Non-uniform fluid non-resistance flow experimental device and experimental method

Abstract

This invention provides an experimental apparatus and method for unobstructed flow of non-uniform fluid. The apparatus includes a directional magnet, an AC coil, a bearing, a visible liquid-receiving capsule, a steel hoop, a shaft, and a cylindrical cavity with a viewing window. The visible liquid-receiving capsule, the steel hoop, the shaft, and the directional magnet are integrated, with the directional magnet positioned at the upper left and lower right of the steel hoop. The AC coil is integrated with the cylindrical cavity with the viewing window, also positioned at the upper left and lower right of the cavity. The shaft can rotate around the bearing. The directional magnet and the AC coil cause the steel hoop to rotate around the bearing, thereby causing vibration of the fluid in the visible liquid-receiving capsule, resulting in a uniform distribution of the viscoelastic particle oil-displacing agent within the capsule. This unobstructed flow experimental apparatus and method ensures that the non-uniform fluid is fully dispersed within the visible liquid-receiving capsule, ultimately achieving the same injection effect as a homogeneous solution.

Description

Technical Field

[0001] This invention relates to the fields of oilfield chemistry, tertiary oil recovery, and colloid chemistry development technology, and in particular to an experimental apparatus and method for unobstructed flow of non-uniform fluids. Background Technology

[0002] After years of development, most of my country's oilfields have entered the high / ultra-high water-cut stage. Intra-layer, inter-layer, and planar contradictions are becoming increasingly prominent, leading to water channeling along high-permeability sections. This results in an unfavorable situation where injected water circulates ineffectively in high-permeability layers, while low-permeability layers contain large amounts of residual oil. To achieve stable oil production and water control, improve oil displacement and sweep efficiency, and further develop residual oil, domestic and international scholars have continuously researched and developed various fluids to enhance water drive performance. Most of these fluids are non-homogeneous fluids, such as solutions of pre-crosslinked particles, interpenetrating network gels, viscoelastic particle oil displacement agents, microspheres, polymer microsols, nano-silica, and amphiphilic substances prepared in aqueous solutions. These fluids possess unique properties; after injection into the formation, the particles in the solution undergo elastic deformation, adsorption blockage, and throat interruption in the core pores, achieving deep-layer regulation and displacement. However, during indoor injection experiments, due to the relatively small injection speed and pipeline size, non-homogeneous fluids are prone to spontaneous aggregation, crosslinking, and sedimentation under gravity, leading to unstable injection. To ensure stable fluid dispersion and achieve good results in low- to ultra-low permeability core displacement experiments, most nano-displacement agents are currently formulated with pure water. Such nano-displacement agents have a lower injection pressure differential in hydrophilic capillaries than pure water, which can increase the water-driven swept volume by 10% to 20%. However, it is difficult to achieve economic benefits by using pure water to formulate nano-displacement agents. When using on-site water to formulate nano-displacement agents, the stability of the dispersion system is particularly important.

[0003] Chinese patent application CN201611246486.2 discloses an emulsion and powder microsphere injection device and method. The storage tank includes an inner tank, an insulation layer, and an outer shell. A heating tape is uniformly wound around the outer wall of the inner tank, and the insulation layer is positioned between the inner tank and the outer shell. A baffle is installed on the inner wall of the inner tank. A dispersion disc connected to a drive shaft is installed inside the inner tank, and the drive shaft is driven by a motor at the top of the storage tank. A low-pressure gate valve is installed on the outlet pipe at the bottom of the storage tank. The inlet of a dosing pump is connected to the outlet pipe at the bottom of the storage tank, and an input check valve is installed on the inlet of the dosing pump. The outlet of the dosing pump is connected to an output pipe, which is connected to a water injection room or a water injection wellhead. An output check valve is installed on the outlet of the dosing pump, and a safety valve, a pressure transmitter, and a high-pressure gate valve are connected sequentially to the output pipe. The power lines of the heating tape and the signal lines of the pressure transmitter are connected to a control cabinet, which is connected to the switch of the dosing pump. This device can improve the dissolution and dispersion of pharmaceuticals.

