Sand control choke manifold

Abstract

The application provides a sand-proof throttling well killing manifold, and relates to the technical field of oil exploitation.The sand-proof throttling well killing manifold comprises a first pipeline and a second pipeline, a throttling valve is arranged on the second pipeline, a sand-proof cylinder is arranged between the first pipeline and the second pipeline, a first opening is arranged on one side of the sand-proof cylinder, a second opening is arranged on the other side of the sand-proof cylinder, an upper sealing plate and a lower sealing plate are arranged in the sand-proof cylinder, a communication cavity is formed between the upper sealing plate and the lower sealing plate, a rotating shell is rotatably arranged in the communication cavity, mounting holes are symmetrically arranged on the left side and the right side of the rotating shell, filter screens are arranged in the mounting holes, a driving mechanism is arranged in the sand-proof cylinder, and the driving mechanism is used for driving the rotating shell to rotate in the communication cavity.In the application, the rotating shell is driven to rotate in the communication cavity by the driving mechanism, the filter screens are driven to rotate by the rotating shell, when the filter screens pass through the sand-proof cylinder, the fine sand particles on the surface of the filter screens can be scraped off by the inner wall of the sand-proof cylinder, the filter screens are prevented from being blocked, the cleaning process does not need to stop working, and the continuity of the throttling well killing manifold operation is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil exploitation, in particular to a sand-proof throttling well killing manifold. BACKGROUND

[0002] The throttling well killing manifold is a core equipment for controlling the pressure in the well and preventing blowout accidents during oil drilling, which is composed of multiple pipes, valves and supporting control systems, mainly including a throttling manifold and a well killing manifold. The core function is to balance the bottom hole pressure and the formation pressure by adjusting the fluid flow and pressure, prevent well kick and ensure the safety of the wellhead.

[0003] A sand-proof throttling well killing manifold is disclosed in Chinese Patent No. CN116696270B, which relates to the technical field of oilfield well killing. The sand-proof mechanism is provided with an inlet pipe and an outlet pipe. A short connection is connected to the left side of the throttling valve through a flange seal. The short connection is connected to ball valve B through a flange seal. Ball valve B is connected to the outlet pipe through a flange seal. The sand-proof mechanism and the lower part of the short connection are connected to the bottom pry through the support leg. The left side of the inlet pipe of the sand-proof mechanism is horizontally arranged. The right side of the inlet pipe is inclined downward at an angle of 30°. The right side of the inlet pipe is connected to the reducing pipe and the sand setting pipe. A butt joint pipe B is welded to the upper part of the sand setting pipe. The butt joint pipe B extends horizontally to the right. The butt joint pipe B is connected to the butt joint pipe A through a flange seal. A limiting ring is fixedly connected to the left side of the inner hole of the butt joint pipe A. A filter screen is installed in the limiting ring. By setting the sand setting piston and the sand discharge piston combination, the perforation sand can be automatically discharged from the sand setting pipe without manual operation. The labor is reduced, and the normal pressure safe sand discharge can be realized. The well killing throttling manifold can work continuously.

[0004] In the above-mentioned scheme, the filter screen can intercept small sand particles to reduce the impact of fluid on the throttling valve. To prevent the filter screen from being blocked, the small sand particles intercepted by the filter screen need to be cleaned regularly. However, the flange connection between the butt joint pipe A and the butt joint pipe B needs to be disconnected during cleaning, which leads to downtime maintenance and affects the continuity of the throttling well killing manifold operation. SUMMARY

[0005] The present application provides a sand-proof throttling well killing manifold to solve the technical problem that the filter screen needs to be cleaned regularly, which affects the continuity of the throttling well killing manifold operation.

[0006] To solve the above technical problems, the application discloses a sand-proof throttling well killing manifold, which comprises a first pipeline and a second pipeline, a throttling valve is arranged on the second pipeline, a sand-proof cylinder is arranged between the first pipeline and the second pipeline, a first opening is arranged on one side of the sand-proof cylinder, a second opening is arranged on the other side of the sand-proof cylinder, an upper sealing plate and a lower sealing plate are arranged in the sand-proof cylinder, a communication cavity is formed between the upper sealing plate and the lower sealing plate, the communication cavity is communicated with the first pipeline through the first opening, the communication cavity is communicated with the second pipeline through the second opening, a rotating shell is rotatably arranged in the communication cavity, mounting holes are symmetrically arranged on the left and right sides of the rotating shell, filter screens are arranged in the mounting holes, a driving mechanism is arranged in the sand-proof cylinder, and the driving mechanism is used for driving the rotating shell to rotate in the communication cavity.

