Proppant fracture conductivity testing device

Abstract

The invention provides a proppant fracture conductivity testing device which comprises a mounting frame, mounting parts are slidably arranged in the mounting frame, core assemblies are arranged on the mounting parts, the number of the mounting parts is two, each mounting part is provided with one core assembly, and the core assemblies are arranged on the side walls, close to each other, of the mounting parts. A driving assembly is arranged in the mounting frame and used for driving the mounting parts to move in the direction close to or away from each other, limiting pieces are arranged on the mounting parts and used for limiting the positions of the rock core assemblies on the mounting parts, one end of the mounting frame communicates with an upper inner pipe, and the other end of the mounting frame communicates with a lower inner pipe; an inlet pipe is arranged at the end, away from the mounting frame, of the upper inner pipe, an outlet pipe is arranged at the end, away from the mounting frame, of the lower inner pipe, a double-cylinder pump is arranged at the end, away from the upper inner pipe, of the inlet pipe, and a flow testing device is arranged at the end, away from the lower inner pipe, of the outlet pipe.

Description

Technical Field

[0001] The present application relates to the field of proppant detection, and in particular to a proppant fracture conductivity testing device. Background Art

[0002] The contents of this section merely provide background information related to the present application and may not constitute prior art.

[0003] my country's unconventional resources such as tight oil and gas are widely distributed and have large reserves. However, tight oil and gas reservoirs have low porosity and permeability, strong heterogeneity, and are difficult to develop. As the main technology for increasing oil and gas production and increasing water well injection, volume fracturing technology can effectively increase the transformation volume of the reservoir. It has been widely used in the development of oil and gas in low permeability and ultra-low permeability reservoirs. In the process of volume fracturing, a large amount of sand-carrying fluid mixed with proppants is usually injected into the volume fracture system. After the fracturing fluid is returned, a high-conductivity porous medium flow channel composed of fractures and proppants is left in the reservoir. Fracturing proppant is an important material in oil and gas well fracturing construction. Its conductivity directly affects the fracturing effect. Therefore, it is very important to accurately test the conductivity of proppant. This test is mainly based on Darcy's law. By measuring the flow rate of proppant under a certain pressure difference, its conductivity is calculated.

[0004] The specific steps of the proppant fracture conductivity test include the following steps: prepare proppant samples, screen proppant according to the specified particle size range to ensure that the quality meets the test requirements, assemble the test equipment, connect the diversion chamber, pressure pump, flow meter, pressure gauge, etc. in sequence to ensure good sealing, place the proppant sample, and evenly place the screened proppant in the diversion chamber. Start the pressure pump to set the pressure difference according to the test requirements to make the fluid pass through the proppant sample. After the fluid flows stably, record the flow and pressure data.

[0005] However, the above-mentioned related technologies have the following defects: the diversion chamber is usually composed of two split cores, and the actual use scenarios of the proppant are very complicated. Therefore, it is necessary to prepare a variety of different core samples to form different diversion chambers and conduct multiple tests to test the diversion capacity of the proppant under different widths and different core cross-sections. When replacing the diversion chamber, the operation is relatively complicated, which affects the test efficiency. Summary of the invention

[0006] In order to solve the above technical problems, the purpose of the present application is to provide a proppant fracture conductivity testing device, which can effectively improve the testing efficiency of the proppant fracture conductivity.

[0007] The purpose of this application is achieved through the following technical solutions: A proppant fracture conductivity testing device comprises a mounting frame, a mounting portion is slidably arranged in the mounting frame, a core assembly is arranged on the mounting portion, two mounting portions are arranged, each mounting portion is arranged with a core assembly, the core assembly is arranged on the side walls of the mounting portions close to each other, a driving assembly is arranged in the mounting frame, the driving assembly is used to drive the mounting portions to move in a direction of approaching or moving away from each other, a limiting member is arranged on the mounting portion, the limiting member is used to limit the position of the core assembly on the mounting portion, an upper inner tube is connected to one end of the mounting frame, a lower inner tube is connected to the other end of the mounting frame, an inlet pipe is arranged at one end of the upper inner tube away from the mounting frame, an outlet pipe is arranged at one end of the lower inner tube away from the mounting frame, a double-cylinder pump is arranged at one end of the inlet pipe away from the upper inner tube, and a flow testing device is arranged at one end of the outlet pipe away from the lower inner tube.

