A sand remover for geothermal drilling and method of use

Abstract

The present application relates to the technical field of drilling mud purification, and discloses a sand remover for geothermal drilling, which comprises a sand removing tank, and further comprises an alternate sand removing unit, a sand discharging unit and a sand pushing unit; the alternate sand removing unit is arranged in the sand removing tank and is used for filtering sand particles in mud; the alternate sand removing unit comprises a separation component arranged in the sand removing tank and used for controlling the flow direction of mud; the separation component comprises a partition plate arranged on the inner wall of the bottom of the sand removing tank, an inclined plate arranged on the top of the partition plate and fixed to the side wall of the sand removing tank away from the partition plate, and an inverted U-shaped plate arranged on the inner wall of the bottom of the sand removing tank; the two filtering areas are alternately used to avoid the clogging of the filtering component, so that the filtering can be continuously and uninterruptedly performed, and the first filtering plate and the second filtering plate are mutually staggered to push the sand particles in the first filtering hole and the second filtering hole out.

Description

Technical Field

[0001] This invention relates to the technical field of drilling mud purification, but is not limited to it. In particular, it relates to a desander for geothermal drilling and its usage method. Background Technology

[0002] Geothermal drilling is used for drilling geothermal steam and geothermal water. Geothermal drilling first requires selecting a suitable drilling site on the surface, choosing an appropriate drilling method and drill bit based on geological and topographical conditions, and then conducting borehole exploration to obtain relevant information about underground geothermal resources. Drilling fluid is used in geothermal drilling projects. Drilling fluid is a general term for various circulating fluids that meet the needs of drilling work with multiple functions. Mud is a widely used drilling fluid. Drilling fluid is recycled during the drilling process. The returned drilling fluid is treated with desanding to remove particulate impurities, purifying the mud, and then it is circulated back to the well.

[0003] Patent application CN202010753094.5 discloses a desander for geothermal drilling. After the mud raw material enters the feed box, it first falls onto the filter screen. When the mud raw material falls onto the filter screen, the pure mud and small sand particles will fall through the filter screen and then enter the feed pipe, and then into the feed pipe, and finally into the desander body to further complete the desandering work. Finally, the pure mud is discharged from the discharge pipe and the sand particles are discharged from the drain pipe. The larger stones fall onto the filter screen and roll off the filter screen and fall into the inner cavity on the other side of the feed box, thus facilitating the screening of the larger stones.

[0004] The aforementioned patent has the following defects:

[0005] The aforementioned patent describes a method for filtering mud using only a single filter screen. However, when the screen becomes clogged, its filtration efficiency decreases, necessitating a halt to filtration. The screen must be cleaned before filtration can resume, a process that involves numerous steps and requires significant time and effort for cleaning, impacting both filtration and drilling progress.

[0006] The filter screen in the aforementioned patent is a single-layer design. However, impurities such as sand particles in the mud can easily get stuck in the filter screen's pores. The patent uses a spring located below the filter screen. When the mud rushes onto the filter screen, it directly impacts the screen and compresses the spring. At this time, the spring does not function as a spring but is continuously compressed. It only bounces up and vibrates the filter screen after the mud is filtered. However, during the filtration process, the sand particles that clog the filter screen cannot be cleared, thus affecting the filtration effect. Summary of the Invention

[0007] In view of the problem that existing technologies cannot clean the filter screen in a timely manner when it is clogged with sand particles, a desander for geothermal drilling and its usage method are proposed.

[0008] This application provides a desander for geothermal drilling, the purpose of which is to clean sand particles on the filter screen in a timely and more thorough manner, thereby ensuring the filtration performance of the filter screen.

[0009] The technical solution of the present invention is: a desander for geothermal drilling, comprising a desander box, and further comprising an alternating desander unit, a desander discharge unit and a desander pusher unit;

[0010] The alternating sand removal unit is installed inside the sand removal box and is used to filter sand particles in the mud.

[0011] The alternating sand removal unit includes: a partition component, installed inside the sand removal box, used to control the flow direction of the slurry; the partition component includes: a partition plate installed on the inner wall of the bottom of the sand removal box, an inclined plate installed on the top of the partition plate, with the side of the inclined plate away from the partition plate fixed to the side wall of the sand removal box, an inverted U-shaped plate installed on the inner wall of the bottom of the sand removal box, with the inverted U-shaped plate located between two partition plates, and two separate sand filtration zones formed between the inverted U-shaped plate and the two partition plates, and a sand-free slurry temporary storage zone formed between the partition plate, the inclined plate, and the inner wall of the sand removal box, a discharge pipe installed at the bottom of both sides of the sand removal box, and the discharge pipe connected to the sand-free slurry temporary storage zone, and two sand troughs opened at the bottom of the sand removal box, and the sand troughs connected to the sand filtration zone;

[0012] The sand-feeding component, located on the partition component, is used to guide the mud into the filtration zone;

[0013] The drive unit, located on the sand removal box, is used to drive the sand lowering unit to work, alternately guiding the mud to different filtration zones;

[0014] Filtering components: installed on the partition components, used to filter mud and sand particles in the filtration zone;

[0015] The sand removal unit, installed on the alternating sand removal unit, is used to remove sand particles from the filter components;

[0016] The sand pushing unit is installed on the sand discharge unit and is used to remove the sand particles that have not been discharged by the sand discharge unit.

