A sand leakage prevention device for a drilling fluid shaker

Abstract

The utility model relates to the technical field of oil and gas drilling industry especially is a kind of drilling fluid vibrating screen sand leakage prevention device, including base, the upper surface of base is installed with connecting mechanism, outer frame is installed on the upper surface of base, the inner wall of outer frame is installed with filter mechanism, the surface of connecting block is fixedly connected with the inner wall of outer frame, the surface of connecting block is equipped with first recess, the inner wall of first recess is movably connected with plane screen, the left, right, rear surface fixed connection of plane screen is in screen body, damping rubber strip is fixedly connected at screen surface fixed connection of screen body, the upper surface of screen body is fixedly connected with gear block, the inner wall of outer frame is fixedly connected with rack, the lower surface of rack and the upper surface of gear block are inlaid, the front of plane screen is fixedly connected with stop baffle.The utility model has very strong applicability in oil and gas drilling industry, can effectively solve the problem of vibrating screen sand leakage, improve the screening efficiency of vibrating screen;Solve the problem of frequent replacement of vibrating plane screen and accessory.

Description

Technical Field

[0001] This utility model relates to the technical field of the oil and gas drilling industry, and in particular to a drilling fluid vibrating screen anti-sand leakage device. Background Technology

[0002] In the process of oil and gas drilling, the function of the vibrating flat screen is to effectively remove harmful solid phases when the drilling fluid passes through the vibrating screen, thereby maintaining the stability of the drilling fluid performance. The screen bed used to filter harmful solid phases in the drilling fluid is called a vibrating screen.

[0003] Traditional flat screen designs often rely on sealing strips to ensure a tight fit between the screen and the frame, preventing sand leakage. However, these sealing strips are prone to aging and wear, leading to frequent sand leakage. To ensure reliable performance of the vibrating screen, regular maintenance of the flat screen and related components, including replacement of the screen and seals, is necessary. Utility Model Content

[0004] In view of this, the present invention provides a sand-leakage prevention device for a drilling fluid vibrating screen. The main technical problem to be solved is that relying on sealing strips to ensure a tight fit between the flat screen and the screen frame to prevent sand leakage is problematic. However, the sealing strips are prone to aging and wear, leading to frequent sand leakage. In other words, the sand leakage problem of the vibrating screen is caused by sealing strip failure.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a drilling fluid vibrating screen anti-sand leakage device, comprising a base, an outer frame, a screen body, a screen mesh, vibration damping rubber strips, and other auxiliary mechanisms. A connecting mechanism is installed on the upper surface of the base. The connecting mechanism includes an outer frame, which is mounted on the upper surface of the base. A filtering mechanism is installed on the inner wall of the outer frame. The filtering mechanism includes a connecting block, the surface of which is fixedly connected to the inner wall of the outer frame. A first groove is formed on the surface of the connecting block, and a flat screen mesh is movably connected to the inner wall of the first groove. The screen body is fixedly connected to the left and right rear surfaces of the flat screen mesh. Vibration damping rubber strips are fixedly connected to the screen mesh on the outside of the screen body. A toothed block is fixedly connected to the upper surface of the screen body. A toothed rack is fixedly connected to the inner wall of the outer frame, with the lower surface of the toothed rack fitting against the upper surface of the toothed block. A backlash baffle is fixedly connected to the front of the flat screen mesh.

[0006] By adopting the above technical solutions and employing a cofferdam-style design, the possibility of sand leakage between the flat screen and the screen body is reduced. Simultaneously, the flat screen utilizes a drawer-embedded design on the specially designed "Z"-shaped connecting screen body, effectively reducing the possibility of sand leakage between the flat screens.

[0007] As a further description of the above technical solution:

[0008] A connecting frame is fixedly connected to the upper surface of the outer frame, a through hole is opened on the back of the outer frame, and a flow guide plate is fixedly connected to the inner wall of the outer frame. The flow guide plate is located on the front side of the screen.

[0009] By adopting the above technical solution, the rock fragments that are finally screened out can flow out along the guide plate.

[0010] As a further description of the above technical solution:

[0011] A feeding mechanism is installed on the upper surface of the base. The feeding mechanism includes a feeding box. The lower surface of the feeding box is fixedly connected to the upper surface of the base. A cover plate is fixedly connected to the upper surface of the feeding box. A first baffle is fixedly connected to the upper surface of the cover plate. A feeding frame is fixedly connected to the upper surface of the cover plate.

