer is improved, and the injected water amount is increased; and as the oil pumping unit iscommon equipment and has the advantages of easy management, low management difficulty, less maintenance, low labor intensity, high water injection time rate, long cycle, and obvious economic benefitsand social benefits, the oil pumping unit is used for pressurizing the injection water.

The invention provides a blocking remover for augmented injection of oilfield polymer-injected wells. The blocking remover is prepared from the following raw materials in parts by volume: a. 1.0-5.0 parts of crude oil cleaning agent, b. 0.1-1.0 part of oxidation-reduction system and c. 2.0-4.0 parts of clay stabilizer, wherein the oxidation-reduction system is prepared from an oxidant and a reducer which are in the parts-by-mass proportioning ratio of 1: (0.2-0.5); and the clay stabilizer means KCl, NH4Cl, a polyquaternary ammonium salt or a quaternary ammonium salt. According to the blocking remover, the oxidation-reduction system serves as a main agent, and a polymer-injected-converted water-flooding well blocking remover is prepared from the crude oil cleaning agent, the clay stabilizer, and the like; oxygen gas generated by the oxidant is converted into hydroxyl radicals by the oxidation-reduction system, so that no gas is generated in constructed reservoirs; and meanwhile, the system is non-corrosive, thereby being a safe, environment-friendly and high-pertinency blocking removal system.

The invention discloses a multi-hydrogen acid construction process suitable for modification of a sandstone reservoir. The multi-hydrogen acid construction process suitable for modification of the sandstone reservoir successively comprises the following steps: step one, carrying out replacing on 10-20 m<3> of a pre-treating solution or a mutual solvent under the conditions that the discharge capacity is 0.1-0.5 m<3> / min, and the pump pressure is 1-34 MPa; step two, carrying out extrusion on 10-20 m<3> of pad-acid under the conditions that the discharge capacity is 0.1-0.5 m<3> / min, and the pump pressure is 1-34 MPa; step three, carrying out extrusion on 20-50 m<3> of main body acid under the conditions that the discharge capacity is 0.1-0.5 m<3> / min, and the pump pressure is 1-34 MPa; andstep four, carrying out extrusion on 5-20 m<3> of water well displacing liquid or oil well displacing liquid under the conditions that the discharge capacity is 0.2-1 m<3> / min and the pump pressure is1-34 MPa to finish acidification modification on the sandstone reservoir under a water well or an oil well. The multi-hydrogen acid construction process suitable for modification of the sandstone reservoir is used for carrying out augmented injection on an acidized horizon, blockage of a pore throat channel of a stratum is relieved, the water injection amount is increased, water injection pressure is reduced, the oil and gas recovery efficiency is improved, and compared with a conventional acidifying process, the multi-hydrogen acid construction process suitable for modification of the sandstone reservoir is more environmentally friendly and safer, and provides a safe operation condition for human beings, equipment and environments.

The invention provides an oil displacing microemulsified acid system for acidizing plugging removal and a preparation method of the system. The oil displacing microemulsified acid system is prepared from the following components in percentage by weight: 10-35% of diesel fuel, 40-75% of acid fluid, 10-30% of alkylsulfobetaine, 1-15% of fatty amine polyoxyethylene ether phosphate, and the balance of 10% hydrochloric acid. The preparation method of the system comprises the following steps: weighing the raw materials by weight; firstly, putting acid fluid into a vessel, heating and stirring in water bath at 60 DEG C, adding alkylsulfobetaine and fatty amine polyoxyethylene ether phosphate for dissolving thoroughly, and then adding 10% ydrochloric acid; and next, adding the diesel oil and stirring for 0.5 hour, thereby obtaining the finished product. The oil displacing microemulsified acid system is a thermodynamic stable system, has excellent dissolving property to inorganic matters and organic matters, and excellent oil displacing property, and can be widely applied to the measures of a water injection well and an oil well conversion well.

