Bridge plug pitching bump pressure simulation test device

Abstract

The utility model relates to the technical field of petroleum drilling and production, in particular to a bridge plug ball throwing bump pressure simulation test device which comprises a liquid storage device, a fracturing ball throwing pipe fitting and a bridge plug seat sealing pipe fitting. The liquid storage device is used for storing test pumping simulation liquid, the fracturing ball throwing pipe fitting is used for throwing a test fracturing ball, one end of the fracturing ball throwing pipe fitting is connected with the pump through a pipeline, the bridge plug setting pipe fitting is used for setting a test bridge plug, one end of the bridge plug setting pipe fitting is connected with the other end of the fracturing ball throwing pipe fitting through a pipeline, and the other end of the bridge plug setting pipe fitting is connected with the pump through a pipeline. And the other end of the bridge plug seat sealing pipe fitting is connected with the liquid inlet through a pipeline. During testing, the pump is started, when the displacement in the pipeline reaches a set value, the fracturing ball is thrown out through the fracturing ball throwing pipe fitting, and the fracturing ball is located on the bridge plug; at the moment, an internal channel of the bridge plug is cut off, fluid in the pipeline is impacted instantly, the pressure in the pipeline between the bridge plug and the pump rises, and the pressure and the flow in the bump pressure state can be read through a pressure meter and a first flow meter on the pipeline.

Description

Technical Field

[0001] This utility model relates to the technical field of oil and gas extraction equipment, specifically to a bridge plug ball-throwing impact simulation test device. Background Technology

[0002] After the bridge plug is set downhole, the tubing string is pulled up to complete the perforation. The tubing string is then pulled out, and a fracturing ball is dropped. The ball lands on the bridge plug, sealing the internal passage of the bridge plug. The wellhead pressure rises, which is called a pressure surge. On-site, the presence and magnitude of the pressure surge are used to indirectly judge the quality of the bridge plug setting.

[0003] In actual oil fracturing operations, the setting performance and impact pressure of bridge plugs directly affect the fracturing effect and the productivity of oil and gas wells. However, current research on the relationship between bridge plug setting quality and impact pressure is insufficient, lacking systematic theoretical support and effective experimental methods. Traditional testing methods cannot accurately simulate complex field conditions, leading to limitations in the evaluation of bridge plug performance and hindering the development and application of bridge plug technology. Therefore, developing a testing device that can realistically simulate the impact pressure of bridge plug ball dropping is of significant practical importance. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a bridge plug ball-throwing impact simulation test device.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A bridge plug ball-dropping impact simulation test device includes a liquid storage device, a fracturing ball delivery pipe, and a bridge plug seat sealing pipe.

[0007] The liquid storage device is used to store the experimental pumpable simulated liquid, and is provided with an outlet and an inlet, with a pump installed at the outlet.

[0008] The fracturing ball delivery fitting is used to deliver test fracturing balls. One end of the fracturing ball delivery fitting is connected to the pump via a pipeline. A pressure gauge and a first flow meter are also provided on the pipeline between the fracturing ball delivery fitting and the pump to measure the pressure and flow rate of the simulated liquid pumped in the pipeline.

[0009] The bridge plug seat fitting is used to seat the test bridge plug. One end of the bridge plug seat fitting is connected to the other end of the fracturing ball delivery fitting via a pipeline, and the other end of the bridge plug seat fitting is connected to the liquid inlet via a pipeline.

[0010] The working principle and beneficial effects of this utility model are as follows: During the simulation test, the simulated liquid is injected into the storage device, and the bridge plug is sealed inside the bridge plug sealing pipe. The fracturing ball delivery pipe, pump, pressure gauge, and first flow meter are connected through pipelines and communicated with the inlet and outlet of the storage device. During the test, the pump is started, and the simulated liquid is pumped through the pipeline, through the fracturing ball delivery pipe and the bridge plug sealing pipe, to the storage device. When the flow rate in the pipeline reaches the set value, the fracturing ball is delivered through the fracturing ball delivery pipe and lands on the bridge plug. At this time, the internal channel of the bridge plug is cut off, and the fluid in the pipeline is subjected to an instantaneous impact. The pressure in the pipeline between the bridge plug and the pump rises, and the pressure and flow rate under this impact state can be read through the pressure gauge and the first flow meter on the pipeline.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the fracturing ball delivery fitting is provided with a retaining ring and a fracturing ball. The retaining ring is a pressure-triggered passage mechanism. When the pressure of the fracturing ball on the retaining ring exceeds a threshold, the retaining ring deforms, allowing the fracturing ball to pass through the retaining ring.

