High-pressure foam drainage characteristic, microstructure and pipe flow characteristic observation device

Abstract

The utility model relates to a high-pressure foam drainage characteristic, microstructure and pipe flow characteristic observation device. The device consists of a high-pressure reaction kettle, a sensor fixing shaft, a rotator, a searchlight, a microscopic camera, a square groove, a T-shaped neodymium iron boron magnet, a circular plate, a magnet column, a rotor, an LED lamp, a valve, a tee joint, a hose, a high-pressure reaction kettle bracket, a screw pump, a pressure sensor, a temperature sensor, a liquid storage tank, a gas cylinder, a computer terminal and data acquisition and analysis equipment. According to the device, foam base liquid and gas are injected into the high-pressure reaction kettle and are in full contact to form foam, and then the drainage characteristic, the microstructure and the pipe flow characteristic are observed. Wherein the microscopic camera A can be used for observing a foam microstructure, the microscopic camera B can be used for observing pipe flow characteristics, and the drainage amount can be read through scales outside the high-pressure reaction kettle, so that synchronous observation of drainage characteristics, the microstructure and the pipe flow characteristics is realized.

Description

Technical Field

[0001] The utility model belongs to the field of foam performance research and relates to a device capable of observing the liquid separation characteristics, microstructure and pipe flow characteristics of foam fluid. Background Art

[0002] As a thermodynamically unstable system, the structure of foam changes over time. In order to reduce liquid precipitation and improve stability, most foam systems are compounded with a variety of surfactants and polymer reagents. The microstructure and liquid precipitation laws of different compound systems are different, which need further study.

[0003] At present, the research on the liquid separation characteristics of foam systems mainly uses a high-speed mixer to pour the generated foam into a graduated cylinder to read the liquid separation amount. However, a series of operations such as high-speed shearing and pouring will inevitably affect the foam structure, causing the static liquid separation law to change. Therefore, it is necessary to ensure the structural stability before foam observation.

[0004] When foam is used in the oil field, such as underbalanced drilling and low-density perforating, the environment is usually extreme. High temperature and high pressure have a great influence on the structure of the foam. It is necessary to study the influence of extreme temperature and pressure conditions on the microstructure and fluid separation characteristics of various foams.

[0005] At the same time, when studying the pipe flow characteristics of foam, a larger site and a large amount of foam are usually required. However, the larger the site, the more difficult it is to keep the temperature and flow stable. Therefore, it is proposed to study the pipe flow characteristics of foam in a high-pressure reactor, which can not only ensure the relative stability of temperature and pressure, but also recycle the foam. Summary of the invention

[0006] The utility model aims to provide a device for observing the liquid separation characteristics, microstructure and pipe flow characteristics of a foam fluid, so as to observe the liquid separation law, microstructure and pipe flow characteristics of the foam fluid after the foam is efficiently generated.

[0007] To achieve the above functions, the technical method of the utility model is as follows:

[0008] A device for observing the characteristics of foam fluid separation, microstructure and pipe flow. The device includes a high-pressure reactor, a sensor fixing shaft, a rotator, a searchlight, a microscopic camera, a square groove, a T-shaped NdFeB magnet, a round plate, a magnet column, a rotor, an LED lamp, a valve, a tee, a hose, a high-pressure reactor bracket, a screw pump, a pressure sensor, a temperature sensor, a liquid storage tank, a gas tank, a computer terminal and data acquisition and analysis equipment.

[0009] The high-pressure reactor is sealed at the top and bottom and compacted by screws to prevent gas leakage. The center of the upper reactor cover is welded and fixed to the sensor fixing shaft. The sensor fixing shaft contains a temperature sensor and a pressure sensor. The two sensors are connected to the computer terminal and data acquisition and analysis equipment outwardly. The lower sensor end extends into the reactor to measure the pressure and temperature in the reactor in real time.

[0010] Two large grooves are symmetrically opened on the side of the reactor. The walls of the two grooves are made of quartz glass, so the situation inside the reactor can be clearly observed. The water bath insulation layer can control the temperature by connecting the reactor to a constant temperature water bath box. The outer and inner walls are made of stainless steel.

