A sand and gravel filtering device used in the oil production process

Abstract

The present invention relates to the technical field of sand and gravel filtering and discloses a sand and gravel filtering equipment for use in the process of oil extraction, including a separation component, a liquid drainage component is provided at the upper end of the separation component, a sand discharge component is provided at the bottom end of the separation component, the separation component includes a column shell, an inner column is fixedly sleeved inside the column shell, a conical shell is fixedly connected to the bottom end of the column shell, a first conical shell is fixedly sleeved inside the conical shell, a pair of first flange rings are fixedly sleeved between the column shell and the conical shell, a second conical shell is fixedly connected at the bottom end of the conical shell, a pair of second flange rings are fixedly sleeved between the second conical shell and the conical shell, the upper end of the column shell is fixedly connected to a bottom plate, the upper end of the bottom plate is fixedly installed with an upper plate, and tangential connecting channels are provided on the column shell and the inner column. The device can solve the problem that a large number of large particles of sand and gravel are easily blocked at the discharge outlet.

Description

Technical Field

[0001] The present invention relates to the technical field of sand and gravel filtering, and more particularly to sand and gravel filtering equipment used in the process of oil production. Background Art

[0002] During the oil extraction process, many sand and gravel impurities are mixed in. If not filtered out, the presence of these sands may cause damage to equipment, such as wear and tear on pumps, pipelines and other processing equipment. It may also clog the oil layer and reduce production efficiency. Therefore, it is necessary to effectively remove these sands to ensure smooth production, extend equipment life and improve economic benefits.

[0003] Therefore, under the existing technology, a cyclone sand removal device is used to remove sand and gravel from oil. However, the cyclone sand removal device under the existing technology still has the following shortcomings in actual use:

[0004] First, when the cyclone sand removal device under the existing technology is performing sand removal, the fluid enters along the tangential direction at a certain pressure, forming a rotating flow. During the rotation process, the solid particles with higher density are thrown to the wall due to centrifugal force, and move downward along the tapered section, and are finally discharged from the bottom flow port. The liquid with lower density gathers in the central low-pressure area, forming an upward internal vortex, and is discharged through the overflow port. However, in actual conditions, there are still some fine sand and gravel particles. Due to their small volume and light weight, they will rotate and flow above the cylinder with the liquid with lower density and are difficult to fall. Therefore, they are likely to gather in the central low-pressure area with the liquid with lower density, resulting in the separation performance of the device being limited.

[0005] Secondly, when the cyclone sand removal device under the existing technology is removing sand, large particles of sand and gravel with higher density will be discharged at the bottom of the conical section. When the amount of these large particles of sand and gravel is large, it is easy to cause blockage at the bottom of the conical section. The cyclone sand removal device under the existing technology cannot effectively solve this blockage problem.

[0006] Therefore, in order to solve the above problems, it is necessary to provide a sand and gravel filtering device for use in the oil production process. Summary of the Invention

[0007] In order to overcome the above-mentioned defects of the prior art, the present invention provides a sand and gravel filtering device for use in the oil production process to solve the problems existing in the above-mentioned background technology.

[0008] The present invention provides the following technical solution: a sand and gravel filtering device for use in an oil production process, comprising a separation assembly, wherein the upper end of the separation assembly is provided with a liquid discharge assembly, and the lower end of the separation assembly is provided with a sand discharge assembly;

[0009] The cam is fixedly provided with a first end in contact with the bottom end of the conical shell, and a second end in contact with the conical shell is fixedly provided with a first flange ring. The cam is fixedly provided with a first flange ring and a second flange ring. The cam is fixedly provided with a first flange ring and a second flange ring. The cam is fixedly provided with a first flange ring and a second flange ring. The cam is fixedly provided with a second flange ring. The cam is fixedly provided with a second flange ring.

