33results about How to "Reduce the draining speed" patented technology

The invention relates to a fluorocarbon surfactant binary composite foam flooding system. The system is prepared by adopting fluorocarbon surfactant as a foaming agent, adopting a macromolecular compound as a foam stabilizer and adding water; the foaming agent is one or combination of sulphobetaine type fluorocarbon surfactant and amine oxide type fluorocarbon surfactant, or combination of alpha-alkenyl sulfonate and one of sulphobetaine type fluorocarbon surfactant and amine oxide type fluorocarbon surfactant; and the foam stabilizer is partially hydrolyzed polyacrylamide, polyvinyl pyrrolidone K30, polyvinyl pyrrolidone K90 or hydroxyethyl cellulose. An application method comprises that solution of the fluorocarbon surfactant binary composite foam flooding system and nitrogen are alternately injected into a stratum or a rock center so as to improve the recovery rate of crude oil.

The invention relates to gel-foam selective plugging agent and the application thereof, belonging to the technical field of oilfield chemistry. The plugging agent comprises the components: 30-50% of acrylamide, 20-40% of hexamethylenetetramine, 5-15% of phenol, 5-15% of tetraethylene pentamine and 5-15% of foaming agent. The aqueous solution with the mass ratio of 0.5-2% can be prepared in site and is injected into a well after being evenly dissolved, so that the plugging agent is used for plugging water in the oil well at the temperature of 90-150 DEG C. The plugging agent uses organic cross linker for cross bonding polymer to form gel foam under the condition of high temperature, so as to be resistant to the high temperature of 90-150 DEG C and have long period of validity in plugging water.

The invention relates to a three-phase foam complex oil flooding system and application thereof. The three-phase foam complex oil flooding system consists of a foaming agent, a foam stabilizer, water and gas, wherein the foaming agent and the foam stabilizer are uniformly dispersed into the water to form an oil flooding system solution; the proportion of components is as follows: the foam stabilizer is 0.1-0.3% in percentage by mass, and the foaming agent is 0.1-0.4% in percentage by mass; the gas is nitrogen, carbon dioxide or natural gas; the volume ratio between the oil flooding system solution and the gas is 1:(1-1.5), and the oil flooding system solution and the gas are alternately injected into the stratum or rock cores. The three-phase foam complex oil flooding system disclosed by the invention can be used for reducing the liquid discharge speed of a liquid membrane, increasing the viscoelasticity and strength of the liquid membrane, and ensuring that the foam is more stable, has good oil flooding effects, and can be used for enhancing the oil recovery.

The invention relates to a self gas generation foam-gel profile control agent prepared from oilfield reinjection water and a preparation method and an application of the agent. The self gas generation foam-gel profile control agent is prepared from the following components: 0.1-0.3% of polyacrylamide, 0.1-0.3% of a cross-linking agent, 2.0% of NH4Cl, 1.6% of NaNO2, 0.05-0.15% of a catalyst, 0.2-0.5% of a foaming agent, 1-5% of a stabilizing agent and the balance of oilfield reinjection water. The preparation method comprises the steps of dissolving polyacrylamide by using oilfield reinjection water firstly, and secondly adding other components to be uniformly dissolved. The self gas generation foam-gel profile control agent is used for profile control on oilfield reinjection water, and can be also applied to increase production through fracturing, acidification and fuel scavenge; the foam-gel profile control agent is good in salt resistance, the liquid can be prepared by using oilfield reinjection water with high-salinity temperature, the water resource is saved, and the oil-water pollution is reduced; the agent is not cross-linked with being placed at high temperature for a long time, so that construction security is ensured; after the agent is filled into a stratum, foam and gel cross-linking is formed simultaneously, and the foams are uniformly dispersed in the gel with high strength.

The invention provides a foam foaming agent for cement and a preparation method of the foam foaming agent. The foaming agent is prepared from a foaming main material, a surface active agent, a foam stabilizer, a chelating agent, an organic solvent and water, wherein the foaming main material is lauryl sodium sulfate; the surface active agent is selected from one or more of alpha-sodium olefinsulfonate, laurinol polyoxyethylene ether sodium sulfate or lauramidopropylamine oxide; the foam stabilizer is silicon resin polyether. The foaming agent solves the problem that a traditional foaming agentis poor in performance and instable.

