A device for efficiently generating and evaluating the performance of high-temperature and high-pressure foam fluid

Abstract

The present invention relates to a device for efficiently generating and evaluating the performance of a high-temperature and high-pressure foam fluid. The device is composed of a high-pressure reactor, a water bath thermostat, a porous hollow steel circular plate, a rotator, a multi-layer spiral steel wire mesh, a spring hinge, a vortex gas diffuser, an LED lamp, a valve, a screw pump, a pressure transmitter, a temperature transmitter, a liquid storage tank, a gas storage tank, a computer terminal and a data acquisition system. The device injects a foam base liquid and a gas into the reactor, and after sufficient contact to form foam, observes the foaming volume and half-life to measure the foaming and foam stability, and can also evaluate the oil resistance and salt resistance of the high-temperature and high-pressure foam. The porous hollow steel circular plate and the internal multi-layer spiral steel wire mesh can make the gas and liquid fully contact, and the foaming volume and half-life are measured by the scale line. After adding oil or inorganic salt to the foam base liquid, foam is generated to evaluate the oil resistance and salt resistance, thereby realizing the efficient generation of high-temperature and high-pressure foam fluid and the evaluation of oil resistance and salt resistance.

Description

Technical Field

[0001] The invention belongs to the field of foam fluid performance evaluation, and relates to a multifunctional device which can efficiently generate foam under high temperature and high pressure conditions and evaluate the performance of the foam. Background Art

[0002] As a porous film-like dispersion system, foam is widely used in oil drilling, profile control, water plugging and oil recovery. There are many reagents that can generate foam. At present, most of the foam base fluids are compounded with a variety of surfactants and polymer reagents. The foam properties of the compound system are still unknown, so it is very necessary to study the foaming and stability of foam under different conditions.

[0003] At present, the research on foaming property and stability mainly focuses on observing the foaming volume and half-life, which requires the foam to be generated as efficiently as possible. From the foam structure, it can be seen that it is mainly composed of liquid film enveloping gas. In order to generate as much foam as possible, it is necessary to think about how to make the gas and liquid collide and contact fully.

[0004] For the determination of foam volume and half-life, the foam base liquid is usually placed in a high-speed blender, and after stirring completely, it is poured into a container with a scale to read. However, foam is a thermodynamically unstable system, and it begins to decay from the moment it is produced. Environmental changes have a great impact on foam generation and stability. Therefore, it is very necessary to control the temperature and pressure of the measurement process and avoid evaporation. This requires trying to control the consistency of the environment before and after generation to ensure relative accuracy of observation. The study of foam generation and foam stability under a certain pressure is challenging. How to effectively control the stability of its pressure is the key to studying the effect of pressure on foam.

[0005] At the same time, when foam fluids are used in oil drilling, oil recovery, oil and gas migration, etc., the environment is usually extreme. High temperature, high mineralization and oil content will have a great impact on the generation and stability of foam. This requires studying the foam's oil, salt and temperature resistance to provide a medium with good performance.

[0006] Therefore, the present invention designs a device that can efficiently generate foam and evaluate performance under high temperature and high pressure, and can be used as an efficient foam generator for experimental research or field application. Summary of the invention

[0007] The purpose of the present invention is to provide a device that can efficiently generate foam and evaluate its performance under high temperature and high pressure conditions. The foam volume and half-life of the foam can be observed after the foam is generated, and its oil, salt and temperature resistance can also be evaluated and used as a highly efficient foam generation device.

[0008] To achieve the above functions, the technical method of the present invention is as follows:

[0009] A device for efficiently generating and evaluating the performance of high-temperature and high-pressure foam fluids. The device includes a high-pressure reactor, a water bath thermostat, a porous hollow steel circular plate, a rotator, a multi-layer spiral steel wire mesh, a spring hinge, a vortex gas diffuser, an LED lamp, a valve, a screw pump, a pressure transmitter, a temperature transmitter, a liquid storage tank, a gas storage tank, a computer terminal and a data acquisition system.