[0010] Furthermore, the drainage assembly includes a pipe sleeve bin, which is fixedly installed on the upper end of the upper plate, a sand collecting trough is opened inside the pipe sleeve bin, and a cover sleeve is provided at the upper end of the pipe sleeve bin, a filter ring is fixedly sleeved between the inner wall of the cover sleeve bin and the inner wall of the pipe sleeve bin, a sealing ring is fixedly sleeved at the outer ends of the pipe sleeve bin and the cover sleeve bin, a lower connecting flange is fixedly sleeved at the inner ring of the cover sleeve bin, an overflow pipe is fixedly sleeved at the inner ring of the lower connecting flange, the upper end of the lower connecting flange is fixedly connected to the upper connecting flange, the inner ring of the upper connecting flange is fixedly sleeved to the upper connecting pipe, the upper end of the upper connecting pipe is fixedly connected to the drainage pipe, and a thin tube is fixedly connected to the outer side of the sealing ring.

[0011] Furthermore, the sand removal assembly includes a bottom connecting ring, which is fixedly mounted on the bottom end of the second conical cylinder, and the bottom connecting ring is provided with evenly distributed through holes, and the bottom end of the bottom connecting ring is fixedly mounted with an upper cavity column, the internal space of the upper cavity column is connected with the outside through the through hole, the bottom of the upper cavity column is movably sleeved with a movable column sleeve, the inner wall of the movable column sleeve is provided with a pressure-bearing ring leaf, the outer side of the bottom end of the upper cavity column is fixedly sleeved with a fixed sleeve, the inner side of the bottom end of the fixed sleeve is fixedly sleeved with a lower cavity column, and the upper part of the lower cavity column is movably sleeved with the bottom section of the movable column sleeve.

[0012] Furthermore, the bottom of the lower cavity column is fixedly connected to a bottom ring disk, and the bottom of the bottom ring disk is provided with evenly distributed rail grooves, the upper ends of the rail grooves are provided with inner holes, the bottom ends of the inner holes are fixedly connected to connecting pipes, and the bottom ends of the connecting pipes are fixedly connected to the cavity tubes, and the inner holes connect the bottom space of the lower cavity column with the cavity tube, and the inner wall of the cavity tube is fixedly sleeved with a limiting ring near the outer side of the connecting tube, and the interior of the cavity tube is movably sleeved with a piston column.

[0013] Furthermore, the bottom space of the lower cavity column and the connecting space between the cavity cylinder and the inner hole are filled with hydraulic oil, the outer ends of the piston columns are fixedly connected to the bottom connecting plates, the outer sides of the bottom connecting plates and the inner wall of the rail groove are fixedly connected with return springs, the inner ends of the bottom connecting plates are fixedly connected to the bottom curved blocks, the adjacent end faces of the bottom curved blocks contact and close with each other when the piston column is at the innermost side, and the adjacent end faces of the bottom curved blocks are provided with inclined surfaces.

[0014] Furthermore, the bottom end of the bottom ring disk is fixedly connected to a bottom outer sleeve, and the wall surface of the bottom outer sleeve is provided with evenly distributed mounting grooves, and the mounting grooves are respectively aligned with the closed parts of the adjacent end faces of the bottom curved block, and air boxes are fixedly installed on the mounting grooves, and evenly distributed air nozzles are fixedly installed on the inner side surface of the air box, and the outer side of the air box is fixedly connected to a fixed pipe, and an air ring is fixedly installed on the outer end of the fixed pipe, and an air pump is fixedly installed on the upper end of the bottom ring disk, and an air pipe is connected between the output end of the air pump and the air ring.