[0013] The beneficial effect of adopting the above-mentioned further solution is that: by pre-placing fracturing balls in the fracturing ball delivery pipe, the fracturing balls in the pipeline are subjected to the thrust of the pumped simulated fluid, and the fracturing balls will exert pressure on the retaining ring. When the pressure of the fracturing balls on the retaining ring exceeds the threshold, the retaining ring deforms, allowing the fracturing balls to pass through the retaining ring, and the fracturing balls will sit on the bridge plug.

[0014] Based on the above technical solution, the present invention can be further improved as follows.

[0015] Furthermore, the retaining ring includes a ring body and multiple spring plates. The ring body has an opening in the middle for the fracturing ball to pass through. The ring body is fixedly connected to the inner wall of the fracturing ball delivery pipe. The ring body has multiple fluid through holes for pumping simulated fluid flow. One end of each of the multiple spring plates is connected to the ring body. The diameter of the opening formed at the other end of each of the multiple spring plates is smaller than the diameter of the fracturing ball. When the pressure of the fracturing ball on the retaining ring exceeds a threshold, the multiple spring plates bend and deform, and the fracturing ball passes through the retaining ring.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the structure is simple and reliable by setting it as a spring-loaded retaining ring structure.

[0017] Based on the above technical solution, the present invention can be further improved as follows.

[0018] Furthermore, the fracturing ball delivery fitting has a double-layer valve channel on its side wall. The double-layer valve channel includes a main channel that communicates with the fracturing ball delivery fitting. The inner diameter of the main channel is larger than the outer diameter of the fracturing ball. The main channel is equipped with a first control valve and a second control valve. The distance between the first control valve and the second control valve is larger than the outer diameter of the fracturing ball.

[0019] The advantages of adopting the above-mentioned further scheme are: by setting up a double-layer valve channel, there is no need to limit the pressure threshold, which can be applied to various pressure conditions and fracturing balls of various sizes, making the test very convenient.

[0020] Based on the above technical solution, the present invention can be further improved as follows.

[0021] Furthermore, it also includes a perforation channel simulator pipe fitting, which is installed on the pipeline at one end of the fracturing ball delivery pipe fitting, and the perforation channel simulator pipe fitting has a perforation channel simulation structure on its pipe wall.

[0022] The beneficial effect of adopting the above-mentioned further scheme is that by setting up a perforation channel simulator fitting, the impact pressure situation of the upper pipe of the bridge plug, including the perforation channel, can be simulated during the test.

[0023] Based on the above technical solution, the present invention can be further improved as follows.

[0024] Furthermore, the perforation channel simulation structure includes several through holes disposed on the pipe wall of the perforation channel simulator fitting, each of the through holes being provided with an overflow valve, and the plurality of overflow valves being connected to the liquid storage device through pipelines.

[0025] The beneficial effects of adopting the above-mentioned further solution are: by setting an overflow valve and connecting it to the liquid storage device, the simulation of the perforation and the recovery of the pumped test liquid are realized.

[0026] Based on the above technical solution, the present invention can be further improved as follows.

[0027] Furthermore, the overflow valve is a threshold adjustable overflow valve.

[0028] The beneficial effect of adopting the above-mentioned further solution is that the threshold adjustable overflow valve can simulate the pressure collision situation under different discharge conditions.

[0029] Based on the above technical solution, the present invention can be further improved as follows.

[0030] Furthermore, a transparent and visible pipe is also provided on the other end of the bridge plug seat fitting.

[0031] The beneficial effects of adopting the above-mentioned further solution are: the transparent and visible pipe fitting is installed at the lower part of the bridge plug seat sealing fitting. When the bridge plug fracturing ball is seated, the flow is blocked at the bridge plug and there is no liquid flow at the lower part. Through the visual sleeve design, the fluid state at the lower part of the bridge plug seat sealing fitting can be directly observed after the bridge plug is seated.

[0032] Based on the above technical solution, the present invention can be further improved as follows.

[0033] Furthermore, a second flow meter is also provided between the transparent and visible pipe and the liquid inlet.