[0007] Preferably, the driving mechanism comprises a servo motor, the servo motor is arranged on the lower surface of the cover plate, the cover plate is detachably connected with the upper end of the sand-proof cylinder, a driving gear is arranged on the output end of the servo motor, a rotating shaft is arranged on the upper end of the rotating shell, the rotating shaft penetrates through the upper sealing plate and is rotationally connected with the cover plate, and a driven gear is arranged on the rotating shaft.

[0008] Preferably, the driving gear is an incomplete gear.

[0009] Preferably, a reciprocating screw is arranged on the output end of the servo motor, the lower end of the reciprocating screw is rotationally connected with a fixed plate, the fixed plate is connected with the inner wall of the sand-proof cylinder, a moving seat is slidably arranged on the reciprocating screw, the moving seat is slidably connected with the inner wall of the sand-proof cylinder on the upper and lower sides of the moving seat, a plurality of spring rods are arranged on the bottom of the moving seat, and a limiting assembly is arranged below the spring rods.

[0010] Preferably, the limiting assembly comprises a positioning hole, the positioning hole is arranged in the upper sealing plate, a plurality of sliding holes are arranged on the inner wall of the positioning hole, a guide block is slidably arranged in the sliding hole, the guide block is connected with the inner wall of the sliding hole through a return spring, a limiting plate is slidably arranged in the positioning hole, the outer wall of the limiting plate is connected with the guide block, a clamping column is arranged on the lower surface of the limiting plate, the lower end of the clamping column extends into the limiting hole, and the limiting hole is arranged on the upper surface of the rotating shell.

[0011] Preferably, a rolling element is arranged on the lower end of the clamping column.

[0012] Preferably, a groove is arranged on the inner wall of the front side of the sand-proof cylinder, one end of the groove is communicated with the first opening, a sand discharging hole is arranged in the lower sealing plate, the upper end of the sand discharging hole is communicated with the end of the groove away from the first opening, a sealing hole is arranged on the outer wall of the side of the rotating shell close to the first opening, a sealing baffle is slidably arranged in the sealing hole, and the sealing baffle is connected with the inner wall of the sealing hole through a compression spring.

[0013] Preferably, the depth of the groove gradually decreases from the end close to the first opening to the end away from the first opening.

[0014] Preferably, a sand discharging port is arranged on the bottom of the sand-proof cylinder.

[0015] Preferably, a fixed ring is arranged below the lower sealing plate, and a sand guiding hole is arranged in the fixed ring, the sand guiding hole being funnel-shaped.

[0016] The technical scheme of the present application has the following advantages: the present application provides a sand-proof throttling well killing manifold, relating to the technical field of oil exploitation, comprising a first pipeline and a second pipeline, a throttling valve is arranged on the second pipeline, a sand-proof cylinder is arranged between the first pipeline and the second pipeline, a first opening is arranged on one side of the sand-proof cylinder, a second opening is arranged on the other side of the sand-proof cylinder, an upper sealing plate and a lower sealing plate are arranged in the sand-proof cylinder, a communication cavity is formed between the upper sealing plate and the lower sealing plate, a rotating shell is rotatably arranged in the communication cavity, mounting holes are symmetrically arranged on the left and right sides of the rotating shell, filter screens are arranged in the mounting holes, a driving mechanism is arranged in the sand-proof cylinder, and the driving mechanism is used to drive the rotating shell to rotate in the communication cavity. In the present application, the rotating shell is driven by the driving mechanism to rotate in the communication cavity, and the rotating shell drives the filter screens to rotate, when the filter screens pass through the sand-proof cylinder, the fine sand particles on the surface of the filter screens can be scraped off by the inner wall of the sand-proof cylinder, so that the filter screens are prevented from being blocked, and the cleaning process does not need to stop operation, thereby ensuring the continuity of the throttling well killing manifold operation.