[0008] In some possible embodiments, a slide groove is provided on the inner wall of the installation frame, and two slide grooves are provided, and the two slide grooves are respectively arranged on both sides of the upper inner tube, and the two slide grooves are symmetrically arranged along the axis of the upper inner tube. Two sliders are provided in each slide groove, and the two sliders are respectively arranged at both ends of the slide groove. The sliders are fixedly connected to the mounting part in a one-to-one correspondence, and the driving assembly is used to drive the two sliders in the same slide groove to move toward or away from each other.

[0009] In some possible embodiments, the driving assembly includes a driving motor and a lead screw, wherein the driving motor is fixedly mounted on a mounting frame, the lead screw is rotatably mounted in the slide groove along the length direction of the slide groove, the lead screw is transmission-connected to an output shaft of the driving motor, and the slider is threadedly sleeved on the lead screw.

[0010] In some possible embodiments, the lead screw is provided with one, the lead screw is provided in one of the slide grooves, a guide rod is fixedly provided in the other slide groove along the length direction of the slide groove, a guide hole is provided on the slider for the guide rod to slide through, the lead screw is provided as a bidirectional thread, and spiral grooves with opposite rotation directions are provided at both ends of the lead screw.

[0011] In some possible embodiments, a mounting groove is opened on the side walls of the mounting part that are close to each other, one end of the mounting groove is set through an opening, a mounting block is slidably set in the mounting groove, the mounting block is fixedly connected to the core assembly, and the limit member is used to limit the position of the mounting block in the mounting groove.

[0012] In some possible embodiments, the mounting groove is provided as a T-shaped groove, the mounting block is provided as a T-shaped block matched with the mounting groove, the limiting member is provided as a limiting pin, a mounting hole is provided on the side wall of the mounting block, the limiting member is slidably passed through the mounting hole, a limiting hole for inserting the limiting member is provided on the inner wall of the mounting groove, an elastic member is provided on the mounting block, the elastic member is used to drive the limiting member to move in a direction away from the mounting hole, and a driving member is provided on the mounting portion, the driving member is used to drive the limiting member to move in a direction away from the limiting hole.

[0013] In some possible embodiments, a through hole is opened on the side walls of the mounting portion that are away from each other, the through hole is coaxial with the limiting hole and is connected, the driving member is set as a push rod, the driving member is slidably inserted into the through hole, and one end of the driving member close to the core assembly is used to abut against the end of the limiting member. A connecting member is provided on the mounting portion, and the connecting member is used to connect the driving member and the mounting portion.

[0014] In some possible embodiments, the connecting member is configured as a spring, and a boss is coaxially fixedly arranged at one end of the driving member away from the limiting member, the diameter of the boss is larger than the driving member, the connecting member is sleeved on the driving member, one end of the connecting member is fixedly connected to the side wall of the boss close to the limiting member, and the other end is fixedly connected to the side wall of the mounting portion.

[0015] In some possible embodiments, a ball is embedded in one end of the limiting member away from the mounting hole, and the ball is used to roll in contact with the inner wall of the mounting groove.

[0016] In some possible embodiments, a slope is provided at the side opening of the installation groove, and the slope is inclined in a direction away from the core assembly. In summary, the technical solution of the embodiment of the present application has at least the following advantages and beneficial effects: 1. In actual use, when different core components need to be replaced, the position restriction of the core component on the mounting part by the limiter is released, and the core component can be removed from the mounting part, and then the core component can be replaced. At the same time, the mounting parts can be driven by the driving component to move toward or away from each other, thereby achieving the purpose of adjusting the distance between the two mounting parts. The operation is simple and convenient with good practicality; 2. When the distance between the two mounting parts needs to be adjusted, the drive motor is started to drive the lead screw to rotate, thereby driving the slider to move in the slide slot. As the slider moves, the mounting parts can be driven to move toward or away from each other, thereby achieving the purpose of adjusting the distance between the mounting parts. The threaded transmission between the lead screw and the slider engages with each other, which has a certain self-locking effect and can effectively prevent the slider from slipping in the slide slot, further improving the overall reliability of the device and ensuring the accuracy of the test results. 3. In the process of driving the installation part to move, the lead screw drives the slider to move in the slide groove, and the slider in the slide groove on the other side is slidably sleeved on the guide rod, so that the slider and the guide rod slide relative to each other, thereby guiding and assisting the movement of the installation part to a certain extent, ensuring the stability of the installation part during movement, and avoiding the position deviation of the installation part on the installation frame, further improving the overall reliability of the device; 4. When the core assembly is disassembled and installed, the limit piece always has a tendency to move away from the mounting hole under the action of the elastic piece, so that the end of the limit piece always abuts against the inner wall of the mounting groove, and the sliding friction between the end of the limit piece and the inner wall of the mounting groove is converted into rolling friction through the ball, which can effectively reduce the sliding friction between the end of the limit piece and the inner wall of the mounting groove, facilitates the installation and disassembly of the core assembly, reduces the wear between the limit piece and the inner wall of the mounting groove, and increases the overall service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 This is a schematic diagram of the exploded structure of the baffle of an embodiment of the present application; Figure 3 A cross-sectional view of a mounting frame according to an embodiment of the present application; Figure 4 Schematic diagram of the structure of the limiting member of the embodiment of the present application.

