Particle dynamic trafficability testing device and use method thereof

Abstract

The invention belongs to the technical field of petroleum and natural gas drilling fluid particle dynamic trafficability testing, and particularly relates to a particle dynamic trafficability testing device and a using method thereof. The device comprises a mobile vehicle, a bracket, a fluid pumping mechanism, a liquid storage mechanism and a particle dynamic passing mechanism, the support is vertically connected to the moving trolley and located on one side of the moving trolley. The fluid pumping mechanism is connected to the moving vehicle and connected with the support. The side face of the liquid storage mechanism is fixedly connected to the support, and the bottom face of the liquid storage mechanism is connected with the moving trolley and located above the fluid pumping mechanism. The particle dynamic passing mechanism is vertically connected to the support and connected with the liquid storage mechanism. The device is simple in structure and easy to operate, and experiment results are clearer and more visual. According to the invention, the trafficability of the dynamic drilling fluid under the simulated gap condition can be visually observed, so that the optimization of a field drilling fluid material, especially a plugging material, is guided, the risk of blocking an underground power drilling tool is completely eradicated, and safe and rapid well drilling and completion are ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of testing the dynamic passing ability of particles in oil and gas drilling fluids, and particularly relates to a device for testing the dynamic passing ability of particles and a method for using the same. Background Art

[0002] During the drilling process, due to the pores and cracks in the wellbore, the drilling fluid is consumed. It is necessary to add materials with various forms of particles to the solid-free drilling fluid to plug the pores and cracks in the wellbore, thereby reducing the consumption of the drilling fluid. However, during the drilling process, a fluid is used to drive the downhole motor assembly to complete the tunneling. When it is necessary to plug the pores and cracks in the wellbore, drilling fluid particle materials need to be added. The selected particle materials must first meet the passing ability of the downhole motor assembly. If they cannot meet the requirements, it will inevitably cause the downhole motor assembly to be stuck / fail, leading to downhole complications. However, in the prior art, there is no dedicated equipment and instrument to observe and evaluate the intrusion process of particulate matter into the gaps and pores of the inner wall of the wellbore or the passing ability of the downhole motor assembly.

[0003] Due to production needs, it is imperative to provide a device and method that can be used to observe and evaluate plugging materials. The designed device and method must be able to observe particulate matter, utilize liquid flow, apply a certain pressure in a closed environment, drive the particulate matter to evaluate the passing ability through the liquid flow in simulated pores, cracks or gaps, and observe the passing ability status. During the liquid flow process, the liquid velocity will slow down due to the blockage of the particulate matter invading the pores or cracks, and the liquid velocity data will change; this data change state can be used as evidence for analysis. At the same time, not only can it be visually observed, but the gap and pore simulation module can also be taken out to actually measure the intrusion depth of the pores or cracks. Summary of the Invention

[0004] The present invention provides a device for testing the dynamic passing ability of particles and a method for using the same, aiming to provide an evaluation device and method that can observe and evaluate the effect of plugging materials during use, so as to solve the problems of unsatisfactory plugging effect due to inappropriate proportioning and selection of plugging materials and blockage of downhole motor assemblies during the existing bridge plugging construction process.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A device for testing the dynamic passing ability of particles, comprising

[0007] A mobile vehicle;

[0008] A bracket, which is vertically connected to the mobile vehicle and is located on one side of the mobile vehicle;

[0009] A fluid pumping mechanism, which is connected to a mobile vehicle and is also connected to a support.

[0010] A liquid storage mechanism, the side of which is fixedly connected to the support, the bottom surface of which is connected to the mobile vehicle, and which is located above the fluid pumping mechanism, and the liquid storage mechanism is in communication with the fluid pumping mechanism.

[0011] A particle dynamic passing mechanism, which is vertically connected to the support and is in communication with the liquid storage mechanism.

[0012] The fluid pumping mechanism includes a gearbox, a pump body and a motor; the motor is connected to the support; the motor is connected to the pump body through the gearbox; the pump body has an inlet end and an outlet end, and two outlets are provided at the outlet end of the pump body. One of the outlets is connected with an output connecting pipe, and is connected to the liquid storage mechanism through the output connecting pipe, and the other outlet is connected with a return pipe, and a drain valve is connected to the return pipe.

[0013] An exhaust hole is provided on the side wall of the gearbox, an exhaust valve is connected to the exhaust hole, and an adjusting handwheel is connected to the gearbox.

[0014] The mobile vehicle includes a horizontal plate and rollers; the rollers are connected to the lower surface of the horizontal plate; the support is a frame structure for fixedly connecting the particle dynamic passing mechanism, the fluid pumping mechanism and the liquid storage mechanism.

