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CN115404117A - Isolation working fluid and preparation method thereof - Google Patents

Isolation working fluid and preparation method thereof Download PDF

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Publication number
CN115404117A
CN115404117A CN202110578707.0A CN202110578707A CN115404117A CN 115404117 A CN115404117 A CN 115404117A CN 202110578707 A CN202110578707 A CN 202110578707A CN 115404117 A CN115404117 A CN 115404117A
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China
Prior art keywords
temperature range
emulsion
isolation
preset temperature
parts
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CN202110578707.0A
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Chinese (zh)
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CN115404117B (en
Inventor
刘美红
田爱民
邹涛
陈佩磊
王厚兵
许杰
何世浩
段卫英
高创礼
邢跃
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Petrochina Co Ltd
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Petrochina Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • C10M169/041—Mixtures of base-materials and additives the additives being macromolecular compounds only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an alcohol or ester thereof; bound to an aldehyde, ketonic, ether, ketal or acetal radical
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/06—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an acyloxy radical of saturated carboxylic or carbonic acid
    • C10M2209/062—Vinyl esters of saturated carboxylic or carbonic acids, e.g. vinyl acetate
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
    • C10M2227/02—Esters of silicic acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
    • C10M2227/02—Esters of silicic acids
    • C10M2227/025—Esters of silicic acids used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/041—Siloxanes with specific structure containing aliphatic substituents
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/02—Pour-point; Viscosity index
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/08—Resistance to extreme temperature
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/72—Extended drain
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/16—Dielectric; Insulating oil or insulators
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/01—Emulsions, colloids, or micelles
    • C10N2050/011—Oil-in-water

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Colloid Chemistry (AREA)

Abstract

The application provides an isolation working solution and a preparation method thereof, and belongs to the technical field of petrochemical industry. The preparation method of the isolation working solution comprises the following steps: mixing polyvinyl acetate emulsion, ethyl silicate, methyl silicone oil and an emulsion stabilizer, and stirring for a first preset time within a first preset temperature range to obtain a mixed solution; cooling the mixed solution to a second preset temperature range, and ultrasonically emulsifying the mixed solution within the second preset temperature range for a second preset time to obtain an emulsion; and heating the emulsion to a third preset temperature range, and stirring for a third preset time within the third preset temperature range to obtain the isolation working solution. The isolation working solution prepared by the method has excellent comprehensive performance and can be used on the pressure transmitter for a long time, so that the working efficiency of the pressure transmitter can be improved.

Description

Isolation working fluid and preparation method thereof
Technical Field
The application relates to the technical field of petrochemical industry, in particular to an isolation working solution and a preparation method thereof.
Background
The pressure transmitter is an important component for measuring pressure parameters in the oil field work; the pressure transmitter obtains the pressure of the crude oil through a pressure measuring element sensor in the pressure transmitter, converts the pressure of the crude oil into a standard electric signal and transmits the standard electric signal to the central control room so as to obtain a pressure parameter to be measured at the position of the pressure transmitter. After entering the sensor, crude oil becomes hard in the sensor and becomes dead oil, so that a channel of the sensor is blocked, and the pressure transmitter cannot work normally; therefore, isolation working fluid which is not easy to become dead oil, such as transformer oil or engine oil, is required to obtain the pressure of the crude oil and transmit the pressure of the crude oil to the sensor, so that the pressure transmitter can work normally.
In the related technology, isolation working fluid such as transformer oil or engine oil is easy to leak and volatilize in the using process, so that the isolation working fluid is not beneficial to long-term use on the pressure transmitter, and the working efficiency of the pressure transmitter is reduced.
Disclosure of Invention
The embodiment of the application provides an isolation working solution and a preparation method thereof, and the working efficiency of a pressure transmitter can be improved. The technical scheme is as follows:
in one aspect, a method for preparing an isolation working fluid is provided, the method comprising:
mixing polyvinyl acetate emulsion, ethyl silicate, methyl silicone oil and an emulsion stabilizer, and stirring for a first preset time within a first preset temperature range to obtain a mixed solution;
cooling the mixed solution to a second preset temperature range, and ultrasonically emulsifying the mixed solution within the second preset temperature range for a second preset time to obtain an emulsion;
and heating the emulsion to a third preset temperature range, and stirring for a third preset time within the third preset temperature range to obtain the isolation working solution.