[0015] Technical effects and advantages of the present invention:

[0016] The present invention is provided with a drainage component. When the oil forms a rotating flow at the inner wall of the inner cylinder, the solid particles with higher density are thrown to the wall due to centrifugal force and move downward, and the liquid with lower density gathers to the central low-pressure area to form an upward internal vortex, and moves upward through the overflow pipe, and finally discharged outward from the drainage pipe. Some fine particle impurities will also rotate and flow with the liquid at the inner wall of the inner cylinder due to their light weight. Due to their small volume and light weight, it is difficult for them to move downward. They move upward with part of the liquid at the wall of the inner cylinder, and part of the liquid is filtered from the filter ring. The fine particles are intercepted and stay in the sand collecting trough for collection. After this part of the liquid is separated from the fine impurity particles, it is discharged outward from the thin tube. In this way, the sand and gravel separation performance of the device can be improved.

[0017] The present invention is provided with a sand discharge component. When solid particles with larger density are thrown to the wall due to centrifugal force and move downward, these large solid particles will move downward through the second conical cylinder and be discharged at the bottom channel block. When the number of these large solid particles is too large, it is easy to cause blockage at the bottom channel block. When the actual channel diameter of the inner wall of the bottom channel block continues to shrink, as the solid particles above continue to impact and move downward, the pressure of the flow in the pipe will continue to increase. Therefore, when the pressure continues to increase, the solid particles will continue to impact the pressure-bearing ring leaf, causing the pressure-bearing ring leaf and the movable column sleeve to move downward in the lower cavity column, thereby pushing the piston column outward through the hydraulic oil injected into the lower cavity column, and the movable column The outward movement of the plug drives the bottom curved block connected to it to move outward, thereby separating the adjacent end faces of the bottom curved block and using the inclined surface to create a gap channel. The air pump is started to blow through the air pipe, and high-pressure airflow is injected into the air box and blown inward from the air nozzle. The blowing direction of the air nozzle is aligned with the gap channel, thereby separating the mutually adhered solid particles that are blocked inside the bottom curved block from each other, thereby solving the sand and gravel blockage problem here. The sand and gravel particles are discharged outward from the bottom of the bottom curved block, and some sand and gravel particles are discharged from the gap channel and enter the inside of the pipe of the bottom outer sleeve, and will eventually be discharged outward from the bottom of the bottom outer sleeve. The above method solves the sand and gravel discharge blockage problem of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the separation component structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the liquid discharge component of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the sand discharge component of the present invention.

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the sand discharge component of the present invention.

[0023] Figure 6 For attachment Figure 5 An enlarged schematic diagram of the structure at point A is shown.

[0024] Figure 7 It is a structural schematic diagram of the bottom track curved block of the present invention.

[0025] The accompanying drawings are marked as follows: 1. separation assembly; 101. column shell; 102. inner column; 103. conical shell; 104. first conical cylinder; 105. first flange ring; 106. second conical cylinder; 107. second flange ring; 108. bottom plate; 109. upper plate; 110. tangential connection channel; 111. injection channel; 112. fixed plate; 113. intermediate pipe; 114. input pipe; 115. pipe flange; 2. drainage assembly; 201. pipe sleeve; 202. sand collecting trough; 203. cover sleeve; 204. filter ring; 205. sealing ring; 206. lower flange; 207. overflow pipe; 208. upper flange; 209. upper connecting pipe; 210. Drain pipe; 211. Capillary tube; 3. Sand discharge assembly; 301. Bottom connecting ring; 302. Through hole; 303. Upper cavity column; 304. Movable column sleeve; 305. Pressure ring leaf; 306. Fixed outer sleeve; 307. Lower cavity column; 308. Bottom ring plate; 309. Rail groove; 310. Inner hole; 311. Connecting pipe; 312. Cavity cylinder; 313. Limiting ring; 314. Piston column; 315. Bottom connecting plate; 316. Return spring; 317. Bottom curved block; 318. Inclined surface; 319. Bottom outer sleeve; 320. Mounting groove; 321. Air box; 322. Air nozzle; 323. Fixed pipe; 324. Air ring; 325. Air pump; 326. Air pipe. DETAILED DESCRIPTION

[0026] The technical solutions of the present invention will be described clearly and completely below in conjunction with the drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The sand and gravel filtering equipment used in the oil production process involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained without creative work by ordinary technicians in this field fall within the scope of protection of the present invention.

