Sand filtering equipment for oil exploitation

Abstract

The invention relates to sand filtering equipment for oil exploitation, which is applied to the field of solid-liquid separation and comprises a rotational flow sand filter body, the rotational flow sand filter body comprises a liquid inlet end and a liquid outlet end, and one end, far away from the rotational flow sand filter body, of the liquid outlet end is communicated with a drilling fluid buffer cylinder; the centrifugal deformation type filtering drum is additionally arranged on the basis of an existing rotational flow sand filter to capture tiny solids, the filtering effect of the sand filter is effectively improved, on the basis that the structure of the original sand filter is not damaged, operation is stable, maintenance is convenient, the centrifugal deformation type filtering drum is rapidly deformed and reset by controlling the rotating speed of the centrifugal deformation type filtering drum, and the service life of the sand filter is prolonged. In this way, tiny solids attached to the centrifugal deformation type filtering drum can be shaken off, so that self-cleaning of the centrifugal deformation type filtering drum is achieved, the trouble of manual regular disassembly and cleaning is omitted, the centrifugal deformation type filtering drum can keep an efficient filtering effect, and the filtering effect of the rotational flow sand filter can be effectively improved.

Description

Technical Field

[0001] The invention relates to a sand filter device for oil mining, in particular to a sand filter device for oil mining used in the field of solid-liquid separation. Background Art

[0002] Drilling fluid, also known as drilling mud, is an indispensable fluid in oil extraction engineering. It is mainly used to cool the drill bit, carry cuttings, stabilize the well wall, balance the formation pressure, etc. However, the drilling fluid carries a lot of sand, so it needs to be filtered. At present, the mainstream method is to use cyclone sand filter to filter the sand, but the cyclone sand filter is easy to clog.

[0003] In order to solve the problem of easy clogging of cyclone sand filters, a cyclone sand filter in the market adopts a self-cleaning design and has a certain market share.

[0004] The specification of Chinese patent CN112755638A discloses a reciprocating cyclone separator sand filtering device, which includes a cyclone separator body, a reciprocating rotating cam filtering mechanism, a rotating sealing mechanism and a reciprocating anti-clogging filtering mechanism. The oil-water-sand mixed liquid enters the cyclone tangentially through the inlet, and the mixed liquid flows through the spiral flow channel to generate a strong cyclone, so that the light oil phase becomes a spirally ascending inner cyclone and is discharged from the overflow port. The water phase is thrown to the cyclone tube close to the inner wall in a spiral state under the action of centrifugal force and is discharged from the bottom flow port. At the same time, the water phase is filtered by the reciprocating anti-clogging filtering device installed in the bottom flow pipe, and the heavy sand phase particles are thrown to the wall of the device under the action of inertial centrifugal force. The enriched liquid discharged from the sand outlet flows through the tee, and the enriched liquid flowing through the tee is filtered by the reciprocating rotating cam filtering mechanism and the sand phase is discharged. During the filtering process, the rotating sealing device installed on the tee pipe fitting is responsible for controlling the opening and closing of the two outlets of the tee pipe fitting. The cyclone separator sand filter device can separate the water phase, oil phase and sand phase, and fully remove sand.

[0005] The specification of Chinese patent CN102512870B discloses an automatic backwashing combined filter, which includes a sand filter tank body. The top of the sand filter tank body is provided with a sand inlet, a backwash outlet and an air inlet and outlet valve. A water-sand cyclone is provided in the sand filter tank body, and its bottom outlet passes through the bottom plate of the sand filter tank body and is connected to the dust and sand tank. One end of the overflow pipe connected to the water-sand cyclone tank body extends into the water-sand cyclone tank body, and the other end is connected to the junction of the outflow pipe and the backwash drainage pipe. An electromagnetic three-way valve is provided at the junction. Both ends of the outflow pipe are arranged in the sand filter tank body. A water inlet pipe passing through the sand filter tank body is also connected to the water-sand cyclone tank body. The bottoms of two screen filters arranged in the sand filter tank body are connected to a drainage pipe passing through the bottom plate of the sand filter tank body. Both ends of the backwash drainage pipe pass through the sand filter tank body and are correspondingly connected to the drainage pipe. An impeller is provided in the sand filter tank body, and the impeller is powered by a motor fixed to the sand filter tank body.

