Throttling well killing device with sand prevention structure

Abstract

The throttling well killing device comprises a height adjusting structure, a position adjusting structure is fixed to the upper side of the height adjusting structure, a throttling well killing structure is detachably installed on the position adjusting structure, a recycling structure is embedded in the position adjusting structure, and an energy-saving structure is detachably installed on the upper side of the position adjusting structure. The height adjusting structure comprises a bottom box, a first height adjusting assembly is embedded in the bottom box, a bottom plate is fixed to the upper side of the first height adjusting assembly, the bottom box limits and fixes the bottom plate through a limiting assembly, the first height adjusting assembly comprises a hydraulic cylinder, and the hydraulic cylinder drives a first shock absorber through a hydraulic rod to telescopically adjust the position of the bottom plate. The throttling and well killing device with the sand prevention structure automatically treats sand and stones, automatically adjusts the height, automatically gives an alarm and recycles oil when oil leaks, automatically protects the throttling and well killing device, and has the advantage of saving energy at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of throttling well-killing manifold, in particular to a throttling well-killing device with a sand prevention structure. Background Art

[0002] The throttling and well-killing manifold is a necessary equipment for controlling well kicks and implementing oil and gas well pressure control technology. When the sprinkler is closed, the throttling valve is used to control a certain pressure so that the bottom hole pressure is always kept slightly greater than the formation pressure to prevent the formation fluid from further flowing into the well. In addition, when shutting in the well, the throttling and well-killing manifold can achieve soft well shut-in through the throttling pipe pressure relief. When the pressure in the well rises to a certain limit, it will spray out to protect the wellhead. The existing throttling and well-killing device gushes out sand and gravel during oil production, and the sand and gravel directly enter the equipment, affecting the service life of the entire device. In addition, when oil leaks, the oil is not recovered, resulting in a waste of resources. At the same time, the existing throttling and well-killing device is directly exposed to the outdoors and is easily affected by the external environment, causing unnecessary losses. Summary of the invention

[0003] The purpose of the present invention is to provide a throttling and well-killing device with a sand-proof structure to solve the problem proposed in the above-mentioned background technology that the existing throttling and well-killing device gushes out sand and gravel during oil production, and the sand and gravel directly enter the interior of the equipment, affecting the service life of the entire device, and when oil leaks, the oil is not recovered, resulting in a waste of resources. At the same time, the existing throttling and well-killing device is directly exposed to the outdoors and is easily affected by the external environment, causing unnecessary losses.

[0004] To achieve the above object, the present invention provides the following technical solutions: a throttling and well-killing device with a sand control structure, comprising a height adjustment structure, a position adjustment structure is fixed on the upper side of the height adjustment structure, the throttling and well-killing structure is detachably mounted on the position adjustment structure, a recovery structure is embedded in the position adjustment structure, and an energy-saving structure is detachably mounted on the upper side of the position adjustment structure;

[0005] The height adjustment structure comprises a bottom box, in which a first height adjustment component is embedded, a bottom plate is fixed on the upper side of the first height adjustment component, and the bottom box limits and fixes the bottom plate through a limiting component;

[0006] The first height adjustment assembly includes a hydraulic cylinder, which drives the first shock absorber to extend and retract to adjust the position of the base plate through a hydraulic rod;

[0007] The limit assembly includes a rotating rod, a first connecting rod is fixed on the rotating rod, the first connecting rod is telescopically adjusted to adjust the position of the L-shaped plate through the second shock absorber, the limit block fixed on the L-shaped plate is engaged and embedded in the limit groove opened on the bottom plate, and a pull ring is fixed on the upper side of the L-shaped plate;

[0008] The position adjustment structure comprises a first support plate, on which a second height adjustment assembly is fixed;

[0009] The second height adjustment assembly includes a support column, and a motor in the support column drives the gear to rotate and drive the support rod on the rack to slide upward.

[0010] Preferably, the throttling and well-killing structure comprises a throttling and well-killing body, the throttling and well-killing body is connected to a sand filter pipe, a threaded seal on the sand filter pipe is connected to a first filter screen, and a sand filter assembly is fixed on the first filter screen.

