Constant-speed preparation device for emulsified acid used in petroleum industry

Abstract

The utility model relates to an emulsified acid constant -speed preparation device for petroleum industry, including base, the one side of base top places has emulsified acid preparation jar, the other side of base top places has acid liquid jar, and the rubber plug body is inlayed in the top of acid liquid jar, and emulsified acid stirring preparation subassembly is fixedly installed in the side of base top near preparation jar, and the scraping subassembly for cleaning emulsified acid preparation jar inner surface is fixed on emulsified acid stirring preparation subassembly. The utility model has the beneficial effects that: can realize the function of constant -speed drop of acid liquid to the oil phase of stirring, replaces traditional drop funnel, solves the problem that manual drop of acid liquid speed is not stable, and batch repeatability is poor, and the problem that operation risk is high, significantly improves the stability, safety and reliability of experimental data of emulsified acid preparation, and still can scrape and clean emulsified acid preparation jar inner surface, effectively prevents the situation that appears in emulsified acid preparation process and sticks, and the practicality is better.

Description

Technical Field

[0001] This utility model relates to the field of emulsified acid preparation, specifically to a constant-rate emulsified acid preparation device for the petroleum industry. Background Technology

[0002] Emulsified acid is a water-in-oil (W / O) emulsion composed of an oil phase (such as diesel or white oil), an aqueous phase (usually a strong acid solution such as hydrochloric acid or hydrofluoric acid), and an emulsifier. It is widely used in acidizing stimulation of oil and gas wells and has advantages such as slowing down the process, preventing swelling, and reducing corrosion. When studying its performance in the laboratory (such as demulsification time, acid-rock reaction rate, corrosion inhibition efficiency, etc.), the repeatability and stability of the preparation process are crucial.

[0003] The current standard laboratory preparation method involves adding the oil phase and emulsifier to a stirring cup, setting a target speed on the stirrer to create a vortex, and simultaneously pouring the prepared acid phase into a dropping funnel. The acid is then slowly added dropwise to the stirring cup by manually adjusting the stopcock. However, this method has significant drawbacks: Flow rate is difficult to control precisely: the opening degree of the glass or PTFE stopcock depends on manual feel, easily leading to inconsistent acid flow rates due to uneven operating force, even resulting in "dropping interruptions" or "sudden surges"; batch repeatability is poor: inconsistent dropping rates by different personnel or even the same person in different operations lead to variations in shear conditions during each emulsification process, resulting in significant differences in the particle size distribution and stability of the emulsified acid, severely affecting the reliability of experimental data; safety hazards exist: strong acids (such as concentrated hydrochloric acid) are volatile and corrosive, and prolonged close-range manual operation can easily cause skin burns or inhalation of harmful gases, requiring further improvement.

[0004] Therefore, it is necessary to design a constant-rate emulsified acid preparation device for the petroleum industry. Utility Model Content

[0005] Therefore, this utility model provides a constant-rate emulsified acid preparation device for the petroleum industry to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a constant-speed emulsified acid preparation device for the petroleum industry, comprising a base, an emulsified acid preparation tank placed on one side of the top of the base, an acid tank placed on the other side of the top of the base, a rubber stopper embedded in the top of the acid tank, an emulsified acid stirring and preparation component fixedly installed on the side of the top of the base near the preparation tank, a scraping component for cleaning the inner surface of the emulsified acid preparation tank fixed on the emulsified acid stirring and preparation component, and an acid uniform addition component fixed in the middle of the top of the base.

[0007] Preferably, the emulsified acid stirring and preparation assembly includes a right-angle frame, the bottom end of which is fixed to the rear side of the top of the base near the preparation tank, and an electric push rod is vertically fixed to the top of the right-angle frame. A first connecting plate is fixed to the bottom end of the output shaft of the electric push rod.

[0008] Preferably, a motor housing is fixed to the bottom of the first connecting plate, a reducer is vertically fixed to the bottom of the inner wall of the motor housing, a first servo motor is vertically fixed to the top of the reducer, the output shaft of the first servo motor is fixedly connected to the input shaft of the reducer, and the bottom end of the output shaft of the reducer vertically passes through the bottom of the motor housing.

[0009] Preferably, a stirring paddle is fixed at the bottom end of the output shaft of the reducer, and the stirring paddle is located above the preparation tank.