[0012] By adopting the above technical solution, the feed frame facilitates the introduction of unfiltered drilling fluid.

[0013] As a further description of the above technical solution:

[0014] The upper surface of the cover plate is movably connected to a second baffle, which is located to the right of the first baffle. A protrusion is fixedly connected to the left side surface of the second baffle, and a second groove is formed on the right side surface of the first baffle, with the protrusion located inside the second groove.

[0015] By adopting the above technical solution, when the drilling fluid is poured, some drilling fluid will fall onto the surface of the cover plate. When the second baffle is moved, the protrusion fixed on the surface of the second baffle is disengaged from the second groove opened on the surface of the first baffle, and the drilling fluid remaining on the surface of the cover plate can be easily cleaned.

[0016] As a further description of the above technical solution:

[0017] A rotating mechanism is installed on the surface of the feed box. The rotating mechanism includes a motor. The output end of the motor is fixedly connected to a rotating shaft. The end of the rotating shaft passes through the feed box and extends into the interior of the feed box. A rotating plate is fixedly connected to the surface of the rotating shaft.

[0018] By adopting the above technical solution, the rotational speed of the rotating plate can be controlled by adjusting the speed of the motor, thereby controlling the output speed of the drilling fluid.

[0019] As a further description of the above technical solution:

[0020] The inner wall of the connecting frame is equipped with a vibration mechanism, which includes a connecting frame. The outer wall of the connecting frame is fixedly connected to the inner wall of the connecting frame. A vibration motor is fixedly connected to the outer wall of the connecting frame. A control component is fixedly connected to the upper surface of the base.

[0021] By adopting the above technical solution, the vibration mechanism is used to shake the flat screen.

[0022] As a further description of the above technical solution:

[0023] A shock-absorbing mechanism is installed on the surface of the outer frame. The shock-absorbing mechanism includes a first connecting plate. The surface of the first connecting plate is fixedly connected to the left side surface of the outer frame. A damper is fixedly connected to the lower surface of the first connecting plate. A second connecting plate is fixedly connected to the end of the damper. The lower surface of the second connecting plate is fixedly connected to the upper surface of the base.

[0024] By adopting the above technical solution, the first connecting plate and the second connecting plate are fixedly connected to the outer frame and the base respectively, and connected in the middle by a damper, which can play a role in shock absorption when the vibration motor installed on the outer frame is working.

[0025] By employing the above technical solution, the drilling fluid vibrating screen anti-sand leakage device of this utility model has at least the following beneficial effects:

[0026] 1. Compared with existing technologies, this drilling fluid vibrating screen anti-sand leakage device, through a flat screen, screen body, and connecting blocks, features a U-shaped anti-leakage dike, ensuring that drilling fluid and solid phases can only flow out from the front and enter the next stage flat screen, reducing sand leakage points between the flat screen and the screen body. Simultaneously, a specially designed Z-shaped connecting screen body and a drawer-embedded design for the flat screen further reduce sand leakage points between the flat screens. The left, right, and rear sides of the device are effectively fixed by the screen body, flat screen, vibration damping strips, and anti-reverse baffles, reducing relative movement between the flat screen and the screen body. Furthermore, drilling fluid and solid phases can only flow within the flat screen dike, eliminating the possibility of inferior solid phases leaking into the drilling fluid through the outer edge of the flat screen. This ensures that inferior solid phases within a specified range are effectively removed from the drilling fluid after screening, guaranteeing drilling fluid performance. At the same time, it effectively improves the screening efficiency of the vibrating screen, meeting the needs of high-volume construction; and effectively reduces the frequency of flat screen replacement, lowering maintenance costs.

[0027] 2. Compared with the prior art, this drilling fluid vibrating screen anti-sand leakage device, through a motor, a rotating shaft, and a rotating plate, has a motor fixed on the surface of the feed box during use. When the motor is started, the rotating shaft fixed at the output end of the motor rotates, and the rotating plate fixedly connected to the surface of the rotating shaft rotates accordingly. The drilling fluid poured from the feed frame falls into the inside of the feed box and comes into contact with the surface of the rotating plate. During the rotation of the rotating plate, the drilling fluid is delivered to the surface of the filtration mechanism. By adjusting the speed of the motor, the output speed of the drilling fluid can be controlled, thus improving the practicality of the device. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a drilling fluid vibrating screen anti-sand leakage device proposed in this utility model;

[0029] Figure 2 This is a schematic diagram of the internal structure of a drilling fluid vibrating screen anti-sand leakage device proposed in this utility model;

[0030] Figure 3 This is a cross-sectional view of a drilling fluid vibrating screen anti-sand leakage device proposed in this utility model;

[0031] Figure 4 This utility model proposes a drilling fluid vibrating screen anti-sand leakage device. Figure 3 Enlarged view of the structure at point A.