[0006] Although the existing sand filter can realize the self-cleaning function, the sand filtering effect is still limited, the leakage rate of tiny solids is high, and the whole device is complicated and difficult to maintain, with high operating costs and instability. Summary of the invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to improve the filtering effect on tiny solids.

[0008] In order to solve the above problems, the present invention provides a sand filtering device for oil mining, comprising a cyclone sand filter body, the cyclone sand filter body comprising a liquid inlet end and a liquid outlet end, and the end of the liquid outlet end away from the cyclone sand filter body is connected to a drilling fluid buffer cylinder, the lower end of the drilling fluid buffer cylinder is connected to a liquid separation pipe, and the lower end of the liquid separation pipe is fixedly connected to a filter box, a filter chamber connected to the liquid separation pipe is provided inside the filter box, a driving motor is installed in the middle of the upper end of the filter box, a centrifugal variable filter drum is placed in the filter chamber, and the upper end of the centrifugal variable filter drum is fixedly connected to an output port of the driving motor. The filter chamber is provided with a rotating seat on the inner wall at the lower end thereof, and the lower end of the centrifugal variable filter drum is fixedly connected to the rotating seat. A rotating joint is installed on the inner wall of the filter box located below the centrifugal variable filter drum, and the rotating joint penetrates the rotating seat and is connected to the lower end of the centrifugal variable filter drum. The lower end of the filter box is also connected to a liquid outlet pipe connected to the rotating joint. An annular sand collecting trough is also provided on the inner wall at the lower end of the filter chamber located outside the centrifugal variable filter drum. A plurality of drop openings connected to the filter chamber are provided on the inner wall at the lower end of the filter box, and an electromagnetic valve is installed in the drop opening. An electric ball valve is installed at the water outlet of the drilling fluid buffer cylinder, and the electric ball valve includes a timing opening and closing module. The filter box includes a timing cleaning module and a speed adjustment module. The timing cleaning module is electrically connected to the timing opening and closing module, and the speed adjustment module is electrically connected to the drive motor through the control processor.

[0009] In the above-mentioned sand filtering equipment used in oil mining, a filter is added to the water outlet of the existing cyclone sand filter to capture tiny solids, simplify the structure of the sand filter, and effectively improve the operating stability and sand filtering effect of the sand filter.

[0010] As a further improvement of the present application, the centrifugal variable type filter drum includes an upper and lower drum cover, and a plurality of rigid drum ribs which are circumferentially distributed with equal intervals are fixedly connected between the two drum covers, a plurality of elastic drum ribs which are circumferentially distributed with equal intervals are also fixedly connected between the two drum covers, and a flexible filter sheet is fixedly connected between each two adjacent elastic drum ribs, and the rigid drum ribs connect the upper and lower drum covers together to form a whole, so that the driving motor can drive the entire centrifugal variable type filter drum to rotate, the function of the flexible filter sheet is to capture and filter tiny solids in the drilling fluid, thereby effectively improving the sand filtering effect of the drilling fluid, and the function of the elastic drum ribs is to bulge outward under centrifugal force to deform the flexible filter sheet, thereby realizing self-cleaning of the flexible filter sheet.

[0011] As a further improvement of the present application, a connecting seat is provided at the geometric center of the plurality of elastic drum ribs, and each elastic drum rib is fixedly connected to an elastic stretch belt fixedly connected to the connecting seat. The elastic stretch belt can quickly reset the elastic drum rib by relying on the rebound force, thereby shaking off the tiny sand particles attached to the flexible filter sheet, effectively improving the self-cleaning effect.