[0011] Preferably, the sand filter assembly includes a first motor box, a motor in the first motor box drives the limit cleaning brush to rotate, the sand guide groove is connected to the sand filter pipe, and a first sealing cover is threadedly sealed at the lower side of the sand guide groove.

[0012] By adopting the above technical solution, the sand removal effect is achieved by setting up the sand filtering component.

[0013] Preferably, the recovery structure includes a material guide trough, the material guide trough is connected to a liquid outlet pipe, the liquid outlet pipe is connected to a drain pipe and a first oil pipeline, the drain pipe is located on the right side of the first oil pipeline, and the first oil pipeline is connected to an oil recovery assembly.

[0014] Preferably, the oil recovery assembly includes a filter box, the filter box is slidably connected to a second filter screen, the filter box is connected to the oil storage tank through a second oil pipeline, and the lower side of the oil storage tank is threadedly sealed and connected to the second sealing cover.

[0015] By adopting the above technical solution, the oil is recovered and reprocessed by setting up an oil recovery component.

[0016] Preferably, the energy-saving structure includes a support base, which is rotatably connected to a top cover, on which a photovoltaic panel is embedded, which is electrically connected to a battery, and a moving component is slidably connected to the support base, a cleaning component and a flushing component are fixed on the upper side of the moving component, and the flushing component is located on the right side of the cleaning component.

[0017] Preferably, the moving assembly includes a second motor box, and the motor in the second motor box drives the screw to rotate to drive the slider to slide on the top cover.

[0018] By adopting the above technical solution, the positions of the flushing component and the cleaning component are adjusted by setting a moving component.

[0019] Preferably, the cleaning assembly comprises a U-shaped plate, and the U-shaped plate is telescopically adjusted to adjust the position of the cleaning brush on the second support plate through an electric telescopic rod.

[0020] By adopting the above technical solution, a cleaning component is provided to assist in cleaning the surface of the photovoltaic panel.

[0021] Preferably, the flushing assembly includes a flushing nozzle, and the flushing nozzle is connected to the water tank through a water pipe.

[0022] By adopting the above technical solution, the photovoltaic panel is flushed by setting a flushing component.

[0023] Compared with the prior art, the beneficial effects of the present invention are: the throttling well-killing device with sand control structure,

[0024] (1) The present invention automatically processes sand and gravel, automatically adjusts the height, automatically gives an alarm and recovers oil when oil leaks, and automatically protects the throttling well-killing device, while achieving the advantage of energy saving. With the assistance of the hydraulic cylinder in the bottom box, the height of the upper throttling well-killing structure is adjusted through the bottom plate. When bad weather occurs, the first connecting rod is rotated to limit the limit block on the L-shaped plate in the limit groove, thereby limiting the position adjustment structure and the throttling well-killing structure on the bottom plate. The first support plate is rotatably connected to the front and rear with sealing mesh doors, and the sealing mesh doors squeeze the first support plate to protect the throttling well-killing structure, thereby avoiding damage to the throttling well-killing structure due to external principles and causing unnecessary losses. The stepping motor in the support column adjusts the position of the top cover on the support rod through the gear and the rack, thereby facilitating the maintenance of the throttling well-killing structure in the later stage.

[0025] (2) The present invention filters impurities with the assistance of the first filter screen, and the sand and gravel are finally deposited in the sand guide groove. With the assistance of the double-headed motor in the first motor box, the limit cleaning brush automatically brushes both sides of the first filter screen, thereby preventing impurities from clogging the holes of the first filter screen and affecting the normal filtering work;

[0026] (3) In the present invention, when oil leakage occurs, the alarm on the first support plate sounds an alarm and transmits the alarm information to the background, so that the staff can handle it in time. The oil enters the filter box through the liquid outlet pipe and the first oil delivery pipe, and is filtered by the second filter screen in the filter box and stored in the oil storage tank, so that it is convenient for unified recycling and reuse in the later stage, avoiding waste of resources;

[0027] (4) The present invention plays an energy-saving role with the assistance of the photovoltaic panel on the top cover, performs auxiliary cleaning with the assistance of the cleaning brush, and performs flushing again with the assistance of the flushing nozzle, thereby ensuring that the photovoltaic panel is better exposed to sunlight and increasing the utilization rate of sunlight. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view structural schematic diagram of the present invention;

[0029] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0030] Figure 3 It is a schematic diagram of the top view structure of the present invention;

[0031] Figure 4 It is a left-side structural schematic diagram of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the sand filter assembly of the present invention;

[0033] Figure 6 This is a schematic diagram of the energy-saving structure of the present invention;

[0034] Figure 7 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0035] Figure 8 It is a schematic diagram of the three-dimensional structure of the cleaning component of the present invention.