[0018] Icons: 1. Installation frame; 11. Installation part; 12. Core assembly; 13. Upper inner tube; 14. Lower inner tube; 15. Inlet pipe; 16. Outlet pipe; 17. Dual-cylinder pump; 18. Flow test device; 19. Baffle; 191. Bolt; 192. First connecting hole; 193. Second connecting hole; 2. Drive assembly; 21. Drive motor; 22. Screw; 23. Guide rod; 24. Guide hole; 3. Limiting piece; 301. Ball; 31. Mounting groove; 32. Mounting block; 33. Mounting hole; 34. Limiting hole; 35. Elastic piece; 36. Drive piece; 37. Perforation; 38. Connecting piece; 39. Boss; 4. Slide groove; 41. Slider; 5. Inclined surface. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] The following reference Figures 1 to 4 This application is described in further detail.

[0021] Reference Figures 1 to 4 A proppant fracture conductivity testing device comprises a mounting frame 1, a mounting portion 11 is slidably arranged in the mounting frame 1, a core assembly 12 is arranged on the mounting portion 11, two mounting portions 11 are arranged, each mounting portion 11 is provided with a core assembly 12, the core assembly 12 is arranged on the side walls of the mounting portion 11 close to each other, a driving assembly 2 is arranged in the mounting frame 1, the driving assembly 2 is used to drive the mounting portion 11 to move in a direction close to or away from each other, and a core assembly 12 is arranged on the mounting portion 11. A limit member 3 is provided, which is used to limit the position of the core assembly 12 on the mounting portion 11. An upper inner tube 13 is connected to one end of the mounting frame 1, and a lower inner tube 14 is connected to the other end of the mounting frame 1. An inlet pipe 15 is provided at one end of the upper inner tube 13 away from the mounting frame 1, and an outlet pipe 16 is provided at one end of the lower inner tube 14 away from the mounting frame 1. A double-cylinder pump 17 is provided at one end of the inlet pipe 15 away from the upper inner tube 13, and a flow testing device 18 is provided at one end of the outlet pipe 16 away from the lower inner tube 14.

[0022] As an embodiment of the present application, a baffle 19 is detachably provided on one side of the mounting frame 1, and the baffle 19 is connected to the mounting frame 1 by a bolt 191. A first connecting hole 192 is provided on the baffle 19, and the bolt 191 is slidably penetrated in the first connecting hole 192. A second connecting hole 193 for threaded connection of the bolt 191 is provided on the side wall of the mounting frame 1. As an embodiment of the present application, refer to Figure 2 There are four bolts 191, and there are also four corresponding first connecting holes 192 and second connecting holes 193.

[0023] Reference Figure 3 A slide groove 4 is provided on the inner wall of the mounting frame 1, and two slide grooves 4 are provided. The two slide grooves 4 are respectively arranged on both sides of the upper inner tube 13, and the two slide grooves 4 are symmetrically arranged along the axis of the upper inner tube 13. Two sliders 41 are provided in each slide groove 4, and the two sliders 41 are respectively arranged at both ends of the slide groove 4. The sliders 41 are fixedly connected with the mounting portion 11 in a one-to-one correspondence, and the driving component 2 is used to drive the two sliders 41 in the same slide groove 4 to move toward or away from each other.