[0017] Using the above technical solution, after the mud is transported to the sand removal box, the mud will flow into the filtration zone. Under the action of the filtration components, the sand particles in the mud will be filtered. The sand-free mud after filtration will flow into the sand-free mud storage zone and then be discharged from the discharge pipe. Meanwhile, the sand particles filtered in the filtration zone will be discharged to the outside from the lower sand trough.

[0018] Furthermore, the sand-feeding component includes: a first baffle and a second baffle disposed within the partition and the inverted U-shaped plate, with the first baffle located above the second baffle; two first through slots opened within the first baffle; two second through slots opened within the second baffle; a first sliding groove opened within the first baffle and the second baffle; a rotating rod disposed between the first baffle and the second baffle, with both ends of the rotating rod passing through the two first sliding grooves and sliding within the first sliding grooves; two second sliding grooves opened within the rotating rod; and a protruding rod disposed within the first sliding groove, the protruding rod slidingly engaging within the second sliding groove.

[0019] Using the above technical solution, when the drive component is working, it will drive the rotating rod to swing back and forth, and cause the second sliding groove to squeeze the protruding rod, thereby driving the first baffle and the second baffle to move back and forth. When the first baffle and the second baffle move back and forth, the first through groove and the second through groove on the first baffle and the second baffle are alternately connected to the filtration zone, so that the mud flows alternately to different filtration zones for filtration. When one filtration zone is filtering, the other filtration zone is discharging sand, and the two filtration zones alternate.

[0020] Furthermore, the driving component includes: a feed pipe disposed at the top of the sand removal box; a first rotating shaft disposed inside the sand removal box; multiple fan blades disposed outside the first rotating shaft, the fan blades being located inside the sand removal box and obliquely below the feed pipe; an incomplete gear disposed on the first rotating shaft extending to the outer end of the sand removal box; a second rotating shaft disposed inside the sand removal box, and the middle part of the second rotating shaft and the rotating rod being fixed together; a first gear disposed on the second rotating shaft extending to the outer end of the sand removal box; a guide plate disposed on the side wall of the sand removal box; a rectangular plate movably penetrating through the guide plate; two first toothed plates disposed on the top of the rectangular plate and meshing with the incomplete gear; and a second toothed plate disposed on the bottom of the rectangular plate and meshing with the first gear.

[0021] Using the above technical solution, the mud is transported to the desanding box through the feed pipe and falls onto the fan blades, causing the fan blades to rotate. When the fan blades rotate, they drive the first rotating shaft and the incomplete gear to rotate. When the incomplete gear rotates to mesh with one of the first toothed plates, it will drive that first toothed plate to move. When the incomplete gear rotates to mesh with the other first toothed plate, it will drive the other first toothed plate to move. The movements of the two first toothed plates are opposite, which in turn drives the rectangular plate and the second toothed plate to move back and forth up and down. When the second toothed plate moves back and forth up and down, it will drive the first gear and the second rotating shaft to rotate back and forth. When the second rotating shaft rotates, it will drive the rotating rod to swing back and forth.

[0022] Furthermore, the filter component includes a filter groove formed in the partition, a first filter plate disposed on one side of the partition, the height of the first filter plate being greater than the height of the filter groove and the first filter plate being disposed within the filter area, a plurality of first filter holes formed in the first filter plate, two guide rods disposed in the filter groove, two first positioning plates and a second positioning plate disposed on one side of the first filter plate, and the second positioning plate being located below the first positioning plate, with the guide rods movably passing through the corresponding first positioning plate and second positioning plate.

[0023] Using the above technical solution, when the mud flows into the filtration zone, the mud will pass through the first filter hole in the first filter plate and flow into the sand-free mud storage zone, while the sand particles in the mud will be filtered by the first filter plate, and the filtered sand particles will be retained in the sand particle filtration zone.

[0024] Furthermore, the sand removal unit includes a shaking component, which is disposed on the filter component and is used to control the shaking and vibration of the first filter plate to remove sand;

[0025] The shaking component includes: a first elastic element sleeved on the outside of the guide rod, with both ends of the first elastic element abutting against the inner wall of the top of the filter tank and the first positioning plate respectively; a rotating shaft that rotates in the ear plates on both sides of the inverted U-shaped plate; an eccentric wheel set at one end of the rotating shaft, the eccentric wheel being located directly below the first filter plate; and a second gear set at the other end of the rotating shaft, with the rotating shaft and the second gear connected by a one-way bearing.

[0026] An assist component, located on the vibrating component, is used to drive the vibrating component to work.

