Portable detection device and rapid detection method for sand blocking precision of sand control screen pipe

By using a portable gas-carried particle detection device and method, the problems of large size, high cost and low efficiency of existing sand-blocking screen tube detection devices have been solved, and rapid and convenient sand-blocking accuracy detection of screen tubes has been achieved.

CN120992186AActive Publication Date: 2025-11-21CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Application Number
CN202511535671.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-27
Publication Date
2025-11-21
Estimated Expiration
2045-10-27

AI Technical Summary

Technical Problem

Existing sand-blocking screen pipe sand-blocking accuracy testing devices are large in size, not easy to move, and cannot be quickly tested in workshops or construction sites. The testing cost is high and the efficiency is low. In addition, it is necessary to make separate screen pipe short section samples and formation sand with specific particle size distribution.

Method used

A portable detection device was designed that uses gas to carry the detection particles and employs a cavity system, a fixing system, a sealing system, and a suction system to detect intact sieve tubes at different locations. The device is compact and easy to carry, simplifies the detection process, and avoids particle embedding and loss of detection particles caused by liquid carrying force.

Benefits of technology

It enables rapid and convenient detection of sand-blocking accuracy of sand-blocking screens, reduces the weight and volume of the device, reduces detection errors, simplifies the detection process, reduces costs, and improves detection efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention belongs to the technical field of oil and gas development and exploitation engineering, and particularly relates to a portable detection device and a rapid detection method for the sand blocking precision of a sand control screen. According to the invention, the detection of the sand control screen pipe is realized by establishing passage circulation and carrying detection particles by gas, and the detection device is small in weight and size and can be carried about; meanwhile, different complete sand control screen pipes can be detected, an independent screen pipe nipple sample does not need to be manufactured, the detection cost is low, the efficiency is high, and errors are small.
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Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oil and gas development and exploitation engineering, and particularly relates to a portable device for detecting the sand blocking precision of a sand control screen pipe and a rapid detection method. BACKGROUND

[0002] Loose sandstone oil and gas reservoirs are widely distributed in China and the world. However, due to loose cementation and low rock strength, sand production problems are common. Sand production in oil and gas wells can easily damage oil and gas well production equipment, shorten the production cycle of oil wells, reduce oil well production, and even cause oil well shutdown and scrap, which seriously limits the development of oil and gas well productivity. Therefore, for sand-prone reservoirs, sand control is an indispensable process in oil and gas reservoir development, and mechanical sand control screen pipes are the core sand control tool equipment in sand control technology. Different oil and gas reservoirs have different sand production conditions. In order to cope with the complex sand production problems of different oil and gas reservoirs, different types of mechanical screen pipes need to be made. Therefore, mechanical screen pipes have complex structures and various types.

[0003] In order to match the mechanical sand control screen pipe with the sand-prone oil and gas reservoir, it is necessary to test the sand blocking precision of the sand control screen pipe. The sand blocking precision of the sand control screen pipe refers to the maximum particle size value that can pass through the sand control screen pipe, which is related to the maximum slit width or aperture of the sand control screen pipe. The sand blocking precision is a core technical parameter in the design of screen pipe sand control technology, which is used for matching and type selection design optimization with the formation sand, and directly affects the final sand control effect.

[0004] There are various methods for detecting the sand blocking precision of sand control screen pipes. At present, the most widely used method in the petroleum industry is the sand slurry passing method. The operation method is to install a section of screen pipe sample in a test device, prepare a mixture of sand particles and water with a specific concentration and particle size distribution, and let the sand slurry circulate through the screen pipe under a certain pressure difference and flow rate. Finally, the collected outflow sand is analyzed for particle size, and the sand blocking precision of the screen pipe is obtained. For example, Chinese patent CN103063422A provides a device and method for detecting the sand blocking precision of a sand control screen pipe. The sand control screen pipe short section sample is placed in a high-pressure autoclave body, a fluid containing sand particles of different particle sizes is injected into the annulus between the autoclave body and the sample, and a stirring paddle is rotated to stir the fluid to flow out through the sand control screen pipe. The sand blocking precision of the sand control screen pipe sample is obtained by measuring the particle size distribution of the sand particles in the passing fluid. However, (1) the detection device is relatively large and not easy to move, and cannot be used to quickly detect all screen pipe products in the workshop or at the construction site at any time and anywhere, and the detection method is not simple and convenient; (2) the detection method requires the screen pipe to be made into a separate screen pipe short section sample, which is costly; (3) the detection method requires specific particle size distribution of formation sand for different screen pipes, and also requires drying treatment of the collected sand particles and particle size analysis using experimental equipment, which is time-consuming and inefficient. SUMMARY