[0027] Reference Figure 1 The present invention provides a sand and gravel filtering device for use in an oil production process, comprising a separation component 1, a liquid discharge component 2 being provided at the upper end of the separation component 1, and a sand discharge component 3 being provided at the bottom end of the separation component 1;

[0028] In this embodiment, the separation component 1 is used to input the mined oil, the drainage component 2 is used to separate sand and gravel and discharge the oil after sand removal, and the sand discharge component 3 is used to discharge sand and gravel, and can prevent excessive large-particle sand and gravel from clogging the discharge port. The specific structure and working principle of the above components will be described in detail later.

[0029] Reference Figure 2 and Figure 3The separation component 1 includes a column shell 101, an inner column 102 is fixedly sleeved inside the column shell 101, a conical shell 103 is fixedly sleeved inside the conical shell 103, a first conical cylinder 104 is fixedly sleeved between the column shell 101 and the conical shell 103, a pair of first flange rings 105 are fixedly sleeved between the column shell 101 and the conical shell 103, a second conical cylinder 106 is fixedly connected to the bottom end of the conical shell 103, a pair of second flange rings 107 are fixedly sleeved between the second conical cylinder 106 and the conical shell 103, and the upper end of the column shell 101 is fixedly connected to the bottom Plate 108, an upper plate 109 is fixedly installed on the upper end of the bottom plate 108, a tangential connecting channel 110 is opened on the cylindrical shell 101 and the inner cylindrical cylinder 102, and an injection channel 111 is fixedly connected to the tangential connecting channel 110. The injection channel 111 is connected to the tangential connecting channel 110 along the tangential direction of the inner wall of the inner cylindrical cylinder 102, and a fixed plate 112 is fixedly installed at the end of the injection channel 111. The fixed plate 112 is fixedly connected to an intermediate pipe 113, and the end of the intermediate pipe 113 is fixedly connected to an input pipe 114, and a pair of pipe flanges 115 are fixedly sleeved between the intermediate pipe 113 and the input pipe 114;

[0030] In this embodiment, the extracted oil is input from the input pipe 114, and is injected into the interior of the inner cylinder 102 along the tangential direction of the inner wall of the inner cylinder 102 through the injection channel 111, and a rotating flow is formed there. During the rotation process, solid particles with higher density are thrown to the wall due to centrifugal force, and move downward along the conical section, and are finally discharged from the bottom flow port. The liquid with lower density gathers in the central low-pressure area, forming an upward internal vortex, which is discharged through the overflow port. The above-mentioned separation and sand removal method will be described in detail later.

[0031] Reference Figure 2 and Figure 3 The drainage assembly 2 includes a tube sleeve warehouse 201, which is fixedly mounted on the upper end of the upper plate 109. A sand collecting trough 202 is provided inside the tube sleeve warehouse 201. A cover warehouse 203 is provided on the upper end of the tube sleeve warehouse 201. A filter ring 204 is fixedly sleeved between the inner wall of the cover warehouse 203 and the inner wall of the tube sleeve warehouse 201. A sealing ring 204 is fixedly sleeved at the outer ends of the tube sleeve warehouse 201 and the cover warehouse 203. 05. A lower flange 206 is fixedly sleeved on the inner ring of the cover sleeve 203. An overflow pipe 207 is fixedly sleeved on the inner ring of the lower flange 206. An upper flange 208 is fixedly sleeved on the upper end of the lower flange 206. An upper connecting pipe 209 is fixedly sleeved on the inner ring of the upper connecting flange 208. A drain pipe 210 is fixedly connected to the upper end of the upper connecting pipe 209. A thin tube 211 is fixedly connected to the outer side of the sealing ring 205.

