A throttling and killing manifold sand prevention device

Abstract

The present invention relates to the technical field of oil and gas production equipment, and discloses a throttling and well-killing manifold sand control device, comprising a sand control cylinder, on which a guide pipe 1 and a guide pipe 2 are provided, which are connected to other components of the well-killing manifold, a sand discharge pipe is provided on the sand control cylinder, a separation cylinder is rotatably installed in the sand control cylinder, a filter hole is provided on the separation cylinder for filtering and separating impurities in the fluid, and the guide pipe 2 is in a connected state with the separation cylinder. The present invention filters sand and gravel in the fluid through the separation cylinder and the filter holes thereon, thereby ensuring the sand control function of the well-killing manifold. In the process of the separation cylinder filtering sand and gravel in the fluid, the impact force after the fluid enters the sand control cylinder will drive the fan plate to rotate, thereby driving the separation cylinder to rotate, so that the separation cylinder has a centrifugal force, and the centrifugal force can reduce the probability of sand and gravel clogging the filter hole, thereby ensuring the normal filtering function of the separation cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas production equipment, in particular to a throttling and well-killing manifold sand prevention device. Background Art

[0002] The well kill manifold is an important component of the oil and gas well pressure control equipment. It is mainly used to control the well pressure and implement well killing operations. Its main functions include: well killing operation, that is, when the well pressure rises abnormally, weighted drilling fluid is injected into the well through the well kill manifold to restore the bottom hole pressure balance and prevent blowout; emergency treatment, that is, when the blowout is out of control or the blowout catches fire, clean water or fire extinguishing agent is injected through the well kill manifold to control the fire or dilute the combustible gas; pressure control, that is, during the drilling process, the wellhead pressure is adjusted in conjunction with the throttle manifold to ensure the safety of drilling operations.

[0003] During the use of the well-killing manifold, the fluid flowing inside it is accompanied by solid particles such as sand, gravel, and rock chips. These impurities will cause wear and blockage inside the manifold, and even cause equipment failure. Therefore, it is necessary to use a sand control device to filter and remove solid particles such as sand, gravel, and rock chips to ensure the normal use of the well-killing manifold. Today, most of the devices used for sand control are composed of components with filtering properties.

[0004] For example, in the prior art, there is a throttling and well-killing manifold sand prevention device (publication number: CN111636856A), which uses a conical sand prevention orifice plate to perform preliminary filtration of sand and gravel, and uses a filter assembly for secondary filtration. The two filtrations achieve the effect of removing sand and gravel, effectively avoiding damage to equipment downstream of the filter assembly due to impurity impact and friction, and protecting the throttling and well-killing manifold from damage. However, in actual use, the conical sand prevention orifice plate is easily clogged with sand and gravel during the preliminary filtration, which hinders the normal flow of the fluid and affects the normal use of the well-killing manifold. Summary of the Invention

[0005] The object of the present invention is to provide a choke and well-kill manifold sand control device to solve the problems raised in the above background technology.

[0006] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention is a sand control device for a throttling and well-killing manifold, comprising a sand control cylinder, on which a guide pipe 1 and a guide pipe 2 are provided, which are connected to other components of the well-killing manifold, a sand discharge pipe is provided on the sand control cylinder, a separation cylinder is rotatably installed in the sand control cylinder, the separation cylinder is provided with filter holes for filtering and separating impurities in the fluid, and the guide pipe 2 is in a connected state with the separation cylinder; a fan plate is provided on the separation cylinder, the number of the fan plates is set to be multiple, and they are distributed in a ring shape on the separation cylinder, the connection between the guide pipe 1 and the sand control cylinder is inclined, and the inclination angle is between forty-five and sixty degrees, which is used to increase the impact force of the fluid on the fan plate and facilitate the rotation of the fan plate.

[0008] Furthermore, a mounting bracket is provided on the sand control tube, and the sand control tube is tilted, and the tilt angle is between forty-five degrees and sixty degrees.