[0004] Chinese patent application No. 2022106562308 discloses a wastewater decolorization treatment device, including a decolorization equipment housing and a cover plate. The upper part of the decolorization equipment housing has a decolorizing agent processing chamber, inside which a magnetic stir bar is placed. The lower part of the decolorization equipment housing has a wastewater decolorization chamber, with a central shaft movably connected to the middle of the wastewater decolorization chamber. A drive motor is fixedly connected to the bottom of the central shaft. This wastewater decolorization treatment device for dye production uses a drive motor to rotate the central shaft, which in turn drives the main stirring rod to rotate, facilitating horizontal stirring of the wastewater. During the horizontal rotation of the main stirring rod, the driven gear at the end of the main stirring rod rolls along the gear ring, thereby causing the main stirring rod to rotate. The main stirring rod then drives the auxiliary stirring rod to rotate, enabling vertical stirring of the wastewater.

[0005] Chinese patent application No. 2022102972479 discloses a three-dimensional heterogeneous electro-Fenton device and its application. The device includes: a copper-modified stainless steel cathode, straw-based biochar particle electrodes loaded with nano-zero valent iron, a graphite rod anode, a cylindrical reactor, a magnetic stirrer, a magnetic rotor, an air pump, a disc aerator, and a regulated power supply. The cathode is arranged in a mesh around the inner wall of the cylindrical reactor, while the anode is arranged in a rod-like shape and stands upright in the center of the reactor. Under the combined action of magnetic stirring and aeration, the particle electrodes are uniformly dispersed in the wastewater. This device can be used for the advanced treatment of recalcitrant wastewater. For example, this device can mineralize and degrade 93.82% of 2-naphthol (β-naphthol) within 40 minutes. Under the same reaction conditions, a biochar system without nano-zero valent iron can only remove 64.07% of 2-naphthol (β-naphthol) within 200 minutes, a significantly lower removal efficiency than this three-dimensional heterogeneous electro-Fenton device.

[0006] Chinese patent application No. 2022104932226 discloses a magnetic stirring device for use in conjunction with a strip-shaped reaction chamber. The magnetic stirring device includes a substrate with a rotary drive component mounted on it. It also includes a magnetic module comprising a first magnetic element and a second magnetic element. The first magnetic element is movable under the drive of the rotary drive component, and the second magnetic element is located within the strip-shaped reaction chamber and can rotate within the chamber due to the attraction between it and the first magnetic element. This invention uses a rotary drive component to rotate the first magnetic element in the magnetic module, and the attraction between the first and second magnetic elements drives the movement within the second magnetic element. This allows for stirring and mixing of the reaction liquid within the strip-shaped reaction chamber without contact with the chip substrate, reducing reaction time in the entire microfluidic chip, improving process performance, reducing process steps, and increasing reaction efficiency.

[0007] The existing technologies described above can thoroughly agitate non-uniform fluids and slow down the sedimentation of particles in the solution; however, excessive agitation speed can alter the original morphology of non-uniform fluids with poor viscoelasticity and high flexibility. Simultaneously, colloidal particles easily adhere to the container walls, and in high-pressure piston containers, particle adsorption can occur between the piston and the container wall, causing instability during piston operation and resulting in significant fluctuations in injection pressure. This affects the reliability of fluid performance evaluation, and excessive pressure can lead to rapid piston movement, damaging the agitation components in the high-pressure container and even posing safety hazards. All of these differ significantly from our present invention and fail to solve the technical problems we aim to address. Therefore, we have invented a new experimental apparatus and method for unobstructed flow of non-uniform fluids. Summary of the Invention

[0008] The purpose of this invention is to provide an experimental apparatus and method for unobstructed flow of non-uniform fluids that can effectively maintain the dispersed and stable flow of non-uniform fluids and can effectively guide actual production through indoor experimental results.

[0009] The objective of this invention can be achieved through the following technical measures: a non-uniform fluid unobstructed flow experimental device, comprising a directional magnet, an AC coil, a bearing, a visible liquid-receiving capsule, a steel hoop, a shaft, and a cylindrical cavity with a viewing window. The visible liquid-receiving capsule is located within the cylindrical cavity with a viewing window. The visible liquid-receiving capsule, the steel hoop, the shaft, and the directional magnet are integrated, with the directional magnet positioned above the left and below the right of the steel hoop. The AC coil is integrated with the cylindrical cavity with a viewing window, positioned above the left and below the right of the cylindrical cavity with a viewing window. The shaft can rotate around the bearing. The directional magnet and the AC coil cause the steel hoop to rotate around the bearing, thereby causing vibration of the fluid in the visible liquid-receiving capsule, resulting in a uniform distribution of the viscoelastic particle oil-displacing agent within the visible liquid-receiving capsule.

