CN106437697B - Visual model for simulating five-point well pattern microscopic etching and use method thereof - Google Patents
Visual model for simulating five-point well pattern microscopic etching and use method thereof Download PDFInfo
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- CN106437697B CN106437697B CN201610953176.8A CN201610953176A CN106437697B CN 106437697 B CN106437697 B CN 106437697B CN 201610953176 A CN201610953176 A CN 201610953176A CN 106437697 B CN106437697 B CN 106437697B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
Abstract
The invention discloses a visual model for simulating five-point well pattern microscopic etching and a using method thereof, wherein the visual model comprises a light-gathering cover, a base sealing film, an etching glass sheet, an observation glass sheet, a light-gathering cover sealing film and a bolt; base and spotlight lid align, through bolted connection, in the cavity that forms between spotlight lid and the base, from the bottom up superposes in proper order and places base sealing film, sculpture glass piece, observation glass piece, spotlight lid sealing film. The etching glass slide and the observation glass slide of the microscopic etching visual model used in the experiment are not sintered together, so that the etching glass slide can be cleaned and reused; the model simulates radial flow by arranging the vertical pipe section according to actual oil reservoir conditions, so that the seepage state of fluid flowing through a shaft during oil reservoir exploitation can be reflected more truly; this experimental model is through setting up the shoulder hole on spotlight covers, lets the bolt head of bolt can put into the shoulder hole, can not form outstanding at spotlight lid surface, is convenient for place and observe.
Description
Technical Field
The invention relates to a five-point well pattern micro-etching simulation visual model for simulating underground fluid flow and a using method thereof, belonging to the technical field of oil and gas field development.
Background
In order to research the contact relationship between fluids in rock pores and the mechanism of external fluid for displacing crude oil in an oil reservoir, a microscopic oil displacement physical simulation technology becomes an important means for people to research a microscopic oil displacement mechanism, wherein a visualized physical model of a microscopic natural rock core or a simulated rock core needs to be accessed into a displacement flow during microscopic oil displacement, and a connecting device, namely the function of a model holder is needed.
Because the underground oil reservoir is in a high-temperature and high-pressure state, the temperature and the pressure of the oil reservoir need to be simulated to more accurately simulate the underground oil reservoir and reflect the exploitation condition of the underground oil reservoir. Therefore, during the research of the simulation experiment, the micro displacement simulation model is heated and pressurized as much as possible. For the research in the aspect, certain achievements are obtained at home and abroad at present, and the heating modes aiming at the microcosmic displacement model holder are mainly water bath/oil bath heating, air heating, electric heating and the like. However, for water bath/oil bath, because a certain space exists between the pipeline and the model, the heating effect by adopting the mode is not ideal, and the problems of long time consumption, slow temperature rise and the like occur; and adopt the mode to the cavity heating to heat and pressurize the glass piece, for guaranteeing the heating effect, the cavity all needs to have certain space, leads to the cavity height to increase, and then holds in the palm high glass piece, has shortened the distance of microscope and glass piece, influences the magnification, and then influences the observation precision. Meanwhile, the device used in the prior art cannot simulate the radial flow of a shaft and cannot reflect the bending condition of a flow channel in the water injection process.
At present, the physical models used for displacement mechanism research and various oil recovery chemical auxiliary agent researches are infinite in the process of researching oil and gas fields, but all the physical models are inevitable to cause waste, and the main characteristic is that the micro model can not be reused. The utility model discloses a utility model patent of publication No. CN203499659U discloses a sculpture is filled out sand micro glass model for displacement experiment, including bottom plate and panel, it has the notes liquid mouth to open on the panel, has the recess that is corroded out on the bottom plate, fills the natural core powder or the quartz sand of certain mesh number in the recess, and bottom plate and panel cementation are in the same place. Utility model patent application No. 201510868706.4 discloses a preparation method of a microscopic oil displacement glass model, which comprises etching a base glass, and finally sintering a cover glass and an etching glass together to form a microscopic displacement model; however, the above models have certain defects in the aspect of repeated use, and although the existing glass model can simulate the oil-water distribution condition in the displacement process, due to the defects of the manufacturing method, the residual fluid in the experimental period cannot be completely cleaned, so that the model cannot be reused, a new model needs to be purchased and processed every time, and great cost waste is caused. The invention patent with the publication number of CN103558135B discloses a reusable glass chip model, but the model is not provided with any structure capable of directly observing the internal flow field, and only the pressure value can be analyzed to draw a conclusion, and the flow field cannot be directly observed, so that the accuracy is greatly reduced.