[0011] The side of the reactor consists of two layers, an inner layer and an outer layer, both of which are made of stainless steel, with a water bath insulation layer between the two layers. There are scale lines on the groove on one side of the reactor, and an LED light is placed outside the groove on the symmetrical surface. After turning on the light, the foam volume and the amount of liquid separation can be read through the scale lines; a small groove is opened on the groove on one side of the scale line to hold the T-shaped NdFeB magnet. The inner magnet and the two directly connected microscopic cameras and the square groove are in the reactor. The two magnets are attracted to each other, one inside and one outside, and are relatively fixed. The magnet can move up and down in the small groove. The screw is inserted through the circular hole A on the outer T-shaped NdFeB magnet to connect it to the circular hole B on the side of the groove to fix it, thereby realizing the relatively fixed up and down movement of the microscopic camera and the square groove in the reactor; inside the high-pressure reactor A circular tube is passed across, and the two ends of the circular tube respectively penetrate the circular hole C and the circular hole D on the side of the high-pressure reactor. The circular hole C leads to the circular hole E outwardly, and the circular hole D is connected to the valve and the screw pump outwardly, and then leads to a tee, and the tee leads to the high-pressure reactor through the circular hole F; the microscope camera A faces downward and can fully capture the square groove, and the microscope camera B faces sideways and is at the same height as the circular tube in the high-pressure reactor, so that the side of the circular tube can be fully captured; the bottom surface of the square groove is slightly inclined, and circular holes I are symmetrically opened on the left and right sides close to the wall of the high-pressure reactor, which can allow the solution after the foam in the groove is defoamed to flow out from the circular hole I without affecting the next observation.

[0012] A rotator (rotatable after power is supplied) is connected to the bottom center of the reactor bottom surface. The rotator is connected to a magnet column. A cylindrical ring is wrapped around the magnet column. The cylindrical ring is used to be welded and fixed to the bottom surface of the reactor. The magnet column contacts the center of a circular plate upward. The circular plate is made of quartz. There is a rotor on the upper side of the circular plate. There is also a magnet inside the rotor. The circular plate and the magnet column are attracted to each other. The rotation of the rotator can drive the rotor to rotate, ensuring that the gas and liquid are fully in contact to produce foam. The circular plate is seamlessly connected to the side of the reactor, and the liquid will not penetrate through the circular plate to the bottom of the reactor.

[0013] A circular hole H at the top of the side of the water bath layer of the reactor is connected to the liquid storage tank, and the foam base liquid can be injected into the reactor through a screw pump; the circular hole G is used for discharging the foam liquid.

[0014] A searchlight for lighting is installed on the inner side of the reactor top cover. When turned on, it can completely illuminate the reactor, making the shooting effect of the microscope camera better. The microscope camera is connected to the computer terminal and can record the microscopic structure of the foam in the square groove at any time.

[0015] The round holes are connected to each other and to the pump by means of hoses.

[0016] By using the observation device for the liquid separation characteristics, microstructure and pipe flow characteristics of a high-pressure foam fluid, the foaming volume, liquid separation amount, microstructure and pipe flow characteristics can be observed after efficient foaming. Set the water bath insulation layer to the test temperature, open valve A and screw pump A, and after the foam base liquid enters the high-pressure reactor from the circular hole H, open the gas cylinder, valve E and valve B, close valve D, and the gas enters the high-pressure reactor through the circular hole F. Turn on the rotator, the magnet column starts to rotate, and the rotor follows the rotation. The gas-liquid contact produces foam. After the foam is observed to be completely generated in the side groove and the pressure sensor observes that the pressure reaches the test requirements, close the gas cylinder, valve B and rotator, and record the change in liquid separation amount at a certain time interval. Pull the T-type NdFeB magnet down into the foam, wait for the square groove to be loaded with foam, and then pull it up, and observe the change of the microstructure of the foam under high temperature and high pressure over time through the microscopic camera A. Thereafter, open valve D and screw pump B, and the foam is pumped into the circular tube from the circular hole D. The microscopic camera B can observe the pipe flow characteristics of the foam fluid in the circular tube. After the foam flows through the circular tube, it flows out from the circular hole C, and then flows through the hose and flows into the circular plate in the high-pressure reactor from the circular hole E, thereby realizing the circulation of the foam. After the measurement is completed, the liquid storage tank is filled with water, the screw pump A and valve A are turned on, and water is pumped into the high-pressure reactor to discharge the foam, and the high-pressure reactor is cleaned at the same time.