[0027] Using the above technical solution, when the eccentric wheel rotates, it will squeeze the first filter plate and drive the first filter plate to move upward. When the first filter plate moves upward, it will drive the first positioning plate and the second positioning plate to move upward. When the first positioning plate moves upward, it will squeeze the first elastic element. When the eccentric wheel stops squeezing the first filter plate, the first filter plate will move downward under the rebound force of the first elastic element. When the eccentric wheel squeezes the first filter plate again, it will drive the first filter plate to move upward again. This process is repeated, causing the first filter plate to shake up and down, which makes it easier to clean the sand particles stuck in the first filter plate.

[0028] Furthermore, the assisting component includes: two horizontal plates fixed on the inner walls of the two ear plates of the inverted U-shaped plate; four arc-shaped extrusion plates disposed on the second baffle; a third sliding groove opened in the horizontal plate for the arc-shaped extrusion plates to slide; a fourth sliding groove opened in the horizontal plate and connected to the third sliding groove; a fifth sliding groove opened on the side walls of the fourth sliding groove; a drive tooth plate slidably fitted in the fourth sliding groove; an arc-shaped pressure plate disposed on one side of the drive tooth plate; guide plates disposed on both sides of the drive tooth plate, the guide plates slidably fitted in the fifth sliding groove; and a second elastic member disposed in the fourth sliding groove, with both ends of the second elastic member fixed to the inner wall of the fourth sliding groove and the drive tooth plate, respectively.

[0029] Using the above technical solution, when the second baffle moves, it will drive the arc-shaped extrusion plate to move in the third slide groove. When the arc-shaped extrusion plate moves to extrude the arc-shaped pressure plate, the arc-shaped pressure plate will be squeezed and drive the drive tooth plate to move into the fourth slide groove. At this time, the one-way bearing between the second gear and the rotating shaft is locked. When the drive tooth plate moves, it will drive the rotating shaft to rotate through the second gear, which in turn will drive the eccentric wheel to rotate.

[0030] Furthermore, the sand pushing unit includes: a misaligned sand removal component, which is disposed on the shaking component and is used to remove sand particles that cannot be removed from the first filter plate due to vibration.

[0031] The misaligned sand removal component includes: a second filter plate disposed on one side of the first filter plate; two guide grooves opened in the first filter plate; two square blocks disposed on one side of the second filter plate, with the two square blocks slidingly engaged in the corresponding guide grooves; a cylindrical rod disposed in the square blocks; two guide blocks disposed on the first filter plate, with the cylindrical rods movably passing through the guide blocks; a third elastic member sleeved on the cylindrical rods, with both ends of the third elastic member abutting against the square blocks and the guide blocks respectively; and two blocking blocks disposed on the guide rods, with the blocking blocks located above the cylindrical rods.

[0032] Misalignment auxiliary component; installed on the misalignment sand removal component to help remove sand particles more easily when the second filter plate and the first filter plate are misaligned.

[0033] Using the above technical solution, when the first filter plate shakes up and down, it will drive the second filter plate to move accordingly. When the second filter plate moves, when the cylindrical rod inside the square block encounters the blocking block while moving upward, the second filter plate will not move upward anymore. At this time, the cylindrical rod drives the square block to compress the third elastic element, while the first filter plate will continue to move upward. The square block will slide downward in the guide groove, that is, the first filter plate and the second filter plate will be misaligned with each other, thereby pushing out the sand particles in the first filter hole and the second filter hole.

[0034] Furthermore, the misalignment auxiliary component includes: two L-shaped limiting plates disposed on one side of the first filter plate, and the second filter plate is slidably fitted within the L-shaped limiting plates; a plurality of second filter holes opened within the second filter plate; and the bottom groove wall of the second filter hole is inclined, and the vertical section of the inclined surface has a downward trend from top to bottom and from the first filter plate to the second filter plate.

[0035] With the above technical solution, since the bottom groove wall of the second filter hole is set with an inclined surface, and the vertical section of the inclined surface has a downward trend from top to bottom and from the first filter plate to the second filter plate, that is, when the second filter plate and the first filter plate are misaligned, the second filter plate is pushed.

[0036] This application also provides a method for using a desander for geothermal drilling, including the following steps.

[0037] The mud is fed into the sand removal box through the feed pipe and falls onto the fan blades, which in turn drive the fan blades, the first rotating shaft and the incomplete gear to rotate. When the incomplete gear rotates, it drives the two first tooth plates to move in opposite directions, which in turn drives the second tooth plate to move up and down reciprocally. When the second tooth plate moves up and down reciprocally, it drives the first gear and the second rotating shaft to rotate back and forth, which in turn drives the rotating rod to swing back and forth.

[0038] When the rotating rod swings back and forth, it drives the first baffle and the second baffle to move back and forth. When the first baffle and the second baffle move back and forth, the first channel and the second channel alternately communicate with the filter area, so that when one filter area is filtering, the other filter area is discharging sand, and the two filter areas alternate.

[0039] Using the above technical solution, when the mud is transported to the sand removal box, it drives the fan blades, the first rotating shaft and the incomplete gear to rotate, which in turn drives the rotating rod, the first baffle and the second baffle to move back and forth. No external power is required to drive it, saving energy. Moreover, the filtration zone filters alternately, avoiding clogging of the filtration components, so that filtration can be carried out continuously and without interruption.