[0009] Furthermore, the separation cylinder is divided into two upper and lower chambers, which are connected by a gourd groove, and the inner diameters of the upper and lower chambers are both larger than the inner diameter of the gourd groove. The filter hole is connected to the lower chamber, and an overflow port is opened on the separation cylinder. A filter net is arranged in the overflow port. The overflow port is used to increase the fluid capacity in the sand prevention cylinder when the filter hole is blocked, and the overflow port assists fluid filtration, thereby reducing the increase in fluid pressure in the separation cylinder caused by the blockage of the filter hole.

[0010] Furthermore, a hook strip is installed on the fan plate, and a rubber pad is provided on one side of the fan plate where the hook strip is provided. The hook strip is used to increase the impact force of the fluid on the fan plate, thereby improving the rotation efficiency of the fan plate. The provision of the rubber pad can reduce the damage to the fan plate caused by the impact of impurities in the fluid, thereby ensuring the service life of the fan plate.

[0011] Furthermore, a frame cover is provided on the sand control cylinder, and a sealing disk is installed on the frame cover. The sealing disk is used to seal one end of the separation cylinder, an air guide tube is installed on the sealing disk, and a branch pipe is installed on the air guide tube. A sliding sleeve is provided on the air guide tube with a resist disk, and the outer ring of the resist disk contacts the inner wall of the separation cylinder, and a corrugated airbag is installed on the resist disk, and the other side of the corrugated airbag is connected to the sealing disk. A return spring is provided on the air guide tube, one end of the return spring is connected to the resist disk, and the other end of the return spring is connected to the sealing disk. A three-way air supply pipe is provided in the frame cover, one end of the three-way air supply pipe is connected to the corrugated airbag, one end of the three-way air supply pipe is connected to the air guide tube, and one end of the three-way air supply pipe is connected to the inner cavity of the frame cover, and a ventilation port is provided on the frame cover, and a filter screen 2 is provided in the ventilation port.

[0012] Furthermore, two one-way valves are provided on the three-way gas pipe, one of which is located at the port of the three-way gas pipe connected to the inner cavity of the frame cover, so that the airflow in the inner cavity of the frame cover can only flow into the three-way gas pipe, and the other one-way valve is located at the port of the three-way gas pipe connected to the air guide pipe, so that the airflow entering the three-way gas pipe can only flow into the air guide pipe.

[0013] Furthermore, a positioning ring is provided in the branch pipe, and a piston plate is provided on the positioning ring. The piston plate is used to seal the inner ring of the positioning ring, thereby forming a seal in the branch pipe. A reset assembly is provided in the branch pipe, which is used to tightly connect the piston plate and the positioning ring when the piston plate is not subjected to external force.

[0014] Furthermore, a water guide port is opened on the branch pipe, and the water guide port is set at an angle. During the rotation of the separation cylinder, it will drive the fluid in the sand control cylinder to rotate, forming a vortex. Part of the fluid enters the branch pipe through the water guide port, and the fluid has an impact force in this process. Under the action of this impact force, the fluid is ejected through the port of the branch pipe and acts on the filter hole on the separation cylinder, completing the cleaning operation of the filter hole.

[0015] Furthermore, the inner ring of the sand control cylinder is provided with a corrugated buffer sleeve. The outer ring of the corrugated buffer sleeve is cylindrical and connected to the inner wall of the sand control cylinder. The inner ring is corrugated and has multiple through grooves. In the process of the fluid rotating with the separation cylinder, centrifugal force will be generated. Under the action of centrifugal force, impurities in the fluid will move outward and then collide with the corrugated buffer sleeve. The corrugated buffer sleeve will buffer the collision force, reduce damage to the sand control cylinder, and reduce the noise generated by the collision.

[0016] Furthermore, when the fluid enters the sand control cylinder through the guide tube, the impact force generated acts on the fan plate, and the fan plate rotates accordingly to buffer the impact force, reduce the damage to the separation cylinder caused by the fluid impact force, and ensure the service life of the separation cylinder.