[0010] The side of the high-pressure reactor is divided into an outer wall, a water bath insulation layer and an inner wall. The inner and outer walls are compacted by the reactor cover. The water bath insulation layer is in the gap between the inner and outer walls. The outer wall has circular holes I and J. Circular hole I is the liquid inlet hole, and circular hole J is the liquid outlet hole. Both circular holes only penetrate the outer wall and are connected to the water bath thermostat. When the water bath thermostat is set to the required temperature, the temperature of the liquid in it will gradually change. Then turn on the circulation function, and the liquid begins to circulate between the water bath insulation layer and the water bath thermostat, thereby changing the temperature in the reactor. The outer wall is made of stainless steel and the inner wall is made of quartz. Both have high pressure bearing capacity. There is a scale line on the side of the reactor. There is only the inner wall at the scale line, and the interior of the high-pressure reactor can be observed. It is surrounded by stainless steel embedded in the outer wall and closed by the inner wall. There is only the inner wall at the symmetrical position of the scale line, and the foam volume at the scale line can be observed after irradiation with an LED light.

[0011] There is a rotator on the upper part of the upper lid of the high-pressure reactor. The rotator is relatively fixed to a porous hollow steel circular plate in the high-pressure reactor. The two are connected by an inner cylinder of a connecting column. The connecting column includes an inner cylinder and an outer ring. There is a certain gap between the inner cylinder and the outer ring for gas circulation. The outer side of the outer ring is welded and fixed to the center of the upper lid and the side of the rotator. The inner cylinder is connected to a bearing in the rotator upward and connected to the porous hollow steel circular plate downward. The three are relatively fixed, and the inner cylinder and the porous hollow steel circular plate can be driven to rotate by the bearing in the rotator; the porous hollow steel circular plate is divided into an inner circular plate and a fixed ring according to the circular surface, and a sealed rotatable connection is adopted at the interface. The outer side of the fixed ring is completely sealed and fixed to the inner wall of the reactor, and the liquid will not leak downward; there is a multi-layer spiral steel wire mesh inside the inner circular plate, and a plurality of circular holes H are passed through it. Spring locking devices are fixed beside the circular holes H on the bottom surface of the inner circular plate. The spring hinge is connected with the semicircular piece, and the semicircular piece is attached to the bottom of the small hole. The airflow in the porous hollow steel circular plate can push the semicircular piece downward, and it is closed when there is no airflow. There is a circular hole D on the top of the rotator, which is connected with the gas storage tank outward and the gap between the inner cylinder and the outer ring inward. There is a circular hole F at the middle and lower end of the gap. After the gas flows into the gap, it can be rushed into the vortex gas diffuser through the circular hole F and the circular hole E, and then rushed out through the circular holes G on the vortex gas diffuser. The vortex gas diffuser is directly above the porous hollow steel circular plate, and the two are relatively fixed. The circular holes G and the circular holes H are in the same vertical direction. The gas rushed out from the circular hole G can enter the porous hollow steel circular plate through the circular hole H. After the air pressure reaches a certain level, the semicircular piece connected with the spring hinge at the bottom of the porous hollow steel circular plate can be rushed open, and the vortex gas diffuser can rotate relatively statically with the porous hollow steel circular plate.

[0012] The uppermost circular hole C on the side of the water bath layer of the reactor is connected to the liquid storage tank. The foam base liquid can be injected into the reactor onto the porous hollow steel circular plate through a screw pump, and then flow into the porous hollow steel circular plate through the circular hole F; another circular hole B in the upper middle part of the side is used for exhaust to control the pressure in the reactor; the lowermost circular hole A on the side is flush with the upper end of the lower reactor cover and is used to discharge foam and base liquid.

[0013] The round holes are connected to each other and to the pump by means of hoses.