[0040] Furthermore, when the arc-shaped pressure plate is squeezed by the arc-shaped extrusion plate, it will drive the drive tooth plate to move into the fourth slide groove. During the process of the drive tooth plate moving into the fourth slide groove, the one-way bearing between the second gear and the rotating shaft is locked. When the drive tooth plate moves, it will drive the second gear, the rotating shaft and the eccentric wheel to rotate.

[0041] When the eccentric wheel rotates, it will squeeze the first filter plate and cause the first filter plate to move up. The first filter plate moving up will cause the first positioning plate to move up and cause the first positioning plate to squeeze the first elastic element. When the eccentric wheel stops squeezing the first filter plate, the first filter plate will move down under the rebound force of the first elastic element. When the eccentric wheel rotates back and forth, it will cause the first filter plate to shake up and down.

[0042] When the first filter plate vibrates up and down, it causes the second filter plate to move accordingly. When the cylindrical rod inside the square block moves upward and encounters the blocking block, the second filter plate will stop moving upward, while the first filter plate will continue to move upward. That is, the first and second filter plates will be misaligned, thereby pushing out the sand particles in the first and second filter holes.

[0043] By adopting the above technical solution, the movement of the drive tooth plate drives the second gear, the rotating shaft and the eccentric wheel to rotate, thereby causing the eccentric wheel to drive the first filter plate to shake up and down. When the first filter plate shakes up and down, it will drive the second filter plate to move. During the movement of the second filter plate, when the cylindrical rod in the square block encounters the obstruction of the blocking block, the first filter plate and the second filter plate will be misaligned, which makes it easier to clean the sand particles.

[0044] The beneficial effects of this invention are:

[0045] By converting the potential energy of the falling mud into kinetic energy and driving the rotating rod to swing back and forth, the rotating rod swings back and forth, causing the first and second baffles to move back and forth. This allows the first and second channels on the first and second baffles to alternately communicate with the filtration zone, thus allowing the mud to flow alternately into different filtration zones for filtration. While one filtration zone is filtering, the other filtration zone is discharging sand. The two filtration zones alternate, preventing the filtration components from becoming clogged and ensuring that filtration can be carried out continuously and without interruption.

[0046] When the first filter plate moves upward, the first positioning plate presses against the first elastic element. When the eccentric wheel stops pressing against the first filter plate, the first filter plate moves downward under the rebound force of the first elastic element. When the eccentric wheel presses against the first filter plate again, it will move the first filter plate upward again. This process repeats, causing the first filter plate to shake up and down, which makes it easier to clean the sand particles stuck in the first filter plate. When the rebound force of the first elastic element moves the first filter plate downward, the impact between the second positioning plate and the inner wall at the bottom of the filter tank will also cause the first filter plate to vibrate, which is even more conducive to cleaning the sand particles stuck in the first filter plate.

[0047] During the movement of the moving toothed plate into the fourth slide groove, the one-way bearing between the second gear and the rotating shaft is locked. When the driving toothed plate moves, it will drive the rotating shaft to rotate through the second gear. When the arc-shaped extrusion plate moves to the point where it no longer extrudes the arc-shaped pressure plate, the driving toothed plate will move in the opposite direction under the rebound force of the second elastic element. At this time, the one-way bearing between the second gear and the rotating shaft is not locked. The movement of the driving toothed plate will drive the second gear to rotate without driving the rotating shaft to rotate, thus facilitating the driving toothed plate to move back to its original position, so that the arc-shaped extrusion plate will extrude the arc-shaped pressure plate again when it passes by next time.

[0048] As the first filter plate vibrates up and down, it will cause the second filter plate to move accordingly. When the cylindrical rod moves upward and encounters the blocking block, the second filter plate will stop moving upward, while the first filter plate will continue to move upward. That is, the first and second filter plates will be misaligned, thereby pushing out the sand particles in the first and second filter holes.

[0049] Because the bottom wall of the second filter hole is set with an inclined surface, and the vertical section of the inclined surface has a downward trend from top to bottom and from the first filter plate to the second filter plate, that is, when the second filter plate and the first filter plate are misaligned, the second filter plate is pushed. Attached Figure Description

[0050] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0051] Figure 2 This is a schematic diagram of the internal structure of the sand removal box of the present invention;

[0052] Figure 3 This is a cross-sectional view of the interior structure of the sand removal box of the present invention;

[0053] Figure 4 This is a frontal cross-sectional view of a partial structure of the present invention;

[0054] Figure 5 This is a partial structural diagram of the present invention;

[0055] Figure 6 This is a schematic diagram of the sand removal unit of the present invention;

[0056] Figure 7 For the present invention Figure 6 Cross-sectional view;

[0057] Figure 8 For the present invention Figure 5 Enlarged view of the structure at point A in the middle;

[0058] Figure 9 This is a schematic diagram of the structure of the assist component of the present invention;

[0059] Figure 10 For the present invention Figure 9 Enlarged view of the structure at point B in the middle;

[0060] Figure 11 For the present invention Figure 7 Enlarged view of the structure at point C;

[0061] Figure 12 This is a cross-sectional schematic diagram of the second filter hole of the present invention.