[0005] To solve the above problems, the application provides a portable device for detecting the sand blocking precision of a sand control screen pipe and a rapid detection method.

[0006] The portable device for detecting the sand blocking precision of a sand control screen pipe comprises a cavity system, a fixing system, a sealing system, a suction system and detection particles.

[0007] The cavity system comprises a detection particle cavity, a cavity cover and a sand passing collection cavity. The cavity cover is detachably arranged above the detection particle cavity to form a semi-closed space with an open bottom for containing the detection particles. The sand passing collection cavity is a semi-closed space with an open top for collecting the passing particles. During detection, the detection particle cavity and the sand passing collection cavity are respectively fixed to the outer surface and the inner surface of the same detection area of the screen pipe by the fixing system.

[0008] The fixing system comprises a cavity fixing clamp. The cavity fixing clamp connects the detection particle cavity and the sand passing collection cavity to fix the detection particle cavity and the sand passing collection cavity to the surface of the screen pipe during detection.

[0009] The bottom opening edge of the detection particle cavity is provided with the sealing system, which comprises a rubber sleeve and a rubber pad arranged in sequence from top to bottom. The top opening edge of the sand passing collection cavity is provided with the sealing system, which comprises a rubber sleeve and a rubber pad arranged in sequence from bottom to top. A permanent magnet is arranged in the rubber pad to ensure that the detection particle cavity and the sand passing collection cavity are tightly attached to the screen pipe during detection, thereby preventing the leakage of the detection particles. The rubber sleeve is made of rubber or silicone with excellent elasticity, which can further compensate for the slight unevenness or curvature change of the surface of the screen pipe on the basis of magnetic adsorption, form a flexible dynamic sealing barrier, and effectively prevent the detection particles from leaking from the edge.

[0010] The suction system comprises a suction pipe and a suction device. An air inlet is arranged on the cavity cover, and an air outlet is arranged at the upper end of the sand passing collection cavity. The suction device is connected to the air inlet and the air outlet through the suction pipe to suck the gas from the sand passing collection cavity and inject the gas into the detection particle cavity, so as to form a directional circulating gas flow in the cavity to drive the detection particles to pass through the screen pipe.

[0011] Preferably, a filter screen is installed at the connection between the sand passing collection cavity and the suction pipe. More preferably, the pore size of the filter screen is smaller than the minimum particle size of the detection particles.

[0012] Preferably, the gas outlet of the suction pipe is provided with a nozzle to reduce the gas flow area, so that the gas in the suction pipe can be sprayed out at a high flow rate to spray and stir the detection particles in the detection particle container, preventing the detection particles from piling up and blocking.

[0013] Preferably, the container cover is sealingly connected to the detection particle container through threads. More preferably, a sealing ring is provided between the container cover and the detection particle container.

[0014] The permanent magnet has strong magnetism, preferably a neodymium magnet.

[0015] Preferably, the container fixing clamp is a pincer clamp, including a clamping part, a hand holding part, and a spring, the clamping part and the hand holding part are connected through a rotating shaft, wherein the clamping part includes a first clamping arm and a second clamping arm, which are respectively connected to the detection particle container and the sand passing collection container. A spring is provided between the first clamping arm and the second clamping arm to provide a continuous and uniform pressing force, ensuring that the sealing system adaptively fits the curved wall of the screen pipe to be tested, further enhancing the sealing and fixing effect. During detection, the detection particle container and the sand passing collection container are fixed to the pipe wall on both sides of the same detection area of the screen pipe to be tested through the container fixing clamp.