[0014] By using the high-temperature and high-pressure foam fluid efficient generation and performance evaluation device, foam can be efficiently generated and the foaming volume and half-life of the foam under high temperature and high pressure can be observed. At the same time, the oil and salt resistance of the foam can be evaluated and it can be used as an efficient foam generator. Before starting the measurement, the temperature of the water bath thermostat is set, and then the circulation function is turned on, and the insulation liquid circulates between the water bath thermostat and the water bath insulation layer. After opening the circular holes D and C, the foam base liquid and gas enter the high-pressure reactor at the same time. The foam base liquid enters the porous hollow steel circular plate through the circular hole F. The gas flows through the circular hole D on the rotator through the gap of the connecting column, and then flows to the circular hole F at the lower end of the connecting column, and enters the vortex gas diffuser through the circular hole E, and rushes from the multiple circular holes G at the bottom of the vortex gas diffuser to the circular hole H to enter the porous hollow steel circular plate; then open the rotator, the vortex gas diffuser and the porous hollow steel circular plate begin to rotate relatively fixedly, generating a swirl, and the gas and liquid fully contact in the multi-layer spiral steel wire mesh to generate a large amount of foam. After reaching a certain pressure, the semicircular piece on the spring hinge at the bottom of the inner circular plate is flushed open. After closing the valve C connected to the gas storage tank, the semicircular piece will automatically close under the tension of the spring hinge, and the foam will further fully collide and contact at a high flow rate, and the foam will fall evenly on the bottom of the high-pressure reactor. Then open the circular hole B to exhaust and stabilize the pressure at a certain value. After the foam base liquid is completely injected, when the foam is observed to no longer increase in the side groove, close the valve C connected to the rotator and the circular hole D, read the foaming volume according to the scale line, and record the time after the foam base liquid precipitates half of the injected amount, i.e. the half-life of the foam; if the oil and salt resistance of the foam under a certain pressure is evaluated, the oil and base liquid or the inorganic salt and base liquid can be mixed as the injection liquid, and the water bath insulation layer is set to a certain high temperature. After the same operation steps are performed, the foam volume and half-life of the foam can be observed and recorded, and the oil and salt resistance of the foam under a certain pressure can be evaluated. After the determination is completed, the foam is allowed to stand in the autoclave for a period of time, and after it is completely defoamed, the circular hole A is opened to completely discharge the foam base liquid. When there is no need to measure the foam properties and only a large amount of foam is obtained, the foam base liquid can be continuously added after opening the gas storage tank and the rotator, and then the circular hole A is opened to continuously discharge the generated foam from the circular hole A, and it can be used as an efficient foam generation device.

[0015] The present invention adopts the above technical solution and has the following advantages:

[0016] 1. Foam is a thermodynamically unstable system, which begins to decay from the moment it is generated. The generation of foam in a closed high-pressure reactor can slow down the coarsening and aggregation of the liquid film caused by environmental evaporation, temperature changes, etc. At the same time, the exhaust of the circular hole B can control the pressure in the reactor and accurately measure the foaming and stability of the foam under the temperature and pressure conditions of the work site.

[0017] 2. The multi-layer spiral steel wire mesh inside the porous hollow steel circular plate can dramatically increase the gas-liquid contact area, forming a large number of fine and uniform foams. At the same time, the porous hollow steel circular plate can act as a baffle, and the gas and liquid will also collide violently when falling to its bottom surface; the gas coming out of the vortex gas diffuser can evenly enter various positions of the circular plate, so that the gas and liquid can be fully in contact; there are multiple spring hinges at the bottom of the porous hollow steel circular plate, which are opened when there is airflow and closed when there is no airflow, which can ensure full contact between gas and liquid, and make the foam fall more evenly on the bottom of the high-pressure reactor.