[0015] The liquid storage mechanism is a liquid storage tank; an upper sealing cover and a liquid inlet pipe are connected to the upper surface of the liquid storage tank; the liquid storage tank is in communication with the top end of the particle dynamic passing mechanism through the liquid inlet pipe; a liquid injection control valve with three groups of valve ports is connected to the liquid inlet pipe, two groups of valve ports in the liquid injection control valve are both in communication with the liquid inlet pipe, and a drain pipe is installed on the other group of valve ports of the liquid injection control valve, and a drain valve is connected to the drain pipe, and the liquid flowing out of the drain pipe enters the liquid storage tank; an electromagnetic liquid flowmeter and a pressure display device are connected to the liquid inlet pipe between the drain valve and the particle dynamic passing mechanism; the flow velocity channel of the electromagnetic liquid flowmeter is consistent with the liquid inlet pipe; a recovery port is opened below the side surface of the liquid storage tank close to the particle dynamic passing mechanism, and the recovery port is in communication with the bottom end of the particle dynamic mechanism; two through holes are provided on the bottom surface of the liquid storage tank, and the two through holes are respectively in communication with the fluid pumping mechanism.

[0016] The particle dynamic passing mechanism at least includes a transparent tube; the transparent tube is a circular tube with both upper and lower openings; a sealing cover is connected to the upper port of the transparent tube, and three through holes with different diameters are opened on the sealing cover. One of the through holes is located at the center of the sealing cover, and a locking screw is vertically connected to this through hole. One of the other two through holes is used to connect with the liquid storage mechanism, and a pressure guiding tube is connected to the remaining through hole. An input joint is connected to the pressure guiding tube, and a pressure reducing device is connected to the pressure guiding tube near the inlet end of the input joint; the lower part of the transparent tube is connected with a filtering mechanism, and the transparent tube is communicated with the liquid storage mechanism through the filtering mechanism.

[0017] The filtering mechanism includes a filtrate recovery tube, a support ring, a seepage component, a lower sealing cover, an outlet control valve and a base; the seepage component is hermetically connected to the inner side wall of the transparent tube, and the bottom of the seepage component is placed on the support ring; a lower sealing cover is connected inside the support ring; the lower sealing cover and the support ring are placed on the base; the lower sealing cover is provided with two liquid outlets, one of the liquid outlets is communicated with the liquid storage mechanism through the filtrate recovery tube, and an outlet control valve is connected to the connecting pipeline of the other liquid outlet; scales are precisely engraved on the outer side wall of the transparent tube.

[0018] A filter disk is hermetically connected to the side wall of the transparent tube below the seepage component, and a sand screen is placed on the filter disk.

[0019] The seepage component is a disk-shaped structure with a slit or hole in the center position, which is used to simulate the real wellbore fracture state or pore state.

[0020] A usage method of a particle dynamic passing performance testing device includes the following steps:

[0021] Step 1: Connect the power supply

[0022] Connect the electromagnetic liquid flowmeter to the 220V power supply; connect the pump body to the 380V power supply;

[0023] Step 2: Lift the locking screw to separate the inlet pipe and the filtrate recovery tube from the transparent tube;

[0024] Step 3: Take out the transparent tube, unscrew the lower sealing cover, and put the seepage component and the filter screen required for the simulation test;

[0025] Step 4: Screw the lower sealing cover into the transparent tube and place it on the base, and put the sealing cover on the top of the transparent tube; after aligning the locking screw to the center position and tightening it, connect the inlet pipe to the sealing cover, and connect the filtrate recovery tube between the liquid storage tank and the lower sealing cover;

[0026] Step 5: Open the liquid injection control valve, and close the outlet control valve, the drain valve and the bleed valve;

[0027] Step 6: Open the upper sealing cover on the liquid storage tank, and inject the prepared test fluid into the liquid storage tank;

[0028] Step 7: Turn on the power switch and the pump body switch; adjust the motor speed by adjusting the gearbox to regulate the flow rate of the fluid, record the data of the liquid entering and filtering out the electromagnetic liquid flowmeter, and observe the passability of the fluid under dynamic conditions; when the liquid level in the transparent tube is too high, close the liquid injection control valve and open the drain valve to let the liquid flow back to the liquid storage tank.

[0029] Step 8: After adjusting the liquid level in the transparent tube to the required level, close the drain valve and open the drain valve to discharge and collect the experimental waste liquid in the liquid storage tank to complete the experiment.

[0030] Step 9: Close the drain valve, add tap water to the liquid storage tank, and repeat Step 7 and Step 8 for multiple cycles of cleaning.

[0031] Step 10: Immediately turn off the pump body switch after draining the liquid inside the liquid storage tank; clean and wipe the liquid storage tank clean, and turn off the power supply.