[0010] The objective of this invention can also be achieved through the following technical measures:

[0011] The non-uniform fluid flow experiment device also includes a bearing bushing, which is integrated with the AC coil and the cylindrical cavity with a viewing window. The part of the bearing bushing connected to the shaft has radial constraint and can achieve circumferential rotation of 150°.

[0012] The bearing bushing has threads on the right side and a matching nut for connecting the shaft.

[0013] The non-uniform fluid flow experiment device also includes an inlet and an outlet. The inlet is located above the cavity with a viewing window, and the outlet is located below the cavity with a viewing window. Liquid is pumped into the cavity with a viewing window from the inlet, and under pressure, the fluid flows out from the outlet below the viewing liquid-receiving capsule.

[0014] The experimental apparatus for unobstructed flow of non-uniform fluid also includes an upper cover and a lower cover. The upper cover is located at the top of the cavity with a viewing window, and the lower cover is located at the bottom of the cavity with a viewing window. The cavity with a viewing window is a cylinder with external threads at both the top and bottom. Both the upper cover and the lower cover have internal threads. The inlet is located on the upper cover, and the outlet is located on the lower cover. Both have matching sealing rings to ensure the sealing of the outlet and the inlet.

[0015] The non-uniform fluid flow experiment device also includes a quick connector and a hose. One end of the hose is connected to the outlet. The quick connector is divided into two sections, a and b. Section a of the quick connector is connected to the visible liquid-receiving capsule at the bottom of the steel hoop, and section b of the quick connector is connected to the other end of the hose, so that it is connected to the outlet.

[0016] The hose is graduated, with an inner diameter of 4mm and an outer diameter of 6mm. It does not deform under an internal pressure of 1MPa.

[0017] The quick connector has an inner diameter of 4mm for section a and 2mm for section b, and features a high-pressure seal.

[0018] The cylindrical container with a viewing window has a pressure-bearing circular container. There is a pressure-resistant viewing window on the side of the container, which can be used to observe whether the fluid in the visible liquid-bearing capsule is in the middle of the visible liquid-bearing capsule during the movement process.

[0019] An ultrasonic device can be used as a substitute for the directional magnet.

[0020] The objective of this invention can also be achieved through the following technical measures: a non-uniform fluid unobstructed flow experimental method, which employs a non-uniform fluid unobstructed flow experimental apparatus, including:

[0021] Step 1: Connect the lower cover to the cavity with the viewing window;

[0022] Step 2: Connect the shaft and bearing bushing together so that the liquid-bearing capsule, steel hoop, shaft, directional magnet or ultrasonic device, AC coil, bearing bushing, and visible cavity can be viewed as a whole.

[0023] Step 3: Pour the prepared non-uniform fluid into the visible liquid-receiving capsule, and then connect quick connector a, quick connector b, and hose in sequence.

[0024] Step 4: Connect the quick connector b to the other injection end hose in the experiment, check the seal, then fill the cavity with the viewing window with distilled water, and finally connect the top cap to the cavity with the viewing window.

[0025] Step 5: Turn on the power switch and adjust it to the corresponding setting. The steel hoop will start to rotate. The experiment will begin 10 minutes after the switch has been on.

[0026] Step 6: Inject distilled water through the inlet and control the flow of the non-uniform fluid prepared in the visible liquid-holding capsule by adjusting the injection speed of the injected fluid.

[0027] The objective of this invention can also be achieved through the following technical measures:

[0028] In step 3, the prepared non-uniform fluid is a nanomaterial, a viscoelastic particle oil displacement agent, or a pre-crosslinked particle.

[0029] In step 5, there are 5 gears. Different gears correspond to the frequency at which the current direction of the AC coil changes at different times, thereby controlling the frequency of the steel hoop rotation. The rotation frequency of the steel hoop gradually increases from gear 1 to gear 5.

[0030] In step 5, the gear is determined based on the particle V in the non-uniform fluid. 沉降 V of the steel hoop after the device is energized 转动 In the design, different non-uniform fluids can be calculated to obtain different settling velocities, while V 转动 This is achieved through different gears:

[0031]

[0032] V 沉降 —Settling velocity of particles, cm / s;

[0033] δ—particle density, g / cm³ 3 ;

[0034] d — diameter of the particle, in cm;

[0035] ρ — density of a non-uniform fluid, g / cm³ 3 ;

[0036] μ – viscosity of a non-uniform fluid, Pa·s.