[0018] 3. The device can also evaluate the oil and salt resistance of foam under high temperature and high pressure. After the oil and foam base liquid or inorganic salt and foam base liquid are mixed, the temperature of the water bath thermostat is adjusted to increase the temperature of the water bath insulation layer. After the same operation steps are performed, the foam volume and half-life are observed and recorded to obtain the effect of oil and inorganic salt on the foam volume under high temperature and high pressure. When there is no need to measure the foam properties and only to obtain a large amount of foam, the foam base liquid and gas can be continuously added, the device can be operated at the same time, the circular hole B is closed, and the generated foam is continuously discharged from the circular hole A under the impact of the airflow, and it can be used as an efficient foam generation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the overall plan view of the device;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the high-pressure reactor;

[0021] Figure 3 It is a cross-sectional view of the central axis of the high-pressure reactor;

[0022] Figure 4 It is a connection diagram of a spring hinge and a semicircular piece installed at the circular hole H on the bottom surface of a porous hollow steel circular plate;

[0023] Figure 5 The diagram is a connection diagram of the rotor and the porous hollow steel circular plate installed on the top of the reactor;

[0024] Figure 6 A diagram of a vortex gas diffuser located directly above a porous hollow steel circular plate and fixed relatively thereto;

[0025] Figure 7 A three-dimensional image of a multi-layer spiral wire mesh installed inside a porous hollow steel circular plate.