[0032] Beneficial effects:

[0033] (1) The present invention is composed of a mobile vehicle, a bracket, a fluid pumping mechanism, a liquid storage mechanism, and a particle dynamic passing mechanism, with a simple design structure and easy operation.

[0034] (2) In the present invention, a transparent tube is used as the test cylinder, making the experimental results clearer and more intuitive.

[0035] (3) The fluid pumping mechanism in the present invention can control the flow rate steplessly, and achieve precise control by recording data through the electromagnetic liquid flowmeter, better grasping the effect of the flow rate on the granular material on the simulated gap, and providing more strain data for the actual application of the material in the well site.

[0036] (4) The design of the filter screen in the present invention avoids the blockage of the passage between the liquid storage mechanism and the particle dynamic passing mechanism, ensuring the accuracy of the experimental data.

[0037] (5) The setting of the fluid pumping mechanism in the present invention simulates the situation in a closed environment with a certain pressure applied, and through the liquid flow, drives the granular objects to invade the pores and gaps of the wellbore wall, observing their conditions in the gaps and pores of the inner wall of the wellbore, so that the experiment obtains more practical test data.

[0038] (6) In the present invention, by setting a seepage member simulating the gaps or pores of the inner wall of the wellbore, it is taken out after the experiment and the depth of invasion of the pores or gaps is actually measured to obtain data more accurately.

[0039] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and be able to implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present invention and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0042] Figure 2 It is a schematic diagram of the structure of the seepage member in the present invention.

[0043] Figure 3 It is a schematic diagram of the structure of the sealing pressure cover in the present invention.

[0044] Figure 4 It is a sectional view of the structure of the sealing pressure cover in the present invention.

[0045] Figure 5 It is Figure 1 an enlarged schematic diagram of the structure at A in

[0046] In the figure: 1, mobile vehicle; 2, gearbox; 3, pump body; 4, motor; 5, filtrate recovery pipe; 6, support ring; 7, seepage member; 8, lower sealing cover; 9, sealing pressure cover; 10, transparent pipe; 11, input joint; 12, pressure reducing device; 13, pressure guiding pipe; 14, locking screw; 15, liquid inlet pipe; 16, pressure display device; 17, bracket; 18, exhaust valve; 19, adjusting handwheel; 20, upper sealing cover; 21, liquid injection control valve; 22, drain valve; 23, liquid storage tank; 24, output connecting pipe; 25, return pipe; 26, liquid discharge valve; 27, liquid outlet control valve; 28, base; 29, electromagnetic liquid flowmeter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0048] Embodiment 1:

[0049] According toFigures 1 - 5 A particle dynamic passability test device shown in the figure includes

[0050] a moving vehicle 1;

[0051] a bracket 17, which is vertically connected to the moving vehicle 1 and is located on one side of the moving vehicle 1;

[0052] a fluid pumping mechanism, which is connected to the moving vehicle 1 and is connected to the bracket 17;

[0053] a liquid storage mechanism, the side of which is fixedly connected to the bracket 17, the bottom surface of the liquid storage mechanism is connected to the moving vehicle 1, and is located above the fluid pumping mechanism, and the liquid storage mechanism is communicated with the fluid pumping mechanism;

[0054] a particle dynamic passing mechanism, which is vertically connected to the bracket 17 and is communicated with the liquid storage mechanism.

[0055] In actual use, the moving vehicle 1 can not only conveniently move the device to the test site or recover it to the storage place, but also, with the cooperation of the bracket 17, stably connect and fix the components.

[0056] The setting of the fluid pumping mechanism simulates applying a certain pressure in a closed environment to make the liquid flow, and through the liquid flow, drives the granular object to invade the pores and cracks of the wellbore wall, and observes its condition in the gaps and pores of the inner wall of the wellbore, so that the experiment obtains more actual test data.

[0057] The particle dynamic passing mechanism simulates the gaps or pores in the inner wall of the wellbore. It can not only simultaneously obtain the change data of the experimental materials, but also calculate the data of the discharged filtrate and the final circulation; it can also visually observe the change form of the invaded material under pressure and liquid flow in the gaps in the sealed environment, better master the role of the mud material in the circulation, and provide more strain data for the actual application of the material in the well site.

[0058] Embodiment 2:

[0059] According to Figure 1 a particle dynamic passability test device shown in the figure, the difference from Embodiment 1 is that: the fluid pumping mechanism includes a gearbox 2, a pump body 3 and a motor 4; the motor 4 is connected to the bracket 17; the motor 4 is connected to the pump body 3 through the gearbox 2; the pump body 3 has an inlet end and an output end, and the output end of the pump body 3 is provided with two outlets, one of the outlets is connected with an output connecting pipe 24, and is connected to the liquid storage mechanism through the output connecting pipe 24, and the other outlet is connected with a return pipe 25, and a drain valve 26 is connected to the return pipe 25.