Disclosure of Invention
Aiming at the problems, the invention provides a visual model for simulating the micro-etching of a five-point well pattern and a using method thereof.
The technical scheme of the invention is as follows:
a visual model for simulating the micro-etching of a five-point well pattern comprises a light-gathering cover, a base sealing film, an etching glass sheet, an observation glass sheet, a light-gathering cover sealing film and a bolt; base and spotlight lid align, through bolted connection, in the cavity that forms between spotlight lid and the base, from the bottom up superposes in proper order and places base sealing film, sculpture glass piece, observation glass piece, spotlight lid sealing film piece.
Furthermore, the light-gathering cover is of a square structure, four through holes are formed in four sides of the light-gathering cover, stepped holes are formed in the upper ends of the through holes, and the diameter of each stepped hole is slightly larger than that of a nut of the connecting bolt; a section of square boss is arranged at the lower side of the middle part of the light-gathering cover, and a through round hole is arranged at the center of the boss and is used as a light-gathering hole;
the base is of a square structure, and four threaded holes are formed in four sides of the base; a section of square counter bore is arranged in the middle of the base, and a through round hole is arranged in the center of the square counter bore and serves as an observation hole; two inlet pipelines which are symmetrical along the diagonal line are arranged on two sides of one diagonal line of the base, two outlet pipelines which are symmetrical along the diagonal line are arranged on two sides of the other diagonal line of the base, the two mutually perpendicular inlet pipelines extend to positions right below corresponding corners of the square counter bore and are connected with each other, and a vertical pipe section which upwards penetrates through the lower surface of the square counter bore is upwards arranged from a connection point; two mutually perpendicular outlet pipelines also extend to the positions right below the corresponding corners of the square counter bore and are connected, and a vertical pipe section which upwards penetrates through the lower surface of the square counter bore is arranged upwards from the connecting point;
the boss of the light-gathering cover is matched with the four sides of the counter bore of the base in size, the height of the boss is smaller than the depth of the counter bore, and the boss of the light-gathering cover can be placed into the counter bore of the base to form a cavity.
Furthermore, the light gathering hole is an upper conical section and a lower straight cylinder section; the observation hole is a lower conical section and an upper straight cylinder section; the diameter of the observation hole is the same as that of the light gathering hole, and the taper of the tapered section is the same and is 30 degrees.
Furthermore, pore structures are carved on the upper surface of the etching glass sheet and are attached to the lower surface of the observation glass sheet, a pore structure section between the two glass sheets forms a micro channel, and except the micro channel, other attachment surfaces are in a close attachment state.
Furthermore, the width of the etched glass sheet and the width of the observation glass sheet are slightly smaller than that of the counter bore of the base, and the inlet pipeline and the outlet pipeline can respectively pass through the two vertical pipe sections and form a flow channel through the micro-channel.
Furthermore, a matched plug and a matched quick connector are arranged between the two inlet pipelines and the two outlet pipelines.
Further, the sealing film of the light-gathering cover is a silicon gel sheet shaped like a Chinese character 'wang'; the base sealing rubber sheet is an I-shaped silica gel sheet, and the width of the narrow part in the middle of the base sealing rubber sheet is smaller than the width of the counter bore. So design can make the sealed film of base under the condition of realization sealed effect, can not influence bolted connection, reserves the runner between cavity and vertical pipe section simultaneously.
The invention has the following beneficial effects:
1. the etching glass sheet and the observation glass sheet of the microscopic etching visual model of the experiment are not sintered together and are placed in the model holder, wherein the etching glass sheet is arranged below, the observation glass sheet is arranged above, and the glass sheet is fixed and compacted by screwing the screw to form the microscopic etching model;
2. the experimental model simulates radial flow by arranging the vertical pipe section according to actual oil reservoir conditions, can be particularly used for a five-point well pattern in oil extraction engineering, and can reflect the condition of oil extraction operation more truly;
3. this experimental model is through setting up the shoulder hole on the spotlight lid, lets the bolt head of bolt can put into the shoulder hole, can not form outstanding on spotlight lid surface, is convenient for place and observe.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the base;
FIG. 3 is a schematic view of another angular configuration of the base;
FIG. 4 is a top view of the base;
FIG. 5 is an installation view of a base sealing gasket on a base;
FIG. 6 is a schematic view of the light gathering cover structure;
FIG. 7 is a schematic view of another angle structure of the light-gathering cover;
fig. 8 is a state diagram of the use of the present invention.