[0010] Preferably, the scraping assembly includes a U-shaped connecting plate, which is fixed to the side and bottom of the stirring paddle, and a U-shaped scraper is fixed to the surface of the U-shaped connecting plate.

[0011] Preferably, when the stirring paddle is located inside the preparation tank, the surface of the U-shaped scraper is in contact with the inner surface of the preparation tank.

[0012] Preferably, the acid uniform addition component includes a peristaltic pump, the bottom end of which is fixed to the middle of the top of the base. The inlet end of the peristaltic pump is fixedly connected to an acid suction tube. The acid suction tube is vertical and sealably penetrates the rubber stopper, and the bottom end of the acid suction tube extends to the bottom of the inside of the acid tank. The outlet end of the peristaltic pump is fixedly connected to an acid addition tube. The rubber stopper is also vertical and sealably penetrated by a vent tube.

[0013] Preferably, a bracket is vertically fixed at the top center of the base, a second servo motor is fixed at the top of the bracket, a second connecting plate is fixed at the top of the output shaft of the second servo motor, and the bottom of the acid addition tube is fixed at the top of the second connecting plate.

[0014] The beneficial effects of this utility model are as follows: By using the base, emulsified acid preparation tank, acid tank, rubber stopper, emulsified acid stirring and preparation component, scraping component and acid uniform addition component in combination, the function of constant-rate dripping of acid into the stirred oil phase can be realized, replacing the traditional dripping funnel. This solves the problems of unstable dripping speed, poor batch repeatability and high operation risk of manual acid addition, significantly improving the stability, safety and reliability of experimental data of emulsified acid preparation. In addition, the inner surface of the emulsified acid preparation tank can be scraped and cleaned, effectively preventing adhesion during the preparation of emulsified acid. It has good practicality and is suitable for promotion. Attached Figure Description

[0015] Figure 1 A structural cross-sectional view provided for this utility model; Figure 2 for Figure 1 Enlarged view of the structure at point A in the image; Figure 3 The structural front view provided for this utility model; Figure 4 This is a schematic diagram of the structure provided by this utility model when the stirring paddle is removed from the emulsified acid preparation tank.