[0032] Legend:

[0033] 1. Base; 2. Connecting mechanism; 201. Outer frame; 202. Through hole; 203. Connecting frame; 204. Drainage plate; 3. Filtering mechanism; 301. Connecting block; 302. First groove; 303. Rack; 304. Tooth block; 305. Flat screen; 306. Anti-reverse baffle; 307. Vibration damping strip; 308. Screen body; 4. Feeding mechanism; 401. Feed box; 402. Cover plate; 403. First baffle; 404. Second groove; 405. Second baffle; 406. Protrusion; 407. Feeding frame; 5. Rotating mechanism; 501. Motor; 502. Rotating shaft; 503. Rotating plate; 6. Vibration mechanism; 601. Connecting frame; 602. Vibration motor; 7. Control components; 8. Vibration damping mechanism; 801. First connecting plate; 802. Damper; 803. Second connecting plate. Detailed Implementation

[0034] Reference Figure 1-4This utility model provides a drilling fluid vibrating screen anti-sand leakage device, including a base 1. A connecting mechanism 2 is installed on the upper surface of the base 1. The connecting mechanism 2 includes an outer frame 201, which is installed on the upper surface of the base 1. A filtering mechanism 3 is installed on the inner wall of the outer frame 201. The filtering mechanism 3 includes a connecting block 301, the surface of which is fixedly connected to the inner wall of the outer frame 201. A first groove 302 is formed on the surface of the connecting block 301. A flat screen 305 is movably connected to the inner wall of the first groove 302. The first groove 302 is V-shaped. The flat screen 305 and the screen body 308 are fixed by a drawer-embedded installation, which is a three-dimensional linear fixing method, replacing the old point fixing method of the flat screen 305. This solves the problems of deformation and insecure fixing of the flat screen 305 and reduces the pressure on the flat screen 305 and the screen body 308. The wear between the screens can extend the service life of the drilling fluid vibrating screen. The screen body 308 is fixedly connected to the right side surface of the flat screen 305, and the vibration damping strip 307 is fixedly connected to the right side surface of the screen body 308. Due to the cofferdam design, the reliance on the sealing strip is reduced, and only the vibration damping strip 307 is needed. Therefore, the frequency of replacing the flat screen 305 and sealing strip due to damage, aging, wear, deformation, etc. of the sealing strip can be reduced, which helps to reduce the maintenance cost of the vibrating screen. The toothed block 304 is fixedly connected to the upper surface of the screen body 308. Because this device is equipped with a "U"-shaped anti-leakage cofferdam, the drilling fluid and solid phase can only flow out from the front and enter the next stage flat screen 305, reducing the sand leakage points between the flat screen 305 and the screen body 308. At the same time, a special "Z"-shaped connection screen body 308 is used, and the flat screen 305 adopts a drawer embedded design, which reduces the sand leakage points between the flat screens 305. The device is effectively fixed on the left, right, and rear sides by the screen body 308, the flat screen 305, the vibration damping rubber strip 307, and the anti-reverse baffle 306, reducing the relative movement between the flat screen 305 and the screen body 308. At the same time, the drilling fluid and solid phase can only flow within the cofferdam of the flat screen 305, eliminating the possibility of inferior solid phase leaking into the drilling fluid through the outer edge of the flat screen 305. This ensures that the inferior solid phase within the specified range in the drilling fluid is effectively removed after screening, thus ensuring the performance of the drilling fluid. At the same time, it can effectively improve the screening efficiency of the vibrating screen and meet the needs of large-volume construction; it can effectively reduce the replacement frequency of the flat screen 305 and reduce maintenance costs. The inner wall of the outer frame 201 is fixedly connected with a rack 303. The lower surface of the rack 303 is in contact with the upper surface of the tooth block 304. The front of the flat screen 305 is fixedly connected with a backstop baffle 306. The front of the flat screen 305 is fixed with the backstop baffle 306. The backstop baffle 306 is slightly lower than the upper plane of the flat screen 305. Drilling fluid and solid phase enter the flat screen 305 from the slurry tank.