[0016] Preferably, the gas outlet direction of the suction pipe is set to deviate from the central axis of the detection particle container, so that the incoming gas flow forms a cyclone in the detection particle container, preventing the detection particles from piling up and blocking. More preferably, the angle between the gas outlet direction of the suction pipe and the central axis of the detection particle container is 20-30°. The central axis is perpendicular to the plane where the bottom opening of the detection particle container is located.

[0017] Preferably, the detection particle container has a cup-shaped structure with a cross-section that gradually decreases from top to bottom, so that the gas introduced by the suction pipe can move closely along the side wall to form a stable and dead-angle-free cyclone field, avoiding the accumulation of detection particles in the corners.

[0018] Preferably, the top opening cross-section of the sand passing collection container is larger than the bottom opening cross-section of the detection particle container, ensuring that the passing particles (i.e., the detection particles passing through the screen pipe to be tested) can enter the sand passing collection container. More preferably, the sand passing collection container has a cup-shaped structure with a cross-section that gradually decreases from top to bottom.

[0019] The suction device is a impeller type electric fan, by adjusting its power to further control the air flow of the suction device, and then control the speed of the detection particles passing through the screen pipe to be tested.

[0020] The sand control screen pipe sand blocking precision portable detection device establishes a gas circulation path, so that the suction device discharges gas into the detection particle container to drive the detection particles to pass through the screen pipe to be tested; the suction device inhales air from the sand passing collection container, so that the passing particles can accurately fall into the sand passing collection container, avoiding the omission of the passing particles.

[0021] The detection particles are spherical particles. Preferably, the detection particles in different particle size ranges are different colors.

[0022] More preferably, the particle size range of the detection particles is 0.01mm-2mm.

[0023] The portable sand screen sand retention precision detection device provided by the application adopts gas-carrying detection particles to detect the sand retention precision of the sand screen, which has the following advantages: first, the detection particles cannot be embedded in the sand screen pores due to the small density and viscosity of the gas and the compression and elasticity of the gas when carrying the detection particles, so that only the detection particles with a particle size equal to or lower than the sand retention precision of the sand screen can pass through, thereby reducing the detection error and the loss of the detection particles; second, the gas is used to drive the detection particles to pass through the sand screen, thereby omitting the process of drying the detection particles in the previous method and simplifying the detection method; and third, compared with the liquid-carrying detection particles that need to be stored in the pump, the gas-carrying detection particles can greatly reduce the size of the suction device, thereby greatly reducing the overall volume and weight of the device and making the device easier to carry and more convenient to detect.

[0024] The application further provides a rapid detection method of the portable sand screen sand retention precision detection device, S1, installing the device and ensuring the air tightness of the detection device; S2, adding detection particles; S3, starting the suction device; S4, after the detection is completed, turning off the suction device; S5, judging the sand retention precision.

[0025] Further, before step S1, the to-be-detected screen pipe is placed horizontally to ensure that the to-be-detected screen pipe is stable, and the pipe wall surface of the to-be-detected area is cleaned to ensure that there is no oil stain, accumulated sand or other impurities that affect sealing and particle passing.

[0026] In step S1, the installation device includes fixing the detection particle cavity and the sand passing collection cavity to the outer surface and the inner surface of the same to-be-detected area of the to-be-detected screen pipe by the cavity fixing clamp respectively, connecting the detection particle cavity and the sand passing collection cavity by the suction system to ensure that the positive pressure side of the suction device is connected to the detection particle cavity, and adjusting the sealing system to make the permanent magnet in the rubber pad adsorb to the surface of the to-be-detected screen pipe.

[0027] In step S1, the airtightness of the detection device comprises: starting the suction device, observing the contact edge of the sand collection cavity with the inner wall of the to-be-detected screen pipe, and detecting whether the contact edge of the detection particle cavity with the outer wall of the to-be-detected screen pipe leaks air; if air leakage is found, the sealing system is adjusted again, and the to-be-detected screen pipe is reattached by using the self-adaptive property of the easily deformable rubber sleeve; if necessary, the device can be temporarily removed, the to-be-detected area of the to-be-detected screen pipe is checked and cleaned, and then the device is reinstalled.