[0017] Additional features and advantages of the application are set forth in the detailed description which follows, and in part will be apparent to those skilled in the art from that description, or can be learned by practice of the application. The purposes and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and claims hereof.

[0018] The technical scheme of the present application is described in detail below with the aid of the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and serve to explain the present application and do not limit the present application. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the sand-proof throttling well killing manifold of the present application;

[0021] Figure 2 It is a schematic diagram of the overall structure of the sand-proof throttling well killing manifold of the present application; Figure 1 It is a partial structure sectional view at A-A in the present application;

[0022] Figure 3 It is an enlarged view of the structure at B in the present application; Figure 2

[0023] Figure 4 It is an enlarged view of the structure at C in the present application; Figure 2

[0024] Figure 5 It is an enlarged view of the structure at D in the present application; Figure 1 ​​​

[0025] Figure 6 Figure is a schematic diagram of the sand drainage pipe structure in the present application;

[0026] Figure 7 Figure is a schematic diagram of the sand drainage pipe structure in the present application; Figure 6 Figure is a schematic diagram of the sand drainage pipe structure in the present application;

[0027] Figure: 1, first pipeline; 2, second pipeline; 3, sand prevention cylinder; 4, upper sealing plate; 5, lower sealing plate; 6, rotating shell; 7, filter screen; 8, servo motor; 9, cover plate; 10, driving gear; 11, rotating shaft; 12, driven gear; 13, reciprocating lead screw; 14, fixed plate; 15, moving seat; 16, spring rod; 17, positioning hole; 18, sliding hole; 19, guide block; 20, return spring; 21, limiting plate; 22, clamping column; 23, limiting hole; 24, groove; 25, sand drainage hole; 26, sealing hole; 27, sealing baffle; 28, compression spring; 29, sand drainage port; 30, fixing ring; 31, sand drainage pipe; 32, bottom plate; 33, sealing cylinder; 34, sand prevention screen; 35, moving shaft; 36, scraper; 37, driving motor; 38, moving sleeve; 39, driving shaft; 40, long sliding hole; 41, connecting hole; 42, driving rod; 43, recovery cylinder; 44, piston block; 45, recovery cavity; 46, piston rod; 47, first pipe body; 48, second pipe body. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present application will be described herein below with reference to the drawings; it should be understood, however, that the described preferred embodiments are intended to be illustrative only and are not intended to limit the present application.

[0029] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description, and are not intended to particularly indicate the order or sequence, nor to limit the present application, which are merely for distinguishing the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features of various embodiments can be combined with each other, but it must be based on the realization of a person skilled in the art, when the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0030] Example 1:

[0031] The present application provides a sand prevention throttling well killing manifold, which comprises a first pipeline and a second pipeline, Figures 1-7As shown, it comprises: a first pipeline 1 and a second pipeline 2, a throttle valve is arranged on the second pipeline 2, a sand prevention cylinder 3 is arranged between the first pipeline 1 and the second pipeline 2, a first opening is arranged on one side of the sand prevention cylinder 3, a second opening is arranged on the other side, an upper sealing plate 4 and a lower sealing plate 5 are arranged in the sand prevention cylinder 3, a communication cavity is formed between the upper sealing plate 4 and the lower sealing plate 5, the communication cavity is communicated with the first pipeline 1 through the first opening, the communication cavity is communicated with the second pipeline 2 through the second opening, a rotating shell 6 is rotatably arranged in the communication cavity, mounting holes are symmetrically arranged on the left and right sides of the rotating shell 6, filter screens 7 are arranged in the mounting holes, a driving mechanism is arranged in the sand prevention cylinder 3, and the driving mechanism is used to drive the rotating shell 6 to rotate in the communication cavity.