[0017] The present invention has the following beneficial effects:

[0018] (1) The present invention sets an independent sand control component on the well-killing manifold, which is used to filter sand and gravel from the fluid flowing in the well-killing manifold. Specifically, the sand and gravel in the fluid are filtered through the separation cylinder and the filter holes thereon, thereby ensuring the sand control function of the well-killing manifold. In the process of the separation cylinder filtering sand and gravel in the fluid, the impact force after the fluid enters the sand control cylinder will drive the fan plate to rotate, thereby driving the separation cylinder to rotate, so that the separation cylinder has a centrifugal force. The centrifugal force can reduce the probability of sand and gravel clogging the filter holes, thereby ensuring the normal filtering function of the separation cylinder.

[0019] (2) The present invention is provided with hook strips and rubber pads on the fan plate. The setting of the hook strips can provide resistance to the fluid in the process of the fluid contacting the fan plate. Under the action of the resistance, the fan plate can receive the impact force of the fluid more comprehensively, so that the fan plate is in a strong rotation state. The rubber pad can form a buffer in the process of the fluid contacting the fan plate, reducing the damage caused by the collision of sand and gravel in the fluid to the fan plate, ensuring the service life of the fan plate, and when the fan plate is in a strong rotation state, the centrifugal force applied to the separation cylinder is simultaneously enhanced, thereby increasing the anti-clogging effect of the filter hole.

[0020] (3) In the present invention, when the filter hole is clogged, the flow rate of the fluid passing through the filter hole is reduced, and the flow rate in the sand control tube is increased. As the fluid capacity increases, the impact plate is pushed up, and then the gas in the corrugated airbag enters the air guide pipe through the three-way air pipe and is then discharged through the branch pipe. The impact of the gas impacts the impurities in the filter hole, thereby reducing the probability of the filter hole being clogged.

[0021] (4) The present invention provides a water guide port on the branch pipe. As the fluid rotates with the separation cylinder, part of the fluid enters the branch pipe through the water guide port and still has an impact force. The impact force is concentrated under the action of the branch pipe, thereby increasing the impact effect of the fluid on the filter hole and completing the impact cleaning of the filter hole. In addition, a stronger impact is formed under the cooperation of the air flow in the air guide pipe, thereby improving the cleaning effect of the filter hole.

[0022] (5) In the present invention, a corrugated buffer sleeve is provided on the inner wall of the sand control cylinder. When the fluid rotates with the separation cylinder, part of the sand and gravel moving outward will contact the corrugated buffer sleeve. The corrugated buffer sleeve can buffer the impact of the sand and gravel, reduce the wear of the sand and gravel on the inner wall of the sand control cylinder, reduce the noise generated by the collision, and also avoid the reverse impact generated by the sand and gravel when contacting the inner wall of the sand control cylinder, and prevent the sand and gravel from entering the filter hole due to the reverse impact force, causing the filter hole to be blocked, further preventing the filter hole from being blocked, and also increasing the comprehensiveness of the filter hole anti-blocking.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 Schematic diagram of the cross-sectional structure of the sand control tube in the present invention;

[0027] Figure 3 Schematic diagram of the connection structure between the sand control cylinder and the flow guide pipe 1 in the present invention;

[0028] Figure 4 Schematic diagram of the connection structure between the separation cylinder and the fan plate in the present invention;

[0029] Figure 5 This is a schematic structural diagram of the frame cover, sealing disk, corrugated airbag and air guide tube of the present invention;

[0030] Figure 6 Schematic diagram of the connection structure of the corrugated airbag, the air guide tube and the three-way air transmission pipe in the present invention;

[0031] Figure 7 Schematic diagram of the cross-sectional structure of the branch pipe in the present invention;