The invention provides a filtering basket type ultrasonic extraction device for biological effective components, which relates to an extraction device for biological effective components. The invention solves the problems that incomplete filtration of an extract and slow discharge speed of the extract exist in the traditional intermittent type ultrasonic extraction device and a solid material blocks a liquid outlet. In the invention, a filtering basket is connected with an electric lifter by a suspension rope and installed in a liquid storage tank, an annular gas spray head is installed in the filtering basket, at least two ultrasonic vibration boxes are annularly arrayed on the outer wall of the filtering basket, a gas passing pipe is installed on the inner wall of the filtering basket, a liquid discharge pipe is installed on the lower end face of the liquid storage tank, and at least two of the ultrasonic vibration boxes are respectively connected with a control box outside the liquid storage tank by a wire cable. The invention realizes that the extract does not need to be filtered again, and avoids that slag is deposited at the bottom of the liquid storage tank so as to slow up liquid discharge speed and even block the liquid outlet; by the split design of the liquid storage tank and the filtering basket, the invention discharges liquid quickly and is convenient to disassemble and wash the extraction device.

The invention discloses a composite foam stabilizer and a preparation method thereof. The composite foam stabilizer comprises lauryl alcohol, ethylene glycol monobutyl ether, triethanolamine, nano silicon, hydroxyethyl cellulose, special stearate, thickening agent and water. By adopting the technical scheme, the invention can greatly prolong the stable time of the foam, reduce the bleeding quantity, and enhance the strength and waterproof quality of the finished product on the premise of not lowering the foaming coefficient of the original foaming agent.

The invention provides a temperature-resistant and salt-resistant viscoelastic surfactant, and a preparation method and an application thereof. The specific structural formula of the temperature-resistant and salt-resistant viscoelastic surfactant is shown, the preparation method of the temperature-resistant and salt-resistant viscoelastic surfactant, and the application of the temperature-resistant and salt-resistant viscoelastic surfactant in a foam fracturing fluid are provided. The temperature-resistant and salt-resistant viscoelastic surfactant disclosed by the invention has both a cationic group and an anionic group, can weaken the influence of counter ions on the area of a hydrophilic head group, reduces the utilization of freshwater resources, and effectively solves the problems ofpoor temperature resistance, poor salt resistance, insufficient fresh water resources, reservoir damage and the like.

The invention discloses a medium-high temperature strong plugging hard rubber recyclable foam drilling fluid and a preparation method thereof. A low-molecular-weight high-temperature-resistant foam stabilizer, a wetting agent and a bubble film density lightening agent are added into clear water to form a temperature-resistant hard rubber base solution. Sodium bentonite, an alkaline regulator, a sulfonate polymer filtrate reducer, a foaming agent, a temperature-resistant resin filtrate reducer and a foam surface viscosity regulator are added into the temperature-resistant hard rubber base solution to form the medium-high temperature hard rubber recyclable micro-foam drilling fluid or completion fluid. A low-density blocking agent is added and stirred to form the medium-high temperature strong plugging hard rubber micro-foam drilling fluid or completion fluid. The medium-high-temperature strong plugging recyclable foam fluid is low in solid phase content, strong in membrane structure and excellent in foam stabilizing effect before and after medium-high temperature; and the recyclable times and the plugging effect of the completion fluid after the micro-foam drilling fluid can be improved, the loss of the drilling fluid is reduced, the safe and high-effect recyclable micro-foam drilling and completion fluid can be used for exploiting medium-high-temperature and low-pressure easily-leaking oil and gas resources, geothermal wells and the like, and the deep well drilling requirement is met.

The invention relates to a self gas generation foam-gel profile control agent prepared from oilfield reinjection water and a preparation method and an application of the agent. The self gas generation foam-gel profile control agent is prepared from the following components: 0.1-0.3% of polyacrylamide, 0.1-0.3% of a cross-linking agent, 2.0% of NH4Cl, 1.6% of NaNO2, 0.05-0.15% of a catalyst, 0.2-0.5% of a foaming agent, 1-5% of a stabilizing agent and the balance of oilfield reinjection water. The preparation method comprises the steps of dissolving polyacrylamide by using oilfield reinjection water firstly, and secondly adding other components to be uniformly dissolved. The self gas generation foam-gel profile control agent is used for profile control on oilfield reinjection water, and can be also applied to increase production through fracturing, acidification and fuel scavenge; the foam-gel profile control agent is good in salt resistance, the liquid can be prepared by using oilfield reinjection water with high-salinity temperature, the water resource is saved, and the oil-water pollution is reduced; the agent is not cross-linked with being placed at high temperature for a long time, so that construction security is ensured; after the agent is filled into a stratum, foam and gel cross-linking is formed simultaneously, and the foams are uniformly dispersed in the gel with high strength.