[0060] Further, an exhaust hole is provided on the side wall of the transmission 2, and an exhaust valve 18 is connected to the exhaust hole. An adjusting handwheel 19 is connected to the transmission 2.

[0061] During actual use, the motor 4 is connected to the pump body 3 through the transmission 2. By screwing the adjusting handwheel 19 on the transmission 2, the transmission 2 is adjusted to adjust the rotational speed of the motor 4, so as to achieve the purpose of adjusting the fluid flow rate of the pump body 3.

[0062] The pumping mechanism in this embodiment adopts a screw pump design, with a pressure bearing capacity of up to 3 MPa, and can pass fluids containing centimeter-sized granular materials.

[0063] Embodiment Three:

[0064] According to Figure 1 A particle dynamic passability test device as shown. The difference from Embodiment Two is that the moving vehicle 1 includes a horizontal plate and rollers; the rollers are connected to the lower surface of the horizontal plate; the bracket 17 is a frame structure for fixedly connecting the particle dynamic passing mechanism, the fluid pumping mechanism, and the liquid storage mechanism.

[0065] During actual use, the setting of the rollers makes the movement of the present invention more convenient.

[0066] Embodiment Four:

[0067] According to Figure 1 A particle dynamic passability test device as shown. The difference from Embodiment One is that the liquid storage mechanism is a liquid storage tank 23; an upper sealing cover 20 and a liquid inlet pipe 15 are connected to the upper surface of the liquid storage tank 23; the liquid storage tank 23 is communicated with the top end of the particle dynamic passing mechanism through the liquid inlet pipe 15; a liquid injection control valve 21 with three valve ports is connected to the liquid inlet pipe 15. Two of the valve ports of the liquid injection control valve 21 are both communicated with the liquid inlet pipe 15. Another valve port of the liquid injection control valve 21 is provided with a drain pipe, and a drain valve 22 is connected to this drain pipe. The liquid flowing out of the drain pipe enters the liquid storage tank 23; an electromagnetic liquid flowmeter 29 and a pressure display device 16 are connected to the liquid inlet pipe 15 between the drain valve 22 and the particle dynamic passing mechanism; the flow velocity channel of the electromagnetic liquid flowmeter 29 is consistent with the liquid inlet pipe 15; a recovery port is opened below the side surface of the liquid storage tank 23 close to the particle dynamic passing mechanism, and the recovery port is communicated with the bottom end of the particle dynamic mechanism; two through holes are provided on the bottom surface of the liquid storage tank 23, and the two through holes are respectively communicated with the fluid pumping mechanism.

[0068] During actual use, the prepared test fluid is injected into the liquid storage tank 23 through the hole groove, and then the upper sealing cover 20 is tightened to ensure the airtightness of the liquid storage tank 23.

[0069] Two through holes are provided on the bottom surface of the liquid storage tank 23. One of the through holes is connected to the input end of the pump body 3, and the other through hole is communicated with the output end of the pump body 3 through the output connecting pipe 24. After the motor 4 is started, by adjusting the gearbox 2, the rotation speed of the motor 4 is adjusted, so as to adjust the flow rate of the liquid flowing out of the liquid storage tank 23, passing through the pump body 3 and then entering the liquid storage tank 23. The liquid in the liquid storage tank 23 is pressurized by the fluid pumping mechanism, enters the transparent pipe 10 in the particle dynamic passing mechanism through the liquid inlet pipe 15, and returns to the liquid storage tank 23 through the seepage member 7 and the recovery port, forming a circulating state of the liquid. When the liquid flows through the electromagnetic liquid flowmeter 29, the electromagnetic liquid flowmeter 29 records the data of the liquid entering and filtering out. By comparison, the role of the mud material in the circulation is better grasped, providing more strain data for the actual application of the material at the well site.

[0070] The pressure display device 16 in this embodiment uses a pressure gauge in the prior art to display the pressure value under closed conditions.

[0071] Embodiment Five:

[0072] According to Figure 1 、 Figures 3 - 5 A particle dynamic passing performance test device shown, which is different from Embodiment One in that: the particle dynamic passing mechanism at least includes a transparent pipe 10; the transparent pipe 10 is a circular pipe with both upper and lower openings; a sealing pressure cover 9 is connected to the upper port of the transparent pipe 10, and three through holes with different diameters are opened on the sealing pressure cover 9. One of the through holes is located at the center position of the sealing pressure cover 9, and a locking screw 14 is vertically connected to this through hole. One of the other two through holes is used for connecting with the liquid inlet pipe 15 in the liquid storage mechanism, and a pressure guiding pipe 13 is connected to the remaining through hole. An input joint 11 is connected to the pressure guiding pipe 13, and a pressure reducing device 12 is connected to the pressure guiding pipe 13 near the inlet end of the input joint 11; the lower part of the transparent pipe 10 is connected with a filtering mechanism, and the transparent pipe 10 is communicated with the liquid storage mechanism through the filtrate recovery pipe 5 in the filtering mechanism.