[0062] In the picture:

[0063] 1. Sand removal box; 2. Alternating sand removal unit; 3. Sand discharge unit; 4. Sand pushing unit; 21. Separating component; 211. Baffle plate; 212. Inclined plate; 213. Inverted U-shaped plate; 214. Filtration zone; 215. Sand-free slurry temporary storage zone; 216. Discharge pipe; 217. Sand discharge trough; 22. Sand discharge component; 221. First baffle; 222. Second baffle; 223. First through channel; 224. Second through channel; 225. 226. First slide groove; 227. Rotating rod; 228. Second slide groove; 229. Protruding rod; 230. Drive component; 230. Feed pipe; 231. First rotating shaft; 232. Fan blade; 233. Incomplete gear; 234. Second rotating shaft; 235. First gear; 236. Guide plate; 237. Rectangular plate; 238. First toothed plate; 239. Second toothed plate; 24. Filter component; 241. Filter tank; 242. 1. Filter plate; 243. First filter hole; 244. Guide rod; 245. First positioning plate; 246. Second positioning plate; 3. Sand discharge unit; 31. Vibrating component; 311. First elastic element; 312. Rotating shaft; 313. Eccentric wheel; 314. Second gear; 32. Assisting component; 321. Horizontal plate; 322. Arc-shaped extrusion plate; 323. Third slide groove; 324. Fourth slide groove; 325. Fifth slide groove 326. Drive toothed plate; 327. Arc-shaped pressure plate; 328. Guide plate; 329. Second elastic element; 4. Sand pushing unit; 41. Misaligned sand removal component; 411. Second filter plate; 412. Guide groove; 413. Square block; 414. Cylindrical rod; 415. Guide block; 416. Third elastic element; 417. Blocking block; 42. Misaligned auxiliary component; 421. L-shaped limiting plate; 422. Second filter hole. Detailed Implementation

[0064] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0065] Example 1, referring to Figure 1-6 The first embodiment of the present invention provides a desander for geothermal drilling, including a desander box 1, and further including an alternating desander unit, a desander discharge unit, and a desander pusher unit; the desander discharge unit is installed on the alternating desander unit, and the desander discharge unit can be a vibration motor, used to drive the filter screen to vibrate and remove the sand particles stuck in the filter screen; the desander pusher unit is installed on the desander discharge unit, and the desander pusher unit can be a telescopic device that drives a scraper to move, used to scrape off the sand particles stuck in the filter screen.

[0066] Reference Figure 2-3An alternating sand removal unit is installed inside the sand removal box 1 to filter sand particles in the mud. The alternating sand removal unit includes a partition component 21, installed inside the sand removal box 1, used to control the flow direction of the mud. The partition component 21 includes: a partition plate 211 fixed to the inner bottom wall of the sand removal box 1; an inclined plate 212 fixed to the top of the partition plate 211, with the side of the inclined plate 212 away from the partition plate 211 fixed to the side wall of the sand removal box 1; and an inverted U-shaped plate 213 fixed to the inner bottom wall of the sand removal box 1. 3 is located between two partitions 211, and the inverted U-shaped plate 213 and the two partitions 211 form two separate sand filtration zones 214. The partitions 211, inclined plate 212 and the inner wall of the sand removal box 1 form a sand-free slurry storage zone 215. The discharge pipes 216 are installed at the bottom of both sides of the sand removal box 1 and are connected to the sand-free slurry storage zone 215. Two sand troughs 217 are opened at the bottom of the sand removal box 1 and are connected to the sand filtration zone 214.

[0067] Specifically, since two separate sand filtration zones 214 are formed between the inverted U-shaped plate 213 and the two partitions 211, and a sand-free slurry temporary storage zone 215 is formed between the partitions 211, the inclined plate 212, and the inner wall of the sand removal box 1, the slurry can be filtered in different filtration zones 214. The filtered sand particles will be retained in the filtration zone 214 and discharged from the lower sand trough 217, while the sand-free slurry will flow into the sand-free slurry temporary storage zone 215 and then be discharged from the discharge pipe 216.

[0068] Reference Figure 2-3 The sand-feeding component 22 is disposed on the partition component 21 and is used to guide the mud into the filtration zone 214. The sand-feeding component 22 includes: a first baffle 221 and a second baffle 222 that are movably inserted through the partition 211 and the inverted U-shaped plate 213, with the first baffle 221 located above the second baffle 222; two first through slots 223 opened in the first baffle 221; two second through slots 224 opened in the second baffle 222; a first sliding groove 225 opened in the first baffle 221 and the second baffle 222; a rotating rod 226 disposed between the first baffle 221 and the second baffle 222, with both ends of the rotating rod 226 passing through the two first sliding grooves 225 and sliding within the first sliding grooves 225; two second sliding grooves 227 opened in the rotating rod 226; and a protruding rod 228 fixed in the first sliding groove 225, with the protruding rod 228 slidably engaged within the second sliding groove 227.