The invention relates to a novel bubbling foam stabilizer and a preparation method thereof. The molecular formula of the novel bubbling foam stabilizer is as shown in a formula (I). The preparation method of the novel bubbling foam stabilizer comprises the following steps: performing a reaction on isododecanol and epoxy ether under the action of a catalyst BF3-aether solution; and then performing a reaction with chlorosulfonic acid and sodium hydroxide to generate the bubbling foam stabilizer. The surfactant bubbling foam stabilizer provided by the invention has the advantages of novel structure and excellent performance. A small amount of the bubbling foam stabilizer can generate a lot of foam, and the half life of foam can reach over 3 times of that of a conventional bubbling agent. A single bubbling foam stabilizer can achieve a compound effect of various bubbling agents, and the adding amount is smaller, thereby providing a novel method for researching a high-performance foam drilling fluid.

The invention relates to a cement composition, a foamed cement slurry, a foamed concrete pouring material and a preparation method thereof, belonging to the technical field of foamed concrete. The cement composition of the invention comprises the following components in parts by weight: 100 parts by weight of Portland cement, 0.5 to 3 parts by weight of foaming agent, 0.2 to 2 parts by weight of thixotropic agent, 0.5 to 2 parts by weight of viscosifier and 3 to 5 parts by weight of early strength agent. By adding thixotropic agent, viscosifier and early strength agent, the thixotropy, viscosity and setting time of the foamed concrete can be changed, the mixing pulping process is beneficial to the foaming agent to foam and can ensure the stability of the foaming which is not easy to crack,thereby avoiding the problem of collapse mode of the foamed concrete pouring material adopting the Portland cement and making the foamed concrete have lower dry density.

The invention relates to the technical field of preparation of foaming agents used for oil recovery in an oil reservoir, and in particular relates to a preparation method for a temperature-resistant salt-tolerant oil-displacing foaming agent. According to the method provided by the invention, firstly a reaction is performed to obtain a linear alkyl benzene sulfonate, the linear alkyl benzene sulfonate is compounded with alkyl diphenyl ether sodium disulfonate and polyacrylamide to obtain a novel substance, so that thermal stability is enhanced, and the temperature resistance and salt toleranceof the oil-displacing foaming agent are improved; a hydrogen bond is easily formed in polyacrylamide, so that the mineralization resistance and salt tolerance of the substance are improved; a titanate coupling agent is used to modify quartz sand powder, and the modified quartz sand powder, yeast powder and white sugar are subjected to fermentation together, so that the temperature resistance of the alkyl benzene sulfonate is enhanced at the high temperature, and the temperature resistance of the oil-displacing foaming agent is improved; and a polyether, a sodium carbonate solution and a sulfonated castor oil foam stabilizer are added, so that the salt tolerance of the foaming agent can be enhanced, the stability of foam is improved, the temperature resistance and salt tolerance of the oil-displacing foaming agent are further improved, and the oil-displacing foaming agent has broad application prospects.

The invention discloses a compound type foaming agent and relates to an additive for a building, in particular to a foaming agent added into concrete. The compound type foaming agent is prepared fromthe following components in percentage by weight: 69-79% of an primary product, 20-30% of N,N'-dinitrosopentamethylamine (DPT), 0.2-0.4% of diglycol and 0.4-0.6% of lauryl alcohol. The compound type foaming agent is prepared on the basis of the original foaming agent, substances with excellent foaming properties are added into the foaming agent, and other additives are added to achieve the effectsof increasing foams, stabilizing foams and regulating. The compound type foaming agent prepared by the method is verified in practical production, and has the outstanding characteristics of being great in foaming amount, small in foam loss, little in strength effect and the like.

The invention discloses a preparation method for a compound type foaming agent, relates to a preparation method for an additive for a building, in particular to a preparation method for a foaming agent added into concrete. The compound type foaming agent is compounded from an initial product, N,N'-dinitrosopentamethylamine (DPT), diglycol and lauryl alcohol. The compound type foaming agent is prepared on the basis of the original foaming agent, substances with excellent foaming properties are added into the foaming agent, and other additives are added to achieve the effects of increasing foams, stabilizing foams and regulating. The compound type foaming agent prepared by the preparation method is verified in practical production, and has the outstanding characteristics of being great in foaming amount, small in foam loss, small in strength effect and the like. The preparation method is simple to operate, is easy to control and is relatively high in yield.