[0017] The utility model adopts the above technical solution and has the following advantages:

[0018] 1. As a porous membrane dispersion system, the structure of foam is changing all the time. The temperature and pressure in the closed reactor are controllable and stable, which can slow down the change of foam caused by changes in the external environment;

[0019] 2. When using a high-speed agitator to generate foam, the upper foam may be uneven in size with the lower foam due to insufficient stirring. Using a rotor to generate foam can create a vortex in the base liquid, increase the gas-liquid contact area, and generate finer and more uniform foam.

[0020] 3. The T-shaped NdFeB magnet in the reactor is relatively fixed to the microscopic camera and the square groove, and the microscopic camera and the square groove can be moved up and down stably to observe the formation of the foam structure, and the temperature and other factors do not change, and the initial formation state can be maintained to the greatest extent; the T-shaped NdFeB magnet and the square groove are at the same height, so that the microscopic camera will not be affected by contact with the foam and affect the observation of the foam; the bottom surface of the square groove is an inclined surface, and there are symmetrical circular holes I near the wall of the reactor, which can effectively discharge the foam after defoaming, and will not affect the next observation;

[0021] 4. Observing the flow characteristics of foam in the circular tube in the high-pressure reactor can ensure temperature stability, reduce site usage and allow the foam to be recycled. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the overall plan view of the device;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the high-pressure reactor;

[0024] Figure 3 It is a cross-sectional view of the central axis of the high-pressure reactor;

[0025] Figure 4 It is the sensor fixed axis diagram;

[0026] Figure 5 This is a diagram of the connection between the T-shaped NdFeB magnet, the microscope camera and the square groove;

[0027] Figure 6 This is a connection diagram of the rotor, circular plate, magnet column and rotator at the bottom of the reactor;

[0028] Figure 7 A diagram of a circular tube running through a high-pressure reactor.

[0029] Wherein: (1) high pressure reactor; (2) circular hole H; (3) circular hole G; (4) circular hole B; (5) scale mark; (6) T-type NdFeB magnet moving groove; (7) sensor fixing shaft; (8) temperature sensor; (9) pressure sensor; (10) T-type NdFeB magnet; (11) microscopic camera A; (12) square groove; (13) microscopic camera B; (14) rotor; (15) circular hole I; (16) circular hole F; (17) magnet column; (18) rotator; (1 9), circular hole D; (20), circular hole C; (21), circular hole E; (22), cylindrical ring; (23), symmetrical surface groove; (24), computer terminal and data acquisition and analysis equipment; (25), screw pump A; (26), liquid storage tank; (27), tee; (28), gas cylinder; (29), screw pump B; (30), valve A; (31), valve B; (32), valve D; (33), valve E; (34), high-pressure reactor bracket; (35), LED lamp; (36), hose; (37), circular hole A. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings.