[0069] Specifically, when the rotating rod 226 reciprocates, the second sliding groove 227 presses against the protruding rod 228, thereby driving the first baffle 221 and the second baffle 222 to reciprocate. During this reciprocating movement, the first through groove 223 and the second through groove 224 on the first baffle 221 and the second baffle 222 alternately communicate with the filter area 214. It should be noted that when the first through groove 223 moves into the filter area 214, the distance between the other first through groove 223 and its adjacent filter area 214 is denoted as L1. Figure 4 As shown, L1 is equal to the width of the first channel 223. When the second channel 224 moves into the filter area 214, the distance between the other second channel 224 and its adjacent filter area 214 is denoted as L2. Figure 4 As shown, L2 is equal to the width of the second channel 224, so that when the first channel 223 of the first baffle 221 is located in the filtration zone 214, the second channel 224 of the second baffle 222 is located in the sand-free slurry storage zone 215, so that the second baffle 222 seals the bottom of the filtration zone 214. Due to the distance setting of L1 and L2, when the first channel 223 is located in the filtration zone 214, the second channel 224 is not located in the filtration zone 214, that is, the slurry will flow into the filtration zone 214 for filtration. When the second channel 224 is located in the filtration zone 214, the first channel 223 is not located in the filtration zone 214, that is, the filtered sand particles will be discharged from the second channel 224.

[0070] Reference Figure 1-3 The drive component 23, installed on the sand removal box 1, is used to drive the sand-feeding component 22 to work, alternately guiding the slurry into different filtration zones 214. The drive component 23 includes: a feed pipe 230 connected to the top of the sand removal box 1; a first rotating shaft 231 that rotates within the sand removal box 1; multiple fan blades 232 fixed outside the first rotating shaft 231, the fan blades 232 being located inside the sand removal box 1 and obliquely below the feed pipe 230; and an incomplete gear 233 fixed to the outer end of the first rotating shaft 231 extending to the outer end of the sand removal box 1. A second rotating shaft 234 is movable inside the sand removal box 1, and the middle part of the second rotating shaft 234 and the rotating rod 226 are fixed together. A first gear 235 is fixed to the second rotating shaft 234 extending to the outer end of the sand removal box 1. A guide plate 236 is fixed to the side wall of the sand removal box 1. A rectangular plate 237 is movable through the guide plate 236. Two first toothed plates 238 are fixed to the top of the rectangular plate 237 and mesh with the incomplete gear 233. A second toothed plate 239 is fixed to the bottom of the rectangular plate 237 and meshes with the first gear 235.

[0071] Specifically, the mud falls onto the fan blade 232, causing the fan blade 232, the first rotating shaft 231 to rotate, and the incomplete gear 233 to rotate. When the incomplete gear 233 rotates to mesh with one of the first toothed plates 238, the rotation of the incomplete gear 233 will cause the first toothed plate 238 to move. When the incomplete gear 233 rotates to mesh with the other first toothed plate 238, the rotation of the incomplete gear 233 will cause the other first toothed plate 238 to move. The movements of the two first toothed plates 238 are opposite, thereby causing the rectangular plate 237 and the second toothed plate 239 to move back and forth up and down. When the second toothed plate 239 moves back and forth up and down, it will cause the first gear 235 and the second rotating shaft 234 to rotate back and forth, thereby causing the rotating rod 226 to swing back and forth.

[0072] Reference Figure 4-6 Filter component 24: Installed on the partition component 21, used to filter mud and sand particles in the filter zone 214; the filter component 24 includes a filter groove 241 opened in the partition 211, a first filter plate 242 disposed on one side of the partition 211, the height of the first filter plate 242 being greater than the height of the filter groove 241 and the first filter plate 242 being disposed in the filter zone 214, a plurality of first filter holes 243 opened in the first filter plate 242, two guide rods 244 fixed in the filter groove 241, two first positioning plates 245 and second positioning plates 246 fixed on one side of the first filter plate 242, the second positioning plate 246 being located below the first positioning plate 245, and the guide rods 244 movably passing through the corresponding first positioning plate 245 and second positioning plate 246.

[0073] Specifically, when the mud flows into the filtration zone 214, the mud will pass through the first filter hole 243 in the first filter plate 242 and flow into the sand-free mud storage zone 215. The sand particles in the mud will be filtered by the first filter plate 242, and the filtered sand particles will be retained in the sand particle filtration zone 214.

[0074] During operation, the mud is fed into the desanding box 1 through the feed pipe 230. The mud falls onto the fan blade 232, causing the fan blade 232, the first rotating shaft 231, and the incomplete gear 233 to rotate. When the incomplete gear 233 rotates, it drives the rectangular plate 237 and the second toothed plate 239 to move back and forth through the first toothed plate 238. This, in turn, drives the first gear 235 and the second rotating shaft 234 to rotate back and forth, thereby driving the rotating rod 226 to swing back and forth. When the rotating rod 226 swings back and forth, it drives the first baffle 221 and the second baffle 235 to rotate back and forth. The second baffle 222 moves back and forth, and when the first baffle 221 and the second baffle 222 move back and forth, the first through groove 223 and the second through groove 224 on the first baffle 221 and the second baffle 222 are alternately connected to the filter zone 214, so that the mud flows alternately to different filter zones 214 for filtration. When one filter zone 214 is filtering, the other filter zone 214 is discharging sand. The two filter zones 214 alternate to avoid clogging of the filter component 24, so that filtration can be carried out continuously and without interruption.