[0028] Step S2 comprises: unscrewing the cavity cover, adding detection particles into the detection particle cavity by using a constant-volume spoon or a weighing method, and re-tightening the cavity cover to ensure the sealed connection between the cavity cover and the detection particle cavity.

[0029] The added amount of the detection particles is 1 / 2 to 2 / 3 of the volume of the detection particle cavity.

[0030] Step S3 comprises: starting the suction device, setting it to work in a cycle mode of “positive pressure blowing-negative pressure suction”, the positive pressure airflow enters the detection particle cavity through the suction pipe, generates disturbance and pushing action on the detection particles, and makes the detection particles rush to the surface of the to-be-detected screen pipe; the negative pressure airflow generates suction in the sand collection cavity, and cooperates with the positive pressure to drive the detection particles with a particle size smaller than the gap of the to-be-detected screen pipe to pass through and fall into the sand collection cavity.

[0031] Step S4 comprises: continuously blowing into the detection particle cavity and sucking from the sand collection cavity until all the detection particles that can pass through the to-be-detected screen pipe have sufficient opportunities to pass through, the detection is ended, and the suction device 8 is turned off.

[0032] Step S5 comprises: when the detection particles of different particle size intervals are different colors, the cavity fixing clamp is pressed to be opened, the largest passing particle corresponding to the color is found, and the particle size of the passing particle is the sand retaining accuracy of the to-be-detected screen pipe.

[0033] Further, the detection method further comprises recovery of the detection particles. The recovery method of the detection particles that do not pass through the to-be-detected screen pipe comprises: unscrewing the cavity cover, and using a non-metal small spoon or a brush to take out all the detection particles remaining in the detection particle cavity. After the passing particles and the detection particles that do not pass through the to-be-detected screen pipe are combined and the dust is removed through a standard screen, the mixture is uniformly mixed and can be reused. Since dry detection particles are used and there is no chemical pollution, the material can be recycled, which is economical and environmentally friendly.

[0034] Compared with the prior art, the advantages of the present application are: 1. The present application greatly reduces the weight and volume of the sand control screen pipe sand retaining accuracy detection device, so that it can be carried on the body and can be detected anytime and anywhere according to the placement position of the sand control screen pipe. 2. The present application can detect various complete screen pipe products without the need to manufacture separate screen pipe short joint samples or sample pieces, thereby reducing the detection cost. 3. This invention eliminates the need for specific particle size distributions of formation sand for different screens, and also eliminates the need to process the collected particles, thus improving the accuracy detection efficiency of sand control screens. 4. This invention uses gas-carried dry detection particles to test the accuracy of sand-proof screen tubes, which greatly reduces the influence of factors such as fluid properties, reduces detection errors, and standardizes test results. Attached Figure Description

[0035] Figure 1 Front view of a portable testing device for the sand-blocking accuracy of sand-control screen pipes; Figure 2 Side view of a portable testing device for the sand-blocking accuracy of sand-control screen pipes; Figure 3 Enlarged detail of a portable testing device for sand-blocking accuracy of sand-control screen tubes; Figure 4 Color cards for colored particles; The components include: 1. Screen tube to be tested; 2. Detected particles; 3. Detected particle cavity; 4. Cavity cover; 5. Suction tube; 6. Spring; 7. Cavity fixing clamp; 8. Suction device; 9. Particles passing through; 10. Sand collection cavity; 11. Rubber sleeve; 12. Rubber pad; 13. Filter screen. Detailed Implementation

[0036] The structural details and implementation methods of the device and technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] Example 1 like Figures 1-3 As shown, the portable detection device for sand blocking accuracy of sand screen tube provided in this embodiment includes a cavity system, a fixing system, a sealing system, a suction system, and a detection particle 2.