[0032] Figure 8 It is a structural schematic diagram of the corrugated buffer sleeve in the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0034] In the figure: 1. Sand control cylinder; 2. Mounting bracket; 3. Diversion pipe 1; 4. Diversion pipe 2; 5. Sand discharge pipe; 6. Separation cylinder; 7. Fan plate; 8. Hook bar; 9. Stop plate; 10. Corrugated airbag; 11. Return spring; 12. Air guide pipe; 13. Three-way air supply pipe; 14. Frame cover; 15. Branch pipe; 16. Water guide port; 17. Positioning ring; 18. Piston plate; 19. Shielding plate; 20. Return assembly; 21. Corrugated buffer sleeve; 22. Sealing plate. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figures 1-8As shown, the present invention is a throttling and killing sand control device for a manifold, comprising a sand control cylinder 1, on which a flow guide pipe 1 3 and a flow guide pipe 2 4 are provided, which are connected to other components of the killing well manifold, a sand discharge pipe 5 is provided on the sand control cylinder 1, and a valve is provided on the sand discharge pipe 5 for controlling the discharge of sand and gravel, a separation cylinder 6 is rotatably installed in the sand control cylinder 1, and a filter hole is provided on the separation cylinder 6 for filtering and separating impurities in the fluid, and the flow guide pipe 2 4 and the separation cylinder 6 are in a Connected state; The separation cylinder 6 is provided with a fan plate 7, the number of fan plates 7 is set to be multiple, and is distributed in an annular shape on the separation cylinder 6. The connection between the guide tube 3 and the sand control cylinder 1 is inclined, and the inclination angle is between forty-five and sixty degrees, which is used to increase the impact force of the fluid on the fan plate 7 and facilitate the rotation of the fan plate 7. The sand control cylinder 1 is provided with a mounting bracket 2, which is inclined, and the inclination angle is between forty-five and sixty degrees. The separation cylinder 6 is divided into two upper and lower chambers, and the upper and lower chambers The two chambers are connected by a gourd groove, and the inner diameters of the upper and lower chambers are larger than the inner diameter of the gourd groove. The filter hole is connected to the lower chamber. An overflow port is provided on the separation cylinder 6, and a filter screen is provided in the overflow port. The overflow port is used to increase the fluid capacity in the sand control cylinder 1 when the filter hole is blocked, and assist the fluid filtering through the overflow port to reduce the increase in fluid pressure in the separation cylinder 6 caused by the blockage of the filter hole. In actual use, a pressure sensor needs to be provided on the sand control cylinder 1 to detect the fluid pressure in the sand control cylinder 1, and generate an alarm when the pressure is too high to remind maintenance personnel to perform maintenance. The purpose of setting the overflow port is to provide time for maintenance personnel to rush for maintenance. A hook strip 8 is installed on the fan plate 7, and a rubber pad is provided on one side of the fan plate 7 with the hook strip 8. The hook strip 8 is used to increase the impact force of the fluid on the fan plate 7, thereby improving the rotation efficiency of the fan plate 7. The setting of the rubber pad can reduce the damage caused by the impact of impurities in the fluid on the fan plate 7, thereby ensuring the service life of the fan plate 7.

[0037] A frame cover 14 is provided on the sand control tube 1, and the frame cover 14 and the sand control tube 1 are connected by a threaded sealing connection. A sealing disk 22 is installed on the frame cover 14, and the sealing disk 22 is used to seal one end of the separation tube 6. An air guide tube 12 is installed on the sealing disk 22, and a branch pipe 15 is installed on the air guide tube 12. A sliding sleeve is provided on the air guide tube 12 with a disc 9, and the outer ring of the disc 9 contacts the inner wall of the separation tube 6. A corrugated airbag 10 is installed on the disc 9, and the other side of the corrugated airbag 10 is connected to the sealing disk 22. A reset spring 11 is provided on the air guide tube 12, and one end of the reset spring 11 is connected to the disc 9, and the other end of the reset spring 11 is connected to the sealing disk 22. Three The three-way air supply pipe 13 is connected to the corrugated airbag 10, one end of the three-way air supply pipe 13 is connected to the air guide pipe 12, and one end of the three-way air supply pipe 13 is connected to the inner cavity of the frame cover 14. A ventilation port is provided on the frame cover 14, and a filter screen 2 is provided in the ventilation port. Two one-way valves are provided on the three-way air supply pipe 13, one of which is located at the port of the three-way air supply pipe 13 connected to the inner cavity of the frame cover 14, so that the air flow in the inner cavity of the frame cover 14 can only flow into the three-way air supply pipe 13, and the other one-way valve is located at the port of the three-way air supply pipe 13 connected to the air guide pipe 12, so that the air flow entering the three-way air supply pipe 13 can only flow into the air guide pipe 12.