[0026] Among them: 1. High-pressure reactor; 2. Hole A; 3. Graduation mark; 4. Hole B; 5. Hole C; 6. Rotator; 7. Hole D; 8. Outer ring; 9. Inner cylinder; 10. Vortex gas diffuser; 11. Hole E on the vortex gas diffuser; 12. Multi-layer spiral steel wire mesh; 13. Groove on the side of the reactor; 14. Spring hinge; 15. Semicircular sheet; 16. The inner and outer circular plates on the porous hollow steel circular plate The seamless connection of the ring; 17. Circular hole F; 18. Connecting column; 19. vortex gas diffuser air inlet circular hole G; 20. Circular hole H; 21. Computer terminal and data acquisition and analysis equipment; 22. Gas storage tank; 23. Screw pump; 24. Liquid storage tank; 25. LED light; 26. Valve A; 27. Valve B; 28. Valve C; 29. ​​Valve D; 30. Circular hole I; 31. Circular hole J; 32. Water bath thermostat. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] The device of the present invention relates to a high-temperature and high-pressure foam fluid efficient generation and performance evaluation device. The device is composed of a high-pressure reactor, a water bath thermostat, a porous hollow steel circular plate, a rotator, a multi-layer spiral steel wire mesh, a spring hinge, a vortex gas diffuser, an LED lamp, a valve, a screw pump, a pressure transmitter, a temperature transmitter, a liquid storage tank, a gas storage tank, a computer terminal and a data acquisition system. As shown in Figures (2) and (3), the upper cover of the high-pressure reactor (1) is sealed by a heat-resistant silicone rubber sealing ring, and the upper and lower covers are compacted by screws to prevent gas from leaking out; the upper part of the upper cover is a rotator (6), and the lower side of the rotator is a connecting column, which includes an inner cylinder (9) and an outer ring (8). There is a certain gap between the inner cylinder and the outer ring, which allows gas to flow into the porous hollow steel circular plate, as shown in Figure (5); the outer side of the outer ring is welded and fixed to the center of the upper cover of the high-pressure reactor and cannot rotate. There is a bearing in the rotator, and the inner cylinder is connected to the bearing in the rotator upward and connected to the porous hollow steel circular plate downward. The three are relatively fixed, and the rotator can drive the inner cylinder and the porous hollow steel circular plate to rotate. The inner cylinder is connected to a temperature transmitter and a pressure transmitter, which are connected to a computer terminal and a data acquisition and analysis device (21) to measure the pressure and temperature in the reactor in real time. The circular hole C (5) is connected to the liquid storage tank (24). By opening the valve B (27) and the screw pump (23), the foam base liquid in the liquid storage tank (24) can be injected into the autoclave. The side surface of the high-pressure reactor is divided into an outer wall surface, a water bath insulation layer and an inner wall surface. The inner and outer wall surfaces are compacted by the autoclave cover. The water bath insulation layer is in the gap between the inner and outer wall surfaces. The outer wall surface is provided with a circular hole I (30) and a circular hole J (31) one below and one above. The circular hole I is a liquid inlet hole and the circular hole J is a liquid outlet hole. Both circular holes penetrate only the outer wall surface and are connected to a water bath thermostat (32) to the outside. When the water bath thermostat is set to a desired temperature, the temperature of the liquid contained therein will gradually change. When the circulation function is turned on, the liquid begins to circulate between the water bath insulation layer and the water bath thermostat, thereby changing the temperature in the autoclave. The outer wall is made of stainless steel, and the inner wall is made of quartz, and both the inner and outer sides have a high pressure bearing capacity; at the same time, there is a scale line (3) on the side of the reactor, and there is only the inner wall at the scale line, so that the foaming height of the foam in the high-pressure reactor can be observed, and the stainless steel on the outer wall is embedded in the periphery to achieve seamless contact with the inner wall to achieve sealing; there is only the inner wall at the symmetrical position of the scale line, and the foaming height can be read more easily after being illuminated by an LED light (25), and the stainless steel on the outer wall is also embedded in the periphery to achieve seamless contact with the inner wall to achieve sealing.The porous hollow steel circular plate connected to the inner cylinder is divided into an inner circular plate and a fixed ring. The connection (16) between the inner circular plate and the fixed ring is sealed. The inner circular plate can rotate with the inner cylinder. The fixed ring and the inner wall of the high-pressure reactor are completely sealed and fixed, and the liquid will not leak downward. There are multiple circular holes H (20) passing through the inner circular plate. Spring hinges (14) are fixed next to the circular holes H on the bottom surface of the inner circular plate. The spring hinges are connected to the semicircular pieces (15). The semicircular pieces are on the lower side of the circular holes H of the inner circular plate, as shown in Figure (4); Under the elastic force of the spring hinge, when there is no gas circulation, the semicircular sheet seals the circular hole H on the bottom surface of the inner circular plate. Under the impact of the airflow, the semicircular sheet will flip downward. The circular hole A (2) is at the lowest part of the side of the high-pressure reactor, at the same height as the uppermost end of the lower reactor cover, and can effectively discharge the foam and foam base liquid in the reactor under a certain pressure. The vortex gas diffuser is shown in FIG. (6), which is a vortex-shaped circular tube. There are multiple circular holes G (19) on one side of the vortex surface. The circular holes face downward and are used to disperse the gas. The circular holes F ( 17) is connected to the gas inlet hole E (11) of the vortex gas diffuser, and the hole F leads upward to the gap of the connecting column and communicates with the gas injection hole D (7) on the rotator (6). The hole D is connected to the gas storage tank (22) outward. After the valve C (28) is opened, the gas flows through the gas storage tank to the hole D, and then from the hole D through the gap of the connecting column, and flows from the hole F at the lower end of the connecting column to the hole E on the vortex gas diffuser. The vortex gas diffuser is directly above the porous hollow steel circular plate and fixed relatively to it. The two can rotate relatively still. The multiple circular holes G (19) on the lower side of the vortex gas diffuser are vertically connected with the circular holes H (20) of the porous hollow steel circular plate. The gas can rush from the circular holes G to the circular holes H, thereby entering the porous hollow steel circular plate. The porous hollow steel circular plate is equipped with a multi-layer spiral steel wire mesh. The multi-layer spiral steel wire mesh is shown in Figure (7). It is composed of multiple layers of dense spiral steel wire mesh stacked and fixed to increase the gas-liquid contact area. The valve D (29) is used to control the discharge of the gas in the high-pressure reactor.