[0037] In step 5, the uniformity of the fluid particles in the visible liquid-bearing capsule is observed through the viewing window cavity. If they are not uniform, the ultrasonic device can be further adjusted to make the fluid mix evenly under ultrasonic action.

[0038] The experimental apparatus and method for unimpeded flow of non-uniform fluids in this invention, starting from the properties of non-uniform fluids and guided by mechanical properties, fully utilizes the principles of mass equilibrium and electromagnetic interaction to provide a high-pressure homogenization method that does not directly contact the non-uniform fluid, as well as a pistonless device to ensure arbitrary flow of the non-uniform fluid. The beneficial effects of this invention are:

[0039] In practice, due to gravity and inherent properties, non-uniform fluids, after being prepared, undergo swelling, aggregation, cross-linking, and sedimentation before injection. Therefore, the visual liquid-receiving capsule of this invention is designed in a pear shape. This reduces the amount of non-uniform fluid at the bottom. Furthermore, when the steel hoop oscillates, it generates centrifugal force. Due to gravity, the centrifugal force is greater further from the bottom and smaller closer to the bottom. Consequently, the aggregation effect of non-uniform fluid is more pronounced closer to the bottom. The pear-shaped design avoids this problem. To maintain operational stability, when centrifugal force cannot disperse the fluid evenly, an ultrasonic device can be used to further disperse the non-uniform fluid within the visual liquid-receiving capsule, ultimately achieving the same injection effect as a homogeneous solution. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of an experimental device for unobstructed flow of non-uniform fluid in a specific embodiment of the present invention;

[0041] Figure 2 This is a motion diagram of a non-uniform fluid during the use of the preparation device in a specific embodiment of the present invention;

[0042] Figure 3 This is a diagram illustrating the movement of a non-uniform fluid during injection, as shown in a specific embodiment of the present invention.

[0043] Figure 4 This is a comparison diagram of injection pressure acquisition between a general device and the present invention in a specific embodiment of the present invention;

[0044] In the diagram: 1-Cavity with viewing window, 2-Directional magnet, 3-AC coil, 4-Bearing, 5-Bearing bushing, 6-Upper cover, 7-Inlet, 8-Viewable liquid-receiving capsule, 9-Steel hoop, 10-Shaft, 11-Quick connector, 12-Hose with graduations, 13-Outlet, 14-Lower cover. Detailed Implementation

[0045] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0046] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, and / or combinations thereof.

[0047] An experimental apparatus for unobstructed flow of non-uniform fluid includes a directional magnet, an AC coil, a bearing, a bearing bushing, an upper cover, an inlet, a visible liquid-receiving capsule, a steel hoop, a shaft, a quick connector, a hose, a lower cover, an outlet, and a cylindrical cavity with a viewing window.

[0048] The visible liquid-receiving capsule, steel hoop, shaft, and directional magnet are integrated into one unit, with the directional magnets located at the upper left and lower right of the steel hoop, respectively.

[0049] The AC coil, bearing bushing, and cavity with viewing window are integrated into one unit, with the AC coil located at the upper left and lower right of the cavity with viewing window, respectively.

[0050] The quick connector a is connected to the visible liquid-receiving capsule at the bottom of the steel hoop, and the quick connector b is connected to the outlet hose of the lower cap;

[0051] The bearing bushing has threads on the right side and a matching nut;

[0052] The cavity with the visible window is cylindrical with external threads at the top and bottom. The upper and lower covers each have internal threads. The upper and lower covers each have matching sealing rings at their respective inlets and outlets, thus ensuring the airtightness of the inlets and outlets.

[0053] The bearing bushing, at the part connected to the shaft, has radial constraint, allowing for circumferential rotation at an angle of 150°.

[0054] The hose is graduated, with an inner diameter of 4mm and an outer diameter of 6mm, and does not deform under an internal pressure of 1MPa.

[0055] The quick connector a has an inner diameter of 4mm, and the quick connector b has an inner diameter of 2mm, and is high-pressure sealed.

[0056] The directional magnet can be replaced by an ultrasonic device.