[0016] In the diagram: 1. Base; 2. Emulsified acid preparation tank; 3. Acid tank; 4. Rubber stopper; 5. Right-angle bracket; 6. Electric push rod; 7. First connecting plate; 8. Motor box; 9. Reducer; 10. First servo motor; 11. Stirring paddle; 12. U-shaped connecting plate; 13. U-shaped scraper; 14. Peristaltic pump; 15. Acid suction pipe; 16. Acid addition pipe; 17. Vent pipe; 18. Support; 19. Second servo motor; 20. Second connecting plate. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0018] Please refer to the appendix. Figures 1-4 This utility model provides a constant-speed emulsified acid preparation device for the petroleum industry, including a base 1, an emulsified acid preparation tank 2 placed on one side of the top of the base 1, and an acid tank 3 placed on the other side of the top of the base 1. It should be noted that threaded grooves (not marked in the figure) are opened on both sides of the top of the base 1. The bottom of the emulsified acid preparation tank 2 and the bottom of the acid tank 3 are respectively threaded and fixed inside the threaded grooves. A rubber plug 4 is embedded in the top of the acid tank 3. An emulsified acid stirring and preparation component is fixedly installed on the side of the top of the base 1 near the preparation tank 2. A scraping component for cleaning the inner surface of the emulsified acid preparation tank 2 is fixed on the emulsified acid stirring and preparation component. An acid uniform addition component is fixed in the middle of the top of the base 1. The emulsified acid stirring and preparation assembly includes a right-angle frame 5. The bottom end of the right-angle frame 5 is fixed to the rear side of the top of the base 1 near the preparation tank 2. An electric push rod 6 is vertically fixed to the top of the right-angle frame 5. A first connecting plate 7 is fixed to the bottom end of the output shaft of the electric push rod 6. A motor housing 8 is fixed to the bottom of the first connecting plate 7. A reducer 9 is vertically fixed to the bottom of the inner wall of the motor housing 8. The reducer is a transmission device used for low-speed, high-torque transmission. It reduces the speed of the high-speed motor by meshing a small gear on the input shaft with a large gear on the output shaft. A first servo motor 10 is vertically fixed to the top of the reducer 9. The output shaft of the reducer 10 is fixedly connected to the input shaft of the reducer 9. The bottom end of the output shaft of the reducer 9 passes vertically through the bottom of the motor housing 8. A stirring paddle 11 is fixed at the bottom end of the output shaft of the reducer 9. The stirring paddle 11 can be located inside the preparation tank 2. Specifically, under the deceleration action of the reducer 9, when the first servo motor 10 runs, it can drive the stirring paddle 11 to rotate slowly. When the electric push rod 6 runs, it can drive the stirring paddle 11 to move up and down through the first connecting plate 7. This can control the stirring paddle 11 to make a feeding motion relative to the emulsified acid preparation tank 2, so that the stirring paddle 11 can stir the oil phase and emulsifier added to the emulsified acid preparation tank 2. The scraping assembly includes a U-shaped connecting plate 12, which is fixed to the side and bottom of the stirring paddle 11. A U-shaped scraper 13 is fixed to the surface of the U-shaped connecting plate 12. When the stirring paddle 11 is located inside the preparation tank 2, the surface of the U-shaped scraper 13 is in contact with the inner surface of the preparation tank 2. Specifically, when the first servo motor 10 drives the stirring paddle 11 to stir the oil phase and emulsifier added to the emulsified acid preparation tank 2, the U-shaped connecting plate 12 can drive the U-shaped scraper 13 to rotate synchronously, so that the U-shaped scraper 13 can scrape and clean the inner surface of the emulsified acid preparation tank 2, effectively preventing adhesion during the preparation of emulsified acid. The acid uniform addition assembly includes a peristaltic pump 14. Peristaltic pumps are well-known to those skilled in the art and are widely available on the market. The bottom end of the peristaltic pump 14 is fixed to the middle of the top of the base 1. The inlet end of the peristaltic pump 14 is fixedly connected to an acid suction tube 15. The acid suction tube 15 is vertical and sealably penetrates the rubber stopper 4, and its bottom end extends to the bottom of the inner side of the acid tank 3. The outlet end of the peristaltic pump 14 is fixedly connected to an acid addition tube 16. The rubber stopper 4 is also vertical and sealably penetrates... Specifically, when the peristaltic pump 14 is running, the acid phase in the acid tank 3 can be drawn out through the acid suction pipe 15 and then discharged into the emulsified acid preparation tank 2 through the acid addition pipe 16. Under the action of the peristaltic pump 14, the function of adding acid at a constant rate to the stirred oil phase can be realized, replacing the traditional dripping funnel. This solves the problems of unstable speed, poor batch repeatability, and high operation risk of manual acid addition, and significantly improves the stability, safety and reliability of experimental data in the preparation of emulsified acid. A bracket 18 is vertically fixed at the top center of the base 1. A second servo motor 19 is fixed at the top of the bracket 18. A second connecting plate 20 is fixed at the top of the output shaft of the second servo motor 19. The bottom of the acid addition tube 16 is fixed at the top of the second connecting plate 20. Specifically, when the second servo motor 19 is running, it can drive the acid addition tube 16 to rotate in both directions through the second connecting plate 20. Therefore, when emulsified acid is being prepared, the acid addition tube 16 rotates to the upper side of the emulsified acid preparation tank 2. After the emulsified acid is prepared, the acid addition tube 16 rotates to the side of the emulsified acid preparation tank 2, thus not affecting the lifting and lowering of the stirring paddle 11 (e.g., Figure 4 (As shown).

[0019] It should be noted that the device is electrically connected to an external controller and 220V AC mains power. The controller can be an existing technology device such as a computer. In this utility model, the precise control principle of the first electric push rod 6 is to achieve motion conversion through the mechanical cooperation of the servo motor and the lead screw. The status is monitored in real time with the help of devices such as encoders. Finally, the controller dynamically adjusts the output according to the deviation, thereby achieving precise control of position, speed and force within the millimeter or even micrometer range.