In a possible implementation mode, the weight portion of the polyvinyl acetate emulsion is 10-20 parts, the weight portion of the ethyl silicate is 5000-6000 parts, the weight portion of the methyl silicone oil is 3000-4000 parts, and the weight portion of the emulsion stabilizer is 50-60 parts.
In one possible implementation, the emulsion stabilizer is polyvinyl alcohol.
In a possible implementation manner, the first preset temperature range is 10 to 40 ℃, and the first preset time period is 10 to 20min.
In a possible implementation manner, the second preset temperature range is-10 to 5 ℃, and the second preset time period is 15 to 25min.
In a possible implementation manner, the third preset temperature range is 10 to 40 ℃, and the third preset time period is 22 to 26 hours.
In one possible implementation mode, the raw materials for preparing the polyvinyl acetate emulsion comprise monomers and a dispersion medium;
and carrying out emulsion polymerization on the monomer in the dispersion medium to obtain the polyvinyl acetate emulsion.
In one possible implementation, the monomer is vinyl acetate and the dispersion medium is water.
In one possible implementation, the methyl silicone oil includes at least one of hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.
In another aspect, there is provided an isolation working fluid prepared by the method for preparing an isolation working fluid as described in any one of the above.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
the embodiment of the application provides a preparation method of isolation working solution, which comprises the steps of mixing, ultrasonically emulsifying and stirring polyvinyl acetate emulsion, ethyl silicate, methyl silicone oil and an emulsion stabilizer to obtain isolation working solution; according to the method, the polyvinyl acetate emulsion is added, so that the isolation working solution has good antifreezing property and viscosity; by adding ethyl silicate, the isolation working solution can be ensured to have good chemical corrosion resistance; by adding the methyl silicone oil, the isolation working solution can be ensured to have good compression resistance and difficult volatilization; therefore, the isolation working solution prepared by the method has excellent comprehensive performance and can be used on the pressure transmitter for a long time, so that the working efficiency of the pressure transmitter can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a method for preparing an isolation working fluid according to an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The embodiment of the application provides a preparation method of an isolation working solution, and referring to fig. 1, the method comprises the following steps:
step 101: mixing the polyvinyl acetate emulsion, the ethyl silicate, the methyl silicone oil and the emulsion stabilizer, and stirring for a first preset time within a first preset temperature range to obtain a mixed solution.
Wherein, the weight portion of the polyvinyl acetate emulsion is 10 to 20 portions. For example, the polyvinyl acetate emulsion may be present in 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, and the like by weight.
Wherein, the raw materials for preparing the polyvinyl acetate emulsion comprise monomers and dispersion media; and carrying out emulsion polymerization on the monomers in a dispersion medium to obtain the polyvinyl acetate emulsion.
In the examples of the present application, the monomer is vinyl acetate, and the dispersion medium is water; and carrying out emulsion polymerization on the vinyl acetate in water to obtain the polyvinyl acetate emulsion.
The polyvinyl acetate emulsion has good oil resistance, water resistance, low temperature resistance and adhesive property, and has a long storage period. Therefore, the polyvinyl acetate emulsion is added into the isolation working solution, so that the isolation working solution can be ensured to be used in a low-temperature environment, has good antifreezing property, and can be effectively ensured to be used for a long time.
Wherein the weight portion of the ethyl silicate is 5000-6000 portions. For example, the weight parts of ethyl silicate may be 5000 parts, 5100 parts, 5200 parts, 5300 parts, 5400 parts, 5500 parts, 5600 parts, 5700 parts, 5800 parts, 5900 parts, 6000 parts, and the like.
The ethyl silicate has good weather resistance and chemical corrosion resistance, so that the long-term use of the isolation working solution can be effectively ensured by adding the ethyl silicate into the isolation working solution.
Wherein, the weight portion of the methyl silicone oil is 3000 to 4000 portions. For example, the weight parts of the methyl silicone oil may be 3000 parts, 3100 parts, 3200 parts, 3300 parts, 3400 parts, 3500 parts, 3600 parts, 3700 parts, 3800 parts, 3900 parts, 4000 parts, or the like.