[0057] Based on the aforementioned experimental apparatus for unobstructed flow of non-uniform fluid, a method for controlling unobstructed flow of non-uniform fluid is proposed, comprising the following steps:

[0058] a. First, connect the lower cover to the cavity with the viewing window;

[0059] b. Then connect the shaft and bearing bushing together, so that the liquid-bearing capsule, steel hoop, shaft, directional magnet, AC coil, bearing bushing and visible window cavity can be seen as a whole;

[0060] c. Pour the prepared non-uniform fluid (nanomaterials, viscoelastic particle oil displacement agent, pre-crosslinked particles, etc.) into the visible liquid-receiving capsule, and then connect quick connector a, hose, and quick connector b in sequence.

[0061] d. Connect the quick connector at point b to the other injection end in the experiment, and finally connect the upper cap to the cavity with the viewing window.

[0062] e. The entire device has been installed and the non-uniform fluid has been added to the device. At this time, turn on the power switch and adjust it to the corresponding position. The steel hoop will start to rotate. The experiment will begin 10 minutes after the switch is turned on.

[0063] f. Inject hydraulic oil (which can be different injection media such as water) from the inlet, and control the injection of non-uniform fluid prepared in the visible liquid-bearing capsule by controlling the injection volume and injection speed.

[0064] There are 5 gear positions, and the different gear positions correspond to the frequency at which the current direction of the AC coil changes at different times, thereby controlling the frequency of the steel hoop rotation. The rotation frequency of the steel hoop gradually increases from gear 1 to gear 5.

[0065] The gear position is based on the particle V in a non-uniform fluid. 沉降 V of the steel hoop after the device is energized 转动 The design is carried out. Different non-uniform fluids can be calculated to obtain different settling velocities, while V 转动 This is achieved through different gears.

[0066]

[0067] V 沉降 —Settling velocity of particles, cm / s;

[0068] δ—particle density, g / cm³ 3 ;

[0069] d — diameter of the particle, in cm;

[0070] ρ — density of a non-uniform fluid, g / cm³ 3 ;

[0071] μ – viscosity of a non-uniform fluid, Pa·s.

[0072] The following are several specific embodiments of the application of the present invention.

[0073] Example 1

[0074] In a specific embodiment 1 of the present invention, such as Figure 1 As shown, Figure 1 This is a structural diagram of the non-uniform fluid unobstructed flow experimental device of the present invention. The non-uniform fluid unobstructed flow experimental device includes a directional magnet 2, an AC coil 3, a bearing 4, a bearing bushing 5, an upper cover 6, an inlet 7, a visible liquid-receiving capsule 8, a steel hoop 9, a shaft 10, a quick connector 11, a hose 12, a lower cover 14, an outlet 13, and a cylindrical cavity 1 with a viewing window.

[0075] The described cylindrical cavity 1 with a viewing window has a pressure-bearing circular container. There is a pressure-resistant viewing window on the side of the container, which can be used to observe whether the fluid in the visible liquid-bearing capsule is located in the middle of the capsule during the movement process.

[0076] The directional magnet 2 and the AC coil 3 enable the steel hoop 9 to rotate around the bearing 4, thereby causing the fluid in the visible liquid-bearing capsule 8 to vibrate and ensuring that the viscoelastic particle oil-displacing agent is evenly distributed inside the capsule.

[0077] The inlet 7 allows distilled water to be pumped into 1, and under pressure, the fluid in the visible liquid-receiving capsule 8 flows out from the outlet 13. The visible liquid-receiving capsule 8, steel hoop 9, shaft 10, and directional magnet 2 are integrated into one unit, with the directional magnet 2 located at the upper left and lower right of the steel hoop 9, respectively.

[0078] The AC coil 3, bearing bushing 5, and cylindrical cavity 1 with viewing window are integrated into one unit, with the AC coil 3 located at the upper left and lower right of the cylindrical cavity 1 with viewing window respectively.

[0079] The quick connector a is connected to the visible liquid-receiving capsule 8 at the bottom of the steel hoop 9, and the quick connector b is connected to the hose 12 at the outlet of the lower cover 14.

[0080] The bearing bushing 5 has a thread on its right side and a matching nut; the bearing bushing 5, the part of which is connected to the shaft 10, has radial constraint and can achieve circumferential rotation of 150°.

[0081] The cavity 1 with the visible window is a cylinder with external threads at the top and bottom. The upper cover 6 and the lower cover 14 each have internal threads. The upper cover 6 and the lower cover 14 each have matching sealing rings at their respective inlets and outlets, thereby ensuring the sealing of the inlets and outlets.