The invention discloses needle-like amino acid crystal cleansing gel and a preparation method thereof, and belongs to the field of daily chemical products. The cleansing gel is prepared from the following components: a phase A component comprising water, EDTA disodium and glycerol; and a phase B component comprising cocamidopropyl betaine, potassium cocoyl glycinate, disodium lauryl sulfosuccinate, decyl glucoside, glyceryl oleate, sodium methyl cocoyl taurate, quaternary ammonium salt-80, sodium isostearoyl lactylate, plant amino acids, methylparaben, N-lauroyl-N-sodium methyl taurate, dodecyl trimethyl ammonium chloride and dodecyl dimethyl betaine. Electrostatic attraction exists between the N-lauroyl-N-sodium methyl taurate and the dodecyl trimethyl ammonium chloride and the dodecyl dimethyl betaine, so that the effect of synergistically improving the foam stability is achieved.

The invention provides a filtering basket type ultrasonic extraction device for biological effective components, which relates to an extraction device for biological effective components. The invention solves the problems that incomplete filtration of an extract and slow discharge speed of the extract exist in the traditional intermittent type ultrasonic extraction device and a solid material blocks a liquid outlet. In the invention, a filtering basket is connected with an electric lifter by a suspension rope and installed in a liquid storage tank, an annular gas spray head is installed in the filtering basket, at least two ultrasonic vibration boxes are annularly arrayed on the outer wall of the filtering basket, a gas passing pipe is installed on the inner wall of the filtering basket, a liquid discharge pipe is installed on the lower end face of the liquid storage tank, and at least two of the ultrasonic vibration boxes are respectively connected with a control box outside the liquid storage tank by a wire cable. The invention realizes that the extract does not need to be filtered again, and avoids that slag is deposited at the bottom of the liquid storage tank so as to slow upliquid discharge speed and even block the liquid outlet; by the split design of the liquid storage tank and the filtering basket, the invention discharges liquid quickly and is convenient to disassemble and wash the extraction device.

The invention discloses a high-temperature hard rubber recyclable foam drilling fluid and a preparation method thereof. 0.2~0.8 parts of low molecular weight anti-high temperature foam stabilizer, 1~2 parts of bubble film density reducing agent and 0.1~0.2 parts of high temperature wetting agent are pre-prepared into high temperature resistant hard rubber base liquid in clear water, and then the temperature resistant sodium bentonite is mixed. 0~3 parts of alkaline regulator, 0.3~0.5 parts of high temperature foaming agent, 0.1~0.5 parts of high temperature and salt resistant fluid loss reducer and 1~3 parts of high temperature resin fluid loss reducer and mixed evenly. Add it into the high temperature resistant base liquid while stirring, and stir it with a low-speed strong stirrer for 5 to 7 hours. The invention has low solid phase content, strong membrane structure, excellent foam stabilization effect under high temperature environment, improves the recirculation times of the completion fluid after the micro-foam drilling fluid and the loss-stopping effect under high temperature and high pressure, and makes the recirculatable micro-foam drilling and completion fluid safe. It is efficiently used in the exploitation of medium, high temperature and low pressure oil and gas resources, geothermal wells or salt gypsum layers, etc., to meet the drilling needs of deep and ultra-deep wells.

The invention relates to a novel bubbling foam stabilizer and a preparation method thereof. The molecular formula of the novel bubbling foam stabilizer is as shown in a formula (I). The preparation method of the novel bubbling foam stabilizer comprises the following steps: performing a reaction on isododecanol and epoxy ether under the action of a catalyst BF3-aether solution; and then performing a reaction with chlorosulfonic acid and sodium hydroxide to generate the bubbling foam stabilizer. The surfactant bubbling foam stabilizer provided by the invention has the advantages of novel structure and excellent performance. A small amount of the bubbling foam stabilizer can generate a lot of foam, and the half life of foam can reach over 3 times of that of a conventional bubbling agent. A single bubbling foam stabilizer can achieve a compound effect of various bubbling agents, and the adding amount is smaller, thereby providing a novel method for researching a high-performance foam drilling fluid.