[0073] In actual use, the locking screw 14 is connected to the through hole at the center position on the sealing pressure cover 9 to tighten the sealing pressure cover 9 and ensure the sealing inside the transparent pipe 10. When the pressure inside the transparent pipe 10 is too high, the pressure reducing device 12 is opened to relieve the pressure, ensuring that the experimental data is close to the actual situation. The filtering mechanism simulates the gaps or pores of the wellbore. When granular objects drive into the pores or gaps, the conditions of the pores or gaps are observed, so that the experiment obtains more actual test data. When taken out after the experiment, the depth of the pores or gaps invaded can also be actually measured to obtain data more accurately.

[0074] The pressure reducing device 12 in this embodiment uses a pressure regulating valve in the prior art to control the pressure.

[0075] Example Six:

[0076] According to Figure 1 and Figure 5 A particle dynamic passability test device shown, the difference from Example Five is that: the filtration mechanism includes a filtrate recovery pipe 5, a support ring 6, a seepage member 7, a lower sealing cover 8, a liquid outlet control valve 27 and a base 28; the seepage member 7 is hermetically connected to the inner side wall of the transparent pipe 10, and the bottom of the seepage member 7 is placed on the support ring 6; a lower sealing cover 8 is connected inside the support ring 6; the lower sealing cover 8 and the support ring 6 are placed on the base 28; the lower sealing cover 8 is provided with two liquid outlets, one of the liquid outlets is communicated with the liquid storage mechanism through the filtrate recovery pipe 5, and a liquid outlet control valve 27 is connected to the connecting pipeline of the other liquid outlet; scales are precisely engraved on the outer side wall of the transparent pipe 10.

[0077] In actual use, when the filtration mechanism adopts the above technical solution, it can not only be stably connected to the bracket 17, but also can well complete the test and obtain relevant data. Moreover, after the experiment is over, by opening the liquid outlet control valve 27, the transparent pipe 10 can be conveniently emptied and cleaned.

[0078] The seepage member 7 simulates the real structure of the gaps or pores on the inner wall of the wellbore, and more accurate experimental data is obtained by measuring the intrusion depth of the pores or gaps.

[0079] Scales are precisely engraved on the outer side wall of the transparent pipe 10, which is convenient for recording the volume.

[0080] Example Seven:

[0081] According to Figure 1 and Figure 5 A particle dynamic passability test device shown, the difference from Example Six is that: a filter disk is hermetically connected to the side wall of the transparent pipe 10 below the seepage member 7, and a sand screen is placed on the filter disk.

[0082] Furthermore, the seepage member 7 is a disk-shaped structure with gaps or holes provided at the central position, and is used to simulate the real wellbore fracture state or pore state.

[0083] In actual use, the setting of the filter screen avoids the blockage of the passage between the liquid storage mechanism and the particle dynamic passing mechanism, and ensures the accuracy of the experimental data.

[0084] Example Eight:

[0085] Referring to Figures 1 - 5 , a method for using a particle dynamic passability test device, includes the following steps,

[0086] Step 1. Connect the power supply

[0087] Connect the electromagnetic liquid flowmeter 29 to the 220V power supply; connect the pump body 3 to the 380V power supply;

[0088] Step 2: Lift the locking screw 14 to separate the liquid inlet pipe 15 and the filtrate recovery pipe 5 from the transparent pipe 10;

[0089] Step 3: Take out the transparent pipe 10, unscrew the lower sealing cover 8, and place the seepage parts 7 and the filter screen required for the simulation test;

[0090] Step 4: Screw the lower sealing cover 8 into the transparent pipe 10 and place it on the base 28, and place the sealing and pressing cover 9 on the top of the transparent pipe 10; after aligning the locking screw 14 to the center position and tightening it, connect the liquid inlet pipe 15 to the sealing and pressing cover 9, and connect the filtrate recovery pipe 5 between the liquid storage tank 23 and the lower sealing cover 8;

[0091] Step 5: Open the liquid injection control valve 21, and close the liquid outlet control valve 27, the drain valve 26 and the bleed valve 22;

[0092] Step 6: Open the upper sealing cover 20 on the liquid storage tank 23, and inject the prepared test fluid into the liquid storage tank 23;