[0036] In the figure: 1. height adjustment structure; 11. bottom box; 12. first height adjustment component; 121. hydraulic cylinder; 122. first shock absorber; 13. bottom plate; 14. limit assembly; 141. rotating rod; 142. first connecting rod; 143. second shock absorber; 144. L-shaped plate; 145. limit block; 146. limit groove; 147. pull ring; 2. position adjustment structure; 21. first support plate; 22. second height adjustment component; 221. support column; 222. gear; 223. rack; 224. support rod; 3. throttling well-killing structure; 31. throttling well-killing body; 32. sand filter tube; 33. first filter screen; 34. sand filter assembly; 341. first motor box; 342. limit cleaning brush; 343. Sand guide trough; 344, first sealing cover; 4, recovery structure; 41, material guide trough; 42, liquid outlet pipe; 43, drain pipe; 44, first oil pipeline; 45, oil recovery assembly; 451, filter box; 452, second filter screen; 453, second oil pipeline; 454, oil storage tank; 455, second sealing cover; 5, energy-saving structure; 51, support seat; 52, top cover; 53, photovoltaic panel; 54, battery; 55, moving assembly; 551, second motor box; 552, screw; 553, slider; 56, cleaning assembly; 561, U-shaped plate; 562, electric telescopic rod; 563, second support plate; 564, cleaning brush; 57, flushing assembly; 571, flushing nozzle; 572, water pipe; 573, water tank. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-8The present invention provides a technical solution: a throttling and well-killing device with a sand control structure, such as Figure 1 , Figure 2 , Figure 4 and Figure 7 As shown, the height adjustment structure 1 includes a bottom box 11, in which a first height adjustment component 12 is embedded, the first height adjustment component 12, a bottom plate 13 is fixed on the upper side of the first height adjustment component 12, the bottom box 11 limits and fixes the bottom plate 13 through a limiting component 14, the first height adjustment component 12 includes a hydraulic cylinder 121, the hydraulic cylinder 121 drives a first shock absorber 122 to adjust the position of the bottom plate 13 through a hydraulic rod, the limiting component 14 includes a rotating rod 141, a first connecting rod 142 is fixed on the rotating rod 141, the first connecting rod 142 adjusts the position of an L-shaped plate 144 through a second shock absorber 143, a limiting block 145 fixed on the L-shaped plate 144 is engaged and embedded in a limiting groove 146 provided on the bottom plate 13, and a pull ring 147 is fixed on the upper side of the L-shaped plate 144;

[0039] Among them, a control device for controlling the entire device is fixed on the bottom box 11, and the motor in this application is a stepper motor, which is a prior art;

[0040] Specifically, four groups of the first height adjustment components 12 and the limiting components 14 are provided, and the four groups of the first height adjustment components 12 and the limiting components 14 are symmetrically arranged about the central axis of the bottom box 11;

[0041] In the above scheme, the position of the bottom plate 13 is adjusted by the first shock absorber 122 with the assistance of the hydraulic cylinder 121 in the bottom box 11, so as to adjust the position of the upper throttling and well-pressuring structure 3. If bad weather occurs, the bottom plate 13 fits the bottom box 11, and the staff rotates the first connecting rod 142. The first connecting rod 142 rotates with the assistance of the rotating rod 141, so that the limit block 145 is limited in the limit groove 146 through the pull ring 147 on the L-shaped plate 144, and finally the bottom plate 13 is limited to ensure the stability of the entire device.