[0038] A positioning ring 17 is provided in the branch pipe 15, and a piston piece 18 is provided on the positioning ring 17. The piston piece 18 is used to seal the inner ring of the positioning ring 17, and then form a seal in the branch pipe 15. A reset assembly 20 is provided in the branch pipe 15. The reset assembly 20 is specifically composed of a fixed cylinder, a telescopic rod and a telescopic spring. The fixed cylinder is installed in the branch pipe 15, and the telescopic rod is slidably installed in the fixed cylinder, and the top of the telescopic rod extends to the outside of the fixed cylinder and is connected to the piston piece 18. The bottom end of the telescopic rod is provided with a bottom plate, and the telescopic spring is sleeved on the telescopic rod. One end of the telescopic spring is connected to the bottom plate, and the other end of the telescopic spring is connected to the fixed cylinder, which is used to tightly connect the piston piece 18 with the positioning ring 17 when the piston piece 18 is not subjected to external force. A water guide port 16 is provided, and the water guide port 16 is arranged at an angle. During the rotation of the separation cylinder 6, the fluid in the sand control cylinder 1 will be driven to rotate, forming a vortex. Part of the fluid enters the branch pipe 15 through the water guide port 16, and the fluid has an impact force in the process. Under the action of the impact force, the fluid is ejected through the port of the branch pipe 15 and acts on the filter hole on the separation cylinder 6, completing the cleaning operation of the filter hole. A baffle plate 19 is installed at the bottom of the piston plate 18, and the baffle plate 19 extends to the bottom of the positioning ring 17 and is slidably connected to the positioning ring 17. The baffle plate 19 is used to block the side facing the water guide port 16 when the gas is discharged through the positioning ring 17, to ensure that the gas will not affect the fluid entering the water guide port 16 when it flows.

[0039] The inner ring of the sand control cylinder 1 is provided with a corrugated buffer sleeve 21. The inner and outer walls of the corrugated buffer sleeve 21 are both provided with rubber sleeves to ensure buffering when it comes into contact with sand and gravel. The outer ring of the corrugated buffer sleeve 21 is cylindrical and connected to the inner wall of the sand control cylinder 1. The inner ring is corrugated and has multiple through grooves. In the process of the fluid rotating with the separation cylinder 6, centrifugal force will be generated. Under the action of centrifugal force, impurities in the fluid will move outward and then collide with the corrugated buffer sleeve 21. The corrugated buffer sleeve 21 buffers the collision force, reducing damage to the sand control cylinder 1 and reducing the noise generated by the collision. The impact force generated after the fluid enters the sand control cylinder 1 through the guide tube 3 acts on the fan plate 7, and the fan plate 7 rotates accordingly to buffer the impact force, reduce the damage to the separation cylinder 6 caused by the fluid impact force, and ensure the service life of the separation cylinder 6.