[0031] The device of the present invention relates to a foam efficient generation and viscosity, performance and structural state observation device. The device comprises a high-pressure reactor, a sensor fixed shaft, a rotator, a searchlight, a microscopic camera, a square groove, a T-shaped NdFeB magnet, a round plate, a magnet column, a rotor, an LED lamp, a valve, a tee, a hose, a high-pressure reactor bracket, a screw pump, a pressure sensor, a temperature sensor, a liquid storage tank, a gas tank, a computer terminal and a data acquisition and analysis device. As shown in Figures (2) and (3), the high-pressure reactor (1) is sealed from top to bottom and compacted by screws so that gas will not leak out; the center of the upper reactor cover is welded and fixed to the sensor fixed shaft, and a temperature sensor (8) and a pressure sensor (9) are arranged in the sensor fixed shaft. As shown in Figure (4), the two sensors are connected to the computer terminal and the data acquisition and analysis device (24) outwardly, and the lower sensing end extends into the reactor to measure the pressure and temperature in the reactor in real time. The side of the high-pressure reactor includes an inner and outer layer, both of which are made of stainless steel, and a water bath insulation layer is provided between the two layers. There is a scale line (5) on the groove on one side of the reactor, and an LED lamp (35) is placed outside the groove (23) on the symmetrical surface. After turning on the LED lamp, the foam volume and the liquid precipitation amount can be read through the scale line; a T-shaped NdFeB magnet moving groove (6) is opened on the groove on one side of the scale line to clamp the T-shaped NdFeB magnet (10). The inner T-shaped NdFeB magnet and the microscopic camera A (11), microscopic camera B (13) and square groove (12) directly connected thereto are in the high-pressure reactor. The two T-shaped NdFeB magnets are attracted to each other, one inside and one outside, and are relatively fixed. The T-shaped NdFeB magnet can move up and down. The screw is inserted into the circular hole A (37) on the outer T-shaped NdFeB magnet to connect it with the circular hole B (4) on the side of the groove to fix it, thereby realizing the relatively fixed up and down movement of the microscopic camera and the square groove in the reactor; a round tube is passed through the high-pressure reactor, as shown in Figure (7), and the two ends of the round tube respectively penetrate the circular hole A (37) on the side of the high-pressure reactor. The circular hole C (20) and the circular hole D (19) are connected to the circular hole E (21) through a hose (36). The circular hole D is connected to the valve E (33), the screw pump B (29) and the valve D (32) and then to a tee (27). The tee leads to the high-pressure reactor through the circular hole F (16). The microscopic camera A (11) faces downward and can fully capture the square groove (12). The microscopic camera B (13) faces sideways and is aligned with the high-pressure reactor. The circular tubes in the reactor are at the same height, so that the side of the circular tubes can be fully photographed; the square groove is symmetrically opened with circular holes I (15) on the left and right sides of one side of the wall of the high-pressure reactor, and the solution in the groove can flow out from the circular holes I without affecting the next observation; a rotator (18) is connected below the center of the bottom surface of the high-pressure reactor, which can rotate after power is turned on, and the rotator is connected to a magnet column (17), and a cylindrical ring (22) is wrapped outside the magnet column, and the cylindrical ring is used to be welded and fixed to the bottom surface of the reactor.The magnet column contacts the center of a circular plate upwards. The circular plate is made of quartz. There is a rotor (14) on the upper side of the circular plate. There is also a magnet inside the rotor. The circular plate and the magnet column are attracted to each other. The rotation of the rotor can drive the rotor to rotate, ensuring that the gas and liquid are fully in contact to generate foam. The circular plate is seamlessly connected to the side of the reactor, and the liquid will not penetrate through the circular plate to the bottom of the reactor. A circular hole H (2) at the top end of the side of the water bath layer of the reactor is connected to the liquid storage tank (26) to the outside. The screw pump A (25) can be turned on to inject the base liquid into the reactor; the circular hole G (3) is used to discharge the foam liquid; a searchlight for lighting is installed on the inner side of the reactor top cover. When turned on, it can completely illuminate the reactor, so that the microscopic camera can shoot better. The microscopic camera is connected to the computer terminal and can always shoot and record the microscopic structure of the foam in the square groove and the flow law of the foam in the round tube.

[0032] When in use, the water bath insulation layer is set to the test temperature, valve A (30) and screw pump A (25) are opened, and the foam base liquid in the liquid storage tank (26) enters the high-pressure reactor from the circular hole H (2), and then the gas cylinder (28), valve E (33) and valve B (31) are opened, and valve D (32) is closed, and the gas enters the high-pressure reactor through the circular hole F (16), and the rotator (18) is opened, and the magnet column (17) starts to rotate, and the rotor (14) rotates accordingly, and foam is generated after the gas and liquid contact, and after the foam is completely generated and the pressure sensor (9) observes that the pressure reaches the test requirement, the gas cylinder, valve B and the rotator are closed, and the change of the liquid precipitation amount is recorded at a certain time interval. The T-shaped NdFeB magnet (10) is pulled down into the foam, and after the square groove (12) is loaded with foam, it is pulled up again, and the change of the microstructure of the foam under high temperature and high pressure with time is observed through the microscopic camera A (11). If the flow pattern is to be measured, valve D (32) and screw pump B (29) are opened, and the foam is pumped from circular hole D (19) into the circular tube. Microscopic camera B (13) observes the pipe flow characteristics of the foam fluid in the circular tube. After the foam flows through the circular tube, it flows out from circular hole C (20), flows through hose (36) and flows into the circular plate in the autoclave from circular hole E (21), thereby realizing the circulation of the foam. After the measurement is completed, water is filled into the liquid storage tank, screw pump A and valve A are opened, water is pumped into the autoclave to discharge the foam, and the autoclave is cleaned at the same time.