[0032] In this embodiment, when the oil forms a rotating flow at the inner wall of the inner cylinder 102, the solid particles with higher density are thrown to the wall due to centrifugal force and move downward, and the liquid with lower density gathers in the central low-pressure area to form an upward internal vortex, and moves upward through the overflow pipe 207, and is finally discharged outward from the discharge pipe 210. Some fine particle impurities will also rotate and flow with the liquid at the inner wall of the inner cylinder 102 due to their light weight. Due to their small volume and light weight, it is difficult for them to move downward. With part of the liquid, they move upward at the wall of the inner cylinder 102, and part of the liquid is filtered from the filter ring 204. The fine particles are intercepted and stay in the sand collecting tank 202 for collection. After the part of the liquid is separated from the fine impurity particles, it is discharged outward from the capillary 211. In this way, the sand and gravel separation performance of the device can be improved.

[0033] Reference Figure 4-Figure 7The sand discharge assembly 3 includes a bottom connecting ring 301, which is fixedly mounted on the bottom end of the second conical cylinder 106. The bottom connecting ring 301 is provided with evenly distributed through holes 302. The bottom end of the bottom connecting ring 301 is fixedly mounted with an upper cavity column 303. The internal space of the upper cavity column 303 is communicated with the outside through the through hole 302. The bottom of the upper cavity column 303 is movably sleeved with a movable column sleeve 304. The inner wall of the movable column sleeve 304 is provided with a pressure-bearing ring leaf 305. The outer side of the bottom end of the upper cavity column 303 is fixedly sleeved with a fixed sleeve 306. The inner side of the bottom end of the fixed sleeve 306 is fixedly sleeved with a lower cavity column 307. The upper part of the lower cavity column 307 is movably connected to the bottom section of the movable column sleeve 304, and the bottom of the lower cavity column 307 is fixedly connected to a bottom ring disk 308, and the bottom of the bottom ring disk 308 is provided with evenly distributed rail grooves 309, and the upper ends of the rail grooves 309 are provided with inner holes 310, and the bottom ends of the inner holes 310 are fixedly connected to connecting pipes 311, and the bottom ends of the connecting pipes 311 are fixedly connected to cavity tubes 312, and the inner holes 310 connect the bottom space of the lower cavity column 307 with the cavity tube 312, and the inner wall of the cavity tube 312 is fixedly connected with a limiting ring 313 near the outer side of the connecting pipe 311. The inner movable sleeve is connected with a piston column 314, and the bottom space of the lower cavity column 307 and the communicating space between the cavity cylinder 312 and the inner hole 310 are filled with hydraulic oil. The outer end of the piston column 314 is fixedly connected to a bottom connecting plate 315, and a return spring 316 is fixedly connected between the outer side of the bottom connecting plate 315 and the inner wall of the rail groove 309. The inner end of the bottom connecting plate 315 is fixedly connected to a bottom curved block 317. The adjacent end surfaces of the bottom curved block 317 contact and close with each other when the piston column 314 is at the innermost side. The adjacent end surfaces of the bottom curved block 317 are provided with inclined surfaces 318. The bottom end of the bottom ring disk 308 is fixed A bottom outer raceway sleeve 319 is fixedly connected, and evenly distributed mounting grooves 320 are opened on the wall surface of the bottom outer raceway sleeve 319. The mounting grooves 320 are respectively aligned with the closed parts of the adjacent end surfaces of the bottom raceway curved block 317. An air box 321 is fixedly installed on the mounting grooves 320, and evenly distributed air nozzles 322 are fixedly installed on the inner side surface of the air box 321. A fixed pipe 323 is fixedly connected to the outer side of the air box 321, and an air ring 324 is fixedly installed on the outer end of the fixed pipe 323. An air pump 325 is fixedly installed on the upper end of the bottom ring disk 308, and an air pipe 326 is connected between the output end of the air pump 325 and the air ring 324;