[0012] As a further improvement of the present application, the elastic drum rib includes a middle counterweight section, and the upper and lower ends of the counterweight section are fixedly connected with elastic sections. The counterweight section plays the role of a counterweight. Under centrifugal force, the counterweight section will be thrown out first, thereby driving the elastic section to deform, accelerating the deformation and resetting speed of the elastic drum rib, thereby effectively improving the self-cleaning effect.

[0013] As another improvement of the present application, the rotary shock-absorbing pad includes a rigid base, and the lower end of the rigid base is fixedly connected to an elastic connecting seat, the inner wall of the elastic connecting seat is provided with a buffer cavity, and a plurality of elastic columns distributed around with equal intervals are fixedly connected in the buffer cavity. Considering that the centrifugal variable type filter drum will have slight shaking when the driving motor drives the centrifugal variable type filter drum to rotate, the elasticity of the elastic connecting seat and the elastic column is used to reduce the shock of the centrifugal variable type filter drum, thereby effectively improving the stability of the centrifugal variable type filter drum during rotation. Moreover, the length of the elastic drum ribs will change slightly during the deformation process, so a buffer cavity is provided to provide deformation space for the elastic drum ribs.

[0014] As another improvement of the present application, a plurality of symmetrically distributed paddles are placed in the annular sand collecting trough, both side walls of the annular sand collecting trough are connected with a slide groove, and the inner wall of the slide groove is slidably connected with an annular rack fixedly connected to the paddle, and a driving motor electrically connected to the timing cleaning module is installed on the inner wall of the lower end of the slide groove, and the output end of the driving motor is connected to a gear meshing with the annular rack, and the filtered sand is deposited in the annular sand collecting trough. During the self-cleaning process, the driving motor drives the gear to mesh with the annular rack, so that the paddle rotates in the annular sand collecting trough, so as to push the sand to the drop port for discharge.

[0015] As a further improvement and supplement to the present application, the inner wall of the filter chamber is also fixedly inlaid with a magnetic ring, and the magnetic ring is opposite to the counterweight section, and the side wall of the counterweight section is fixedly inlaid with a magnetic pad that magnetically repels the magnetic ring. When the elastic drum ribs are thrown outward under the centrifugal force, in order to prevent the elastic drum ribs from being further thrown out and causing structural damage to the entire centrifugal deformation filter drum, a magnetic ring is provided to utilize its magnetic repulsion force to limit further movement of the elastic drum ribs, and when the elastic drum ribs return to their original shape, the magnetic repulsion force of the magnetic ring can also accelerate the rebound speed of the elastic drum ribs, allowing the elastic drum ribs to quickly deform and reset back and forth, thereby producing a shaking effect, shaking off tiny solids attached to the flexible filter sheet.

[0016] In summary, by adding a centrifugal variable filter drum on the basis of the existing cyclone sand filter, the capture of tiny solids can be achieved, and the filtering effect of the sand filter can be effectively improved. On the basis of not destroying the structure of the original sand filter, the operation is stable and maintenance is convenient. In addition, by controlling the rotation speed of the centrifugal variable filter drum to make it deform and reset quickly, the tiny solids attached to the centrifugal variable filter drum can be shaken off, thereby realizing the self-cleaning of the centrifugal variable filter drum, eliminating the trouble of manual regular disassembly and cleaning, allowing the centrifugal variable filter drum to maintain a high efficiency filtering effect, and can effectively improve the filtering effect of the cyclone sand filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of the entire device of the first embodiment of the present application; Figure 2 This is a front cross-sectional view of the filter box of the first embodiment of the present application; Figure 3 This is a three-dimensional diagram of the centrifugal deformation filter drum before deformation according to the first embodiment of the present application; Figure 4 This is a three-dimensional diagram of the centrifugal deformation filter drum after deformation according to the first embodiment of the present application; Figure 5 This is a top view of a cross-sectional view of a centrifugal variable filter drum according to a first embodiment of the present application; Figure 6This is a front cross-sectional view of a centrifugal variable filter drum according to a first embodiment of the present application; Figure 7 This is a front cross-sectional view of a single elastic drum rib in the first embodiment of the present application; Figure 8 This is a demonstration diagram of the deformation stage of the centrifugal deformation filter drum according to the first embodiment of the present application; Fig. 9 This is a front cross-sectional view of a rotary shock-absorbing pad according to a second embodiment of the present application; Fig.10 A three-dimensional diagram of a paddle and an annular rack according to a second embodiment of the present application; Fig.11 for Figure 2 Enlarged view of point A in the middle.