The invention discloses a three-cavity cervix balloon dilatation device. The three-cavity cervix balloon dilatation device comprises a balloon set, a rubber tube, injection ports and plugs; a first end of the rubber tube is connected with the injection ports, the balloon set is arranged at a second end of the rubber tube, and a first balloon, a second balloon and a third balloon of the balloon setare arranged at the second end of the rubber tube in sequence; the rubber tube is composed of a protective outer tube and injection inner tubes, a first fixing opening, a second fixing opening and athird fixing opening are formed in the positions, located at the first balloon, the second balloon and the third balloon, of the rubber tube respectively, wherein the first fixing opening, the secondfixing opening and the third fixing opening are connected with one ends of the three injection inner tubes respectively, the other ends of the three injection inner tubes penetrate the protective outer tube and are fixedly connected with the injection ports, and needle cores are arranged on the injection ports. According to the three-cavity cervix balloon dilatation device, the capacity of cervical dilatation can be greater improved, and the device has high use value for labor induction of a full-term pregnant woman with an extremely low cervical score or labor induction of intermediate stagepregnancy.

The invention relates to pseudomonas aeruginosa YM4 CGMCC No.5243, and a culture method and application thereof. The culture method for the pseudomonas aeruginosa YM4 comprises the following steps: inoculating the pseudomonas aeruginosa YM4 into a fermentation culture medium; and cultivating in a shaking table at the temperature of 35 or 55 DEG C and at the rotating speed of 120 or 80 rpm, wherein the formula of the fermentation culture medium comprises glucose, peptone, corn paste, sodium nitrate, disodium hydrogen phosphate, potassium dihydrogen phosphate, magnesium sulfate and calcium chloride, and the pH value of the fermentation culture medium is 6.5 to 7.4. A biological surfactant generated by the pseudomonas aeruginosa YM4 can reduce oil water interface tension in the oil field; and after the action, the rheological property of the crude oil is obviously improved, viscosity is reduced, water injection pressure can be effectively reduced, water injection efficiency and recovery ratio of the crude oil can be improved; and large application prospect is achieved in the oil displacement process of the oil field.

The present invention provides a scale remover used for long-acting pressure decrease and injection increase of a water injection well, and the scale remover comprises the following components: 10-12 parts of Tween 80; 25-30 parts of 2-Phosphonobutane-1,2,4-tricarboxylic acid; 5-8 parts of dodecylbenzene sulfonic acid; 3-6 parts of an organosilicon surfactant; 2-5 parts of ethylene glycol butyl ether; 15-18 parts of n-butanol; 13-15 parts of polyamino polyether methylene phosphate and 12-14 parts of water. The scale remover has good anti swelling and swelling shrinkage capability and low surface and interface tension, and the scale remover reduces deformation work when liquid droplets pass through a narrow hole neck, reduces capillary resistance, greatly reduces the deformation work when the liquid droplets in a pore medium are pulled to spread on the surface of a rock so as to increase the moving speed of the liquid droplets in formation pores. After being injected into formation, the scale remover reduces the interfacial tension, meanwhile can restore an original water channel, reduce water injection pressure and improve water injection amount by dissolution of calcium carbonate, calcium sulfate and other precipitates near a wellbore area so as to ensure that the original water injection system is normal.

The invention belongs to the technical field of waterflooding extraction of oilfields, and particularly provides a continuous injecting and acidizing unit for a water injection well. The continuous injecting and acidizing unit for the water injection well consists of an acid liquor storage tank (1), a hydraulic double-diaphragm metering pump (2), a control system (3), an acid liquor pipeline system (4), an online monitoring system (5) and a truck moving system, wherein the acid liquor storage tank (1) is connected with the hydraulic double-diaphragm metering pump (2); an outlet of the hydraulic double-diaphragm metering pump (2) is connected with the acid liquor pipeline system (4); the control system (3) is connected with the hydraulic double-diaphragm metering pump (2); the online monitoring system (5) is connected with the acid liquor pipeline system (4); and a shared steel base of the acid liquor storage tank (1), the hydraulic double-diaphragm metering pump (2) and the control system (3) is connected with a chassis of the truck moving system. Efficient, quick and large-scale plug removal of the water injection well is implemented, water injection pressure is reduced, and water injection amount is increased.