[0034] In this embodiment, when solid particles with larger density are thrown to the wall due to centrifugal force and move downward, these large solid particles will move downward through the second conical cylinder 106 and be discharged at the bottom channel block 317. When the number of these large solid particles is too large, it is easy to get clogged at the bottom channel block 317. When the actual channel diameter of the inner wall of the bottom channel block 317 continues to shrink, as the solid particles above continue to impact and move downward, the pressure of the flow in the tube will continue to increase. Therefore, when the pressure continues to increase, the solid particles will continue to impact the pressure-bearing ring leaf 305, causing the pressure-bearing ring leaf 305 to move downward together with the movable column sleeve 304 in the lower cavity column 307, thereby pushing the piston column 314 outward through the hydraulic oil injected into the lower cavity column 307, and the piston column 314 moves toward The external movement drives the bottom curved block 317 connected to it to move outward, thereby separating the adjacent end faces of the bottom curved block 317 and using the inclined surface 318 to generate a gap channel. The air pump 325 is started to blow through the air pipe 326, and the high-pressure air flow is injected into the air box 321 and blown inward from the air nozzle 322. The blowing direction of the air nozzle 322 is aligned with the gap channel, so that the solid particles that are stuck inside the bottom curved block 317 and adhere to each other are separated from each other, thereby solving the sand and gravel blockage problem here. The sand and gravel particles are discharged outward from the bottom of the bottom curved block 317, and some sand and gravel particles are discharged from the gap channel and enter the pipe inside the bottom outer sleeve 319, and will eventually be discharged outward at the bottom of the bottom outer sleeve 319. The above method solves the sand and gravel discharge blockage problem of the device.

[0035] The working principle of the present invention is as follows: when the oil forms a rotating flow at the inner wall of the inner cylinder 102, the solid particles with higher density are thrown to the wall due to centrifugal force and move downward, while the liquid with lower density gathers in the central low-pressure area, forming an upward internal vortex, and moves upward through the overflow pipe 207, and is finally discharged from the drain pipe 210. Some fine particles of impurities will also rotate with the liquid on the inner wall of the inner cylinder 102 due to their light weight. Due to their small size and light weight, it is difficult for them to move downward. They move upward with part of the liquid on the wall of the inner cylinder 102, and part of the liquid is discharged from the filter ring 210. 04, the fine particles are intercepted and collected in the sand collecting tank 202. After the liquid is separated from the fine impurity particles, it is discharged from the capillary 211. In this way, the performance of the sand and gravel separation of the device can be improved. When the solid particles with higher density are thrown to the wall due to centrifugal force and move downward, these large solid particles will move downward through the second conical cylinder 106 and be discharged at the bottom channel block 317. When the number of these large solid particles is too large, it is easy to cause blockage at the bottom channel block 317. When the actual channel diameter of the inner wall of the bottom channel block 317 continues to shrink, As the solid particles above continue to impact and move downward, the pressure of the fluid in the pipe will continue to increase. Therefore, when the pressure continues to increase, the solid particles will continue to impact the pressure-bearing ring leaf 305, causing the pressure-bearing ring leaf 305 and the movable column sleeve 304 to move downward in the lower cavity column 307, thereby pushing the piston column 314 outward through the hydraulic oil injected into the lower cavity column 307. The outward movement of the piston column 314 drives the bottom curved block 317 connected to it to move outward, thereby separating the adjacent end faces of the bottom curved block 317 and using the inclined surface 318 to create a gap channel, and the air pump 325 starts Blowing is performed through the air pipe 326, and high-pressure air flow is injected into the air box 321 and blown inward from the air nozzle 322. The blowing direction of the air nozzle 322 is aligned with the gap channel, so that the solid particles that are stuck inside the bottom road block 317 and adhere to each other are separated from each other, thereby solving the sand and gravel blockage problem here. The sand and gravel particles are discharged outward from the bottom of the bottom road block 317, and some sand and gravel particles are discharged from the gap channel and enter the inside of the pipeline of the bottom outer road sleeve 319, and will eventually be discharged outward from the bottom of the bottom outer road sleeve 319. The above method solves the sand and gravel discharge blockage problem of the device.