[0035] A flow guide plate 204 is located on the right side of the outer frame 201. A through hole 202 is provided on the back of the outer frame 201. The flow guide plate 204 is fixedly connected to the inner wall of the outer frame 201. The flow guide plate 204 is located below the flat screen 305, so that the rock chips that are screened out can flow out along the flow guide plate 204. A feeding mechanism 4 is installed on the upper surface of the base 1. The feeding mechanism 4 includes a feeding box 401. The lower surface of the feeding box 401 is fixedly connected to the upper surface of the base 1. A cover plate 402 is fixedly connected to the upper surface of the feeding box 401. A first baffle 403 is fixedly connected to the upper surface of the cover plate 402. A feeding frame 407 is fixedly connected to the upper surface of the cover plate 402. A second baffle 405 is movably connected to the upper surface of the first baffle 403. The second baffle 405 is located to the right of the first baffle 403. A protrusion 406 is fixedly connected to the left side surface of the second baffle 405. A second groove 404 is formed on the right side surface of the first baffle 403, and the protrusion 406 is located inside the second groove 404. When the drilling fluid is poured, some drilling fluid will fall onto the surface of the cover plate 402. When the second baffle 405 is moved, causing the protrusion 406 fixed on the surface of the second baffle 405 to disengage from the second groove 404 formed on the surface of the first baffle 403, the drilling fluid remaining on the surface of the cover plate 402 can be easily cleaned. A rotating... The rotating mechanism 5 includes a motor 501, with a rotating shaft 502 fixedly connected to the output end of the motor 501. The end of the rotating shaft 502 extends through the feed box 401 into its interior. A rotating plate 503 is fixedly connected to the surface of the rotating shaft 502. By adjusting the rotation speed of the motor 501, the rotation speed of the rotating plate 503 can be controlled, thereby controlling the drilling fluid output speed. A vibration mechanism 6 is installed on the inner wall of the connecting frame 203. The vibration mechanism 6 includes a connecting frame 601, with its outer wall fixedly connected to the inner wall of the connecting frame 203. A vibration motor 602 is fixedly connected to the outer wall of the connecting frame 601. The upper surface of the base 1 is fixedly connected to... The system includes a control component 7 and a shock-absorbing mechanism 8 mounted on the surface of the outer frame 201. The shock-absorbing mechanism 8 includes a first connecting plate 801, the surface of which is fixedly connected to the left side surface of the outer frame 201. A damper 802 is fixedly connected to the lower surface of the first connecting plate 801, and a second connecting plate 803 is fixedly connected to the end of the damper 802. The lower surface of the second connecting plate 803 is fixedly connected to the upper surface of the base 1. The first connecting plate 801 and the second connecting plate 803 are fixedly connected to the outer frame 201 and the base 1, respectively, and connected in the middle by the damper 802. This allows the vibration motor 602 mounted on the outer frame 201 to play a shock-absorbing role when it is working.