[0032] The working principle and beneficial effects of the above technical scheme are as follows: the throttle well control manifold comprises the first pipeline 1, the sand prevention cylinder 3 and the second pipeline 2, the sand prevention cylinder 3 is located between the first pipeline 1 and the second pipeline 2, fluid flows to the sand prevention cylinder 3 through the first pipeline 1, enters the communication cavity through the first opening, then enters the rotating shell 6 through the first filter screen 7, and then flows to the second opening through the second filter screen 7, and then flows into the second pipeline 2 through the second opening, the throttle valve is arranged on the second pipeline 2, the fluid flow in the second pipeline 2 can be controlled through the throttle valve, the two filter screens 7 are arranged oppositely, the fine sand particles in the fluid can be intercepted through the arrangement of the filter screens 7, so that the impact of the fine sand particles on the throttle valve is reduced, and the service life of the throttle valve is prolonged, as the number of fine sand particles intercepted by the filter screens 7 increases, the filter screens 7 are prone to be blocked, therefore, the driving mechanism is arranged, the rotating shell 6 is driven to rotate in the communication cavity through the driving mechanism, the upper surface of the rotating shell 6 is in contact with the lower surface of the upper sealing plate 4, and the lower surface of the rotating shell 6 is in contact with the upper surface of the lower sealing plate 5, so as to ensure the sealing effect of the upper sealing plate 4 and the lower sealing plate 5, the rotating shell 6 drives the filter screens 7 to rotate, when the filter screens 7 pass through the sand prevention cylinder 3, the fine sand particles on the surface of the filter screens 7 can be scraped off by the inner wall of the sand prevention cylinder 3, so as to prevent the filter screens 7 from being blocked, and the cleaning process does not need to stop working, so that the continuity of the throttle well control manifold operation is ensured.

[0033] Embodiment 2:

[0034] On the basis of the above embodiment 1, as shown, Figures 1-5 the driving mechanism comprises a servo motor 8, the servo motor 8 is arranged on the lower surface of a cover plate 9, the cover plate 9 is detachably connected with the upper end of the sand prevention cylinder 3, a driving gear 10 is arranged on the output end of the servo motor 8, a rotating shaft 11 is arranged on the upper end of the rotating shell 6, the rotating shaft 11 penetrates through the upper sealing plate 4 and is rotatably connected with the cover plate 9, and a driven gear 12 is arranged on the rotating shaft 11.

[0035] The driving gear 10 is an incomplete gear;

[0036] The servo motor 8 is provided with a reciprocating screw rod 13 at the output end, the lower end of the reciprocating screw rod 13 is rotationally connected with a fixed plate 14, the fixed plate 14 is connected with the inner wall of the sand prevention cylinder 3, the reciprocating screw rod 13 is slidably provided with a moving seat 15, the front and rear sides of the moving seat 15 are slidably connected with the upper and lower inner walls of the sand prevention cylinder 3, a plurality of spring rods 16 are arranged at the bottom of the moving seat 15, and a limiting assembly is arranged below the spring rods 16;

[0037] The limiting assembly comprises a positioning hole 17 arranged in the upper sealing plate 4, a plurality of sliding holes 18 are arranged on the inner wall of the positioning hole 17, a guide block 19 is slidably arranged in the sliding hole 18, the guide block 19 is connected with the inner wall of the sliding hole 18 through a reset spring 20, a limiting plate 21 is slidably arranged in the positioning hole 17, the outer wall of the limiting plate 21 is connected with the guide block 19, a clamping column 22 is arranged on the lower surface of the limiting plate 21, the lower end of the clamping column 22 extends into a limiting hole 23 arranged on the upper surface of the rotating shell 6;

[0038] The lower end of the clamping column 22 is provided with a rolling element.