[0018] Description of the numbers in the figure: 1 cyclone sand filter body, 101 liquid inlet end, 102 liquid outlet end, 2 drilling fluid buffer cylinder, 3 liquid distribution pipe, 4 filter box, 401 filter chamber, 402 annular sand collecting trough, 403 slide, 5 drive motor, 6 centrifugal variable filter drum, 601 drum cover, 602 rigid drum ribs, 603 elastic drum ribs, 6031 elastic section, 6032 counterweight section, 604 flexible filter sheet, 605 connecting seat, 606 elastic stretching belt, 7 rotary shock-absorbing pad, 701 rigid base, 702 elastic connecting seat, 703 elastic column, 8 rotating seat, 9 rotary joint, 10 liquid outlet pipe, 11 solenoid valve, 12 paddle, 13 drive motor, 14 gear, 15 annular rack, 16 magnetic ring. DETAILED DESCRIPTION

[0019] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0020] The first implementation method: Figure 1 As shown, it includes a cyclone sand filter body 1, the cyclone sand filter body 1 includes a liquid inlet end 101 and a liquid outlet end 102, and the end of the liquid outlet end 102 away from the cyclone sand filter body 1 is connected to a drilling fluid buffer cylinder 2, the lower end of the drilling fluid buffer cylinder 2 is connected to a liquid distribution pipe 3, and the lower end of the liquid distribution pipe 3 is fixedly connected to a filter box 4, the filter box 4 is provided with a filter chamber 401 connected to the liquid distribution pipe 3, and a driving motor 5 is installed in the middle of the upper end of the filter box 4 (the specific model is selected according to actual needs and is not described in detail here); Figure 2 , 3 , 4, 5, 6 and Figure 8As shown, a centrifugal variable filter drum 6 is placed in the filter chamber 401, and the centrifugal variable filter drum 6 includes an upper and lower drum cover 601, and a plurality of rigid drum ribs 602 (preferably made of high-strength plastic material, and other materials can also be selected according to actual needs) are fixedly connected between the two drum covers 601 and are distributed around at equal intervals. A plurality of elastic drum ribs 603 (preferably made of polyurethane elastic material, and other materials can also be selected according to actual needs) are also fixedly connected between the two drum covers 601 and are distributed around at equal intervals. A flexible filter sheet 604 is fixedly connected between each adjacent two elastic drum ribs 603. The rigid drum ribs 602 connect the upper and lower drum covers 601 to form a whole, so that the driving motor 5 can drive the entire centrifugal variable filter drum 6 to rotate. The function of the flexible filter sheet 604 is to capture and filter tiny solids in the drilling fluid, thereby effectively improving the sand filtering effect of the drilling fluid. The function of the elastic drum ribs 603 is to move outward under centrifugal force. The elastic drum ribs 603 protrude to deform the flexible filter sheet 604, thereby realizing self-cleaning of the flexible filter sheet 604. A connecting seat 605 is arranged at the geometric center of the plurality of elastic drum ribs 603, and each elastic drum rib 603 is fixedly connected with an elastic stretching belt 606 (preferably made of rubber material, and other materials can also be selected according to actual needs) fixedly connected to the connecting seat 605. The elastic stretching belt 606 can quickly reset the elastic drum rib 603 by relying on the rebound force, thereby causing the tiny sand particles attached to the flexible filter sheet 604 to be shaken off, effectively improving the self-cleaning effect. The elastic drum rib 603 includes a middle counterweight section 6032, and the upper and lower ends of the counterweight section 6032 are fixedly connected with elastic sections 6031. The counterweight section 6032 plays the role of counterweight. Under the centrifugal force, the counterweight section 6032 will be thrown out first, thereby driving the elastic section 6031 to deform, accelerating the deformation and reset speed of the elastic drum rib 603, thereby effectively improving the self-cleaning effect. Figure 2 As shown, the upper end of the centrifugal variable filter drum 6 is fixedly connected with a rotary shock-absorbing pad 7 connected to the output end of the driving motor 5, the lower end inner wall of the filter chamber 401 is rotatably connected with a rotating seat 8, and the lower end of the centrifugal variable filter drum 6 is fixedly connected to the rotating seat 8, and the inner wall of the filter box 4 located below the centrifugal variable filter drum 6 is installed with a rotating joint 9 (which is the prior art, and the specific connection structure and working principle are well-known technologies for technicians in the relevant field, and are not described in detail here), and the rotating joint 9 penetrates the rotating seat 8 and is connected to the lower end of the centrifugal variable filter drum 6, and the lower end of the filter box 4 is also connected to a liquid outlet pipe 10 connected to the rotating joint 9, and the filter chamber 401 is located on the inner wall of the lower end of the outer side of the centrifugal variable filter drum 6. An annular sand collecting trough 402 is also provided, and a plurality of drop openings connected to the filter chamber 401 are provided on the inner wall of the lower end of the filter box 4, and a solenoid valve 11 is installed in the drop opening (the specific model is selected according to actual needs, and is not described in detail here); Figure 1It is shown that an electric ball valve is installed at the water outlet of the drilling fluid buffer cylinder 2 (the specific model is selected according to actual needs and will not be described in detail here), and the electric ball valve includes a timing opening and closing module, the filter box 4 includes a timing cleaning module and a speed adjustment module, the timing cleaning module is electrically connected to the timing opening and closing module, and the speed adjustment module is electrically connected to the drive motor 5 through the control processor (this part is the prior art, and the specific connection structure and control principle are well-known technologies to technical personnel in the relevant fields and will not be described in detail here).