In the figure, 1, a light-gathering cover, 1-1, a through hole, 1-2, a boss, 1-3, a light-gathering hole, 2, a base, 2-1, a threaded hole, 2-2, a counter bore, 2-3, an observation hole, 3, a light-gathering cover sealing film, 4, an observation glass sheet, 5, an etched glass sheet, 6, a base sealing film, 7, an inlet pipeline, 8, an outlet pipeline, 9, a vertical pipe section, 10, a microscopic hole channel, 11, a light source, 12 and a microscope.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-7, a visual model for simulating the micro-etching of a five-point well pattern comprises a light-gathering cover 1, a base 2, a base sealing film 6, an etching glass sheet 5, an observation glass sheet 4, a light-gathering cover sealing film 3 and bolts; the base 2 is aligned with the light-gathering cover 1 and connected with the light-gathering cover 1 through bolts, the light-gathering cover 1 is of a square structure, four through holes 1-1 are formed in four sides of the light-gathering cover, stepped holes are formed in the upper ends of the through holes 1-1, and the diameter of each stepped hole is slightly larger than that of a nut of each connecting bolt; a section of square boss 1-2 is arranged on the lower side of the middle part of the light-gathering cover 1, and a through round hole is arranged in the center of the boss 1-2 and is used as a light-gathering hole 1-3;
the base 2 is of a square structure, and four threaded holes 2-1 are formed in four sides of the base; a section of square counter bore 2-2 is arranged in the middle of the base 2, and a through round hole is arranged in the center of the counter bore 2-2 and serves as an observation hole 2-3; two inlet pipelines 7 and two outlet pipelines 8 which are symmetrical along the diagonal line are respectively arranged on two opposite sides of two opposite corners of the base, the two mutually perpendicular inlet pipelines 7 extend to positions right below the corresponding corners of the counter bore 2-2 to be connected, and a vertical pipe section 9 which upwards penetrates through the lower surface of the counter bore 2-2 is upwards arranged from a connecting point; two mutually vertical outlet pipelines 8 also extend to the positions right below the corresponding corners of the counter bores 2-2 to be connected, and a vertical pipe section which upwards penetrates through the lower surfaces of the counter bores 2-2 is arranged upwards from the connecting point; all there are supporting plug and quick-operation joint between 2 entry pipeline 7 and 2 export pipelines 8.
The boss 1-2 of the condensation cover 1 is matched with the four sides of the counter bore 2-2 of the base in size, the boss 1-2 is shorter than the depth of the counter bore 2-2, the boss 1-2 of the condensation cover 1 can be placed into the counter bore 2-2 and form a cavity, a base sealing film 6, an etched glass sheet 5, an observation glass sheet 4 and a condensation cover sealing film 3 are sequentially stacked and placed in the cavity from bottom to top, a pore structure is carved on the upper surface of the etched glass sheet 5 and is attached to the lower surface of the observation glass sheet 4, a pore structure section between the two glass sheets forms a micro channel 10, except the micro channel, other attachment surfaces are in a close attachment state, the widths of the etched glass sheet 5 and the observation glass sheet 4 are slightly smaller than the counter bore 2-2, and the inlet pipeline 7 and the outlet pipeline 8 can respectively pass through the two vertical straight pipe sections 9 and form a flow channel through the micro channel 10; the light-gathering cover sealing film 3 is a silicon slice shaped like a Chinese character 'wang', the base sealing film 6 is an I-shaped silicon slice, and the width of the narrow part of the middle part of the base sealing film is smaller than the width of the counter bore 2-2.
As shown in fig. 3, 7 and 8, the light-gathering holes 1-3 are upper conical sections and lower straight cylindrical sections; the observation hole 2-3 is a conical section at the lower part and a straight cylinder section at the upper part, so that the light source 11 can be conveniently converged together to form a halo suitable for experimental observation; the diameter of the observation hole 2-3 is the same as that of the light gathering hole 1-3, the taper of the conical section is the same and is 30 degrees, so that the objective lens of the microscope 12 can conveniently extend into the observation hole, the distance between the observation hole and the glass sheet 4 is smaller, and the observation is clearer.