[0040] When in use, the sand control cylinder 1 is installed into the well killing manifold assembly through the guide pipe 1 3 and the guide pipe 2 4, so as to facilitate the sand and gravel filtering of the fluid flowing in the well killing manifold. Specifically, the fluid enters the sand control cylinder 1 through the guide pipe 1 3, and the sand and gravel in the fluid can be filtered through the separation cylinder 6 and the filter holes thereon. The filtered fluid is discharged through the guide pipe 2 4, thereby completing the sand and gravel filtering operation of the fluid;

[0041] When the fluid enters the sand control cylinder 1, it will form an impact. The impact force of the fluid acts on the fan plate 7, pushing the fan plate 7 to rotate, thereby driving the separation cylinder 6 to rotate. During the rotation of the separation cylinder 6, centrifugal force is generated. Under the action of centrifugal force, the probability of sand and gravel clogging the filter holes can be reduced, ensuring the normal filtration of the separation cylinder 6.

[0042] When the filter holes are clogged, the fluid capacity in the sand control cylinder 1 increases, which in turn causes the pressure in the sand control cylinder 1 to increase. In this case, the fluid will push the impact plate 9 upward, causing the corrugated airbag 10 to contract. The air flow in the corrugated airbag 10 enters the air guide pipe 12 through the three-way air supply pipe 13 and is then discharged through the branch pipe 15. This can provide pressurization for the fluid entering the branch pipe 15 through the water guide port 16, so that the fluid can better impact the filter holes on the separation cylinder 6, further reducing the blockage of the filter holes. At the same time, during the rotation of the separation cylinder 6, the surrounding fluid will be driven to rotate. The centrifugal force will throw impurities in the fluid toward the outer wall away from the separation cylinder 6. The corrugated buffer sleeve 21 can cushion the sand and gravel, reducing the wear on the inner wall of the sand control cylinder 1 and the generation of collision noise. At the same time, it also prevents the rebound force generated by the collision between the sand and gravel and the inner wall of the sand control cylinder 1 from causing the sand and gravel to rebound and impact the filter holes and cause blockage of the filter holes, further ensuring the normal filtration of sand and gravel by the separation cylinder 6.

[0043] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A throttling well-killing manifold sand control device, comprising a sand control cylinder (1), a flow guide pipe 1 (3) and a flow guide pipe 2 (4) provided on the sand control cylinder (1), the flow guide pipe 1 (3) and the flow guide pipe 2 (4) being connected to other components of the well-killing manifold, and a sand discharge pipe (5) provided on the sand control cylinder (1), characterized in that: A separation cylinder (6) is rotatably mounted in the sand control cylinder (1). The separation cylinder (6) is provided with a filter hole for filtering and separating impurities in the fluid. The second guide pipe (4) is in a connected state with the separation cylinder (6). The separation cylinder (6) is provided with a fan plate (7), the number of the fan plates (7) is set to be multiple and distributed in an annular shape on the separation cylinder (6), and the connection between the guide tube (3) and the sand control cylinder (1) is inclined, and the inclination angle is between 45 degrees and 60 degrees, so as to increase the impact force of the fluid on the fan plate (7) and facilitate the rotation of the fan plate (7); The separation cylinder (6) is divided into two upper and lower chambers, which are connected by a gourd groove. The inner diameters of the upper and lower chambers are both larger than the inner diameter of the gourd groove. The filter hole is connected to the lower chamber. An overflow port is provided on the separation cylinder (6). A filter screen is provided in the overflow port. The overflow port is used to increase the fluid capacity in the sand prevention cylinder (1) when the filter hole is blocked. The overflow port assists in fluid filtration, thereby reducing the increase in fluid pressure in the separation cylinder (6) caused by the blockage of the filter hole. A hook strip (8) is installed on the fan plate (7), and a rubber pad is provided on one side of the fan plate (7) where the hook strip (8) is provided. The hook strip (8) is used to increase the impact force of the fluid on the fan plate (7), thereby improving the rotation efficiency of the fan plate (7). The provision of the rubber pad can reduce damage to the fan plate (7) caused by the impact of impurities in the fluid, thereby ensuring the service life of the fan plate (7); The sand prevention cylinder (1) is provided with a frame cover (14), a sealing disc (22) is installed on the frame cover (14), the sealing disc (22) is used to block one end of the separation cylinder (6), an air guide tube (12) is installed on the sealing disc (22), a branch pipe (15) is installed on the air guide tube (12), a sliding sleeve is provided with a disc (9), the outer ring of the disc (9) contacts the inner wall of the separation cylinder (6), a corrugated air bag (10) is installed on the disc (9), the other side of the corrugated air bag (10) is connected to the sealing disc (22), and the air guide tube (12) is provided with a branch pipe (15). A return spring (11) is provided on the upper sleeve of (12), one end of the return spring (11) is connected to the back plate (9), and the other end of the return spring (11) is connected to the sealing plate (22). A three-way air supply pipe (13) is provided in the frame cover (14), one end of the three-way air supply pipe (13) is communicated with the corrugated air bag (10), one end of the three-way air supply pipe (13) is communicated with the air guide pipe (12), and one end of the three-way air supply pipe (13) is communicated with the inner cavity of the frame cover (14). A ventilation port is provided on the frame cover (14), and a filter screen 2 is provided in the ventilation port.