Claims

1. A device for observing the characteristics of high-pressure foam liquid separation, microstructure and pipe flow, characterized by: The device comprises a high-pressure reactor, a sensor fixing shaft, a rotator, a searchlight, a microscopic camera, a square groove, a T-shaped NdFeB magnet, a round plate, a magnet column, a rotor, an LED lamp, a valve, a tee, a hose, a high-pressure reactor bracket, a screw pump, a pressure sensor, a temperature sensor, a liquid storage tank, a gas tank, a computer terminal and data acquisition and analysis equipment; the high-pressure reactor (1) is sealed from top to bottom and compacted by screws so that gas does not leak out; the center of the upper reactor cover is welded and fixed to the sensor fixing shaft, and the sensor fixing shaft contains a temperature sensor (8) and a pressure sensor (9), the two sensors are connected to the computer terminal and the data acquisition and analysis equipment (24) outwardly, and the lower sensor end extends into the reactor to measure the pressure and temperature in the reactor in real time; the side of the high-pressure reactor contains an inner The outer two layers are both made of stainless steel, and a water bath insulation layer is provided between the two layers; a scale line (5) is provided on the groove on one side of the reactor, and an LED lamp (35) is placed outside the symmetrical surface groove (23); a T-shaped NdFeB magnet moving groove (6) is provided on the groove on one side of the scale line, which is used to clamp the T-shaped NdFeB magnet (10); the inner T-shaped NdFeB magnet and two directly connected microscopic cameras A (11), microscopic camera B (13) and square groove (12) are in the high-pressure reactor, and the two T-shaped NdFeB magnets are attracted to each other, one inside and one outside, and relatively fixed; the T-shaped NdFeB magnet can move up and down, and a screw is inserted through the circular hole A (37) on the outer T-shaped NdFeB magnet to connect it to the circular hole B (4) on the side of the groove to fix it, thereby realizing microscopy in the reactor. The camera and the square groove are relatively fixed and move up and down; a round tube is passed through the high-pressure reactor, and the two ends of the round tube respectively penetrate the round hole C (20) and the round hole D (19) on the side of the high-pressure reactor. The round hole C is connected to the round hole E (21) by a hose (36) outwardly, and the round hole D is connected to the valve E (33), the screw pump B (29) and the valve D (32) outwardly, and then leads to a tee (27), and the tee leads to the high-pressure reactor through the round hole F (16); the micro camera A (11) faces downward and can fully capture the square groove (12), and the micro camera B (13) faces the side and is at the same height as the round tube in the high-pressure reactor; the square groove is symmetrically opened on the left and right sides of the side close to the wall of the high-pressure reactor with round holes I (15) for discharging foam; high A rotator (18) is connected to the lower center of the bottom surface of the pressure reactor and can rotate after power is supplied. The rotator is connected to a magnet column (17). A cylindrical ring (22) is wrapped around the magnet column and is used to be welded and fixed to the bottom surface of the reactor. The magnet column contacts the center of a circular plate upward. The circular plate is made of quartz. A rotor (14) is arranged on the upper side of the circular plate. The rotor also has a magnet inside. The circular plate and the magnet column are attracted to each other. The rotator can drive the rotor to rotate when the rotator rotates, thereby ensuring that the gas and liquid are fully contacted to generate foam. The circular plate is seamlessly connected to the side surface of the reactor, and the liquid will not penetrate through the circular plate to the bottom of the reactor. A circular hole H (2) at the uppermost end of the side surface of the water bath layer of the reactor is connected to a liquid storage tank (26) externally. The circular hole G (3) is used to discharge the foam liquid. A searchlight for lighting is installed on the inner side of the reactor top cover.

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