[0039] The working principle and beneficial effects of the above technical scheme are as follows: the servo motor 8 is periodically started according to a preset time length, so that the automatic cleaning of the filter screen 7 is realized without manual participation, and the labor intensity of the workers is reduced. Initially, the lower end of the clamping column 22 is inserted into the limiting hole 23, and the moving seat 15 is located at the lowermost position. At this time, the rolling element is in contact with the bottom wall of the limiting hole 23, the spring rod 16 is in a compressed state, and the reset spring 20 is in a stretched state. Under the downward pressing action of the spring rod 16, the clamping column 22 is in close cooperation with the limiting hole 23, preventing the rotating shell 6 from rotating, thereby improving the stability of the filter screen 7 and ensuring the smooth passage of fluid through the filter screen 7. After a preset time length, the number of fine sand particles on the surface of the filter screen 7 increases, and the servo motor 8 is automatically started. When the servo motor 8 is started, it can drive the reciprocating screw 13 to rotate. Since the moving seat 15 is slidably connected to the inner wall of the sand prevention cylinder 3 at the front and rear sides, the rotation of the reciprocating screw 13 can drive the moving seat 15 to move upward along the reciprocating screw 13. The moving seat 15 drives the spring rod 16 to move upward, and the spring rod 16 gradually extends and separates from the upper surface of the limiting plate 21. Under the action of the reset spring 20, the guide block 19 slides upward along the inner wall of the sliding hole 18, thereby driving the limiting plate 21 to slide upward in the positioning hole 17. The limiting plate 21 drives the clamping column 22 to move upward, and the clamping column 22 separates from the limiting hole 23. The driving gear 10 is an incomplete gear. When the clamping column 22 separates from the limiting hole 23, the driving gear 10 meshes with the driven gear 12, and the driving gear 10 drives the driven gear 12 to rotate. The driven gear 12 drives the rotating shaft 11 to rotate in the upper sealing plate 4, and the rotating shaft 11 drives the rotating shell 6 to rotate between the upper sealing plate 4 and the lower sealing plate 5. When the filter screen 7 close to the first pipeline 1 rotates to contact the inner wall of the sand prevention cylinder 3, the fine sand particles on the surface of the filter screen 7 can be intercepted through the inner wall of the sand prevention cylinder 3, thereby cleaning the surface of the filter screen 7. While the rotating shaft 11 rotates, the reciprocating screw 13 rotates and drives the moving seat 15 to move. When the moving seat 15 reaches the highest threaded position of the reciprocating screw 13, the moving seat 15 starts to move downward. The moving seat 15 drives the spring rod 16 to move downward, and the rolling element at the lower end of the spring rod 16 contacts the limiting plate 21 and drives the limiting plate 21 to slide downward. The limiting plate 21 drives the clamping column 22 to move downward, and the rolling element at the lower end of the clamping column 22 contacts the upper surface of the rotating shell 6. The rolling element can be a ball, which can roll along the upper surface of the rotating shell 6, thereby reducing the friction between the clamping column 22 and the upper surface of the rotating shell 6 and reducing the wear of the clamping column 22, thereby prolonging the service life of the clamping column 22. During the downward movement of the moving seat 15, the spring rod 16 is gradually compressed, and the pressure of the rolling element on the upper surface of the rotating shell 6 gradually increases. When the driving gear 10 separates from the driven gear 12, the rotating shell 6 rotates 180°, and the limiting hole 23 reaches directly below the clamping column 22. Under the action of the spring rod 16, the clamping column 22 is inserted into the limiting hole 23, thereby limiting the rotating shell 6. At this time, the servo motor 8 automatically stops working. Through the cooperation of the clamping column 22 and the limiting hole 23,The stability of the rotating shell 6 is improved, and the fluid can smoothly pass through the filter screen 7 after being filtered and enter the second pipeline 2. By arranging the driving mechanism, the rotating shell 6 can be driven to stably rotate by 180°, so that the fine sand accumulated on the surface of the filter screen 7 is scraped off, manual shutdown and cleaning of the filter screen 7 are not required, and the sustainable work of the choke and kill manifold is ensured.

[0040] Embodiment 3

[0041] On the basis of Embodiment 1 or 2, as shown in Figures 2-4 a groove 24 is arranged on the inner wall of the front side of the sand prevention cylinder 3, one end of the groove 24 is communicated with the first opening, a sand discharging hole 25 is arranged in the lower sealing plate 5, the upper end of the sand discharging hole 25 is communicated with the end of the groove 24 away from the first opening, a sealing hole 26 is arranged on the outer wall of the side of the rotating shell 6 close to the first opening, a sealing baffle 27 is slidably arranged in the sealing hole 26, and the sealing baffle 27 is connected with the inner wall of the sealing hole 26 through a compression spring 28;

[0042] The depth of the groove 24 gradually decreases from the end close to the first opening to the end away from the first opening.