[0075] Example 2, refer to Figure 1-10 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the sand discharge unit includes a shaking component 31, which is disposed on the filter component 24 and is used to control the first filter plate 242 to shake and vibrate to discharge sand.

[0076] The shaking component 31 includes: a first elastic member 311 sleeved on the outside of the guide rod 244, with both ends of the first elastic member 311 abutting against the top inner wall of the filter tank 241 and the first positioning plate 245 respectively; two rotating shafts 312 sealed and rotatable in the ear plates on both sides of the inverted U-shaped plate 213; an eccentric wheel 313 fixed at one end of the rotating shaft 312, the eccentric wheel 313 being located directly below the first filter plate 242; and a second gear 314 disposed at the other end of the rotating shaft 312, with the rotating shaft 312 and the second gear 314 connected by a one-way bearing.

[0077] The assist component 32 is disposed on the vibration component 31 and is used to drive the vibration component 31 to work.

[0078] Specifically, when the eccentric wheel 313 rotates, it will drive the first filter plate 242 to move upward, thereby driving the first positioning plate 245 to move upward and causing the first positioning plate 245 to press against the first elastic member 311. When the eccentric wheel 313 stops pressing against the first filter plate 242, the first filter plate 242 will move downward under the rebound force of the first elastic member 311. When the eccentric wheel 313 presses against the first filter plate 242 again, it will drive the first filter plate 242 to move upward again. This process is repeated, causing the first filter plate 242 to shake up and down, which makes it easier to clean the sand particles stuck in the first filter plate 242.

[0079] Reference Figure 8-10The assist component 32 includes: two horizontal plates 321 fixed on the inner walls of the two ear plates in the inverted U-shaped plate 213; four arc-shaped extrusion plates 322 fixed on the second baffle 222; a third slide groove 323 opened in the horizontal plate 321 for the arc-shaped extrusion plates 322 to slide; a fourth slide groove 324 opened in the horizontal plate 321 and connected to the third slide groove 323; a fifth slide groove 325 opened on the two side walls of the fourth slide groove 324; a drive tooth plate 326 slidably fitted in the fourth slide groove 324; an arc-shaped pressure plate 327 fixed on one side of the drive tooth plate 326; guide plates 328 fixed on both sides of the drive tooth plate 326, the guide plates 328 slidably fitted in the fifth slide groove 325; and a second elastic member 329 disposed in the fourth slide groove 324, with both ends of the second elastic member 329 fixed to the inner wall of the fourth slide groove 324 and the drive tooth plate 326, respectively.

[0080] Specifically, it should be noted that the second elastic element 329 can use a spring or other device, and in its normal state, the arc-shaped pressure plate 327 is located in the third slide groove 323. When the arc-shaped extrusion plate 322 moves to extrude the arc-shaped pressure plate 327, the arc-shaped pressure plate 327 will be extruded and drive the drive tooth plate 326 to move into the fourth slide groove 324. At this time, the one-way bearing between the second gear 314 and the rotating shaft 312 is locked. When the drive tooth plate 326 moves, it will drive the rotating shaft 312 to rotate through the second gear 314, thereby causing the rotating shaft 312 to drive the eccentric wheel 313 to rotate.

[0081] During use, the second baffle 222 moves, causing the arc-shaped extrusion plate 322 to move within the third slide groove 323. When the arc-shaped extrusion plate 322 moves to extrude the arc-shaped pressure plate 327, the pressure on the arc-shaped pressure plate 327 causes the drive gear plate 326 to move into the fourth slide groove 324, compressing the second elastic element 329. During the movement of the drive gear plate 326 into the fourth slide groove 324, the one-way bearing between the second gear 314 and the rotating shaft 312 is locked. When the drive gear plate 326 moves, it will pass through the second gear 314... 14 drives the rotating shaft 312 to rotate. When the arc-shaped extrusion plate 322 moves to the point where it no longer extrudes the arc-shaped pressure plate 327, the second elastic element 329, under its rebound force, drives the drive gear plate 326 to move in the opposite direction. At this time, the one-way bearing between the second gear 314 and the rotating shaft 312 is not locked. The movement of the drive gear plate 326 will drive the second gear 314 to rotate without driving the rotation of the rotating shaft 312, thus facilitating the drive gear plate 326 to move back to its original position. This ensures that the arc-shaped extrusion plate 322 will extrude the arc-shaped pressure plate 327 again when it passes by next time. When the rotating shaft 312 rotates, it will... When the eccentric wheel 313 rotates, it presses against the first filter plate 242 and causes it to move upward. This upward movement of the first filter plate 242 causes the first positioning plate 245 and the second positioning plate 246 to move upward. The upward movement of the first positioning plate 245 presses against the first elastic element 311. The first elastic element 311 can be a spring or similar device. In its normal state, the bottom of the second positioning plate 246 and the bottom inner wall of the filter groove 241 are in contact. When the eccentric wheel 313 stops pressing against the first filter plate 242, the first elastic element 311... The rebound force of the first elastic element 311 causes the first filter plate 242 to move downward, while the eccentric wheel 313 squeezes the first filter plate 242 again, causing the first filter plate 242 to move upward. This process is repeated, causing the first filter plate 242 to shake up and down, which makes it easier to clean the sand particles stuck in the first filter plate 242. When the rebound force of the first elastic element 311 causes the first filter plate 242 to move downward, the impact between the second positioning plate 246 and the inner wall at the bottom of the filter tank 241 will also cause the first filter plate 242 to vibrate, which is more conducive to cleaning the sand particles stuck in the first filter plate 242.