[0034] The beneficial effect of adopting the above-mentioned further scheme is that, in the test, if there is a leak due to poor sealing of the bridge plug, or a leak at the location where the fracturing ball sits, that is, there is still fluid at the bottom of the bridge plug seat sealing pipe, the leakage amount can be recorded by the second flow meter to explore the leakage amount and the situation of impact pressure.

[0035] Based on the above technical solution, the present invention can be further improved as follows.

[0036] Furthermore, a safety control pipeline is provided between the pipeline between the fracturing ball delivery fitting and the pump and the liquid storage device.

[0037] The beneficial effect of adopting the above-mentioned further solution is that when a risk of excessive pipeline pressure occurs during the test, the safety control pipeline is activated to depressurize the pipeline, thereby improving the safety performance of the test device. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the experimental device of this utility model;

[0039] Figure 2 This is a three-dimensional exploded structural diagram of the fracturing ball delivery pipe fitting embodiment 1;

[0040] Figure 3 This is a three-dimensional structural schematic diagram of the fracturing ball delivery fitting embodiment one;

[0041] Figure 4 This is a first-state sectional view of the fracturing ball delivery fitting embodiment 1;

[0042] Figure 5 This is a cross-sectional view of the second state of Embodiment 1 of the fracturing ball delivery fitting;

[0043] Figure 6 This is a cross-sectional view of the bridge plug seat sealing fitting in its first state;

[0044] Figure 7 This is a cross-sectional view of the bridge plug seat sealing fitting in its second state;

[0045] Figure 8This is a cross-sectional view of the pipe fittings in the perforation channel simulator;

[0046] Figure 9 This is a schematic diagram of the structure of the fracturing ball delivery fitting in Embodiment 2;

[0047] Figure 10 This is a cross-sectional view of the first state of Embodiment 2 of the fracturing ball delivery fitting;

[0048] Figure 11 This is a cross-sectional view of the second state of Embodiment 2 of the fracturing ball delivery fitting;

[0049] Figure 12 This is a cross-sectional view of the third state of Embodiment 2 of the fracturing ball delivery fitting.

[0050] The attached diagram lists the components represented by each number as follows:

[0051] 1. Liquid storage device; 11. Liquid inlet; 12. Liquid outlet; 2. Pump; 3. Pipeline; 4. Fracturing ball delivery fitting; 41. Retaining ring; 42. Ring body; 43. Fluid through-hole; 44. Spring; 45. Main channel; 46. First control valve; 47. Second control valve; 5. Bridge plug seat fitting; 51. Test bridge plug; 61. Pressure gauge; 62. First flow meter; 63. Second flow meter; 7. Perforation channel simulator fitting; 71. Overflow valve; 8. Transparent visualization fitting; 9. Safety valve; 10. Test fracturing ball. Detailed Implementation

[0052] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0053] This utility model provides a bridge plug ball-dropping impact simulation test device, including a liquid storage device, a fracturing ball delivery pipe 4, and a bridge plug seat sealing pipe 5.

[0054] The liquid storage device is used to store the simulated liquid for testing pumping, and is provided with an outlet 12 and an inlet 11. A pump is provided at the outlet 12.

[0055] The fracturing ball delivery fitting 4 is used to deliver test fracturing balls. One end of the fracturing ball delivery fitting 4 is connected to the pump 2 via the pipeline 3. The pipeline 3 between the fracturing ball delivery fitting 4 and the pump 2 is also equipped with a pressure gauge 61 and a first flow meter 62 for measuring the pressure and flow rate of the simulated liquid pumped in the pipeline 3.

[0056] Bridge plug seat fitting 5 is used to seat the test bridge plug. One end of the bridge plug seat fitting 5 is connected to the other end of the fracturing ball delivery fitting 4 through the pipeline 3, and the other end of the bridge plug seat fitting 5 is connected to the liquid inlet 11 through the pipeline 3.

[0057] During the simulation test, the simulated pumping fluid is injected into the storage device, and the bridge plug seat is sealed inside the bridge plug seat sealing fitting 5. The fracturing ball delivery fitting 4, pump, pressure gauge 61, and first flow meter 62 are connected through pipeline 3 and connected to the inlet 11 and outlet 12 of the storage device. During the test, the pump is started, and the simulated pumping fluid circulates through pipeline 3, through the fracturing ball delivery fitting 4 and the bridge plug seat sealing fitting 5 to the storage device. When the flow rate in pipeline 3 reaches the set value, the fracturing ball is delivered through the fracturing ball delivery fitting 4, and the fracturing ball seat is sealed on the bridge plug to complete the setting. At this time, the entire pipeline 3 is in a pressure-bearing state, and the pressure in pipeline 3 between the bridge plug and the pump rises. The pressure and flow rate under this pressure-bearing state can be read by the pressure gauge 61 and the first flow meter 62 on pipeline 3, realizing the simulation of the bridge plug delivery pressure-bearing test.