[0042] like Figure 2 and Figure 4 As shown, a position adjustment structure 2 is fixed on the upper side of the height adjustment structure 1, and the position adjustment structure 2 includes a first support plate 21, and a second height adjustment component 22 is fixed on the first support plate 21. The second height adjustment component 22 includes a support column 221, and a motor in the support column 221 drives a gear 222 to rotate and drive a support rod 224 on a rack 223 to slide upward;

[0043] Among them, two groups of first support plates 21 are provided, and mesh plates are rotatably connected on the front and rear outer walls of the two groups of first support plates 21, so as to avoid the throttling and well-killing structure 3 being directly exposed to the outdoors, and to avoid damage to the throttling and well-killing structure 3 due to external reasons, causing unnecessary losses. The mesh plates are fixed with the first support plates 21 by bolts, so as to facilitate the later limiting of the throttling and well-killing structure 3;

[0044] Furthermore, four groups of support columns 221 are provided, and the four groups of support columns 221 are symmetrically arranged. The support columns 221 are hollow, and a stepper motor is embedded in the support column 221. The stepper motor drives the gear 222 to rotate, and the rotation of the gear 222 drives the support rod 224 on the rack 223 to move upward, thereby adjusting the height of the upper energy-saving structure 5;

[0045] In the above scheme, on the first support plate 21, the stepper motor in the support column 221 drives the gear 222 to rotate with the assistance of the stepper motor, and the rotation of the gear 222 drives the support rod 224 on the rack 223 to move upward, thereby adjusting the position of the energy-saving structure 5, which is convenient for the later maintenance of the throttling and well-pressuring structure 3.

[0046] like Figure 1 and Figure 5 As shown, the throttling well-killing structure 3 is disassembled and installed on the position adjustment structure 2, and the recovery structure 4 is embedded in the position adjustment structure 2. The throttling well-killing structure 3 includes a throttling well-killing body 31, and the throttling well-killing body 31 is connected to the sand filter pipe 32. The sand filter pipe 32 is threaded and sealed to connect the first filter screen 33. The first filter screen 33 is fixed with a sand filter assembly 34. The sand filter assembly 34 includes a first motor box 341. The motor in the first motor box 341 drives the limit cleaning brush 342 to rotate. The sand guide groove 343 is connected to the sand filter pipe 32. The lower side of the sand guide groove 343 is threaded and sealed. The recovery structure 4 includes a material guide trough 41, the material guide trough 41 is connected to the liquid outlet pipe 42, the liquid outlet pipe 42 is connected to the drain pipe 43 and the first oil delivery pipe 44, the drain pipe 43 is located on the right side of the first oil delivery pipe 44, the first oil delivery pipe 44 is connected to the oil recovery component 45, the oil recovery component 45 includes a filter box 451, the filter box 451 is slidably connected to the second filter screen 452, the filter box 451 is connected to the oil storage tank 454 through the second oil delivery pipe 453, and the lower side of the oil storage tank 454 is threaded and sealed to the second sealing cover 455;

[0047] Further, two groups of throttling and well-killing structures 3 are provided, and the two groups of throttling and well-killing structures 3 are symmetrically arranged. The arrangement of the two groups of throttling and well-killing structures 3 shortens the entire filtering time. Three groups of sand guide grooves 343 are provided to ensure that the mud and sand after filtering by the first filter screen 33 are uniformly stored, which is convenient for later processing and increases practicality.

[0048] Specifically, electric valves are fixed in the first oil pipeline 44 and the drainage pipe 43. When wastewater is transported, the electric valve in the first oil pipeline 44 is closed. When oil needs to be recycled, the electric valve in the drainage pipe 43 is closed and the electric valve in the first oil pipeline 44 is opened. Two groups of second filter screens 452 are provided, and the mesh densities of the two groups of second filter screens 452 are different.