[0043] The working principle and beneficial effects of the above technical solution are as follows: initially, under the action of the compression spring 28, the sealing baffle 27 is in contact with the inner wall of the groove 24, the sealing baffle 27 plays a sealing role, the fluid in the first pipeline 1 cannot flow into the groove 24, and the surface of the filter screen 7 close to the first pipeline 1 can intercept fine sand in the fluid, after a preset time, the servo motor 8 is automatically started and drives the rotating shell 6 to rotate, the rotating shell 6 drives the filter screen 7 to rotate when rotating, the filter screen 7 close to the first pipeline 1 is gradually slid to the groove 24, and the sealing baffle 27 slides along the inner wall of the groove 24 until it is completely slid into the sealing hole 26, at this time, the first pipeline 1 is communicated with the sealing hole 26 through the groove 24, when the filter screen 7 is rotated to the end of the groove 24 away from the first opening, the fine sand on the surface of the filter screen 7 can be scraped off through the groove 24, and the fine sand falling off is collected in the groove 24, when the filter screen 7 completely passes through the groove 24, the two filter screens 7 are blocked by the inner wall of the sand prevention cylinder 3, at this time, the fluid in the first pipeline 1 flows into the groove 24, and then flows to the bottom of the sand prevention cylinder 3 from the sand discharging hole 25, so that the fine sand in the groove 24 is washed to the bottom of the sand prevention cylinder 3 from the sand discharging hole 25 in the fluid flow process, thereby realizing automatic cleaning of the surface of the filter screen 7 and prolonging the service life of the filter screen 7.

[0044] Embodiment 4

[0045] On the basis of Embodiment 3, as shown in Figure 1 a sand discharging port 29 is arranged at the bottom of the sand prevention cylinder 3.

[0046] A fixing ring 30 is arranged below the lower sealing plate 5, a sand guiding hole is arranged in the fixing ring 30, and the sand guiding hole is in the shape of a funnel.

[0047] The working principle and beneficial effects of the above technical solution are that the fine sand particles washed by the fluid can flow out of the sand prevention cylinder 3 through the sand discharge port 29 to the outside of the sand prevention cylinder 3, preventing the sand particles from accumulating at the bottom of the sand prevention cylinder 3.

[0048] Embodiment 5:

[0049] On the basis of embodiment 4, as shown in Figure 6 、 Figure 7 The lower end of the sand prevention cylinder 3 is provided with a sand discharge pipe 31, the upper end of the sand discharge pipe 31 is in communication with the sand discharge port 29, the lower end of the sand discharge pipe 31 is provided with a bottom plate 32, the bottom plate 32 is detachably connected with the lower end of the sand discharge pipe 31, a sealing cylinder 33 is slidably arranged in the sand discharge pipe 31, the sealing cylinder 33 is slidably connected with the inner wall of the sand discharge pipe 31, a sand prevention net 34 is arranged at the upper end of the sealing cylinder 33, a moving shaft 35 is rotatably arranged at the center of the sand prevention net 34, the upper end of the moving shaft 35 extends above the sand prevention net 34 and is provided with a scraper 36, the scraper 36 is in contact with the upper surface of the sand prevention net 34, the lower end of the moving shaft 35 extends into a driving hole, the driving hole is arranged in a driving shaft 39, the lower end of the driving shaft 39 extends to the outside of the bottom plate 32 and is connected with the output end of a driving motor 37, the driving motor 37 is arranged on the lower surface of the bottom plate 32, a plurality of spline bodies are arranged on the outer wall of the lower end of the moving shaft 35, a spline groove corresponding to the spline bodies is arranged in the driving hole, the spline bodies are slidably connected with the spline groove, a moving sleeve 38 is arranged outside the driving shaft 39, the upper end of the moving sleeve 38 is connected with the lower surface of the sand prevention net 34, an internal thread is arranged on the inner wall of the moving sleeve 38, an external thread is arranged on the outer wall of the driving shaft 39, the moving sleeve 38 is threadedly connected with the driving shaft 39, a long strip sliding hole 40 is arranged on the side of the sand discharge pipe 31 close to the second pipeline 2, the length of the long strip sliding hole 40 is less than the height of the sealing cylinder 33, a connecting hole 41 is arranged on the side of the sealing cylinder 33 close to the long strip sliding hole 40, a driving rod 42 is slidably arranged in the long strip sliding hole 40, one end of the driving rod 42 is connected with the connecting hole 41, the other end of the driving rod 42 extends to the outside of the sand discharge pipe 31.