The invention provides a bacteriostatic process for washing and coating an oilfield water injection pipeline. The process comprises the following steps of: 1) preliminarily descaling and washing the internal part of the pipeline; 2) performing primary drying treatment on the descaled and washed pipeline; 3) coating the pipeline; and 4) performing secondary drying treatment on the coated pipeline. Compared with the prior art, the process provided by the invention has the advantages that 1, the water injection rate can be effectively increased, the service life of the pipeline can be prolonged, and the device replacement cost can be reduced; 2, the propagation of iron bacteria, saprophytic bacteria TGB (Total Growth Bacteria) and sulfate reducing bacteria SRB in the water injection pipeline can be effectively controlled, and the chemical dosage for the running is reduced; 3, a device for the process is simple, the transportation is unnecessary to stop in the washing process, the pipeline is not corroded, the environment is not polluted, and the operation is convenient; and 4, seen from the site construction application situation, the internal part of the water injection pipeline measured by eyes is smooth, and the coating is uniform, and the washing quality requirement of the water injection pipeline is satisfied completely.

The invention discloses a low-permeability oil field coupling profile controlling and flooding method. The method comprises the following steps that 1, a water shutoff and profile control agent is taken to be uniformly added into carrying fluid, the addition quantity of the water shutoff and profile control agent accounts for 0.1%-0.3% of the mass of the carrying fluid, and the water shutoff and profile control agent and the carrying fluid are mixed and then stirred to be uniform to form stable suspended emulsion; 2, a well mouth of a measure well is opened, the suspended emulsion is injected into the well through a profile controlling and flooding pump truck; 3, after the injection work is finished, the well is not closed, water injection work continues to be conducted, the suspended emulsion reacts at the longitudinal deep position of a reservoir stratum under driving of succeeding water injection, and then the profile controlling and flooding and injection increasing purposes are achieved; 4, after water injection is conducted for 60 days, when the profile controlling and flooding effect is not obvious, that is to say, the water injection pressure is not decreased, or the water content of a peripheral corresponding oil well is not decreased, or the oil yield is not increased, the step 1 to the step 3 are repeatedly conducted according to the profile controlling and flooding effect and stopped until the profile controlling and flooding effect of a well group is obvious; 5, construction is finished. According to the method, water shutoff and profile control on water logging cracks are achieved, the water injection volume of the matrix reservoir stratum is increased, and the oil displacement effect of the matrix reservoir stratum is improved.

The invention discloses a coal bed screw rod water injection device and a water injection method. A lining sleeve is arranged in a housing, a rotatable water injection screw rod is arranged in the lining sleeve, a threaded cavity is formed in part, corresponding to the water injection screw rod, of the lining sleeve, the threaded cavity fits the water injection screw rod, the housing is connectedwith a water injection pipe, an expanding hole sealing rubber pipe is arranged in the outer circumference of the part, where the lining sleeve and the water injection pipe is connected, of the housing, the expanding hole sealing rubber pipe is communicated with a water supplying pipe, a one-way overflowing device is arranged on the part, located at the front end of the lining sleeve, of the housing, the one-way overflowing device is communicated with the threaded cavity, and a positioning plate used for positioning is arranged at the back of the one-way overflowing device. According to the device, sealing between water injection drilling holes is achieved by using the expanding hole sealing rubber pipe, the water injection screw rod is driven to operate by hydraulic pressure to absorb liquid, water is pushed to be stably and uniformly transferred in the axial direction to constantly exert fluctuating water pressure on coal bed gaps to increase the seepage performance and water injection amount of coal beds, the yield is high by using an expanding rubber pipe to seal the holes, the device can be taken out after water injection is completed, and therefore recycling utilization is achieved.

The invention provides a composite modifying and flooding agent. The composite modifying and flooding agent comprises 20-50 parts of a surfactant-type plugging agent, 30-70 parts of a decompression and augmented injection agent and 5-20 parts of a particle blocking agent. The surfactant-type plugging agent is prepared from polyacrylamide, water, a composite crosslinking agent, modified cyclodextrin, m-phenylenediamine, an oxygen scavenger and a carboxylate dimeric surfactant according to a weight ratio of 1: (110-131): (0.05-0.12): (0.2-0.8): (0.1-0.3): (0.05-0.2): (0.3-1). The surfactant-typeplugging agent, the decompression and augmented injection agent and the particle blocking agent are coupling and flooding key materials. Through the combination of a water shut-off and profile control technology and a decompression and augmented injection technology, the water shut-off and profile control, decompression and augmented injection, and oil displacement are effectively unified.