Wherein the methyl silicone oil comprises at least one of hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane.
For example, the methyl silicone oil may include hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, and decamethylcyclopentasiloxane; the methyl silicone oil may also include hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane; the methyl silicone oil can also comprise hexamethylcyclotrisiloxane and octamethylcyclotetrasiloxane; the methyl silicone oil may also include decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane.
The methyl silicone oil has good heat resistance, weather resistance and higher compression resistance, and is not easy to volatilize; therefore, the isolation working solution is enabled to be not easy to volatilize by adding the methyl silicone oil into the isolation working solution, and the isolation working solution can bear the compression of the crude oil, so that the pressure of the crude oil can be transmitted.
Wherein the weight portion of the emulsion stabilizer is 50-60 portions. For example, the emulsion stabilizer may be present in an amount of 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts, 60 parts, etc.
Wherein the first preset temperature range is 10-40 ℃. For example, the first predetermined temperature range may be 10 to 15 ℃, 10 to 20 ℃, 10 to 25 ℃, 10 to 30 ℃, 10 to 35 ℃, 15 to 20 ℃, 15 to 25 ℃, 15 to 30 ℃, 15 to 35 ℃, 15 to 40 ℃, 20 to 25 ℃, 20 to 30 ℃, 20 to 35 ℃, 20 to 40 ℃, 25 to 30 ℃, 25 to 35 ℃, 25 to 40 ℃, 30 to 35 ℃, 30 to 40 ℃, 35 to 40 ℃ or the like.
Wherein the first preset time is 10-20 min. For example, the first preset time period may be 10min, 11min, 12min, 13min, 14min, 15min, 16min, 17min, 18min, 19min, 20min, and the like.
In the embodiment of the application, the stirring mode adopts a stirrer for stirring, the polyvinyl acetate emulsion, the ethyl silicate, the methyl silicone oil and the emulsion stabilizer are added into the stirrer, the stirrer is stirred for a first preset time at a first preset temperature range, and the materials in the stirrer are uniformly mixed and stirred to obtain a mixed solution.
Step 102: and cooling the mixed solution to a second preset temperature range, and ultrasonically emulsifying the mixed solution within the second preset temperature range for a second preset time to obtain the emulsion.
Wherein the second preset temperature range is-10 to 5 ℃. The cooling mode is ice water bath cooling.
For example, the second preset temperature range can be-9-5 ℃, 8-5 ℃, 7-5 ℃, 6-5 ℃, 5-5 ℃, 4-5 ℃, 3-5 ℃, 2-5 ℃, 1-5 ℃, 0-5 ℃, 1-5 ℃, 2-5 ℃, 3-5 ℃, 4-5 ℃, 10-4 ℃, 9-4 ℃, 8-4 ℃, 7-4 ℃, 6-4 ℃, 5-4 ℃, 4-4 ℃, 3-4 ℃, 2-4 ℃, 1-4 ℃, 3-3 ℃, 9-3 ℃ and 8-3 ℃, -4 ℃, -2-4 ℃, -1-4 ℃, -3 ℃, -4 ℃, -3 ℃ 7-3 deg.C, -6-3 deg.C, -5-3 deg.C, -4-3 deg.C, -3 deg.C, -2-3 deg.C, -1-3 deg.C, 0-3 deg.C, 1-3 deg.C, 2-3 deg.C, -10-2 deg.C, -9-2 deg.C, -8-2 deg.C, -7-2 deg.C, -6-2 deg.C, -5-2 deg.C, -4-2 deg.C, -3-2 deg.C, -2 deg.C, -1-2 deg.C, -10-1 deg.C, -9-1 deg.C, -8-1 deg.C, -7-1 deg.C, -6-1 deg.C, -4-1 deg.C, -3-1 deg.C, -2-1 deg.C, -1 deg.C, 0-1 deg.C, etc.
Wherein the second preset time is 15-25 min. For example, the second preset time period may be 15min, 16min, 17min, 18min, 19min, 20min, 21min, 22min, 23min, 24min, 25min, and the like.