[0038] The cavity system includes a particle detection cavity 3, a cavity cover 4, and a sand collection cavity 10. The cavity cover 4 is threadedly connected to the particle detection cavity 3 to form a semi-enclosed space with a bottom opening for holding the particle detection 2; the sand collection cavity 10 is a semi-enclosed space with a top opening for collecting passing particles 9. During testing, the particle detection cavity 3 and the sand collection cavity 10 are respectively fixed to the outer and inner surfaces of the same test area of ​​the sieve tube 1 by a fixing system.

[0039] The bottom opening edge of the detection particle cavity 3 is provided with a sealing system, including a rubber sleeve 11 and a rubber pad 12 arranged in sequence from top to bottom; the top opening edge of the sand passing collection cavity 10 is provided with a sealing system, including a rubber sleeve 11 and a rubber pad 12 arranged in sequence from bottom to top; the rubber pad 12 is provided with a permanent magnet inside, which ensures that the detection particle cavity 3 and the sand passing collection cavity 10 are tightly attached to the screen pipe 1 to be detected during detection, preventing the leakage of detection particles 2 and passing particles 9.

[0040] The fixing system includes a cavity fixing clamp 7; the cavity fixing clamp 7 is a clamp, including a clamping part, a hand holding part and a spring 6, and the clamping part and the hand holding part are connected through a rotating shaft, wherein the clamping part includes a first clamping arm and a second clamping arm, which are respectively connected with the detection particle cavity 3 and the sand passing collection cavity 10. The spring 6 is arranged between the first clamping arm and the second clamping arm to provide continuous and uniform pressing force, so as to ensure that the sealing system is adaptively attached to the curved wall of the screen pipe 1 to be detected, and further enhance the sealing and fixing effect.

[0041] The cavity cover 4 and the detection particle cavity 3 are provided with a sealing ring therebetween.

[0042] The permanent magnet is a neodymium magnet.

[0043] The suction system includes a suction pipe 5 and a suction device 8; the cavity cover 4 is provided with an air inlet, and the sand passing collection cavity 10 is provided with an air outlet, and the suction device 8 is connected with the air inlet and the air outlet through the suction pipe 5, so that the suction device 8 sucks gas from the sand passing collection cavity 10 and injects gas into the detection particle cavity 3, thereby forming a directional circulating gas flow to drive the detection particles 2 to pass through the screen pipe 1 to be detected.

[0044] The suction device 8 is a impeller type electric fan, and the power of the suction device 8 is further adjusted to control the size of the gas flow, and then the speed of the detection particles 2 passing through the screen pipe 1 to be detected is controlled.

[0045] The filter screen 13 is installed at the connection between the sand passing collection cavity 10 and the suction pipe 5, and the pore size of the filter screen 13 is less than 0.01mm.

[0046] The suction pipe 5 is provided with a nozzle at the air outlet end.

[0047] The angle between the air outlet direction of the suction pipe 5 and the central axis of the detection particle cavity 3 is 25°.

[0048] The detection particle cavity 3 and the sand passing collection cavity 10 are both cup-shaped structures, and the inner diameter of the top is 10cm and the inner diameter of the bottom is 7cm.

[0049] The detection particles 2 are colored glass microbeads with a particle size ranging from 0.01 mm to 2 mm. The particle size is divided into 14 different intervals, and the glass microbeads in each interval are set to different colors. The color diagram is shown in FIG. 2. Figure 4 The maximum sand particle size can be quickly determined according to the color of the colored particles by the color of the particles 9.

[0050] Example 2 This example uses the device provided in Example 1 for rapid detection, and the detection method is as follows: (1) Screen pipe positioning and preparation: Place the screen pipe 1 to be tested horizontally to ensure that the screen pipe 1 to be tested is stable, clean the pipe wall surface of the area to be tested to ensure that there are no oil stains, accumulated sand, and other impurities that affect the sealing and particle passage.