[0050] The working principle and beneficial effects of the above technical solution are as follows: the fine sand particles washed down by the fluid can flow into the sand discharge pipe 31 through the sand discharge port 29 of the sand prevention cylinder 3, and the fine sand particles can be intercepted by the sand prevention net 34. After the fluid flows through the sand prevention net 34, it flows onto the bottom plate 32. After the servo motor 8 stops, the driving motor 37 is automatically started. The driving motor 37 is a forward and reverse motor. The driving motor 37 first rotates forward for a second preset time, and then reverses for a third preset time and stops. When the driving motor 37 rotates forward, the driving shaft 39 rotates, the driving shaft 39 drives the moving sleeve 38 to move upward through cooperation, the moving sleeve 38 drives the sand prevention net 34 to move upward, and the sand prevention net 34 drives the sealing cylinder 33 to slide upward along the long sliding hole 40. After rotating forward for a second preset time, the driving motor 37 reverses, the driving shaft 39 drives the moving sleeve 38 to move downward, the moving sleeve 38 drives the sand prevention net 34 to move downward, and the sand prevention net 34 drives the driving rod 42 to slide downward in the long sliding hole 40 through the sealing cylinder 33. The length of the long sliding hole 40 is less than the height of the sealing cylinder 33, and it is ensured that the fluid and fine sand particles cannot flow out of the long sliding hole 40 during the sliding process of the sealing cylinder 33. During the movement of the sand prevention net 34, the driving shaft 39 drives the moving shaft 35 to rotate in the sand prevention net 34 through the cooperation of the spline groove and the spline body, and the moving shaft 35 drives the scraper 36 to rotate, thereby scraping the fine sand particles in the center of the sand prevention net 34, ensuring that the fluid can flow smoothly to the lower side of the sand prevention net 34, and completing the separation of the fluid and the fine sand particles.

[0051] Example 6:

[0052] Based on example 5, as shown in Figure 6 The recovery cylinder 43 is arranged outside the sand prevention cylinder 3, the piston block 44 is slidably arranged in the recovery cylinder 43, the recovery cavity 45 is arranged below the piston block 44, the piston rod 46 is arranged at the lower end of the piston block 44, the lower end of the piston rod 46 extends to the outside of the recovery cylinder 43 and is connected to the end of the driving rod 42 away from the sand discharge pipe 31, the first pipe body 47 and the second pipe body 48 are arranged at the bottom of the recovery cylinder 43, one end of the first pipe body 47 is connected to the lower end of the sidewall of the sand discharge pipe 31, the other end of the first pipe body 47 is in communication with the recovery cavity 45, the first one-way valve is arranged in the first pipe body 47, one end of the second pipe body 48 is in communication with the recovery cavity 45, the other end of the second pipe body 48 is in communication with the second pipeline 2, and the second one-way valve is arranged in the second pipe body 48.

[0053] The working principle and beneficial effects of the technical scheme are as follows: when the driving rod 42 moves upward, the piston rod 46 is driven to move upward, the piston block 44 is driven to slide upward in the recovery cylinder 43, and the fluid collected on the bottom plate 32 flows into the recovery cavity 45 through the first pipe body 47; when the driving rod 42 moves downward, the driving rod 42 drives the piston block 44 to slide downward through the piston rod 46, and the fluid in the recovery cavity 45 is extruded into the second pipe 2, so that the fluid recovery is completed, and the waste of fluid is reduced; the bottom plate 32 is detachably connected with the lower end of the sand discharge pipe 31, the driving rod 42 is separated from the piston rod 46, then the driving rod 42 is taken out from the connecting hole 41, and then the bottom plate 32 is disassembled, the sand prevention net 34 and the sealing cylinder 33 are taken out as a whole, so that the sand prevention net 34 is cleaned; during the cleaning process, the fluid in the first pipe 1 cannot flow out, the waste of fluid is avoided, and the energy-saving effect is achieved.