In the embodiment of the application, the equipment for ultrasonic emulsification is an ultrasonic cell crusher with the model of CP 600; the CP600 type ultrasonic cell crusher comprises a plurality of working levels, the CP600 type ultrasonic cell crusher is ultrasonically emulsified under the condition that the working level is 8 levels and the power is 70 percent, and is cooled by adopting an ice water bath during ultrasonic treatment.
Wherein the emulsion stabilizer is polyvinyl alcohol with a chemical formula of [ C2H4O ]] n (ii) a Polyvinyl alcohol is used as an emulsion stabilizer, has low surface tension, can disperse dispersoid in a mixed solution into fine particles in water, is a good protective colloid, forms a film or an electric double layer when the polyvinyl alcohol is dispersed on the surface of the dispersoid, can charge the dispersoid, can prevent small droplets of the dispersoid from coagulating mutually, enables the dispersoid of polymerized colloid state particles to form an aqueous emulsion stably, does not coagulate and deteriorate, and further enables emulsion formed by emulsification, namely emulsion to be relatively stable.
Step 103: and heating the emulsion to a third preset temperature range, and stirring for a third preset time in the third preset temperature range to obtain the isolation working solution.
Wherein the third preset temperature range is 10-40 ℃. For example, the third predetermined temperature range may be 10 to 15 ℃, 10 to 20 ℃, 10 to 25 ℃, 10 to 30 ℃, 10 to 35 ℃, 15 to 20 ℃, 15 to 25 ℃, 15 to 30 ℃, 15 to 35 ℃, 15 to 40 ℃, 20 to 25 ℃, 20 to 30 ℃, 20 to 35 ℃, 20 to 40 ℃, 25 to 30 ℃, 25 to 35 ℃, 25 to 40 ℃, 30 to 35 ℃, 30 to 40 ℃, 35 to 40 ℃ and the like.
Wherein the third preset time is 22-26 h. For example, the third preset time period may be 22h, 22.5h, 23h, 23.5h, 24h, 24.5h, 25h, 25.5h, 26h, and the like.
The embodiment of the application provides a preparation method of isolation working solution, which comprises the steps of mixing, ultrasonically emulsifying and stirring polyvinyl acetate emulsion, ethyl silicate, methyl silicone oil and an emulsion stabilizer to obtain isolation working solution; according to the method, the polyvinyl acetate emulsion is added, so that the isolation working solution has good antifreezing property and viscosity; by adding ethyl silicate, the isolation working solution can be ensured to have good chemical corrosion resistance; by adding the methyl silicone oil, the isolation working solution can be ensured to have good compression resistance and difficult volatilization; therefore, the isolation working solution prepared by the method has excellent comprehensive performance and can be used on the pressure transmitter for a long time, so that the working efficiency of the pressure transmitter can be improved.
The technical solution of the present invention will be described in detail by specific examples below.
In the following examples, those whose operations are not subject to the conditions indicated, are carried out according to the conventional conditions or conditions recommended by the manufacturer. The raw materials are conventional products which can be obtained commercially by manufacturers and specifications.
Example 1
10g of polyvinyl acetate solution, 5000g of ethyl silicate, 3000g of methyl silicone oil and 50g of polyvinyl alcohol are put into a stirrer, stirred for 15min in the stirrer at the temperature of 15-25 ℃, and the materials in the stirrer are uniformly mixed and stirred to obtain mixed liquid.
Cooling the mixed solution to a temperature range of-2 ℃, ultrasonically emulsifying by using a CP600 type ultrasonic cell crusher under the conditions that the working grade is 8 grades and the power is 70 percent, and cooling by adopting an ice water bath during ultrasonic to keep the temperature within the temperature range of-2 ℃ to obtain the emulsion.
Heating the emulsion to a temperature range of 15-25 ℃, and stirring for 24 hours at the temperature range of 15-25 ℃ to obtain the isolation working solution.
Example 2
15g of polyvinyl acetate solution, 5500g of ethyl silicate, 3500g of methyl silicone oil and 55g of polyvinyl alcohol are put into a stirrer, stirred for 20min in the stirrer at the temperature of 15-25 ℃, and the materials in the stirrer are uniformly mixed and stirred to obtain mixed liquid.