[0029] When in use, first set the temperature of the water bath thermostat, then turn on the circulation function, and the insulation liquid circulates between the water bath thermostat and the water bath insulation layer. When the temperature of the high-pressure reactor reaches the required level, open valve C (28), and the gas flows out of the gas storage tank (22), enters the gap of the connecting column through the circular hole D (7), flows from the circular hole F (17) to the vortex gas diffuser (10), and then flows downward from the circular hole G (19) through the circular hole H (20) to the porous hollow steel circular plate; open valve B (27) and the screw pump (23), the foam base liquid is injected into the reactor from the circular hole C (5), and flows into the porous hollow steel circular plate through the circular hole H (20); the rotator (6) is turned on, the porous hollow steel circular plate and the vortex gas diffuser rotate relatively statically, the airflow rotates, and at the same time, under the action of the multi-layer spiral steel wire mesh in the porous hollow steel circular plate, the gas and the foam base liquid fully collide and contact, and at the same time, under the impact of the gas, the semicircular piece (15) connected by the spring hinge (14) opens, and the foam falls evenly to the bottom of the high-pressure reactor. After the liquid in the liquid storage tank (24) is completely pumped out by the screw pump (23), the rotator (6), the gas storage tank (22) and the valve C (28) are closed, and then the valve D (29) is opened to discharge the gas in the high-pressure reactor. Read the foaming volume according to the scale line (3), and record the foam half-life after the foam volume is reduced by half; if the effect of pressure on the foaming and foam stabilization performance is studied, the circular hole B (4) can be adjusted to a certain opening to control the pressure at a certain value, and the foaming and foam stabilization of the foam under a certain pressure can be explored; if the oil resistance, salt resistance and temperature resistance of the foam are evaluated, the oil and foam base liquid or the inorganic salt and the foam base liquid can be mixed, and the water bath thermostat can be set to a certain high temperature. After the same operation steps are performed, the foam foaming volume and half-life are observed and recorded, and the oil resistance, salt resistance and temperature resistance of the foam can be evaluated. After the measurement is completed, the foam is left to stand in the high-pressure reactor for a period of time. After it is completely defoamed, the gas storage tank (22) and valve C (28) are continued to be opened, and then the valve A (26) of the circular hole A (2) is opened, and the air pressure can completely discharge the foam and the base liquid. When there is no need to measure the foam properties and only a large amount of foam is desired, the foam base liquid and gas can be continuously added while the device is operated to continuously discharge the generated foam from the circular hole A (2), thereby using the device as an efficient foam generating device.