[0036] Working Principle: A U-shaped anti-leakage dike is installed, allowing drilling fluid and solids to flow only from the front and into the next stage flat screen 305, reducing leakage points between the flat screen 305 and the screen body 308. Simultaneously, a specially designed Z-shaped connection is used for the screen body 308, and the flat screen 305 adopts a drawer-embedded design, further reducing leakage points between the flat screens 305. The left, right, and rear sides of the device are effectively fixed by the screen body 308, flat screen 305, vibration damping strips 307, and anti-reverse baffles 306, reducing relative movement between the flat screen 305 and the screen body 308. Furthermore, drilling fluid and solids can only flow within the dike of the flat screen 305, eliminating the possibility of inferior solids leaking into the drilling fluid through the outer edge of the flat screen 305. This ensures that inferior solids within a specified range are effectively removed from the drilling fluid after screening, guaranteeing the performance of the drilling fluid. Meanwhile, it can effectively improve the screening efficiency of the vibrating screen and meet the needs of large-volume construction; it can effectively reduce the replacement frequency of the flat screen 305 and reduce maintenance costs. The surface of the feed box 401 is fixed with a motor 501. When the motor 501 is started, the rotating shaft 502 fixed at the output end of the motor 501 rotates, and the rotating plate 503 fixedly connected to the surface of the rotating shaft 502 rotates accordingly. The drilling fluid poured from the feed frame 407 falls into the interior of the feed box 401 and comes into contact with the surface of the rotating plate 503. During the rotation, the rotating plate 503 delivers the drilling fluid to the surface of the filter mechanism 3. By adjusting the speed of the motor 501, the output speed of the drilling fluid can be controlled, which improves the practicality of the device.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drilling fluid vibrating screen anti-sand leakage device, comprising a base (1), characterized in that: A connecting mechanism (2) is installed on the upper surface of the base (1). The connecting mechanism (2) includes an outer frame (201), which is installed on the upper surface of the base (1). A filter mechanism (3) is installed on the inner wall of the outer frame (201). The filter mechanism (3) includes a connecting block (301), the surface of which is fixedly connected to the inner wall of the outer frame (201). A first groove (302) is formed on the surface of the connecting block (301), and the inner wall of the first groove (302) is movably connected to the inner wall of the first groove (302). A flat screen (305) is attached, a screen body (308) is fixedly connected to the right side surface of the flat screen (305), a vibration damping rubber strip (307) is fixedly connected to the right side surface of the screen body (308), a toothed block (304) is fixedly connected to the upper surface of the screen body (308), a toothed rack (303) is fixedly connected to the inner wall of the outer frame (201), the lower surface of the toothed rack (303) is in contact with the upper surface of the toothed block (304), and a backstop baffle (306) is fixedly connected to the front side of the flat screen (305).

2. The drilling fluid vibrating screen anti-sand leakage device according to claim 1, characterized in that: A connecting frame (203) is fixedly connected to the upper surface of the outer frame (201), a through hole (202) is opened on the back of the outer frame (201), and a diversion plate (204) is fixedly connected to the inner wall of the outer frame (201). The diversion plate (204) is located on the right side of the outer frame (201).

3. The drilling fluid vibrating screen anti-sand leakage device according to claim 1, characterized in that: The upper surface of the base (1) is equipped with a feeding mechanism (4), which includes a feeding box (401). The lower surface of the feeding box (401) is fixedly connected to the upper surface of the base (1). A cover plate (402) is fixedly connected to the upper surface of the feeding box (401). A first baffle (403) is fixedly connected to the upper surface of the cover plate (402). A feeding frame (407) is fixedly connected to the upper surface of the cover plate (402).

4. The drilling fluid vibrating screen anti-sand leakage device according to claim 3, characterized in that: The upper surface of the cover plate (402) is movably connected to a second baffle (405), the second baffle (405) is located to the right of the first baffle (403), a protrusion (406) is fixedly connected to the left side surface of the second baffle (405), a second groove (404) is provided on the right side surface of the first baffle (403), and the protrusion (406) is located inside the second groove (404).

5. The drilling fluid vibrating screen anti-sand leakage device according to claim 3, characterized in that: A rotating mechanism (5) is installed on the surface of the feed box (401). The rotating mechanism (5) includes a motor (501). The output end of the motor (501) is fixedly connected to a rotating shaft (502). The end of the rotating shaft (502) extends through the feed box (401) into the interior of the feed box (401). A rotating plate (503) is fixedly connected to the surface of the rotating shaft (502).

6. The drilling fluid vibrating screen anti-sand leakage device according to claim 2, characterized in that: The inner wall of the connecting frame (203) is equipped with a vibration mechanism (6), the vibration mechanism (6) includes a connecting frame (601), the outer wall of the connecting frame (601) is fixedly connected to the inner wall of the connecting frame (203), the outer wall of the connecting frame (601) is fixedly connected to a vibration motor (602), and the upper surface of the base (1) is fixedly connected to a control component (7).

7. The drilling fluid vibrating screen anti-sand leakage device according to claim 1, characterized in that: A shock-absorbing mechanism (8) is installed on the surface of the outer frame (201). The shock-absorbing mechanism (8) includes a first connecting plate (801). The surface of the first connecting plate (801) is fixedly connected to the left side surface of the outer frame (201). A damper (802) is fixedly connected to the lower surface of the first connecting plate (801). A second connecting plate (803) is fixedly connected to the end of the damper (802). The lower surface of the second connecting plate (803) is fixedly connected to the upper surface of the base (1).

Images