[0024] As an implementation mode of the present application, the chute 4 can also be provided with four Figure 3 As shown, two slide grooves are provided on the upper top wall and the lower bottom wall inside the installation frame 1 , and two slide blocks 41 are slidably provided in each slide groove 4 , so eight slide blocks 41 are provided.

[0025] As an implementation method of this application, refer to Figure 3The driving assembly 2 includes a driving motor 21 and a lead screw 22. The driving motor 21 is fixedly arranged on the mounting frame 1. The lead screw 22 is rotatably arranged in the slide groove 4 along the length direction of the slide groove 4. The lead screw 22 is transmission-connected to the output shaft of the driving motor 21. The slider 41 is threadedly sleeved on the lead screw 22.

[0026] When it is necessary to adjust the distance between the two mounting parts 11, the drive motor 21 is started to drive the lead screw 22 to rotate, thereby driving the slider 41 to move in the slide groove 4. As the slider 41 moves, the mounting parts 11 can be driven to move in a direction closer to or farther away from each other, thereby achieving the purpose of adjusting the distance between the mounting parts 11. The threaded transmission between the lead screw 22 and the slider 41 has a certain self-locking effect, which can effectively prevent the slider 41 from slipping in the slide groove 4, further improving the overall reliability of the device and ensuring the accuracy of the test results.

[0027] As an embodiment of the present application, the number of the lead screw 22 is set to one, the lead screw 22 is set in one of the slide grooves 4, and a guide rod 23 is fixedly set in the other slide grooves 4 along the length direction of the slide grooves 4. A guide hole 24 for the guide rod 23 to slide through is opened on the slider 41. The lead screw 22 is set to be a bidirectional lead screw, and spiral grooves with opposite rotation directions are opened at both ends of the lead screw 22.

[0028] In the process of driving the mounting part 11 to move, the lead screw 22 drives the slider 41 to move in the slide groove 4, and the slider 41 in the slide groove 4 on the other side is slidably mounted on the guide rod 23, and relative sliding occurs between the slider 41 and the guide rod 23, thereby being able to play a certain guiding and auxiliary role in the movement of the mounting part 11, ensuring the stability of the mounting part 11 during movement, and avoiding the position deviation of the mounting part 11 on the mounting frame 1, further improving the overall reliability of the device.

[0029] Reference Figure 4 A mounting groove 31 is provided on the side walls of the mounting portion 11 that are close to each other. One end of the mounting groove 31 is provided with an opening through which a mounting block 32 is slidably provided in the mounting groove 31. The mounting block 32 is fixedly connected to the core assembly 12. The limiting member 3 is used to limit the position of the mounting block 32 in the mounting groove 31.

[0030] As an implementation method of this application, Figure 4 As shown, the mounting groove 31 is opened as a T-shaped groove, and the mounting block 32 is configured as a T-shaped block adapted to the mounting groove 31; as another possible implementation of the present application, the mounting groove 31 can also be opened as a dovetail groove, in which case the mounting block 32 is configured as a dovetail block adapted to the mounting groove 31.

[0031] Reference Figure 4As an embodiment of the present application, the limit member 3 is configured as a limit pin, a mounting hole 33 is provided on the side wall of the mounting block 32, the limit member 3 is slidably penetrated into the mounting hole 33, a limit hole 34 for inserting the limit member 3 is provided on the inner wall of the mounting groove 31, an elastic member 35 is provided on the mounting block 32, the elastic member 35 is used to drive the limit member 3 to move in a direction away from the mounting hole 33, and a driving member 36 is provided on the mounting portion 11, the driving member 36 is used to drive the limit member 3 to move in a direction away from the limiting hole 34.

[0032] Reference Figure 4 As an embodiment of the present application, the elastic member 35 is configured as a compression spring, the elastic member 35 is disposed in the mounting hole 33, one end of the elastic member 35 is fixedly connected to the inner wall of the mounting hole 33, and the other end is fixedly connected to the tail of the limit member 3.