The invention discloses a modified phenolic insulation board with nitrogen as a foaming agent and belongs to the technical field of energy conservation materials in buildings. The modified phenolic insulation board is prepared from, by weight, 55-85 parts of thermosetting phenolic resin, 25-40 parts of nitrogen, 5-25 parts of fumed silica, 15-30 parts of a curing agent, 2-8 parts of a foam stabilizer and 2-10 parts of a toughening modifier. The thermosetting phenolic resin, the fumed silica, the foam stabilizer and the toughening modifier are proportionally mixed and fed into a stirring system, and nitrogen pressure is regulated to be from 0.6Mpa to 0.8Mpa; a chain board in the stirring system is controlled to be from 65DEG C to 75DEG C, the foaming process is gradually completed on a foaming material with stirring and feeding of the nitrogen, and the foaming material is cured into the phenolic-foaming insulation board. The nitrogen is taken as the foaming agent, a uniform physical barrier is provided for foaming, and thermal conductivity of the phenolic-foaming insulation board is lowered; fire-retardant safety is improved, and production cost is reduced.

The invention discloses compound cake emulsifying paste and a preparation method thereof. The compound cake emulsifying paste comprises the following raw materials of glycerol laurate, glycerol arachidonate, methyl cellulose, hydroxypropyl methyl cellulose, a d-sorbitol solution, propylene glycol and deionized water. According to the compound cake emulsifying paste, the stability of a cake slurryfoam system can be improved; a finished cake prepared from the compound cake emulsifying paste is high in bulkiness, good in softness and high in nutrition; and the problems that existing cake emulsifying paste needs to be used in cooperation with an improver, the cake quality is poor, the production cost is high, and the cake emulsifying paste is not easily digested and absorbed by human bodies are solved. The preparation method of the compound cake emulsifying paste is simple, the production is convenient, and an emulsifying agent in the prepared compound cake emulsifying paste has good combinability with oil drops and bubbles in the foam system, so that the stability of the foam system is further improved.

The invention discloses a concrete air entraining agent and a preparation method thereof and belongs to the field of concrete additives. According to the concrete air entraining agent, erucylamide, hydrochloric acid and the like are used as raw materials to synthesize a long-carbon-chain cationic surfactant to reduce the surface tension; then isopropanol is used as a solvent to react, and gas generated in a hydration process can be uniformly squeezed and entrained, so that the compactness is improved; polyaspartic acid is modified through fumaric acid and carboxylic acid and amide groups are introduced so that the air entraining efficiency is improved; and polyethylene vinyl acetate and polyvinyl versatate are added and can form a film when meeting water, so that the bending strength and permeability resistance of mortar are improved and the whole performance in an concrete air entraining process is improved. According to the concrete air entraining agent, foam is formed through the surfactant to close pores, so that the compactness and the water resisting performance are improved. By adopting the concrete air entraining agent, the problems of a current concrete air entraining agent that the foam stability is poor and the influence on the hardening strength of concrete is great are solved.

The invention discloses a medium-high temperature hard rubber recyclable foam drilling fluid and a preparation method thereof. Add low molecular weight anti-high temperature foam stabilizer to clear water. After dispersing and dissolving, add wetting agent and foam film density reducing agent successively. Stir well and let stand to ensure full swelling to form a temperature resistant hard base liquid. Accurately weigh the sodium bentonite, alkaline regulator, sulfonate polymer fluid loss reducer, foaming agent, temperature-resistant resin fluid loss reducer and foam surface viscosity regulator, mix them evenly, and add the temperature-resistant hard gum base while stirring. medium and high temperature hard rubber can be circulated in micro-foam drilling fluid or completion fluid. The medium and high temperature recyclable foam fluid of the invention has low solid phase content, strong membrane structure and excellent foam stabilization effect, and can resist saturated NaCl and 25% CaCl 2 , to increase the recirculation times of the completion fluid after the micro-foam drilling fluid, so that the recyclable micro-foam drilling and completion fluid can be safely and efficiently used in the exploitation of medium, high temperature and low pressure leaky oil and gas resources and geothermal wells.

The invention relates to a three-phase foam complex oil flooding system and application thereof. The three-phase foam complex oil flooding system consists of a foaming agent, a foam stabilizer, water and gas, wherein the foaming agent and the foam stabilizer are uniformly dispersed into the water to form an oil flooding system solution; the proportion of components is as follows: the foam stabilizer is 0.1-0.3% in percentage by mass, and the foaming agent is 0.1-0.4% in percentage by mass; the gas is nitrogen, carbon dioxide or natural gas; the volume ratio between the oil flooding system solution and the gas is 1:(1-1.5), and the oil flooding system solution and the gas are alternately injected into the stratum or rock cores. The three-phase foam complex oil flooding system disclosed by the invention can be used for reducing the liquid discharge speed of a liquid membrane, increasing the viscoelasticity and strength of the liquid membrane, and ensuring that the foam is more stable, has good oil flooding effects, and can be used for enhancing the oil recovery.