[0051] (2) Install the device: The operator holds the device with the thumb and index finger pressing the hand-held part of the cavity fixing clamp 7 to open it, and clamps the device on the area to be tested of the screen pipe 1 to be tested, so that the detection particle cavity 3 is located on the outside of the screen pipe 1 to be tested, and the sand collection cavity 10 is located on the inside of the screen pipe 1 to be tested. Loosen the cavity fixing clamp 7, and under the action of the spring 6, the detection particle cavity 3 and the sand collection cavity 10 are simultaneously pulled towards the pipe wall. At this time, the permanent magnet inside the rubber pad 12 will be quickly attracted to the metal pipe wall, completing the initial alignment and fixation.

[0052] (3) Air tightness check and adjustment: Connect the suction device 8 and the suction tube 5 to the cavity cover 4 and the sand collection cavity 10, and ensure that the positive side of the suction device 8 is connected to the detection particle cavity 3. Start the suction function of the suction device 8, and observe whether there is a gas leakage sound or airflow sensation at the contact edge between the sand collection cavity 10 and the inner wall of the screen pipe 1 to be tested, and the contact edge between the detection particle cavity 3 and the outer wall of the screen pipe 1 to be tested. If gas leakage is found, shake or press the device shell to re-adhere the sealing surface using the self-adaptive feature of the rubber sleeve 11. If necessary, temporarily remove the device, check and clean the sealing surface, and then reinstall it. This step is a prerequisite for ensuring test accuracy, and it is necessary to ensure that the contact edge between the sand collection cavity 10 and the inner wall of the screen pipe 1 to be tested, and the contact edge between the detection particle cavity 3 and the outer wall of the screen pipe 1 to be tested are basically sealed.

[0053] (4) Add detection particles: Unscrew the cavity cover 4, and use a constant-volume spoon or weighing method to add detection particles 2 to the detection particle cavity 3. After the addition is complete, re-tighten the cavity cover 4 to ensure that the sealing ring between the cavity cover 4 and the detection particle cavity 3 is tightly pressed.

[0054] (5) Drive the detection particles through the screen pipe to be tested: start the suction device 8, and set it to work in the cycle mode of "positive pressure blowing-negative pressure suction". The positive pressure airflow enters the detection particle cavity 3 through the suction pipe 5, generates disturbance and pushing effect on the internal detection particles 2, and makes them rush to the surface of the screen pipe 1 to be tested. The negative pressure airflow generates suction in the sand passing collection cavity 10, and cooperates with the positive pressure to drive the detection particles 2 through the screen pipe 1 to be tested and fall into the sand passing collection cavity 10. The process continues for 10 minutes to ensure that all the detection particles 2 that can pass have sufficient opportunity to pass.

[0055] (6) Stop the test: after reaching the predetermined time, turn off the suction device 8.

[0056] (7) Recover the particles that do not pass: unscrew the cavity cover 4, and use a non-metallic small spoon or a brush to take out all the detection particles 2 that do not pass the screen pipe 1 to be tested in the detection particle cavity 3, and put them into a container marked "do not pass".

[0057] (8) Disassemble the device: press the cavity fixing clamp 7 again to open, and take the device off the pipe wall of the screen pipe 1 to be tested.

[0058] (9) Precision determination: loosen the suction pipe 5 connected to the sand passing collection cavity 10, and pour all the passing particles 9 collected in it into a clean flat plate or observation dish. The operator holds a color particle color card (refer to Figure 4 ), and finds out the passing particle 9 with the largest particle size corresponding to the color from the collected passing particles 9 by naked eye observation or with the help of a magnifying glass. The particle size is recognized as the sand retaining precision of the sand screen pipe to be tested. In the embodiment, the color corresponding to the largest particle size in the passing particles 9 is "golden yellow" (0.2-0.3 mm), and it is determined that the sand retaining precision of the sand screen pipe is 0.3 mm.

[0059] (10) Cleaning and recovery: clean all parts of the device, especially the surface of the rubber sleeve 11, with a soft cloth. The "passing particles" and "particles that do not pass" in this test can be mixed after removing the dust through a standard screen and uniformly mixed, and can be reused for the next detection.