[0093] Step 7: Turn on the power switch and the pump body 3 switch; adjust the motor 4 speed by adjusting the gearbox 2 to adjust the fluid flow rate, and record the data of the liquid entering and filtering out the electromagnetic liquid flowmeter 29; observe the fluid passability under dynamic conditions. When the liquid level in the transparent pipe 10 is too high, close the liquid injection control valve 21 and open the bleed valve 22 to let the liquid flow back to the liquid storage tank 23;

[0094] Step 8: After the liquid level in the transparent pipe 10 is adjusted to the required level, close the bleed valve 22, open the drain valve 26, drain and collect the experimental waste liquid in the liquid storage tank 23 to complete the experiment;

[0095] Step 9: Close the drain valve 26, add tap water to the liquid storage tank 23, and repeat Step 7 and Step 8 for multiple cycles of cleaning;

[0096] Step 10: Immediately turn off the pump body 3 switch after the liquid in the liquid storage tank 23 is drained; clean and wipe the liquid storage tank 23, and turn off the power.

[0097] The design of the present invention has a simple structure and is easy to operate. By using the transparent tube 10 as the cylinder for fluid loss, the experimental results are clearer and more intuitive. During the experiment, by comparing the recorded data of the liquid flowing into and out of the electromagnetic liquid flowmeter, a better understanding of the role of the mud material in the circulation is obtained, providing more strain data for the actual application of the material in the well site. In the present invention, the setting of the fluid pumping mechanism simulates a closed environment with a certain pressure applied, and through the liquid flow, drives granular objects to invade the pores and gaps of the wellbore wall, observing their conditions in the pores and gaps of the inner wall of the wellbore, so that the experiment obtains more practical test data. In the present invention, by setting a seepage member simulating the gaps or pores of the inner wall of the wellbore, it is taken out after the experiment and the depth of invasion of the pores or gaps is actually measured to obtain data more accurately.

[0098] The present invention solves the problems in the existing bridge plugging and leakage stoppage construction process, such as the unsatisfactory plugging effect due to inappropriate proportioning and selection of the plugging material, the blockage of downhole motor drills, and the lack of visual dynamic evaluation of the plugging performance of materials in the industry.

[0099] Example Nine:

[0100] Dynamic particle permeability evaluation:

[0101] S1: Connect the power supply: The electromagnetic liquid flowmeter uses a 220V power supply; the pump body 3 uses a 380V power supply.

[0102] S2: Unscrew the union joints of the inlet pipe 15 and the filtrate recovery pipe 5; take out the transparent tube 10.

[0103] S3: Take out the transparent tube 10, unscrew the lower sealing cover 8 with a pipe wrench, and put in the required orifice plate or slit plate and filter screen.

[0104] S4: Screw the lower sealing cover 8 into the transparent tube 10 and place it on the support 17, put the sealing pressure cover 9 on the upper part of the transparent tube 10, place it in the support 17, find the position of the middle locking screw 14, and tighten the locking screw 14 at the correct center position; connect and fix the union joints of the inlet pipe 15 and the filtrate recovery pipe 5 to the upper and lower joints, and put in a round hole slit plate with a pore size of 10mm as the seepage member 7 inside.

[0105] S5: Open the injection control valve 21; open the injection control valve 21, and close the outlet control valve 27, the drain valve 26 and the bleed valve 22.

[0106] S6: Open the upper sealing cover 20 of the liquid storage tank 23, and inject the prepared plugging slurry into the liquid storage tank 23. The plugging slurry formula includes: rigid particles of 0.5mm - 10mm, water-dispersed fibers of 1 - 5mm, and sheet bridge plugging materials of 1 - 3mm.

[0107] S7: Turn on the power switch and the pump body 3 switch; adjust the fluid flow rate by adjusting the motor 4 speed using the handwheel of the gearbox 2. When the liquid level in the transparent tube 10 is too high, close the liquid injection control valve 21 and open the drain valve 22 so that the liquid flows back to the liquid storage tank 23. Run the equipment for a 10-minute test. If there is no blockage and the leak stoppage slurry passes through normally;

[0108] S8: After the liquid level in the transparent tube 10 is adjusted to the required level, close the drain valve 22, open the drain valve 26, drain the experimental waste liquid in the liquid storage tank 23, and collect the filtrate with a mud bucket to complete the experiment;

[0109] S9: Prepare about 50 L of tap water, close the liquid injection control valve 21 and the drain valve 26, add tap water to the liquid storage tank 23, and repeat steps seven and eight for multiple cycles of cleaning;

[0110] Step Ten: Immediately after draining the liquid inside the liquid storage tank 23, turn off the pump body 3 switch; clean and wipe the liquid storage tank 23 for use in the next experiment, and then turn off the power.