[0033] Reference Figure 4 , a through hole 37 is provided on the side wall of the mounting portion 11 which is away from each other, and the through hole 37 is coaxial with and connected to the limiting hole 34. As an embodiment of the present application, the driving member 36 is provided as a push rod, and the driving member 36 is slidably penetrated in the through hole 37. The end of the driving member 36 close to the core assembly 12 is used to abut against the end of the limiting member 3. A connecting member 38 is provided on the mounting portion 11, and the connecting member 38 is used to connect the driving member 36 and the mounting portion 11. In actual use, the driving member 36 is pressed, and the end of the driving member 36 abuts against the end of the limiting member 3. As the driving member 36 moves further, the end of the driving member 36 enters the limiting hole 34, thereby pushing the end of the limiting member 3 out of the limiting hole 34, and at this time, the mounting block 32 can be driven to move in the mounting groove 31.

[0034] Reference Figure 4 As an embodiment of the present application, the connecting member 38 is configured as a spring, and a boss 39 is coaxially fixedly arranged at one end of the driving member 36 away from the limiting member 3, the diameter of the boss 39 is larger than the driving member 36, and the connecting member 38 is sleeved on the driving member 36, one end of the connecting member 38 is fixedly connected to the side wall of the boss 39 close to the limiting member 3, and the other end is fixedly connected to the side wall of the mounting portion 11.

[0035] Reference Figure 4 A ball 301 is embedded in one end of the limiting member 3 away from the mounting hole 33 , and the ball 301 is used for rolling contact with the inner wall of the mounting groove 31 .

[0036] When the core assembly 12 is disassembled and installed, the limit member 3 always has a movement tendency to move away from the mounting hole 33 under the action of the elastic member 35, so that the end of the limit member 3 always abuts against the inner wall of the mounting groove 31, and the sliding friction between the end of the limit member 3 and the inner wall of the mounting groove 31 is converted into rolling friction through the ball 301, which can effectively reduce the sliding friction between the end of the limit member 3 and the inner wall of the mounting groove 31, facilitate the installation and disassembly of the core assembly 12, and reduce the wear between the limit member 3 and the inner wall of the mounting groove 31, thereby increasing the overall service life of the device.

[0037] As an implementation method of this application, refer to Figure 4 A slope 5 is provided at the side opening of the installation groove 31, and the slope 5 is inclined in a direction away from the core assembly 12. By providing the slope 5, the installation of the installation block 32 in the installation groove 31 is further facilitated, thereby further facilitating the operation of the staff.

[0038] The implementation principle of a proppant fracture conductivity testing device proposed in the embodiment of the present application is: In actual use, when it is necessary to replace different core components 12, the position restriction of the core component 12 on the mounting portion 11 by the limiter 3 is released, and the core component 12 can be removed from the mounting portion 11, and then the core component 12 can be replaced. At the same time, the mounting portion 11 can be driven by the drive component 2 to move toward or away from each other, thereby achieving the purpose of adjusting the distance between the two mounting portions 11. The operation is simple and convenient, and has good practicality. An inclined surface is provided at the mouth, and the inclined surface is inclined in the direction away from the core component. By providing the inclined surface, the installation of the mounting block in the mounting groove is further facilitated, thereby further facilitating the operation of the staff.

[0039] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A proppant fracture conductivity testing device, characterized in that: The invention comprises an installation frame (1), a mounting portion (11) is slidably arranged in the installation frame (1), a core assembly (12) is arranged on the installation portion (11), two installation portions (11) are arranged, each installation portion (11) is provided with a core assembly (12), the core assembly (12) is arranged on the side walls of the installation portion (11) close to each other, a driving assembly (2) is arranged in the installation frame (1), the driving assembly (2) is used to drive the installation portion (11) to move in a direction of approaching or moving away from each other, and a limiting member (3) is arranged on the installation portion (11), the limiting member (3) is used to limit the position of the core assembly (12) on the mounting portion (11), an upper inner tube (13) is connected to one end of the mounting frame (1), a lower inner tube (14) is connected to the other end of the mounting frame (1), an inlet tube (15) is provided at one end of the upper inner tube (13) away from the mounting frame (1), an outlet tube (16) is provided at one end of the lower inner tube (14) away from the mounting frame (1), a double-cylinder pump (17) is provided at one end of the inlet tube (15) away from the upper inner tube (13), and a flow test device (18) is provided at one end of the outlet tube (16) away from the lower inner tube (14).