The invention discloses a washing machine water injection control method and a washing machine. According to the washing machine water injection control method, after a washing program starts to run, in response to the requirement of a user, the execution of the washing program can be interrupted at any time, and the next time of water injection is completed. According to the washing machine water injection control method, the requirement of the user can be met that after the washing program starts, that is, the washing machine completes the water injection, water is injected into the washing machine again for a certain time to automatically flush detergent added again into the inner drum, or the water injecting amount is increased to obtain a better clothes washing effect, the flexibility is good, and the experience effect of the user is promoted.

The invention provides a barium sulfate and strontium sulfate scale inhibitor, a preparation method and application thereof. In terms of a total weight of 100%, the scale inhibitor is prepared from the following raw materials by weight percentage: 10%-15% of a chelating agent; 1%-2% of an initiator; 3%-5% of phosphorous acid; 5%-10% of acrylic acid; 1%-2% of a regulator; 1%-2% of formaldehyde; 2%-4% of a surfactant; and the balance water. The scale inhibitor provided by the invention has stable performance and long service life, can be preserved and used for a long term, can effectively prevent shafts, surface pipelines and equipment from scaling, especially has good scale inhibition ability on calcium sulfate, barium sulfate, strontium sulfate, etc., and can ensure pressure-controlled water injection.

The invention discloses a heavy oil extraction system and method. The system includes a pipe column device, a water-injection regulating valve and a temperature controller. The pipe column device includes a sieve tube arranged in a horizontal well section, a water injection pipe, a short pipe and a temperature test tube, wherein the water injection pipe, the short pipe and the temperature test tube are arranged in the sieve tube; a sieve hole is formed in the sieve tube, and the temperature test tube is internally provided with several thermoelectric pairs used for monitoring the temperature of the horizontal well section; the water-injection regulating valve is arranged on the ground and used for adjusting the water injection amount of the water injection pipe; a temperature controller isarranged on the ground and connected with the thermoelectric pairs, and when the temperature of the horizontal well section is not in a preset temperature range, the temperature controller controls the regulating degree of the water-injection regulating valve to adjust the water injection amount of the water injection pipe, so that the temperature is in the preset temperature range. According tothe technical scheme, in the fireflooding combustion process, combustion is stably controlled, and the problems that in the horizontal-well fireflooding process, gas channeling causes burning of firewires and oxygen runs out from the horizontal well are prevented.

The invention discloses a nanometer poly-silicon emulsion. The nanometer poly-silicon emulsion is prepared from 40-50 parts of hydrophobic nanosilicon dioxide, 10-15 parts of a sodium hydroxide aqueous solution, 10-15 parts of fatty alcohol-polyoxyethylene ether AEO-9, 8-10 parts of sodium alpha-olefin sulfonate and 5-10 parts of cocoalkanoylamido propyl betaine in 300-500 parts of deionized water. According to the formula proportion, part of the deionized water, fatty alcohol-polyoxyethylene ether AEO-9, sodium alpha-olefin sulfonate and cocoalkanoylamido propyl betaine are taken and uniformly mixed to be heated and stirred until a solution is clarified, cooling is conducted, the hydrophobic nanosilicon dioxide and the sodium hydroxide aqueous solution are added, the PH value is controlled to 8-10, the remaining part of deionized water is added, heating is conducted until the materials are boiled, turbid and then clarified, and then the nanometer poly-silicon emulsion is obtained. According to the nanometer poly-silicon emulsion, secondary pollution can be reduced, and the problems are effectively solved that in the later development period, the water injection pressure is high, the water injection amount does not meet the injection allocation requirement, and the injection increase validity period is short.

The invention discloses a dense single-layer sectional treatment method and a treatment device for a high-pressure under-injection well. The treatment device comprises a construction pipe column and two packers arranged at the lower end of the construction pipe column, and a ball valve is arranged at the lower end of the pipe column; in the treatment process, an oil layer is divided into a plurality of sections, and unblocking is conducted section by section from bottom to top through unblocking liquid; firstly, prepad fluid and the unblocking fluid are injected through the ball valve to unblock the oil layer section on the lowermost layer, then an annulus area of a sleeve corresponding to each oil layer section on the upper layer is repeatedly sealed through two packers, and the unblocking fluid is injected through a pressure valve to unblock the oil layer section until unblocking of each oil layer section is completed. According to the method, the unblocking liquid can be prevented from locally flowing and locally treating, it is ensured that the oil layer is sufficiently treated in the longitudinal and transverse directions, blockage can be removed effectively, the measure effect can be prolonged for a long time after treatment by the method, the water injection profile can be effectively improved, and the water flooding efficiency can be improved.