The invention provides a visual model for simulating five-point well pattern microscopic etching, which comprises the following steps of specifically assembling and carrying out experiments:
1) Cutting the base sealing rubber sheet 6 into an I shape, wherein the width of the middle part of the base sealing rubber sheet is slightly smaller than that of the counter bore 2-2, as shown in figure 5, placing the base sealing rubber sheet into the installed base 2, wherein the edge parts of the upper side and the lower side of the base sealing rubber sheet 6 can emerge, cutting off the part of the base sealing rubber sheet, which is more than 2mm above the contact part of the base sealing rubber sheet and the etched glass sheet 5, reserving a space at the connection part of the vertical pipe section and the counter bore, enabling the vertical pipe section to be completely adapted to the counter bore, not influencing the connection of the vertical pipe section and the counter bore, and reserving a flow channel from the vertical pipe section to the microscopic channel;
2) Wiping the glass slide by using a piece of lens wiping paper, tightly attaching the observation glass piece 4 and the groove surface of the etched glass piece 5, enabling the micro-channel to be positioned between the two glass pieces, and driving and evacuating gas in the micro-channel to form a combined glass slide;
3) Placing the attached combined glass sheet into a base in the downward direction of the etched glass sheet 5 and pressing tightly;
4) Placing the sealing film 3 of the light-gathering cover on the upper surface of the light-gathering cover 1, paying attention to not blocking the through hole 1-1, closing the observation cover 1, pressing the boss 1-2 into the counter bore 2-2, and tightening bolts around the observation cover 1 and the base 2 because the sealing film 3 of the light-gathering cover is also pressed and deformed, wherein the tightening process is required to pay attention to smooth and stable tightening, so that the combined slide is prevented from being crushed, and meanwhile, the halo shape is regular and is positioned in the center of the combined slide;
5) Screwing up screw plugs at two ends of the visual model for simulating the five-point well pattern micro etching, observing whether an inlet pipeline 7 and an outlet pipeline 8 of the visual model for simulating the five-point well pattern micro etching are smooth or not, and if the blockage occurs, dredging the blockage by using a needle or other tools and then screwing up the blockage;
6) An inlet pipeline 7 and an outlet pipeline 8 of the visual model for simulating the five-point well pattern micro etching are respectively connected with a plug and a quick coupling;
7) The inlet pipeline 7 is connected with an air compressor, the visual model simulating the five-point well pattern micro etching is placed in a basin, the air compressor is opened, the quick joint is connected, whether continuous bubbles emerge from the quick joint of the outlet pipeline 8 or not is observed, and if not, whether the air tightness of the inlet pipeline 7 and the air tightness of the outlet pipeline 8 are good or not is checked; if continuous bubbles emerge, blocking the quick connector of the outlet pipeline 8 by hands, observing whether the combined slide has a gas channeling phenomenon, and if the combined slide has the gas channeling phenomenon, indicating that the visual model for simulating the five-point well pattern micro etching is not screwed down and needs to be screwed down again;
8) And taking out the visual model for simulating the five-point well pattern micro etching, immediately wiping, and then closing an air compressor switch to avoid suck back.
The model is mainly characterized in that the etched glass sheet 5 can be repeatedly used, and after the displacement experiment is finished, orderly cleaning is carried out, and the specific implementation steps are as follows:
1) After the experiment is finished, turning over the model, unscrewing the bolt, taking out the light-gathering cover 1, slowly taking out the light-gathering cover sealing film 3, pushing out the etched glass sheet 5 and the observation glass sheet 4 from the inner side of the observation hole 2-3, separating the etched glass sheet and the observation glass sheet, putting the etched glass sheet and the observation glass sheet into a beaker filled with industrial alcohol, putting the beaker into an ultrasonic cleaner, cleaning for 10 minutes, and repeating twice;
2) The etched glass sheet 5 and the observation glass sheet 4 which are cleaned by the alcohol are put into a beaker filled with distilled water, the beaker is put into an ultrasonic cleaner and cleaned for 10 minutes, and the cleaning is repeated twice;
3) After the cleaning, the cleaned etched glass sheet 5 and the observation glass sheet 4 are put into an oven to evaporate water, and finally, the etched glass sheet and the observation glass sheet are stored for reuse.
In the process of the experiment of the model, because the model is inverted, the light-gathering cover 1 is placed at the lower part and is contacted with the objective table, and the bolt head is positioned in the stepped hole of the through hole 1-1, the contact surface of the light-gathering cover 1 and the objective table is flat, and the light source 11 can conveniently irradiate.
In the experimental process, due to the fact that the model is inverted, after liquid enters from the inlet pipeline 7, the liquid flows downwards through the vertical pipe section 9 to simulate a water injection well, then the liquid enters a cavity between the base 2 and the light gathering cover 1, flows to the side face of the combined glass slide through a gap between the base sealing rubber sheet 6 and the counter bore 2-2, flows to the vertical pipe section 9 on the other side through the micro channel 10 (the slit in the figure 1 is a schematic diagram, the gap cannot be seen from the side face actually) and flows upwards, and finally flows out through the outlet pipeline 8 to simulate an oil displacement process.