Claims

1. A high-temperature and high-pressure foam fluid efficient generation and performance evaluation device, which uses a method of increasing the gas-liquid contact area under high temperature and high pressure to efficiently generate foam, and can also evaluate the oil and salt resistance of the foam, characterized by: The device comprises a high-pressure reactor, a water bath thermostat, a porous hollow steel circular plate, a rotator, a multi-layer spiral steel wire mesh, a spring hinge, a vortex gas diffuser, an LED lamp, a valve, a screw pump, a pressure transmitter, a temperature transmitter, a liquid storage tank, a gas storage tank, a computer terminal and a data acquisition system; the upper lid of the high-pressure reactor (1) is sealed by a heat-resistant silicone rubber sealing ring, and the upper and lower lids are compacted by screws to prevent gas from leaking; the upper part of the upper lid is a rotator (6), and the lower side of the rotator is a connecting column, which includes an inner cylinder (9) and an outer ring (8), and there is a certain gap between the inner cylinder and the outer ring to allow gas to flow into the porous hollow steel circular plate; the outer side of the outer ring is welded and fixed to the center of the upper lid of the high-pressure reactor and cannot rotate, and there is a bearing in the rotator. The inner cylinder is connected to the bearing in the rotator upward and to the porous hollow steel plate downward. The three are relatively fixed and can be driven by the rotator to rotate the inner cylinder and the porous hollow steel plate. The inner cylinder is connected to a temperature transmitter and a pressure transmitter, which are connected to a computer terminal and a data acquisition and analysis device (21) to measure the pressure and temperature in the reactor in real time. The circular hole C (5) is connected to a liquid storage tank (24). By opening valve B (27) and a screw pump (23), the foam base liquid in the liquid storage tank (24) can be injected into the reactor. The side surface of the high-pressure reactor is divided into an outer wall surface, a water bath insulation layer and an inner wall surface. The inner and outer wall surfaces are compacted by the reactor cover from top to bottom. The water bath insulation layer is in the gap between the inner and outer wall surfaces. The outer wall surface is provided with a circular hole I (30) and a circular hole J (31) at the bottom and top. The circular hole I is for inlet. The circular hole J is the liquid outlet hole. Both circular holes penetrate only the outer wall and are connected to the water bath thermostat (32). When the water bath thermostat is set to the required temperature, the temperature of the liquid contained therein will gradually change. When the circulation function is turned on, the liquid begins to circulate between the water bath insulation layer and the water bath thermostat, thereby changing the temperature inside the reactor. The outer wall is made of stainless steel and the inner wall is made of quartz. Both the inner and outer walls have a high pressure bearing capacity. At the same time, there is a scale line (3) on the side of the reactor. There is only the inner wall at the scale line, and the foaming height of the foam in the high-pressure reactor can be observed. The stainless steel on the outer wall is embedded in the periphery until it is in seamless contact with the inner wall to achieve sealing. There is only the inner wall at the symmetrical position of the scale line, and it is easier to read the start and end after being illuminated by the LED light (25). The bubble height is 1.5mm, and the surroundings are also made of stainless steel embedded in the outer wall surface until they are in seamless contact with the inner wall surface to achieve sealing; the porous hollow steel circular plate connected to the inner cylinder is divided into an inner circular plate and a fixed ring, and the connection (16) between the inner circular plate and the fixed ring is sealed, and the inner circular plate can rotate with the inner cylinder, and the fixed ring is completely sealed and fixed to the inner wall surface of the high-pressure reactor, so that the liquid will not leak downwards, and there are multiple circular holes H (20) passing through the inner circular plate, and spring hinges (14) are fixed beside the circular holes H on the lower bottom surface of the inner circular plate, and the spring hinges are connected to the semicircular sheet (15), and the semicircular sheet is on the lower side of the circular hole H of the inner circular plate; under the elastic force of the spring hinge, when there is no gas circulation, the semicircular sheet seals the circular hole H on the bottom surface of the inner circular plate, and under the impact of the airflow, the semicircular sheet will flip downwards;The circular hole A (2) is located at the lowest part of the side of the high-pressure reactor and is at the same height as the upper end of the lower reactor cover. It can effectively discharge the foam and foam base liquid in the reactor under a certain pressure. The vortex gas diffuser is a vortex-shaped circular tube. One side of the vortex surface has a plurality of circular holes G (19), which face downward and are used to disperse the gas. The circular hole F (17) on the connecting column is connected to the gas inlet circular hole E (11) of the vortex gas diffuser, and the circular hole F leads upward to the gap of the connecting column and communicates with the gas injection circular hole D (7) on the rotator (6). The circular hole D is connected to the gas storage tank (22) outwardly. After the valve C (28) is opened, the gas flows through the gas storage tank to the circular hole D, and then flows from the circular hole D through the gap of the connecting column. The gas flows from the circular hole F at the lower end of the connecting column to the circular hole E on the vortex gas diffuser. The vortex gas diffuser is located directly above the porous hollow steel circular plate and fixed relative to it. The two can rotate relatively statically. The multiple circular holes G (19) at the lower side of the vortex gas diffuser are vertically connected to the circular hole H (20) of the porous hollow steel circular plate. The gas can rush from the circular hole G to the circular hole H, thereby entering the porous hollow steel circular plate. The porous hollow steel circular plate is equipped with a multi-layer spiral steel wire mesh (12). The multi-layer spiral steel wire mesh is stacked and fixed by multiple layers of dense spiral steel wire mesh to increase the gas-liquid contact area. The valve D (29) is used to control the discharge of the gas in the high-pressure reactor. ; 2. A high-efficiency generation and performance evaluation device for high-temperature and high-pressure foam fluid according to claim 1, characterized in that: When in use, first set the temperature of the water bath thermostat, then turn on the circulation function, and the insulation liquid circulates between the water bath thermostat and the water bath insulation layer. When the temperature of the high-pressure reactor reaches the required level, open valve C (28), and the gas flows out of the gas storage tank (22), enters the gap of the connecting column through the circular hole D (7), flows from the circular hole F (17) to the vortex gas diffuser (10), and then flows downward from the circular hole G (19) through the circular hole H (20) to the porous hollow steel circular plate; open valve B (27) and the screw pump (23), The foam base liquid is injected into the reactor through the circular hole C (5) and flows into the porous hollow steel circular plate through the circular hole H (20); the rotator (6) is turned on, the porous hollow steel circular plate and the vortex gas diffuser rotate relatively statically, the airflow rotates, and at the same time, under the action of the multi-layer spiral steel wire mesh in the porous hollow steel circular plate, the gas and the foam base liquid fully collide and contact, and at the same time, under the impact of the gas, the semicircular piece (15) connected by the spring hinge (14) opens, and the foam falls evenly to the bottom of the high-pressure reactor; the liquid in the liquid storage tank (24) After being completely pumped out by the screw pump (23), the rotor (6), the gas storage tank (22) and the valve C (28) are closed, and then the valve D (29) is opened to discharge the gas in the autoclave; the foaming volume is read according to the scale line (3), and after the foam volume is reduced by half, the foam half-life is recorded; if the effect of pressure on the foaming and foam stabilization performance is to be studied, the circular hole B (4) can be adjusted to a certain opening to control the pressure at a certain value, so that the foaming and foam stabilization performance of the foam under a certain pressure can be studied; if the durability of the foam is to be evaluated, the foaming and foam stabilization performance of the foam can be studied; The oil resistance, salt resistance and temperature resistance of the foam can be evaluated by mixing oil with a foam base liquid or an inorganic salt with a foam base liquid, setting a water bath thermostat to a certain high temperature, and performing the same operation steps. Then, the foam volume and half-life are observed and recorded, and the oil resistance, salt resistance and temperature resistance of the foam can be evaluated. After the determination is completed, the foam is allowed to stand in a high-pressure reactor for a period of time. After it is completely defoamed, the gas storage tank (22) and valve C (28) are opened, and then the valve A (26) of the circular hole A (2) is opened. The air pressure can completely discharge the foam and the base liquid.