[0058] A schematic diagram of a bridge plug ball-throwing collision simulation device according to a specific embodiment of this utility model is shown below. Figures 1 to 8 ,like Figure 1 As shown, the liquid storage device 1, pump 2, perforation channel simulator fitting 7, fracturing ball delivery fitting 4, bridge plug seat fitting 5, and transparent visualization fitting 8 are sequentially connected from the outlet 12 of the liquid storage device 1 to the inlet 11 of the liquid storage device via pipelines 3. Flanges are used to connect the different fittings to ensure good sealing performance and prevent liquid leakage. Installation and connection are convenient. Furthermore, all components are made of high-strength materials to ensure they can withstand high-pressure environments. A pressure gauge 61 and a first flow meter 62 are respectively installed on the pipeline 3 between the pump and the perforation channel simulator fitting 7. A safety control pipeline is installed between the pump outlet pipeline 3 and the liquid storage device; specifically, a safety valve 9 is installed on the pipeline between the pump outlet pipeline 3 and the liquid storage device.

[0059] See the structural diagram of the perforation channel simulator fitting 7 in this embodiment. Figure 1 and Figure 8 ,like Figure 1 As shown, the perforation channel simulator fitting 7 is installed on pipeline 3 at one end of the fracturing ball delivery fitting 4. The perforation channel simulator fitting 7 has a perforation channel simulation structure on its pipe wall. Specifically, the perforation channel simulation structure includes several through holes on the pipe wall of the perforation channel simulator fitting 7, each through hole equipped with an overflow valve 71. Multiple overflow valves 71 are connected to a liquid storage device via pipelines. Figure 8 As shown, two adjustable overflow valves 71 are installed on the pipe wall directly above the perforation channel simulator fitting 7. The outlets of the two overflow valves 71 are connected to the liquid storage device through pipelines. During the perforation channel simulation operation, the pressure and flow rate under actual perforation conditions are simulated by adjusting the flow rate of the overflow valves 71.

[0060] In this embodiment, the structural schematic diagram of the fracturing ball delivery fitting 4 is shown below. Figures 2 to 5The three-dimensional exploded structure diagram of the fracturing ball delivery fitting 4 in Embodiment 1 is shown below. Figure 2 As shown, a retaining ring 41 and a test fracturing ball 10 are provided at the right end of the fracturing ball delivery pipe 4. The retaining ring 41 is a pressure-triggered passage mechanism. When the pressure of the test fracturing ball 10 on the retaining ring 41 exceeds a threshold, the retaining ring 41 deforms, allowing the test fracturing ball 10 to pass through the retaining ring 41. Specifically, the retaining ring 41 includes a ring body 42 and multiple spring pieces 44. The ring body 42 has an opening in the middle for the test fracturing ball 10 to pass through. The ring body 42 is fixedly connected to the inner wall of the fracturing ball delivery pipe 4, that is, the ring body 42 is fixedly installed on the fracturing ball delivery pipe 4 by screws. The ring body 42 has multiple fluid through holes 43 for pumping simulated fluid flow, that is, the fluid through holes 43 are arranged circumferentially on the ring body 42. One end of the multiple spring pieces 44 is connected to the ring body 42. In this embodiment, the spring pieces 44 and the ring body 42 are an integral structure. The diameter of the opening formed at the other end of the multiple spring pieces 44 is smaller than the diameter of the test fracturing ball 10, that is... Figure 2 As shown, when the spring 44 is in a normal state, the diameter of the formed intermediate through hole is smaller than the diameter of the test fracturing ball 10; when the pressure of the test fracturing ball 10 on the retaining ring 41 exceeds the threshold, multiple springs 44 bend and deform, and the test fracturing ball 10 passes through the retaining ring 41.