[0111] Example Ten:

[0112] Field Application in Well Su 36-0-12C5:

[0113] Basic Situation: After the well was drilled to 2150 m, a fractured lost circulation zone was encountered, resulting in total loss of returns. Downhole motor drill string assembly: bit + positive displacement motor + directional instrument + crossover sub + conventional drill pipe;

[0114] Construction Process: Prepare 25 m of the optimized leak stoppage slurry formula indoors in the circulation tank, 5% rigid particles + 1% water-dispersible fibers + 10% flake plugs, and pump it to the bottom of the well using a drilling pump. 3 , 5% rigid particles + 1% water-dispersible fibers + 10% flake plugs, and pump it to the bottom of the well using a drilling pump.

[0115] Effect Evaluation: After the leak stoppage slurry exited the drill bit nozzle, the drilling fluid returned. After shutting in and squeezing, 20 m of the leak stoppage slurry was squeezed in. 3 The well can withstand an external pressure of 5 MPa. There is no loss of returns during open-hole circulation, the downhole motor drill string assembly operates normally, and normal drilling is resumed.

[0116] The design structure of the present invention is simple and easy to operate. By using a transparent tube as the cylinder body, the experimental results are clearer and more intuitive. During the experiment, the pumping mechanism can control the flow rate steplessly, and accurate control is achieved by recording data through an electromagnetic liquid flowmeter, better grasping the effect of the flow rate on the granular material on the simulated gap, and providing more strain data for the actual application of the material in the well site. The setting of the fluid pumping mechanism in the present invention simulates the evaluation of granular objects driven by liquid flow through the simulated pores, gaps or clearances under a certain pressure in a closed environment, and observes their passability, so that the experiment obtains more practical test data. In the present invention, by setting a seepage member simulating the gaps or pores on the inner wall of the simulated wellbore, it is taken out after the experiment and the depth of intrusion of the pores or gaps is actually measured, and more accurate data is obtained.

[0117] Without conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effects. The specific combinations are not elaborated here one by one.

[0118] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0119] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0120] As described above, it is only the preferred embodiment of the present invention. The present invention will not be limited to these embodiments shown in this article, but rather to the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A particle dynamic passability test device, characterized in that: including a mobile vehicle (1); a bracket (17), which is vertically connected to the mobile vehicle (1) and is located on one side of the mobile vehicle (1); a fluid pumping mechanism, which is connected to the mobile vehicle (1) and is connected to the bracket (17); a liquid storage mechanism, the side surface of which is fixedly connected to the bracket (17), the bottom surface of which is connected to the mobile vehicle (1), and is located above the fluid pumping mechanism, and the liquid storage mechanism is communicated with the fluid pumping mechanism; a particle dynamic passing mechanism, which is vertically connected to the bracket (17) and is communicated with the liquid storage mechanism.

2. The particle dynamic passing test device according to claim 1, characterized in that: The fluid pumping mechanism includes a gearbox (2), a pump body (3) and a motor (4); the motor (4) is connected to the bracket (17); the motor (4) is connected to the pump body (3) through the gearbox (2); the pump body (3) has a liquid inlet end and an output end, and two outlets are arranged at the output end of the pump body (3), one of the outlets is connected with an output connecting pipe (24), and is connected to the liquid storage mechanism through the output connecting pipe (24), and the other outlet is connected with a return pipe (25), and a drain valve (26) is connected to the return pipe (25).

3. The particle dynamic passing performance testing device according to claim 2, characterized in that: An exhaust hole is opened on the side wall of the gearbox (2), and an exhaust valve (18) is connected to the exhaust hole, and an adjusting handwheel (19) is connected to the gearbox (2).

4. The particle dynamic passing test device according to claim 1, characterized in that: The mobile vehicle (1) includes a horizontal plate and rollers; the rollers are connected to the lower surface of the horizontal plate; the bracket (17) is a frame structure for fixedly connecting the particle dynamic passing mechanism, the fluid pumping mechanism and the liquid storage mechanism.

5. The particle dynamic passing test device according to claim 1, characterized in that: The liquid storage mechanism is a liquid storage tank (23); an upper sealing cover (20) and a liquid inlet pipe (15) are connected to the upper surface of the liquid storage tank (23); the liquid storage tank (23) is communicated with the top end of the particle dynamic passing mechanism through the liquid inlet pipe (15); a liquid injection control valve (21) with three valve ports is connected to the liquid inlet pipe (15), two of the valve ports of the liquid injection control valve (21) are communicated with the liquid inlet pipe (15), and a drain pipe is installed at the other valve port of the liquid injection control valve (21), and a drain valve (22) is connected to the drain pipe, and the liquid flowing out of the drain pipe enters the liquid storage tank (23); an electromagnetic liquid flowmeter (29) and a pressure display device (16) are connected to the liquid inlet pipe (15) between the drain valve (22) and the particle dynamic passing mechanism; the flow velocity channel of the electromagnetic liquid flowmeter (29) is consistent with the liquid inlet pipe (15); a recovery port is opened below the side surface of the liquid storage tank (23) close to the particle dynamic passing mechanism, and the recovery port is communicated with the bottom end of the particle dynamic mechanism; two through holes are arranged on the bottom surface of the liquid storage tank (23), and the two through holes are respectively communicated with the fluid pumping mechanism.