3. The device for efficiently generating and evaluating the performance of high-temperature and high-pressure foam fluid according to claim 1 is characterized in that: When the gas and liquid flow into the multi-layer spiral steel wire mesh in the porous hollow steel circular plate, the contact area increases sharply. At the same time, under the relatively static rotation of the porous circular plate and the vortex gas diffuser, the gas generates a swirl flow and fully contacts with the base liquid, so that foam can be efficiently generated. Under the impact of the airflow, the semicircular sheet (15) is opened, and the semicircular sheet is closed without airflow, which can prevent the foam base liquid from falling to the bottom of the kettle before forming foam, and at the same time, the foam can be evenly dropped at various places on the bottom of the reactor.

4. The device for efficiently generating and evaluating the performance of high-temperature and high-pressure foam fluid according to claim 1 is characterized in that: The water bath thermostat (32) is adjusted to a certain high temperature. After the temperature in the high-pressure reactor reaches the required temperature, the valve C (28) is opened, and the gas enters the high-pressure reactor through the circular hole D (7). Then, the crude oil and the foam base liquid or the inorganic salt and the foam base liquid are fully mixed and injected through the circular hole C (5). The rotor (6) is turned on to allow the gas and liquid to fully contact to generate foam. The foaming volume and half-life are observed to evaluate the oil and salt resistance of the high-temperature and high-pressure foam.

5. The device for efficiently generating and evaluating the performance of high-temperature and high-pressure foam fluid according to claim 1 is characterized in that: When there is no need to measure the foam properties and only a large amount of foam is desired, the foam base liquid and gas can be continuously added while the device is operated to continuously discharge the generated foam from the circular hole A (2), thereby using the device as an efficient foam generating device.

Images