[0021] The second implementation method: Fig. 9 As shown, the rotary shock-absorbing pad 7 includes a rigid base 701, and the lower end of the rigid base 701 is fixedly connected to an elastic connecting seat 702, the inner wall of the elastic connecting seat 702 is provided with a buffer cavity, and a plurality of elastic columns 703 distributed around with equal intervals are fixedly connected in the buffer cavity. Considering that the centrifugal variable filter drum 6 will have a slight shake when the driving motor 5 drives the centrifugal variable filter drum 6 to rotate, the elasticity of the elastic connecting seat 702 and the elastic column 703 is used to reduce the shock of the centrifugal variable filter drum 6, effectively improving the stability of the centrifugal variable filter drum 6 during rotation, and the length of the elastic drum rib 603 will change slightly during the deformation process, so a buffer cavity is set to provide deformation space for the elastic drum rib 603; Figure 2 , 10 and Fig.11 As shown, a plurality of symmetrically distributed paddles 12 are placed in the annular sand collecting trough 402, and the side walls of the annular sand collecting trough 402 are connected with a slide groove 403, and the inner wall of the slide groove 403 is slidably connected with an annular rack 15 fixedly connected to the paddle 12, and the inner wall of the lower end of the slide groove 403 is installed with a driving motor 13 (the specific model is selected according to actual needs and is not described in detail here), which is electrically connected to the timing cleaning module, and the output end of the driving motor 13 is connected with a gear 14 meshing with the annular rack 15, and the filtered sand is deposited in the annular sand collecting trough 402. During the self-cleaning process, the driving motor 13 drives the gear 14 to mesh with the annular rack 15, so that the paddle 12 rotates in the annular sand collecting trough 402, so as to push the sand to the discharge port for discharge; Figure 2 , 7As shown, the inner wall of the filter chamber 401 is also fixedly inlaid with a magnetic ring 16, and the magnetic ring 16 is directly opposite to the counterweight section 6032, and the side wall of the counterweight section 6032 is fixedly inlaid with a magnetic pad that magnetically repels the magnetic ring 16. When the elastic drum ribs 603 are thrown outward under the centrifugal force, in order to prevent the elastic drum ribs 603 from being further thrown out and causing structural damage to the entire centrifugal deformation filter drum 6, the magnetic ring 16 is provided to utilize its magnetic repulsion force to limit the further movement of the elastic drum ribs 603, and when the elastic drum ribs 603 return to their original shape, the magnetic repulsion force of the magnetic ring 16 can also accelerate the rebound speed of the elastic drum ribs 603, allowing the elastic drum ribs 603 to quickly deform and reset back and forth, thereby producing a shaking effect, shaking off tiny solids attached to the flexible filter sheet 604.