[0054] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0055] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, they can be fixed connection, or detachable connection, or integrated; they can be mechanical connection, or electrical connection or communication with each other; they can be directly connected, or indirectly connected through an intermediate medium; they can be the communication or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] Although the embodiments of the present application have been disclosed as above, they are not limited to the application and implementation listed in the specification and embodiments, and can be fully applied to various fields suitable for the present application, and additional modifications can be easily realized by those skilled in the art, therefore the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A sand-preventive, throttling, well-kill manifold, characterized in that, The utility model relates to a sand prevention device for oil and gas well, including: First pipeline (1) with second pipeline (2), be provided with throttle valve on second pipeline (2), be provided with sand prevention cylinder (3) between first pipeline (1) with second pipeline (2), one side of sand prevention cylinder (3) is provided with first opening, the other side is provided with second opening, be provided with upper sealing plate (4) with lower sealing plate (5) in sand prevention cylinder (3), form the communicating chamber between upper sealing plate (4) with lower sealing plate (5), the communicating chamber is communicated with first pipeline (1) through first opening, the communicating chamber is communicated with second pipeline (2) through second opening, rotating shell (6) is rotatably arranged in the communicating chamber, the both sides symmetry of rotating shell (6) is provided with mounting hole, is provided with filter screen (7) in mounting hole, be provided with drive mechanism in sand prevention cylinder (3), drive mechanism is used to drive rotating shell (6) rotates in the communicating chamber; Drive mechanism includes servo motor (8), servo motor (8) is arranged in the lower surface of cover plate (9), cover plate (9) is detachably connected with the upper end of sand prevention cylinder (3), the output end of servo motor (8) is provided with driving gear (10), the upper end of rotating shaft (11) is provided with rotating shell (6), rotating shaft (11) upper end passes through upper sealing plate (4) and is rotatably connected with cover plate (9), rotating shaft (11) is provided with driven gear (12) on it; Driving gear (10) is incomplete gear; The output end of servo motor (8) is provided with reciprocating screw (13), reciprocating screw (13) lower end is rotatably connected with fixed plate (14), fixed plate (14) is connected with the inner wall of sand prevention cylinder (3), reciprocating screw (13) is slidably provided with moving seat (15), the both sides of moving seat (15) are slidably connected with the upper and lower inner walls of sand prevention cylinder (3), the bottom of moving seat (15) is provided with a plurality of spring rods (16), and the lower part of spring rod (16) is provided with a limiting assembly; The limiting assembly includes a positioning hole (17) arranged in the upper sealing plate (4), a plurality of sliding holes (18) are arranged on the inner wall of the positioning hole (17), a guide block (19) is slidably arranged in the sliding hole (18), the guide block (19) is connected with the inner wall of the sliding hole (18) through a return spring (20), a limiting plate (21) is slidably arranged in the positioning hole (17), the outer wall of the limiting plate (21) is connected with the guide block (19), a clamping column (22) is arranged on the lower surface of the limiting plate (21), the lower end of the clamping column (22) extends into a limiting hole (23), and the limiting hole (23) is arranged on the upper surface of the rotating shell (6).

2. A sand-tolerant kill manifold as defined in claim 1, characterized in that The lower end of the clamping column (22) is provided with a rolling element.

3. A sand-tolerant kill manifold as defined in claim 1, wherein, The inner wall of the front side of the sand prevention cylinder (3) is provided with a groove (24), one end of the groove (24) is communicated with the first opening, the lower sealing plate (5) is provided with a sand discharge hole (25), the upper end of the sand discharge hole (25) is communicated with the end of the groove (24) away from the first opening, the outer wall of the side of the rotating shell (6) close to the first opening is provided with a sealing hole (26), a sealing baffle (27) is slidably arranged in the sealing hole (26), and the sealing baffle (27) is connected with the inner wall of the sealing hole (26) through a compression spring (28).

4. A sand-tolerant kill manifold as defined in claim 3, wherein, The depth of the groove (24) gradually decreases from the end close to the first opening to the end away from the first opening.

5. A sand-tolerant kill manifold as defined in claim 3, wherein, The bottom of the sand prevention cylinder (3) is provided with a sand discharge port (29).

6. A sand-tolerant kill manifold as defined in claim 5, wherein, A fixed ring (30) is arranged below the lower sealing plate (5), a sand guiding hole is arranged in the fixed ring (30), and the sand guiding hole is in a funnel shape.

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