[0061] The cross-sectional view of the first state of embodiment 4 of the fracturing ball delivery fitting in this example is shown below. Figure 4 When using the fracturing ball delivery fitting 4 of this embodiment, the test fracturing ball 10 needs to be pre-placed in the pipeline 3, and then the various fittings and pipelines are installed and connected. When there is pumped simulated fluid flowing in the pipeline 3, the fracturing ball will be pushed to the right end of the fracturing ball delivery fitting 4, that is, the fracturing ball is located at the right end of the retaining ring 41. As the flow rate is continuously increased, the pressure on the fracturing ball and the spring 44 gradually increases. When the pressure of the fracturing ball on the retaining ring 41 exceeds the threshold, multiple springs 44 bend and deform, and the fracturing ball passes through the retaining ring 41; Figure 5 As shown, the shrapnel 44 bends to the left under the pressure of the fracturing ball until the fracturing ball passes through.

[0062] For the structural diagram of the bridge plug seat sealing component 5 in this embodiment, please refer to [the diagram]. Figure 6 and Figure 7 Before the test apparatus is assembled, the test bridge plug is seated in the bridge plug seat fitting 5 in a normal working manner, wherein the center tube of the test bridge plug 51 is located at the right end, and then the bridge plug seat fitting 5 is connected to the entire pipeline 3. Figure 6 This indicates that the fracturing ball is not seated on the test bridge plug 51. Figure 7 This indicates that the fracturing ball has been seated on the test bridge plug 51.

[0063] The working process of this embodiment is as follows: the test bridge plug 51 is sealed inside the bridge plug seat fitting 5, the test fracturing ball is placed inside the pipeline 3, and the pumping simulated fluid is placed in the storage device. Then, all fittings and pipeline 3 are installed. The pump is started to pump the pumping simulated fluid into the pipeline 3. The pressure and flow rate in the pipeline 3 are monitored by the pressure gauge 61 and the first flow meter 62. When the pumping flow rate increases to the set value, when the pressure of the pumping fluid through the test fracturing ball 10 on the spring 44 is greater than the pressure threshold of the retaining ring 41, the retaining ring 41 deforms, causing the fracturing ball to pass through the retaining ring 41, and the test fracturing ball 10 sits on the test bridge plug 51. At this time, the internal channel of the test bridge plug 51 is cut off, and the fluid in the pipeline 3 is subjected to an instantaneous impact. The pressure in the pipeline 3 between the test bridge plug 51 and the pump 2 rises. The pressure and flow rate in the pipeline are recorded by the values ​​in the pressure gauge 61 and the first flow meter 62. During this process, a perforation channel simulator test can also be conducted, by opening the overflow valve 71 and adjusting the overflow rate, and detecting the pressure and flow rate in pipeline 3 under perforation conditions.

[0064] Meanwhile, the transparent and visual pipe fitting 8 is installed at the lower part of the bridge plug seat sealing fitting 5. When the bridge plug fracturing ball is seated, the flow is blocked at the bridge plug, and there is no liquid flow at the lower part. Through the visual sleeve design, the fluid state at the lower part of the bridge plug seat sealing fitting 5 can be directly observed after the bridge plug is seated. In the experiment, if there is a leak due to poor bridge plug sealing, there will be a leak at the fracturing ball seat, which means there is still fluid at the lower part of the bridge plug seat sealing fitting 5. The leakage amount can be recorded by the second flow meter 63 to explore the leakage amount and the impact pressure situation.

[0065] If an abnormal condition such as excessive pressure in pipeline 3 occurs during the test, the safety valve 9 on the safety control pipeline is activated to release pressure in pipeline 3, thereby improving the safety performance of the test device.

[0066] The structure of the fracturing ball delivery fitting 4 in Embodiment 2 is shown in the figure. Figures 9 to 12A double-layer valve channel is provided on the side wall of the main body of the pipe fitting. The double-layer valve channel includes a main channel 45 that communicates with the fracturing ball delivery pipe fitting 4. The inner diameter of the main channel 45 is larger than the outer diameter of the fracturing ball. A first control valve 46 and a second control valve 47 are provided on the main channel 45. The distance between the first control valve 46 and the second control valve 47 is larger than the outer diameter of the fracturing ball. By using the fracturing ball delivery pipe fitting 4 in this embodiment, it is not necessary to pre-place the test fracturing ball 10 in the pipeline 3. The fracturing ball is delivered externally. Before the test fracturing ball is delivered, the first control valve 46 and the second control valve 47 are in the closed state. The fracturing ball deployment process is as follows: When the flow rate of the pumped simulated fluid in pipeline 3 reaches the set value, the test fracturing ball 10 is placed above the first control valve 46 on the main channel 45. First, the first control valve 46 is opened, allowing the test fracturing ball 10 to fall below the first control valve 46, and then the first control valve 46 is closed. Then, the second control valve 47 is opened, allowing the test fracturing ball 10 to fall into pipeline 3, and then the second control valve 47 is closed. At this time, the test fracturing ball, under the thrust of the set flow rate, sets the test bridge plug 51. The pressure test record after setting is the same as in Example 1.