[0022] The working principle of this scheme is as follows: Filtration stage: the drilling fluid carrying a large amount of sand is first filtered through the cyclone sand filter body 1, and the large particles of sand are filtered out inside the cyclone sand filter body 1. The filtered drilling fluid is discharged from the liquid outlet 102, and the drilling fluid first enters the drilling fluid buffer cylinder 2, and then enters the filter chamber 401 through the liquid distribution pipe 3. The drilling fluid passes through the flexible filter sheet 604 inside the filter chamber 401 and enters the interior, thereby filtering tiny solids. Then the filtered pure drilling fluid is discharged from the rotary joint 9 and the liquid outlet pipe 10, and the filtered sand is deposited in the annular sand collecting tank 402, and then discharged by the solenoid valve 11; Self-cleaning stage: after the whole device has been running for a period of time, the timing cleaning module starts the timing opening and closing module to let the electric ball valve close the water outlet of the drilling fluid buffer cylinder 2, and the drilling fluid from the cyclone sand filter body 1 is temporarily stored in the drilling fluid buffer cylinder 2. After most of the drilling fluid inside the filter chamber 401 is filtered, the timing cleaning module starts the speed adjustment module again. The speed adjustment module controls the drive motor 5 to switch between high and low speeds. The drive motor 5 drives the centrifugal variable filter drum 6 to rotate by rotating the shock-absorbing pad 7. Under high-speed rotation, the elastic drum ribs 603 are thrown outward by the centrifugal force, changing from the original concave state to the outward convex state. Then the drive motor 5 instantly switches to the low-speed operation state. Under low-speed rotation, the elastic drum ribs 603 are subjected to elastic force. The elastic force of the stretching belt 606 and the magnetic repulsion force of the magnetic ring 16 cause the stretching belt 606 to quickly restore its original shape. By repeatedly controlling the driving motor 5 to operate at high and low speeds, the elastic drum tendons 603 can drive the flexible filter sheet 604 to repeatedly and rapidly concave and convex, thereby creating conditions for the flexible filter sheet 604 to shake, thereby shaking off the tiny solids attached to the flexible filter sheet 604, and then achieving a self-cleaning effect. The shaken-off sand falls into the annular sand collecting trough 402, and the self-cleaning module starts the driving motor 13. The driving motor 13 drives the gear 14 to engage with the annular rack 15, so that the paddle 12 rotates in the annular sand collecting trough 402. During the rotation of the paddle 12, the sand is pushed to the discharge port, and the solenoid valve 11 is opened to discharge the sand.