[0049] In the preferred solution of this embodiment, the mud and sand in the fluid are filtered with the assistance of the first filter screen 33 in the sand filter tube 32 in the throttling and well killing body 31, and the filtered mud and sand are stored in the sand guide groove 343. The first sealing cover 344 is rotated, and the first sealing cover 344 is separated from the sand guide groove 343, so that the mud and sand are cleaned, and the limiting cleaning brush 342 is driven to rotate with the assistance of the double-headed motor in the first motor box 341, and the limiting cleaning brush 342 rotates to clean the surface of the first filter screen 33, ensuring cleaning. To achieve a cleaning effect, the guide trough 41 collects the fluid and transports it through the drain pipe 43 on the liquid outlet pipe 42 or the first oil pipeline 44. The waste oil enters the filter box 451 through the first oil pipeline 44, and impurities in the oil are filtered with the assistance of the second filter screen 452. The filtered oil is stored in the oil storage tank 454 through the second oil pipeline 453, and the second sealing cover 455 is rotated to separate the second sealing cover 455 from the oil storage tank 454, so as to facilitate the subsequent recovery of the oil and avoid waste of resources.

[0050] like Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 8 As shown, the energy-saving structure 5 is disassembled and installed on the upper side of the position adjustment structure 2, and the energy-saving structure 5 includes a support seat 51, and the support seat 51 is rotatably connected to a top cover 52, and a photovoltaic panel 53 is inlaid on the top cover 52, and the photovoltaic panel 53 is electrically connected to a battery 54. A moving component 55 is slidably connected to the support seat 51, and a cleaning component 56 and a flushing component 57 are fixed on the upper side of the moving component 55. The flushing component 57 is located on the right side of the cleaning component 56. The moving component 55 includes a second motor box 551, and the motor in the second motor box 551 drives the screw rod 552 to rotate and drive the slider 553 to slide on the top cover 52. The cleaning component 56 includes a U-shaped plate 561, and the U-shaped plate 561 is telescopically adjusted by the electric telescopic rod 562 to adjust the position of the cleaning brush 564 on the second support plate 563. The flushing component 57 includes a flushing nozzle 571, and the flushing nozzle 571 is connected to the water tank 573 through a water pipe 572;

[0051] Among them, a limit rod is fixed on the lower side of the top cover 52, and the limit rod is limited in the limit groove opened on the support column 221. A lighting lamp is fixed on the lower side of the top cover 52 to play the role of auxiliary lighting;

[0052] Furthermore, two groups of electric telescopic rods 562 are provided, and the two groups of electric telescopic rods 562 are symmetrically arranged about the central axis of the U-shaped plate 561. Multiple groups of flushing nozzles 571 are evenly distributed on the right side of the U-shaped plate 561, and the multiple groups of flushing nozzles 571 are evenly distributed on the U-shaped plate 561.

[0053] In the preferred scheme of this embodiment, the screw 552 is driven to rotate with the assistance of the stepper motor in the second motor box 551, and the rotation of the screw 552 drives the cleaning component 56 on the slider 553 to adjust the position, and the cleaning brush 564 on the second support plate 563 is driven to clean the photovoltaic panel 53 on the top cover 52 with the assistance of the electric telescopic rod 562 on the U-shaped plate 561, and the clean water in the water tank 573 is pressurized and enters the flushing nozzle 571 through the water pipe 572, and the photovoltaic panel 53 is flushed with the assistance of the flushing nozzle 571 to ensure the cleaning quality, and the top cover 52 is rotated, and the top cover 52 and the support seat 51 are rotated, so as to facilitate the maintenance of the throttling well-pressing structure 3.

[0054] Working principle: When using the throttling and well-killing device with a sand control structure, turn on the external power supply, perform height adjustment with the assistance of the height adjustment structure 1, adjust the position of the energy-saving structure 5 with the assistance of the position adjustment structure 2, remove sand with the assistance of the throttling and well-killing structure 3, perform recovery with the assistance of the recovery structure 4, and save energy with the assistance of the energy-saving structure 5. Contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0055] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the protection content of the present invention.