[0067] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A bridge plug ball-throwing impact simulation test device, characterized in that, This includes liquid storage devices, fracturing ball delivery fittings, and bridge plug seat sealing fittings; The liquid storage device is used to store the experimental pumpable simulated liquid, and is provided with an outlet and an inlet, with a pump installed at the outlet. The fracturing ball delivery fitting is used to deliver test fracturing balls. One end of the fracturing ball delivery fitting is connected to the pump via a pipeline. A pressure gauge and a first flow meter are also provided on the pipeline between the fracturing ball delivery fitting and the pump to measure the pressure and flow rate of the simulated liquid pumped in the pipeline. The bridge plug seat fitting is used to seat the test bridge plug. One end of the bridge plug seat fitting is connected to the other end of the fracturing ball delivery fitting via a pipeline, and the other end of the bridge plug seat fitting is connected to the liquid inlet via a pipeline.

2. The bridge plug ball-throwing impact simulation test device according to claim 1, characterized in that, The fracturing ball delivery fitting is equipped with a retaining ring and a fracturing ball. The retaining ring is a pressure-triggered passage mechanism. When the pressure of the fracturing ball on the retaining ring exceeds a threshold, the retaining ring deforms, allowing the fracturing ball to pass through the retaining ring.

3. The bridge plug ball-throwing impact simulation test device according to claim 2, characterized in that, The retaining ring includes a ring body and multiple spring plates. The ring body has an opening in the middle through which the fracturing ball passes. The ring body is fixedly connected to the inner wall of the fracturing ball delivery pipe. The ring body has multiple fluid through holes for pumping simulated fluid flow. One end of each of the multiple spring plates is connected to the ring body. The diameter of the opening formed at the other end of each of the multiple spring plates is smaller than the diameter of the fracturing ball. When the pressure of the fracturing ball on the retaining ring exceeds a threshold, the multiple spring plates bend and deform, and the fracturing ball passes through the retaining ring.

4. The bridge plug ball-throwing impact simulation test device according to claim 1, characterized in that, The fracturing ball delivery pipe is provided with a double-layer valve channel on its side wall. The double-layer valve channel includes a main channel that communicates with the fracturing ball delivery pipe. The inner diameter of the main channel is larger than the outer diameter of the fracturing ball. The main channel is provided with a first control valve and a second control valve. The distance between the first control valve and the second control valve is larger than the outer diameter of the fracturing ball.

5. The bridge plug ball-throwing impact simulation test device according to claim 1, characterized in that, It also includes a perforation channel simulator fitting, which is installed on the pipeline at one end of the fracturing ball delivery fitting, and the perforation channel simulator fitting has a perforation channel simulation structure on its pipe wall.

6. The bridge plug ball-throwing impact simulation test device according to claim 5, characterized in that, The perforation channel simulation structure includes several through holes on the pipe wall of the perforation channel simulator fitting, each through hole is equipped with an overflow valve, and the multiple overflow valves are connected to the liquid storage device through pipelines.

7. The bridge plug ball-throwing impact simulation test device according to claim 6, characterized in that, The overflow valve is a threshold adjustable overflow valve.

8. A bridge plug ball-throwing impact simulation test device according to any one of claims 1 to 7, characterized in that, A transparent, visible fitting is also provided on the other end of the pipe of the bridge plug seat fitting.

9. The bridge plug ball-throwing impact simulation test device according to claim 8, characterized in that, A second flow meter is also provided between the transparent and visible pipe and the liquid inlet.

10. A bridge plug ball-throwing impact simulation test device according to any one of claims 1 to 7, characterized in that, A safety control pipeline is provided between the fracturing ball delivery fitting and the pump, and between the liquid storage device.

Images