[0023] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A sand filter device for oil mining, characterized by: The invention comprises a cyclone sand filter body (1), the cyclone sand filter body (1) comprising a liquid inlet end (101) and a liquid outlet end (102), and one end of the liquid outlet end (102) away from the cyclone sand filter body (1) is connected to a drilling fluid buffer cylinder (2), the lower end of the drilling fluid buffer cylinder (2) is connected to a liquid dispensing pipe (3), and the lower end of the liquid dispensing pipe (3) is fixedly connected to a filter box (4), a filter chamber (401) connected to the liquid dispensing pipe (3) is provided inside the filter box (4), a drive motor (5) is installed in the middle of the upper end of the filter box (4), a centrifugal variable filter drum (6) is placed in the filter chamber (401), and the upper end of the centrifugal variable filter drum (6) is fixedly connected to a rotary shock-absorbing pad (7) connected to the output end of the drive motor (5), The inner wall at the lower end of the filter cavity (401) is rotatably connected to a rotating seat (8), and the lower end of the centrifugal variable filter drum (6) is fixedly connected to the rotating seat (8); the inner wall of the filter box (4) located below the centrifugal variable filter drum (6) is installed with a rotating joint (9), and the rotating joint (9) passes through the rotating seat (8) and is connected to the lower end of the centrifugal variable filter drum (6); the lower end of the filter box (4) is also connected to a liquid outlet pipe (10) connected to the rotating joint (9); the inner wall at the lower end of the filter cavity (401) located outside the centrifugal variable filter drum (6) is also provided with an annular sand collecting trough (402); the inner wall at the lower end of the filter box (4) is provided with a plurality of drop openings connected to the filter cavity (401), and electromagnetic valves (11) are installed in the drop openings; An electric ball valve is installed at the water outlet of the drilling fluid buffer cylinder (2), and the electric ball valve includes a timing opening and closing module. The filter box (4) includes a timing cleaning module and a speed adjustment module. The timing cleaning module is electrically connected to the timing opening and closing module, and the speed adjustment module is electrically connected to the drive motor (5) via a control processor.

2. The sand filter equipment for oil mining according to claim 1, characterized in that: The centrifugal deformation type filter drum (6) comprises two upper and lower drum covers (601), and a plurality of rigid drum ribs (602) distributed around the drum covers at equal intervals are fixedly connected between the two drum covers (601); a plurality of elastic drum ribs (603) distributed around the drum covers at equal intervals are also fixedly connected between the two drum covers (601), and a flexible filter sheet (604) is fixedly connected between every two adjacent elastic drum ribs (603).

3. The sand filter equipment for oil mining according to claim 2 is characterized in that: A connecting seat (605) is provided at the geometric center of the plurality of elastic drum ribs (603), and each elastic drum rib (603) is fixedly connected to an elastic stretching belt (606) that is fixedly connected to the connecting seat (605).

4. The sand filter equipment for oil mining according to claim 2 is characterized in that: The elastic drum rib (603) comprises a counterweight section (6032) in the middle, and the upper and lower ends of the counterweight section (6032) are fixedly connected to elastic sections (6031).

5. The sand filter equipment for oil mining according to claim 1, characterized in that: The rotary shock-absorbing pad (7) comprises a rigid base (701), and the lower end of the rigid base (701) is fixedly connected to an elastic connection seat (702), the inner wall of the elastic connection seat (702) is provided with a buffer cavity, and a plurality of elastic columns (703) distributed around the same distance are fixedly connected in the buffer cavity.

6. The sand filter equipment for oil mining according to claim 1, characterized in that: A plurality of symmetrically distributed paddles (12) are placed in the annular sand collecting groove (402), the side walls of both sides of the annular sand collecting groove (402) are connected to a slide groove (403), and the inner wall of the slide groove (403) is slidably connected to an annular rack (15) fixedly connected to the paddle (12), and a driving motor (13) electrically connected to the timing cleaning module is installed on the inner wall of the lower end of the slide groove (403), and the output end of the driving motor (13) is connected to a gear (14) meshing with the annular rack (15).

7. The sand filter equipment for oil mining according to claim 4, characterized in that: The inner wall of the filter cavity (401) is also fixedly inlaid with a magnetic ring (16), and the magnetic ring (16) is directly opposite the counterweight section (6032), and the side wall of the counterweight section (6032) is fixedly inlaid with a magnetic pad that magnetically repels the magnetic ring (16).

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