[0020] The usage process of this utility model is as follows: When in use, the experimenter first screws the bottom threads of the emulsified acid preparation tank 2 and the acid tank 3 into the threaded slot opened on the top of the base 1. Then, by running the electric push rod 6, the stirring paddle 11 is moved down to the inside of the emulsified acid preparation tank 2. Then, the first servo motor 10 is started, and the oil phase and emulsifier are added into the emulsified acid preparation tank 2, so that the stirring paddle 11 stirs the oil phase and emulsifier added into the emulsified acid preparation tank 2. When the first servo motor 10 runs and drives the stirring paddle 11 to stir the oil phase and emulsifier added into the emulsified acid preparation tank 2, the U-shaped connecting plate 12 can drive the U-shaped scraper 13 to rotate synchronously, so that the U-shaped scraper 13 can scrape and clean the inner surface of the emulsified acid preparation tank 2, effectively preventing the adhesion during the preparation of emulsified acid. During the configuration process, the experimenter can also control the peristaltic pump 14. When the peristaltic pump 14 is running, the acid phase in the acid tank 3 can be extracted through the acid suction tube 15 and then discharged into the emulsified acid preparation tank 2 through the acid addition tube 16. Under the action of the peristaltic pump 14, the function of adding acid at a constant rate to the stirred oil phase can be realized, replacing the traditional dripping funnel. This solves the problems of unstable speed of manual acid addition, poor batch repeatability, and high operation risk, and significantly improves the stability, safety and reliability of experimental data in the preparation of emulsified acid.

[0021] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art can modify this utility model or modify it into an equivalent technical solution using the technical solution described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solution of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A constant-rate emulsified acid preparation device for petroleum industry, comprising a base (1), an emulsified acid preparation tank (2) placed on one side of the top of the base (1), an acid tank (3) placed on the other side of the top of the base (1), and a rubber stopper (4) embedded in the top of the acid tank (3), characterized in that: An emulsified acid stirring and preparation component is fixedly installed on the top of the base (1) near the preparation tank (2). A scraping component for cleaning the inner surface of the emulsified acid preparation tank (2) is fixed on the emulsified acid stirring and preparation component. An acid liquid uniform addition component is fixed in the middle of the top of the base (1).

2. The petroleum industry emulsified acid constant-rate preparation device according to claim 1, characterized in that: The emulsified acid stirring and preparation assembly includes a right-angle frame (5), the bottom of which is fixed to the rear side of the top of the base (1) near the preparation tank (2), and an electric push rod (6) is vertically fixed to the top of the right-angle frame (5). The bottom of the output shaft of the electric push rod (6) is fixed to a first connecting plate (7).

3. The petroleum industry emulsified acid constant-rate preparation device according to claim 2, characterized in that: The first connecting plate (7) has a motor housing (8) fixed at the bottom. A speed reducer (9) is vertically fixed at the bottom of the inner wall of the motor housing (8). A first servo motor (10) is vertically fixed at the top of the speed reducer (9). The output shaft of the first servo motor (10) is fixedly connected to the input shaft of the speed reducer (9). The bottom end of the output shaft of the speed reducer (9) passes vertically through the bottom of the motor housing (8).

4. The petroleum industry emulsified acid constant-rate preparation device according to claim 3, characterized in that: The bottom of the output shaft of the reducer (9) is fixed with a stirring paddle (11), which is located above the preparation tank (2).

5. The petroleum industry emulsified acid constant-rate preparation device according to claim 4, characterized in that: The scraping assembly includes a U-shaped connecting plate (12), which is fixed to the side and bottom of the stirring paddle (11), and a U-shaped scraper (13) is fixed on the surface of the U-shaped connecting plate (12).

6. The petroleum industry emulsified acid constant-rate preparation device according to claim 5, characterized in that: When the stirring paddle (11) is located inside the preparation tank (2), the surface of the U-shaped scraper (13) is in contact with the inner surface of the preparation tank (2).

7. The petroleum industry emulsified acid constant-rate preparation device according to claim 1, characterized in that: The acid uniform addition assembly includes a peristaltic pump (14), the bottom end of which is fixed at the middle of the top of the base (1). The inlet end of the peristaltic pump (14) is fixedly connected to an acid suction tube (15). The acid suction tube (15) is vertical and sealably penetrates the rubber stopper (4), and the bottom end of the acid suction tube (15) extends to the bottom of the inside of the acid tank (3). The outlet end of the peristaltic pump (14) is fixedly connected to an acid addition tube (16). The rubber stopper (4) is also vertical and sealably penetrated by a vent tube (17).

8. The petroleum industry emulsified acid constant-rate preparation device according to claim 7, characterized in that: A bracket (18) is vertically fixed at the top center of the base (1). A second servo motor (19) is fixed at the top of the bracket (18). A second connecting plate (20) is fixed at the top of the output shaft of the second servo motor (19). The bottom of the acid addition tube (16) is fixed at the top of the second connecting plate (20).

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