2. A proppant fracture conductivity testing device according to claim 1, characterized in that: A slide groove (4) is provided on the inner wall of the mounting frame (1), wherein two slide grooves (4) are provided, the two slide grooves (4) are respectively arranged on both sides of the upper inner tube (13), the two slide grooves (4) are symmetrically arranged along the axis of the upper inner tube (13), two sliders (41) are provided in each slide groove (4), the two sliders (41) are respectively arranged at both ends of the slide groove (4), the sliders (41) are fixedly connected to the mounting portion (11) in a one-to-one correspondence, and the driving assembly (2) is used for driving the two sliders (41) in the same slide groove (4) to move in a direction of approaching or moving away from each other.

3. A proppant fracture conductivity testing device according to claim 2, characterized in that: The drive assembly (2) comprises a drive motor (21) and a lead screw (22); the drive motor (21) is fixedly mounted on the mounting frame (1); the lead screw (22) is rotatably mounted in the slide groove (4) along the length direction of the slide groove (4); the lead screw (22) is drivingly connected to an output shaft of the drive motor (21); and the slider (41) is threadedly sleeved on the lead screw (22).

4. A proppant fracture conductivity testing device according to claim 3, characterized in that: The lead screw (22) is provided with one, the lead screw (22) is arranged in one of the slide grooves (4), a guide rod (23) is fixedly arranged in the other slide groove (4) along the length direction of the slide groove (4), a guide hole (24) is provided on the slider (41) for the guide rod (23) to slide through, the lead screw (22) is provided as a bidirectional lead screw, and spiral grooves with opposite rotation directions are provided at both ends of the lead screw (22).

5. A proppant fracture conductivity testing device according to claim 1, characterized in that: A mounting groove (31) is provided on the side walls of the mounting portion (11) that are close to each other. One end of the mounting groove (31) is provided with an opening extending therethrough. A mounting block (32) is slidably arranged in the mounting groove (31). The mounting block (32) is fixedly connected to the core assembly (12). The limiting member (3) is used to limit the position of the mounting block (32) in the mounting groove (31).

6. A proppant fracture conductivity testing device according to claim 5, characterized in that: The mounting groove (31) is provided as a T-shaped groove, the mounting block (32) is provided as a T-shaped block matched with the mounting groove (31), the limiting member (3) is provided as a limiting pin, a mounting hole (33) is provided on a side wall of the mounting block (32), the limiting member (3) is slidably inserted into the mounting hole (33), a limiting hole (34) for inserting the limiting member (3) is provided on an inner wall of the mounting groove (31), an elastic member (35) is provided on the mounting block (32), the elastic member (35) is used to drive the limiting member (3) to move in a direction away from the mounting hole (33), and a driving member (36) is provided on the mounting portion (11), the driving member (36) is used to drive the limiting member (3) to move in a direction away from the limiting hole (34).

7. A proppant fracture conductivity testing device according to claim 6, characterized in that: A through hole (37) is provided on the side walls of the mounting portion (11) which are away from each other. The through hole (37) is coaxial with and connected to the limiting hole (34). The driving member (36) is provided as a push rod. The driving member (36) is slidably inserted into the through hole (37). One end of the driving member (36) close to the core assembly (12) is used to abut against the end of the limiting member (3). A connecting member (38) is provided on the mounting portion (11). The connecting member (38) is used to connect the driving member (36) and the mounting portion (11).

8. A proppant fracture conductivity testing device according to claim 7, characterized in that: The connecting member (38) is configured as a spring, and a boss (39) is coaxially fixedly disposed at one end of the driving member (36) away from the limiting member (3), the boss (39) having a diameter larger than the driving member (36), the connecting member (38) being sleeved on the driving member (36), one end of the connecting member (38) being fixedly connected to a side wall of the boss (39) close to the limiting member (3), and the other end being fixedly connected to a side wall of the mounting portion (11).

9. A proppant fracture conductivity testing device according to claim 6, characterized in that: A ball (301) is embedded at one end of the limiting member (3) away from the mounting hole (33), and the ball (301) is used to roll in contact with the inner wall of the mounting groove (31).

10. A proppant fracture conductivity testing device according to claim 9, characterized in that: An inclined surface (5) is provided at the side end opening of the installation groove (31), and the inclined surface (5) is inclined in a direction away from the core assembly (12).

Images