[0082] The hose 12 is graduated, with an inner diameter of 4 mm and an outer diameter of 6 mm, and does not deform under an internal pressure of 1 MPa.

[0083] The quick connector a has an inner diameter of 4mm, and the quick connector b has an inner diameter of 2mm, and is high-pressure sealed.

[0084] Example 2

[0085] In a specific embodiment 2 of the present invention, a viscoelastic particle oil displacement agent (pre-crosslinked gel particles) with a non-uniform fluid concentration of 2000 mg / L and a particle size of 50-100 mesh is used. After the solution is prepared and left to stand for 30 minutes, the viscoelastic particle oil displacement agent tends to aggregate and precipitate at the bottom of the container. The prepared viscoelastic particle oil displacement agent solution is poured into a visible liquid-receiving capsule, and then quick connector a, hose, and quick connector b are connected in sequence. Quick connector b is connected to another injection end in the experiment. Finally, the top cap is connected to the cavity with the viewing window. The entire device is now installed. The power switch is turned on and adjusted to the corresponding position to make the steel hoop start to rotate. The uniformity of the viscoelastic particle oil displacement agent solution in the visible liquid-receiving capsule is observed through the viewing window of the cavity. Figure 2 After adjusting to the appropriate setting to homogenize the viscoelastic particle oil displacement agent solution, hydraulic oil is injected into the inlet to increase the pressure inside the viewing window cavity, compressing the surrounding area of ​​the viewing fluid-receiving capsule, thereby allowing the viscoelastic particle oil displacement agent solution to flow out from the outlet. Figure 3 ).

[0086] Figure 2 The following is a motion diagram of a non-uniform fluid during the use of the preparation device in a specific embodiment of the present invention. In the original state, the power switch is turned on and adjusted to the corresponding position to make the steel hoop start to rotate. The uniformity of the viscoelastic particle oil displacement agent solution in the visible liquid-bearing capsule can be observed through the viewing window of the cylinder.

[0087] Figure 3 This diagram illustrates the movement of a non-uniform fluid during injection in a specific embodiment of the present invention. After the viscoelastic particle oil displacement agent solution is homogenized, hydraulic oil is injected at the inlet to increase the pressure inside the viewing window cavity, compressing the surrounding area of ​​the viewing liquid-receiving capsule, thereby allowing the viscoelastic particle oil displacement agent solution to flow out from the outlet.

[0088] Example 3

[0089] In a specific embodiment 3 of the present invention, a viscoelastic particle oil displacement agent (pre-crosslinked gel particles) is used as an example. A 100-150 mesh viscoelastic particle oil displacement agent is connected to a core holder at the outlet of both a general apparatus and the apparatus of the present invention. Based on a normal displacement experiment, the core size is Φ2.5×7cm, its permeability is 3D, the concentration of the viscoelastic particle oil displacement agent is 2000mg / L, and the displacement rate is 0.5mL / min. A pressure gauge is connected to the inlet end of the core holder, and pressure data is collected during the experiment. The pressure data collection graph is shown below. Figure 4As shown in the figure, the injection pressure increases continuously with the injection volume. However, with the device of the present invention, although the injection pressure increases slowly with the injection volume and fluctuates, it tends to stabilize when the injection volume reaches a certain level. This indicates that when the device provided by the present invention injects non-uniform fluid, the non-uniform fluid enters the core uniformly before and during the injection process, thereby achieving the purpose of the present invention.

[0090] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0091] Except for the technical features described in the specification, all other technologies are known to those skilled in the art.

Claims

1. A non-uniform fluid unimpeded flow experimental device, characterized in that, The experimental apparatus for unobstructed flow of non-uniform fluid includes a directional magnet, an AC coil, a bearing, a visible liquid-receiving capsule, a steel hoop, a shaft, and a cylindrical cavity with a viewing window. The visible liquid-receiving capsule is located inside the cylindrical cavity with a viewing window. The visible liquid-receiving capsule, the steel hoop, the shaft, and the directional magnet are integrated into one unit. The directional magnet is located at the upper left and lower right of the steel hoop. The AC coil is integrated into the cylindrical cavity with a viewing window and is located at the upper left and lower right of the cylindrical cavity with a viewing window. The shaft can rotate around the bearing. The directional magnet and the AC coil cause the steel hoop to rotate around the bearing, thereby causing the fluid in the visible liquid-receiving capsule to vibrate, resulting in a uniform distribution of the viscoelastic particle oil-displacing agent inside the visible liquid-receiving capsule.