[0036] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0037] Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict.

[0038] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sand and gravel filtering device used in the process of oil extraction, characterized in that: It includes a separation component, wherein the upper end of the separation component is provided with a liquid discharge component, and the bottom end of the separation component is provided with a sand discharge component; The drainage assembly includes a pipe sleeve warehouse, a sand collecting trough is provided inside the pipe sleeve warehouse, a cover sleeve is provided at the upper end of the pipe sleeve warehouse, a filter ring is fixedly sleeved between the inner wall of the cover sleeve and the inner wall of the pipe sleeve, a sealing ring is fixedly sleeved at the outer ends of the pipe sleeve and the cover sleeve, a lower connecting flange is fixedly sleeved at the inner ring of the cover sleeve, an overflow pipe is fixedly sleeved at the inner ring of the lower connecting flange, an upper connecting flange is fixedly connected to the upper end of the lower connecting flange, an upper connecting pipe is fixedly sleeved to the inner ring of the upper connecting flange, a drainage pipe is fixedly connected to the upper end of the upper connecting pipe, and a thin tube is fixedly connected to the outer side of the sealing ring; The cam is fixedly mounted on the bottom of the cylinder, and the cam is connected to the top of the cylinder to form a circle, and the cam is connected to the top of the cylinder to form a circle. The bottom space and the communicating space between the cavity cylinder and the inner hole are filled with hydraulic oil, the outer end of the piston column is fixedly connected to the bottom connecting plate, the outer side of the bottom connecting plate is fixedly connected to the inner wall of the rail groove, the inner end of the bottom connecting plate is fixedly connected to the bottom curved block, the adjacent end faces of the bottom curved block contact and close with each other when the piston column is at the innermost side, the adjacent end faces of the bottom curved block are provided with inclined surfaces, the bottom end of the bottom ring disk is fixedly connected to the bottom outer track sleeve, the wall surface of the bottom outer track sleeve is provided with evenly distributed mounting grooves, the mounting grooves are respectively aligned with the closed parts of the adjacent end faces of the bottom curved block, the mounting grooves are fixedly installed with air boxes, the inner side surface of the air box is fixedly installed with evenly distributed air nozzles, the outer side of the air box is fixedly connected with a fixed pipe, the outer end of the fixed pipe is fixedly installed with an air ring, the upper end of the bottom ring disk is fixedly installed with an air pump, and an air pipe is connected between the output end of the air pump and the air ring.

2. The sand and gravel filtering equipment for use in oil production according to claim 1, characterized in that: The separation component includes a column shell, an inner column is fixedly sleeved inside the column shell, a conical shell is fixedly connected to the bottom end of the column shell, a first conical shell is fixedly sleeved inside the conical shell, a pair of first flange rings are fixedly sleeved between the column shell and the conical shell, the bottom end of the conical shell is fixedly connected to the second conical shell, a pair of second flange rings are fixedly sleeved between the second conical shell and the conical shell, the upper end of the column shell is fixedly connected to the bottom plate, the upper end of the bottom plate is fixedly installed with the upper plate, a tangential connecting channel is opened on the column shell and the inner column, the tangential connecting channel is fixedly connected to the injection channel, the injection channel is connected to the tangential connecting channel along the tangential direction of the inner wall of the inner column, the end of the injection channel is fixedly installed with a fixed plate, the fixed plate is fixedly connected with an intermediate pipe, the end of the intermediate pipe is fixedly connected with an input pipe, and a pair of pipe flanges are fixedly sleeved between the intermediate pipe and the input pipe.

3. The sand and gravel filtering equipment for use in oil production according to claim 1, characterized in that: The pipe sleeve bin is fixedly installed on the upper end of the upper plate, and the bottom connecting ring is fixedly installed on the bottom end of the second conical cylinder.

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