The invention discloses a foam well washing fluid and a preparation method thereof. The well flushing fluid includes the following components in weight percent: 0.1% to 0.5% of bactericide, 0.01% to 0.05% of ion stabilizer, 0.1% to 0.3% of foaming agent, 0.1% to 0.3% of thickener, and 0.02% of crosslinking agent %~0.045%, and the balance is oilfield sewage. The foam well-washing fluid prepared by using oilfield sewage in the present invention has excellent foaming performance and foam-stabilizing performance, meets the requirements of on-site construction, not only alleviates the demand for clean water resources in oilfield well-washing operations, but also solves the problem of oilfield produced formation water treatment; At the same time, it has low density, strong sand-carrying performance, good filtration loss reduction effect, and high well washing efficiency, which can reduce formation damage to low-pressure oil and gas wells; has good economic and environmental benefits, and is suitable for popularization in oil field low-pressure oil and gas well washing operations. application.

The invention discloses a high-temperature ebonite recyclable foam drilling fluid and a preparation method thereof. The preparation method comprises the following steps: pre-preparing a high-temperature-resistant ebonite base solution from 0.2-0.8 part of a low-molecular-weight high-temperature-resistant foam stabilizer, 1-2 parts of a bubble film density lightening agent and 0.1-0.2 part of a high-temperature wetting agent in clear water; and uniformly mixing 0-3 parts of temperature-resistant sodium bentonite, 0-0.1 part of an alkaline regulator, 0.3-0.5 part of a high-temperature foaming agent, 0.1-0.5 part of a high-temperature-resistant salt-resistant filtrate reducer and 1-3 parts of a high-temperature-resistant resin filtrate reducer, adding the mixture into the high-temperature-resistant base solution while stirring, and conducting stirring for 5-7 hours by using a low-speed strong stirrer. The solid phase content is low, and the membrane structure is strong; and the foam stabilizing effect is excellent in a high-temperature environment, the cycle index of the completion fluid after the micro-foam drilling fluid is increased, the leaking stoppage effect under high temperature and high pressure is improved, the safe and high effect of the recyclable micro-foam drilling and completion fluid is used for exploiting medium-high-temperature low-pressure easily-leaking oil and gas resources, geothermal wells or salt-gypsum layers and the like, and the drilling requirements of deep wells and ultra-deep wells are met.

The invention discloses a needle-shaped amino acid crystal cleansing gel and a preparation method thereof, belonging to the field of daily chemical products. The cleansing gel comprises the following components: Phase A component: water, disodium EDTA, glycerin; Phase B component: cocamidopropyl betaine, potassium cocoyl glycinate, disodium lauryl sulfosuccinate , Decyl Glucoside, Glyceryl Oleate, Sodium Methyl Cocoyl Taurate, Quaternium-80, Sodium Isostearyl Lactyl Lactylate, Vegetable Amino Acids, Methylparaben, N-Lauroyl-N ‑Sodium Methyl Taurate, Lauryl Trimethyl Ammonium Chloride, Lauryl Dimethyl Betaine. There is electrostatic attraction between N-lauroyl-N-methyl sodium taurate in the present invention and dodecyltrimethylammonium chloride and dodecyldimethyl betaine, thereby synergistically improving foam stability Sexuality.

The invention discloses a medium-high temperature strong plugging hard rubber recyclable foam drilling fluid and a preparation method thereof. Add low molecular weight anti-high temperature foam stabilizer, wetting agent and foam film density reducing agent to water to form temperature resistant hard base liquid. Add sodium bentonite, alkaline regulator, sulfonate polymer fluid loss reducer, foaming agent, temperature resistant resin fluid loss reducer and foam surface viscosity modifier into the temperature resistant hard gum base liquid to form medium and high temperature hard gum Circulating microfoam drilling fluid or completion fluid. Add low-density plugging agent and stir to form medium and high temperature strong plugging hard rubber micro-foam drilling fluid or completion fluid. The medium and high temperature strong plugging recyclable foam fluid of the invention has low solid phase content, strong membrane structure, and excellent foam stabilization effect before and after medium and high temperature; it can improve the circulation times of the completion fluid after the micro-foam drilling fluid and the effect of plugging, and reduce the loss of drilling fluid , so that the recyclable micro-foam drilling and completion fluid can be safely and efficiently applied to the exploitation of medium, high temperature and low pressure oil and gas resources, geothermal wells, etc., which are easy to leak, and meet the needs of deep well drilling.