The invention discloses an acid-free neutral chelation blocking remover for an oil field. The blocking remover comprises, by weight, 6-9 parts of ricinoleic acid, 100-107 parts of a lithium-ion-dopingpolymer emulsion, 0.4-1 part of dichlord isocyanurice acid, 1-2 parts of a penetrating agent, 2-3 parts of 1-N-ethoxy-2-alkyl-imidazoline-ammonium-salt and 0.8-2 parts of a chelating agent. The blocking remover has low corrosivity, no waste acid is discharged in the blocking removal technology, and the blocking remover accords with the clean production principle.

The invention discloses a single main pipe single well water distribution system applied to an oil exploitation field. The system mainly comprises a water injection station (2) connected with a water supply (1), a water injection main line (3) connected with the water injection station (2), and a water injection well (4) connected with the water injection main line (3). The invention further discloses a water distribution process based on the single main pipe single well water distribution system. According to the system, each well is provided with a water distribution chamber, and management is dispersed. But water injection branch pipes are short and are small in total quantity, so stratification testing is benefited, total investment can also be saved. The single main pipe single well water distribution system is suitable for an oil field which is multiple in the number of wells, adopts determinant to carry out well distribution, and is large in water injection quantity and area.

The invention relates to a fluid dynamic annular space cavitation device. The fluid dynamic annular space cavitation device comprises a cylindrical shell body, a spherical dynamic body, a stop plate and a bracket; the cylindrical shell body is internally provided with a working area, and the spherical dynamic body is disposed in the working area in the cylindrical shell body; a channel for fluid flowing is formed between the outer wall of the spherical dynamic body and the inner wall of the cylindrical shell body, and fluid flowing through the channel is subjected to cavitation; the stop plateis disposed on the top of the cylindrical shell body and used for preventing the spherical dynamic body from escaping from the upper part of the cylindrical shell body, so that the spherical dynamicbody is operated within the working area in the cylindrical shell body; and the bracket is disposed at the inner bottom of the cylindrical shell body for preventing the spherical dynamic body from coming out of the lower portion of the cylindrical shell body. The fluid dynamic annular space cavitation device has the beneficial effects of small volume, wide application range and safety and reliability.

The invention discloses an industrial glass fiber reinforced plastic cooling tower. The industrial glass fiber reinforced plastic cooling tower comprises a tower body, water absorption cotton threads,glass fiber reinforced plastic water baffles, a water spray pipe, spray nozzles and an induced draft fan body, wherein the induced draft fan body is fixed at the top end of the interior of the towerbody, the glass fiber reinforced plastic water baffles are arranged below the induced draft fan body, an embedding module is arranged below a heat dissipation packing layer, and air inlet pipes are arranged in the embedding module. The situations that small particles in air enter water along with the air and reach water spraying holes in the circulation process to result in blockage of the water spraying holes, consequently, a circulation system goes wrong, the cooling efficiency is reduced, water pipe holes are even broken due to blockage of the large amount of water spraying holes, and thenhot water is sprayed and brings threats to other people are avoided; the air inlet pipes can be adjusted up and down, the water injection amount can be increased, and the situation that water coolingis not timely and consequently the cooling tower is full of hot water and the cooling efficiency is reduced and a machine needing to be cooled is damaged to result in economic loss is avoided.

The invention discloses a blocking removal construction process for removing barium strontium calcium compound scale pollution. The process includes the steps: scale removal and blocking removal reverse replacement; clear water reverse replacement; soaking and dissolving; clear water positive extruding; scale removal and blocking removal liquid positive extruding; clear water reverse extruding. According to the process, blocking of near-well-bore areas is removed, pollution caused by inorganic scales such as barium sulfate, strontium sulfate and calcium sulfate with difficultly-dissolved acidis effectively removed by the aid of a non-acid blocking removal liquid system, oil and gas recovery efficiency is improved, blocking of formation pore throat channels can be effectively removed, water injection rate is increased, water injection pressure is reduced, and a foundation is laid for subsequent improvement of oil and gas recovery efficiency.