Cooling the mixed solution to a temperature range of-1-5 ℃, performing ultrasonic emulsification by using a CP600 type ultrasonic cell crusher under the conditions that the working grade is 8 grades and the power is 70 percent, and cooling by adopting an ice water bath during ultrasonic treatment to keep the temperature in the temperature range of-1-5 ℃ to obtain the emulsion.
Heating the emulsion to a temperature range of 15-25 ℃, and stirring for 24 hours at the temperature range of 15-25 ℃ to obtain the isolation working solution.
Example 3
20g of polyvinyl acetate solution, 6000g of ethyl silicate, 4000g of methyl silicone oil and 60g of polyvinyl alcohol are put into a stirrer, stirred for 15min in the stirrer at the temperature of 15-25 ℃, and materials in the stirrer are uniformly mixed and stirred to obtain mixed liquid.
Cooling the mixed solution to a temperature range of-5 ℃, ultrasonically emulsifying by using a CP600 type ultrasonic cell crusher under the conditions that the working grade is 8 grades and the power is 70 percent, and cooling by adopting an ice water bath during ultrasonic to keep the temperature within the temperature range of-5 ℃ to obtain the emulsion.
Heating the emulsion to a temperature range of 15-25 ℃, and stirring for 24 hours at the temperature range of 15-25 ℃ to obtain the isolation working solution.
Example 4
10g of polyvinyl acetate solution, 5500g of ethyl silicate, 3500g of methyl silicone oil and 55g of polyvinyl alcohol are put into a stirrer, stirred for 15min in the stirrer at the temperature of 15-25 ℃, and the materials in the stirrer are uniformly mixed and stirred to obtain mixed liquid.
Cooling the mixed solution to a temperature range of-2 ℃, ultrasonically emulsifying by using a CP600 type ultrasonic cell crusher under the conditions that the working grade is 8 grades and the power is 70 percent, and cooling by adopting an ice water bath during ultrasonic to keep the temperature within the temperature range of-2 ℃ to obtain the emulsion.
Heating the emulsion to a temperature range of 15-25 ℃, and stirring for 24 hours at the temperature range of 15-25 ℃ to obtain the isolation working solution.
Example 5
15g of polyvinyl acetate solution, 6000g of ethyl silicate, 4000g of methyl silicone oil and 60g of polyvinyl alcohol are put into a stirrer, stirred for 15min in the stirrer at the temperature of 15-25 ℃, and materials in the stirrer are uniformly mixed and stirred to obtain mixed liquid.
Cooling the mixed solution to a temperature range of-2 ℃, ultrasonically emulsifying by using a CP600 type ultrasonic cell crusher under the conditions that the working grade is 8 grades and the power is 70 percent, and cooling by adopting an ice water bath during ultrasonic to keep the temperature within the temperature range of-2 ℃ to obtain the emulsion.
Heating the emulsion to a temperature range of 15-25 ℃, and stirring for 24 hours at the temperature range of 15-25 ℃ to obtain the isolation working solution.
Example 6
20g of polyvinyl acetate solution, 5000g of ethyl silicate, 3000g of methyl silicone oil and 50g of polyvinyl alcohol are put into a stirrer, stirred for 15min in the stirrer at the temperature of 15-25 ℃, and the materials in the stirrer are uniformly mixed and stirred to obtain mixed liquid.
Cooling the mixed solution to a temperature range of-2 ℃, ultrasonically emulsifying by using a CP600 type ultrasonic cell crusher under the conditions that the working grade is 8 grades and the power is 70 percent, and cooling by adopting an ice water bath during ultrasonic to keep the temperature within the temperature range of-2 ℃ to obtain the emulsion.
Heating the emulsion to a temperature range of 15-25 ℃, and stirring for 24 hours at the temperature range of 15-25 ℃ to obtain the isolation working solution.
Referring to table 1, table 1 is a parameter of the isolated working fluid obtained by the above example.
TABLE 1
Figure BDA0003085402780000081
Figure BDA0003085402780000091
As can be seen from table 1, the density of the isolation working fluid is high, so that the isolation working fluid is not easy to leak and volatilize.