[0056] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A throttling and well-killing device with a sand control structure, characterized in that: The device comprises a height adjustment structure (1), a position adjustment structure (2) is fixed on the upper side of the height adjustment structure (1), a throttling and well-killing structure (3) is detachably mounted on the position adjustment structure (2), a recovery structure (4) is embedded in the position adjustment structure (2), and an energy-saving structure (5) is detachably mounted on the upper side of the position adjustment structure (2); The height adjustment structure (1) comprises a bottom box (11), a first height adjustment component (12) is embedded in the bottom box (11), a bottom plate (13) is fixed on the upper side of the first height adjustment component (12), and the bottom box (11) limits and fixes the bottom plate (13) via a limiting component (14); The first height adjustment assembly (12) comprises a hydraulic cylinder (121), and the hydraulic cylinder (121) drives the first shock absorber (122) to telescope and adjust the position of the bottom plate (13) through a hydraulic rod; The limiting assembly (14) comprises a rotating rod (141), a first connecting rod (142) is fixed on the rotating rod (141), the first connecting rod (142) is telescopically adjusted to adjust the position of the L-shaped plate (144) through a second shock absorber (143), a limiting block (145) fixed on the L-shaped plate (144) is engaged and embedded in a limiting groove (146) provided on the bottom plate (13), and a pull ring (147) is fixed on the upper side of the L-shaped plate (144); The position adjustment structure (2) comprises a first support plate (21), and a second height adjustment component (22) is fixed on the first support plate (21); The second height adjustment assembly (22) comprises a support column (221), wherein a motor in the support column (221) drives a gear (222) to rotate and drives a support rod (224) on a rack (223) to slide upward.

2. The throttling and well-killing device with a sand control structure according to claim 1, characterized in that: The throttling well-killing structure (3) comprises a throttling well-killing body (31), the throttling well-killing body (31) is connected to a sand filter pipe (32), a threaded seal on the sand filter pipe (32) is connected to a first filter screen (33), and a sand filter assembly (34) is fixed on the first filter screen (33).

3. The throttling and well-killing device with a sand control structure according to claim 2, characterized in that: The sand filter assembly (34) comprises a first motor box (341), wherein a motor in the first motor box (341) drives a limit cleaning brush (342) to rotate, a sand guide groove (343) is connected to the sand filter pipe (32), and a first sealing cover (344) is threadedly sealed at the lower side of the sand guide groove (343).

4. The throttling and well-killing device with a sand control structure according to claim 1, characterized in that: The recovery structure (4) comprises a material guide trough (41), the material guide trough (41) is connected to a liquid outlet pipe (42), the liquid outlet pipe (42) is connected to a drainage pipe (43) and a first oil delivery pipe (44), the drainage pipe (43) is located on the right side of the first oil delivery pipe (44), and the first oil delivery pipe (44) is connected to an oil recovery assembly (45).

5. The throttling and well-killing device with a sand control structure according to claim 4, characterized in that: The oil recovery assembly (45) comprises a filter box (451), the filter box (451) is slidably connected to a second filter screen (452), the filter box (451) is connected to an oil storage tank (454) via a second oil delivery pipe (453), and the lower side of the oil storage tank (454) is threadedly sealed and connected to a second sealing cover (455).

6. The throttling and well-killing device with a sand control structure according to claim 1, characterized in that: The energy-saving structure (5) comprises a support base (51), the support base (51) is rotatably connected to a top cover (52), a photovoltaic panel (53) is inlaid on the top cover (52), the photovoltaic panel (53) is electrically connected to a storage battery (54), a moving component (55) is slidably connected to the support base (51), a cleaning component (56) and a flushing component (57) are fixed on the upper side of the moving component (55), and the flushing component (57) is located on the right side of the cleaning component (56).

7. The throttling and well-killing device with a sand control structure according to claim 6, characterized in that: The moving assembly (55) comprises a second motor box (551), and a motor in the second motor box (551) drives a screw rod (552) to rotate, thereby driving a sliding block (553) to slide on the top cover (52).

8. The throttling and well-killing device with a sand control structure according to claim 6, characterized in that: The cleaning assembly (56) comprises a U-shaped plate (561), and the U-shaped plate (561) is telescopically adjusted to adjust the position of the cleaning brush (564) on the second support plate (563) through the electric telescopic rod (562).

9. The throttling and well-killing device with a sand control structure according to claim 6, characterized in that: The flushing assembly (57) comprises a flushing nozzle (571), and the flushing nozzle (571) is connected to a water tank (573) via a water pipe (572).

Images