6. The particle dynamic passability test device according to claim 1, wherein: The particle dynamic passing mechanism at least includes a transparent tube (10); the transparent tube (10) is a circular tube with both upper and lower openings; a sealing and pressing cover (9) is connected to the upper port of the transparent tube (10), and three through holes with different diameters are opened on the sealing and pressing cover (9). One of the through holes is located at the center of the sealing and pressing cover (9), and a locking screw (14) is vertically connected to this through hole. One of the other two through holes is used to connect with the liquid storage mechanism, and a pressure guiding tube (13) is connected to the remaining through hole. An input joint (11) is connected to the pressure guiding tube (13), and a pressure reducing device (12) is connected to the pressure guiding tube (13) near the inlet end of the input joint (11); the lower part of the transparent tube (10) is connected with a filtering mechanism, and the transparent tube (10) is communicated with the liquid storage mechanism through the filtering mechanism.

7. The particle dynamic passing test device according to claim 6, wherein: The filtering mechanism includes a filtrate recovery tube (5), a support ring (6), a seepage member (7), a lower sealing cover (8), an outlet control valve (27), and a base (28); the seepage member (7) is hermetically connected to the inner side wall of the transparent tube (10), and the bottom of the seepage member (7) is placed on the support ring (6); a lower sealing cover (8) is connected inside the support ring (6); the lower sealing cover (8) and the support ring (6) are placed on the base (28); the lower sealing cover (8) is provided with two liquid outlets, one of the liquid outlets is communicated with the liquid storage mechanism through the filtrate recovery tube (5), and an outlet control valve (27) is connected to the connecting pipeline of the other liquid outlet; scale marks are precisely engraved on the outer side wall of the transparent tube (10).

8. The particle dynamic passing test device according to claim 7, wherein: A filter disk is hermetically connected to the side wall of the transparent tube (10) below the seepage member (7), and a sand screen is placed on the filter disk.

9. A particle dynamic passing performance testing device according to claim 7 or 8, characterized in that: The seepage member (7) is a disk-shaped structure with a slit or hole in the center position, which is used to simulate the real wellbore fracture state or pore state.

10. A method for using a particle dynamic passing test device according to any one of claims 1-9, characterized in that: It includes the following steps Step 1: Connect the power supply Connect the electromagnetic liquid flowmeter (29) to the 220V power supply; connect the pump body (3) to the 380V power supply; Step 2: Lift the locking screw (14) to separate the inlet pipe (15) and the filtrate recovery tube (5) from the transparent tube (10); Step 3: Take out the transparent tube (10), unscrew the lower sealing cover (8), and put the seepage member (7) and the filter screen required for the simulation test; Step 4: Screw the lower sealing cover (8) into the transparent tube (10) and place it on the base (28), and place the sealing and pressing cover (9) on the top of the transparent tube (10); after aligning the locking screw (14) to the center position and tightening it, connect the inlet pipe (15) to the sealing and pressing cover (9), and connect the filtrate recovery tube (5) between the liquid storage tank (23) and the lower sealing cover (8); Step 5: Open the liquid injection control valve (21), and close the outlet control valve (27), the drain valve (26), and the bleed valve (22); Step 6: Open the upper sealing cover (20) on the liquid storage tank (23), and inject the prepared test fluid into the liquid storage tank (23); Step 7: Turn on the power switch and the pump body (3) switch; adjust the speed of the motor (4) by adjusting the gearbox (2) to control the flow rate of the fluid, record the data of the electromagnetic liquid flowmeter (29), and observe the passability of the fluid under dynamic conditions; when the liquid level in the transparent tube (10) is too high, close the liquid injection control valve (21) and open the drain valve (22) to let the liquid flow back to the liquid storage tank (23). Step 8: Observe the fluid for 0 - 10 minutes under dynamic conditions. If there is no blockage, the passability test is satisfied. If blockage occurs, it proves that the system does not meet the passability test; after the experiment is completed, open the drain valve (26) to drain and collect the experimental fluid in the liquid storage tank (23). Step 9: Close the drain valve (26), add tap water to the liquid storage tank (23), and repeat Step 7 and Step 8 for multiple cycles of cleaning. Step 10: Immediately turn off the pump body (3) switch after the liquid in the liquid storage tank (23) is drained completely. Clean and wipe the liquid storage tank (23) clean, and turn off the power supply.

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