As can be seen from Table 1, the kinematic viscosity of the isolated working fluid is 30-3600mm 2 In the range of/s, so that the isolation working fluid can be well isolated from the inside of the valveAnd further facilitates the transfer of crude oil pressure.
As can be seen from table 1, the freezing point of the isolation working fluid is low, so that the isolation working fluid has good freezing resistance.
As can be seen from Table 1, the flash point of the isolation working solution is high, which indicates that the evaporation property of the isolation working solution is poor, i.e., the isolation working solution is not easy to volatilize.
As can be seen from Table 1, the acid value of the isolation working solution is low and is a non-corrosive liquid, so that the isolation working solution is ensured not to corrode and damage the isolation valve when working in the isolation valve.
As can be seen from table 1, the isolation working fluid has high oxidation stability, which indicates that the isolation working fluid has strong ability to resist heat and oxidation and maintain its properties without permanent change when stored for a long time or used at a high temperature for a long time, and thus the isolation working fluid can be used for a long time.
As can be seen from table 1, the interfacial tension of the isolation working fluid is large, so that the isolation working fluid and the isolation valve have long-term stability of contact; meanwhile, the dielectric loss factor of the isolation working solution is low, so that the loss of the isolation working solution in long-term contact with the isolation valve is low, and long-term use of the isolation working solution is guaranteed.
The embodiment of the application provides a preparation method of an isolation working solution, which comprises the steps of mixing, ultrasonically emulsifying and stirring a polyvinyl acetate emulsion, ethyl silicate, methyl silicone oil and an emulsion stabilizer to obtain the isolation working solution; according to the method, the polyvinyl acetate emulsion is added, so that the isolation working solution has good antifreezing property and viscosity; by adding ethyl silicate, the isolation working solution can be ensured to have good chemical corrosion resistance; by adding the methyl silicone oil, the isolation working solution can be ensured to have good compression resistance and difficult volatilization; therefore, the isolation working solution prepared by the method has excellent comprehensive performance and can be used on the pressure transmitter for a long time, so that the working efficiency of the pressure transmitter can be improved.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A method of preparing an insulating working fluid, the method comprising:
mixing polyvinyl acetate emulsion, ethyl silicate, methyl silicone oil and an emulsion stabilizer, and stirring for a first preset time within a first preset temperature range to obtain a mixed solution;
cooling the mixed solution to a second preset temperature range, and ultrasonically emulsifying the mixed solution within the second preset temperature range for a second preset time to obtain an emulsion;
and heating the emulsion to a third preset temperature range, and stirring for a third preset time within the third preset temperature range to obtain the isolation working solution.
2. The preparation method of the isolation working solution according to claim 1, wherein the polyvinyl acetate emulsion is 10 to 20 parts by weight, the ethyl silicate is 5000 to 6000 parts by weight, the methyl silicone oil is 3000 to 4000 parts by weight, and the emulsion stabilizer is 50 to 60 parts by weight.
3. The method of claim 1, wherein the emulsion stabilizer is polyvinyl alcohol.
4. The method for preparing the isolation working fluid according to claim 1, wherein the first preset temperature range is 10-40 ℃, and the first preset time period is 10-20 min.
5. The method for preparing the isolation working fluid according to claim 1, wherein the second preset temperature range is-10 to 5 ℃, and the second preset time period is 15 to 25min.
6. The method for preparing the isolation working fluid according to claim 1, wherein the third preset temperature range is 10-40 ℃, and the third preset time period is 22-26 h.
7. The method for preparing the isolation working fluid according to claim 1, wherein raw materials for preparing the polyvinyl acetate emulsion comprise a monomer and a dispersion medium;
and carrying out emulsion polymerization on the monomer in the dispersion medium to obtain the polyvinyl acetate emulsion.
8. The method of claim 7, wherein the monomer is vinyl acetate and the dispersion medium is water.
9. The method of claim 1, wherein the methyl silicone oil comprises at least one of hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.
10. An insulating working fluid prepared by the method of preparing an insulating working fluid according to any one of claims 1 to 9.
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