Although the combined glass slide inside the visual model for simulating five-point well pattern micro etching is tightly attached to the two rubber gaskets, a gap is inevitably left, the experimental accuracy is seriously influenced if the combined glass slide is not emptied, a Jamin effect can be caused if air is left in the gap, and a phenomenon that two fluids are mixed in when the residual liquid fluid displaces the other fluid can be caused if the residual liquid fluid is left in the gap. Therefore, the emptying function is needed in the saturated water, saturated oil, water flooding oil and other processes, and the 2 inlet pipelines 7 and the 2 outlet pipelines 8 are connected together in a right angle, so that the requirement is met; the two outlet pipes 8 opposite to each other are sealed by using screws; because outlet pipe 8 is sealed, can not form the pressure differential with the inlet pipe 7 of feed liquor, saturated water can flow out along another inlet pipe 7, when 1 ~ 2 drips are flowed out to inlet pipe 7, blocks this inlet pipe 7 with the plug, then reopens two outlet pipe 8. 2 outlet pipes 8 are connected, which operate on the same principle as described above for the inlet pipe 7.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that the present invention is not limited to the above-mentioned embodiment, and further modifications can be made without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.
Claims (8)
1. A visual model for simulating five-point well pattern microscopic etching is characterized by comprising a light-gathering cover, a base sealing film, an etching glass sheet, an observation glass sheet, a light-gathering cover sealing film and a bolt; the base and the light-gathering cover are aligned and connected through a bolt, and a base sealing film, an etched glass sheet, an observation glass sheet and a light-gathering cover sealing film are sequentially stacked and placed in a cavity formed between the light-gathering cover and the base from bottom to top;
the light-gathering cover is of a square structure, four through holes are formed in four sides of the light-gathering cover, stepped holes are formed in the upper ends of the through holes, and the diameter of each stepped hole is slightly larger than that of a nut of the connecting bolt; a section of square boss is arranged at the lower side of the middle part of the light-gathering cover, and a through round hole is arranged at the center of the boss and is used as a light-gathering hole;
the base is of a square structure, and four threaded holes are formed in four sides of the base; a section of square counter bore is arranged in the middle of the base, and a through round hole is arranged in the center of the square counter bore and serves as an observation hole; two inlet pipelines which are symmetrical along a diagonal line are arranged on two sides of one diagonal line of the base, two outlet pipelines which are symmetrical along the diagonal line are arranged on two sides of the other diagonal line of the base, the two mutually perpendicular inlet pipelines extend to positions right below corresponding corners of the square counter bore and are connected with each other, and a vertical pipe section which upwards penetrates through the lower surface of the square counter bore is upwards arranged from a connecting point; two mutually perpendicular outlet pipelines also extend to the positions right below the corresponding corners of the square counter bore and are connected, and a vertical pipe section which upwards penetrates through the lower surface of the square counter bore is arranged upwards from the connecting point;
the boss of the light-gathering cover is matched with the four sides of the counter bore of the base in size, the height of the boss is smaller than the depth of the counter bore, and the boss of the light-gathering cover can be placed into the counter bore of the base to form a cavity.
2. The visual model for simulating the micro-etching of the five-point well pattern is characterized in that the light gathering holes are an upper conical section and a lower straight-cylindrical section; the observation hole is a lower conical section and an upper straight cylinder section; the diameter of the observation hole is the same as that of the light gathering hole, and the taper of the tapered section is the same and is 30 degrees.
3. The visual model for simulating the micro-etching of the five-point well pattern according to claim 1, wherein the upper surface of the etching glass sheet is provided with a pore structure and is attached to the lower surface of the observation glass sheet, the pore structure section between the two glass sheets forms a micro channel, and other attachment surfaces except the micro channel are in a close attachment state.
4. The visual model for simulating the micro-etching of the five-point well pattern as recited in claim 2, wherein the width of the etched glass sheet and the width of the observation glass sheet are slightly smaller than the counter bore of the base, and the inlet pipeline and the outlet pipeline can respectively pass through the two vertical pipe sections and form a flow channel through the micro-channel.
5. The visual model for simulating the micro-etching of the five-point well pattern as recited in claim 2, wherein a matched plug and a matched quick connector are arranged between the two inlet pipelines and between the two outlet pipelines.