2. The non-uniform fluid barrier-free flow experimental device according to claim 1, wherein, The non-uniform fluid flow experiment device also includes a bearing bushing, which is integrated with the AC coil and the cylindrical cavity with a viewing window. The part of the bearing bushing connected to the shaft has radial constraint and can achieve circumferential rotation of 150°.

3. The non-uniform fluid barrier-free flow experimental device according to claim 2, wherein, The bearing bushing has threads on the right side and a matching nut for connecting the shaft.

4. The experimental apparatus for unobstructed flow of non-uniform fluid according to claim 3, characterized in that, The non-uniform fluid flow experiment device also includes an inlet and an outlet. The inlet is located above the cavity with a viewing window, and the outlet is located below the cavity with a viewing window. Liquid is pumped into the cavity with a viewing window from the inlet, and under pressure, the fluid flows out from the outlet below the viewing liquid-receiving capsule.

5. The non-uniform fluid barrier-free flow experimental device according to claim 4, wherein, The non-uniform fluid flow experiment device also includes an upper cover and a lower cover. The upper cover is located at the top of the cavity with a viewing window, and the lower cover is located at the bottom of the cavity with a viewing window. The cavity with a viewing window is a cylinder with external threads at both the top and bottom. The upper cover and the lower cover each have internal threads. The inlet is located on the upper cover, and the outlet is located on the lower cover. Both the inlet and the outlet have matching sealing rings to ensure the sealing performance of the inlet and the outlet.

6. The non-uniform fluid barrier-free flow experimental device according to claim 5, wherein, The non-uniform fluid flow experiment device also includes a quick connector and a hose. One end of the hose is connected to the outlet. The quick connector is divided into two sections, a and b. Section a of the quick connector is connected to the visible liquid-receiving capsule at the bottom of the steel hoop, and section b of the quick connector is connected to the other end of the hose, so that it is connected to the outlet.

7. The non-uniform fluid barrier-free flow experimental device according to claim 6, wherein, The hose is graduated, with an inner diameter of 4mm and an outer diameter of 6mm. It does not deform under an internal pressure of 1MPa.

8. The non-uniform fluid barrier-free flow experimental device according to claim 7, wherein, The inner diameter of section a of the quick connector is 4mm, and the inner diameter of section b of the quick connector is 2mm.

9. The non-uniform fluid barrier-free flow experimental apparatus according to claim 1, wherein, The cylindrical container with a viewing window has a pressure-bearing circular container. There is a pressure-resistant viewing window on the side of the container, which can be used to observe whether the fluid in the visible liquid-bearing capsule is in the middle of the visible liquid-bearing capsule during the movement process.

10. A method of non-uniform fluid unimpeded flow experimentation, characterized by, The experimental method for unobstructed flow of non-uniform fluid uses the experimental apparatus for unobstructed flow of non-uniform fluid as described in claim 8, including: Step 1: Connect the lower cover to the cavity with the viewing window; Step 2: Connect the shaft and bearing bushing together so that the liquid-bearing capsule, steel hoop, shaft, directional magnet, AC coil, bearing bushing, and visible window cavity can be seen as a whole. Step 3: Pour the prepared non-uniform fluid into the visible liquid-receiving capsule, and then connect quick connector a, quick connector b, and hose in sequence. Step 4: Connect the quick connector b to the other injection end hose in the experiment, check the seal, then fill the cavity with the viewing window with distilled water, and finally connect the top cap to the cavity with the viewing window. Step 5: Turn on the power switch and adjust it to the corresponding setting. The steel hoop will start to rotate. The experiment will begin 10 minutes after the switch has been on. Step 6: Inject distilled water through the inlet and control the flow of the non-uniform fluid prepared in the visible liquid-holding capsule by adjusting the injection speed of the injected fluid.

11. The non-uniform fluid barrier-free flow experiment method according to claim 10, wherein, In step 5, there are 5 gears. Different gears correspond to the frequency at which the current direction of the AC coil changes at different times, thereby controlling the frequency of the steel hoop rotation. The rotation frequency of the steel hoop gradually increases from gear 1 to gear 5.

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