Claims

1. A portable device for detecting the sand control screen sand retention rating, characterized in that, Including, cavity system, fixed system, sealing system, suction system, detection particles; The cavity system includes a detection particle cavity, a cavity cover, and a sand collection cavity. The cavity cover is detachably sealed above the detection particle cavity to form a semi-closed space with a bottom opening. The sand collection cavity is a semi-closed space with a top opening. The fixing system includes a cavity fixing clamp. The cavity fixing clamp connects the detection particle cavity and the sand collection cavity, so that the detection particle cavity and the sand collection cavity are fixed to the outer surface and the inner surface of the screen pipe to be detected during detection. The bottom opening edge of the detection particle cavity is provided with a sealing system, including a rubber sleeve and a rubber pad arranged from top to bottom. The top opening edge of the sand collection cavity is provided with a sealing system, including a rubber sleeve and a rubber pad arranged from bottom to top. The rubber pad is internally provided with a permanent magnet. The suction system includes a suction pipe and a suction device. The cavity cover is provided with an air inlet, and the upper end of the sand collection cavity is provided with an air outlet. The suction device is connected to the air inlet and the air outlet through the suction pipe.

2. The portable sand screen pipe sand retention accuracy detection device according to claim 1, wherein The cavity fixing clamp is a clamp type clamp, including a clamping part, a hand holding part and a spring. The clamping part and the hand holding part are connected through a rotating shaft. The clamping part includes a first clamping arm and a second clamping arm, which are connected with the detection particle cavity and the sand collection cavity respectively. The spring is arranged between the first clamping arm and the second clamping arm.

3. The portable sand screen pipe sand retention accuracy detection device according to claim 1, wherein A filter screen is installed at the connection between the sand collection cavity and the suction pipe. The pore size of the filter screen is smaller than the minimum particle size of the detection particles.

4. The portable sand screen pipe sand retention accuracy detection device according to claim 1, wherein The air outlet direction of the suction pipe is arranged to deviate from the central axis of the detection particle cavity. The included angle between the air outlet direction of the suction pipe and the central axis of the detection particle cavity is 20-30°.

5. The portable sand screen pipe sand retention accuracy detection device according to claim 1, wherein A nozzle is arranged at the air outlet port of the suction pipe.

6. The portable sand screen pipe sand retention accuracy detection device according to claim 1, wherein The detection particle cavity has a cup-shaped structure, and the cross section gradually decreases from top to bottom. The top opening cross section of the sand collection cavity is larger than the bottom opening cross section of the detection particle cavity.

7. The portable sand screen pipe sand retention accuracy detection device according to claim 1, wherein The detection particles are spherical particles, and detection particles in different particle size intervals are different colors.

8. A rapid detection method of the device according to any one of claims 1 to 7, characterized in that, Including, S1, installation device, detection device airtightness; S2, add detection particles; S3, start the suction device; S4, after the detection is completed, the suction device is turned off; S5, judge the sand retention accuracy.

9. The rapid detection method according to claim 8, wherein In step S1, the installation device includes fixing the detection particle cavity and the sand passing collection cavity to the outer surface and the inner surface of the same to-be-measured region of the to-be-measured screen pipe respectively by the cavity fixing clamps; connecting the detection particle cavity and the sand passing collection cavity by the suction system, and ensuring that the positive pressure side of the suction device is connected to the detection particle cavity; Adjusting the sealing system to enable the permanent magnet in the rubber pad to be adsorbed to the surface of the to-be-measured screen pipe; the air tightness of the detection device includes starting the suction device, and observing whether the contact edges of the sand passing collection cavity and the inner wall of the to-be-measured screen pipe and the contact edges of the detection particle cavity and the outer wall of the to-be-measured screen pipe leak air; Step S2 includes unscrewing the cavity cover, adding detection particles to the detection particle cavity by using a constant volume spoon or a weighing method, and screwing the cavity cover again; Step S3 includes starting the suction device, and setting the suction device to work in a cycle mode of "positive pressure blowing-negative pressure suction".

10. The rapid detection method according to claim 8, characterized in that, when the detection particles in different particle size intervals are different colors, the method for judging the sand blocking precision is: finding the largest passing particle corresponding to the color of the particle size, and the particle size of the passing particle is the sand blocking precision of the to-be-measured screen pipe.

Citation Information

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