6. The visual model for simulating the micro-etching of the five-point well pattern according to claim 1, wherein the sealing film of the light-gathering cover is a silicon gel sheet shaped like a Chinese character 'wang'; the base sealing rubber sheet is an I-shaped silica gel sheet, and the width of the narrow part of the middle part of the base sealing rubber sheet is smaller than that of the counter bore; the base sealing film can not affect the bolt connection under the condition of realizing the sealing effect, and meanwhile, a flow channel between the cavity and the vertical pipe section is reserved.
7. A method for using a visual model for simulating the micro-etching of a five-point well pattern, which uses the visual model for simulating the micro-etching of the five-point well pattern as claimed in any one of claims 1 to 6, and which comprises the following steps:
1) Cutting a sealing rubber sheet of the base into an I shape, wherein the width of the middle part of the sealing rubber sheet is slightly smaller than that of the counter bore, putting the sealing rubber sheet into the installed base, wherein the edge parts of the upper side and the lower side of the sealing rubber sheet of the base can emerge, the part of the sealing rubber sheet, which is more than 2mm above the part of the sealing rubber sheet, which is in contact with the etched glass sheet is cut off, a space is reserved at the joint of the vertical pipe section and the counter bore, so that the sealing rubber sheet of the base can completely adapt to the counter bore, the connection of the vertical pipe section in the counter bore is not influenced, and a flow channel from the vertical pipe section to a microscopic channel is reserved;
2) Wiping the glass slide by using a piece of lens wiping paper, tightly attaching the observation glass slide and the groove surface of the etched glass slide, enabling the micro-channel to be positioned between the two glass slides, and driving and evacuating gas in the micro-channel to form a combined glass slide;
3) Placing the attached combined glass sheet into a base in the downward direction of the etched glass sheet and pressing tightly;
4) Placing the sealing film of the light-gathering cover on the upper surface of the light-gathering cover, paying attention to not blocking the through hole, closing the observation cover, pressing the boss into the counter bore, and tightening bolts around the observation cover and the base in the tightening process because the sealing film of the light-gathering cover is also pressed and deformed, so that the combined slide is prevented from being crushed, and meanwhile, the halo shape is regular and is positioned in the center of the combined slide;
5) Screwing up screw plugs at two ends of the visual model for simulating the five-point well pattern micro etching, observing whether an inlet pipeline and an outlet pipeline of the visual model for simulating the five-point well pattern micro etching are smooth or not, and if the blockage occurs, dredging the blockage by using a needle or other tools and then screwing up the blockage;
6) An inlet pipeline and an outlet pipeline of the visual model for simulating the five-point well pattern micro etching are respectively connected with a plug and a quick coupling;
7) The inlet pipeline is connected with an air compressor, the visual model simulating the five-point well pattern micro etching is placed in a basin, the air compressor is opened, the quick connector is connected, whether continuous bubbles emerge from the quick connector of the outlet pipeline is observed, and if not, whether the air tightness of the inlet pipeline and the air tightness of the outlet pipeline are good is checked; if continuous bubbles emerge, blocking a quick connector of an outlet pipeline by hands, observing whether the combined slide has a gas channeling phenomenon, and if the combined slide has the gas channeling phenomenon, indicating that the visual model simulating the five-point well pattern micro etching is not screwed down and needs to be screwed down again;
8) And taking out the visual model for simulating the five-point well pattern micro etching, immediately wiping, closing an air compressor switch to avoid suck back, and cleaning the etched glass sheet to enable the etched glass sheet to be recycled.
8. The use method of the visual model for simulating the micro-etching of the five-point well pattern is characterized in that the specific implementation steps of the step 8) are as follows:
1) After the experiment is finished, turning over the model, unscrewing the bolt, taking out the light-gathering cover, slowly taking out the light-gathering cover sealing rubber sheet, then pushing out the etched glass sheet and the observation glass sheet from the inner side of the observation hole, separating the etched glass sheet and the observation glass sheet, then placing the glass sheet into a beaker filled with industrial alcohol, placing the beaker into an ultrasonic cleaner, cleaning for 10 minutes, and repeating the steps for two times;
2) The etched glass piece and the observation glass piece which are cleaned by the alcohol are put into a beaker filled with distilled water, the beaker is put into an ultrasonic cleaner and cleaned for 10 minutes, and the cleaning is repeated twice;
3) And after cleaning, putting the cleaned etched glass sheet and the observation glass sheet into an oven to evaporate water, and finally storing for reuse.
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