2. The choke and kill manifold sand control device according to claim 1, characterized in that: A mounting bracket (2) is provided on the sand prevention tube (1), and the sand prevention tube (1) is arranged in an inclined manner, and the inclination angle is between 45 degrees and 60 degrees.

3. The choke and kill manifold sand control device according to claim 2, characterized in that: Two one-way valves are provided on the three-way gas pipe (13), one of which is located at the port of the three-way gas pipe (13) communicating with the inner cavity of the frame cover (14), so that the airflow in the inner cavity of the frame cover (14) can only flow into the three-way gas pipe (13), and the other one-way valve is located at the port of the three-way gas pipe (13) communicating with the air guide pipe (12), so that the airflow entering the three-way gas pipe (13) can only flow into the air guide pipe (12).

4. The choke and kill manifold sand control device according to claim 3, characterized in that: A positioning ring (17) is provided in the branch pipe (15), and a piston plate (18) is provided on the positioning ring (17). The piston plate (18) is used to seal the inner ring of the positioning ring (17), thereby forming a seal in the branch pipe (15). A reset assembly (20) is provided in the branch pipe (15) and is used to tightly connect the piston plate (18) and the positioning ring (17) when the piston plate (18) is not subjected to external force.

5. The choke and kill manifold sand control device according to claim 4, characterized in that: A water guide port (16) is provided on the branch pipe (15). The water guide port (16) is arranged at an angle. During the rotation of the separation cylinder (6), the fluid in the sand control cylinder (1) is driven to rotate, forming a vortex. Part of the fluid enters the branch pipe (15) through the water guide port (16). In this process, the fluid has an impact force. Under the action of the impact force, the fluid is ejected through the port of the branch pipe (15) and acts on the filter hole on the separation cylinder (6), completing the cleaning operation of the filter hole.

6. The choke and kill manifold sand control device according to claim 5, characterized in that: The inner ring of the sand control cylinder (1) is provided with a corrugated buffer sleeve (21), the outer ring of the corrugated buffer sleeve (21) is cylindrical and connected to the inner wall of the sand control cylinder (1), the inner ring is corrugated, and a plurality of through grooves are opened on the inner ring. When the fluid rotates with the separation cylinder (6), centrifugal force is generated. Under the action of the centrifugal force, impurities in the fluid move outward and then collide with the corrugated buffer sleeve (21). The corrugated buffer sleeve (21) buffers the collision force, thereby reducing damage to the sand control cylinder (1) and reducing noise generated by the collision.

7. The choke and kill manifold sand control device according to claim 6, characterized in that: When the fluid enters the sand control cylinder (1) through the guide tube (3), the impact force generated acts on the fan plate (7), and the fan plate (7) rotates accordingly to buffer the impact force, thereby reducing the damage caused by the fluid impact force to the separation cylinder (6) and ensuring the service life of the separation cylinder (6).

Images