[0082] The remaining structure is the same as that in Example 1.

[0083] Example 3, referring to Figure 1-12 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that the sand pushing unit includes: a misaligned sand removal component 41, which is installed on the shaking component 31 and is used to remove the sand particles that cannot be removed due to vibration in the first filter plate 242 again.

[0084] The misaligned sand removal component 41 includes: a second filter plate 411 disposed on one side of the first filter plate 242; two guide grooves 412 opened in the first filter plate 242; two square blocks 413 fixed on one side of the second filter plate 411, and the two square blocks 413 are respectively slidably engaged in the corresponding guide grooves 412; a cylindrical rod 414 fixed in the square block 413; two guide blocks 415 fixed on the first filter plate 242, the cylindrical rod 414 passing through the guide block 415 and sliding in the guide block 415; a third elastic member 416 sleeved on the cylindrical rod 414, and the two ends of the third elastic member 416 abutting against the square block 413 and the guide block 415 respectively; and two blocking blocks 417 fixed on the guide rod 244, the blocking blocks 417 being located above the cylindrical rod 414.

[0085] Misalignment auxiliary component 42; installed on misalignment sand removal component 41, used to help remove sand particles more easily when the second filter plate 411 and the first filter plate 242 are misaligned.

[0086] Specifically, the third elastic element 416 can be a spring or similar device. When the first filter plate 242 shakes up and down, it will drive the second filter plate 411 to move accordingly. When the second filter plate 411 moves, when the cylindrical rod 414 in the square block 413 encounters the blocking block 417 while moving upward, the second filter plate 411 will not move upward anymore. At this time, the cylindrical rod 414 drives the square block 413 to compress the third elastic element 416, while the first filter plate 242 will continue to move upward. The square block 413 will slide downward in the guide groove 412, that is, the first filter plate 242 and the second filter plate 411 will be misaligned with each other, thereby pushing out the sand particles in the first filter hole 243 and the second filter hole 422.

[0087] Reference Figure 11-12 The misalignment auxiliary component 42 includes: two L-shaped limiting plates 421 fixed on one side of the first filter plate 242, and the second filter plate 411 slidably fitted in the L-shaped limiting plates 421; a plurality of second filter holes 422 opened in the second filter plate 411; the bottom groove wall of the second filter hole 422 is set with an inclined surface, and the vertical section of the inclined surface has a downward trend from top to bottom and from the first filter plate 242 to the second filter plate 411.

[0088] Specifically, since the bottom groove wall of the second filter hole 422 is set with an inclined surface, and the vertical section of the inclined surface has a downward trend from top to bottom and from the first filter plate 242 to the second filter plate 411, that is, when the second filter plate 411 and the first filter plate 242 are misaligned, the second filter plate 411 is pushed.

[0089] During use, when the first filter plate 242 vibrates up and down, it will cause the second filter plate 411 to move accordingly. When the second filter plate 411 moves, when the cylindrical rod 414 inside the square block 413 encounters the blocking block 417 while moving upward, the second filter plate 411 will stop moving upward. At this time, the cylindrical rod 414 will cause the square block 413 to compress the third elastic element 416, while the first filter plate 242 will continue to move upward. The square block 413 will slide downward in the guide groove 412, that is, the first filter plate 242 and the second filter plate 411 will be misaligned with each other, thereby pushing out the sand particles in the first filter hole 243 and the second filter hole 422. Since the bottom groove wall of the second filter hole 422 is set with an inclined surface, and the vertical section of the inclined surface has a downward trend from top to bottom and from the first filter plate 242 to the second filter plate 411, that is, when the second filter plate 411 and the first filter plate 242 are misaligned, the pushing of the second filter plate 411 is more conducive to pushing out the sand particles.

[0090] The remaining structure is the same as that in Example 2.

[0091] Example 4, refer to Figure 1-12 The fourth embodiment of the present invention provides a method for using a desander for geothermal drilling, comprising the following steps:

[0092] S1: The mud is conveyed to the desanding box 1 through the feed pipe 230. The mud falls onto the fan blade 232 and drives the fan blade 232 to rotate. When the fan blade 232 rotates, it drives the first rotating shaft 231 to rotate, which in turn drives the incomplete gear 233 to rotate. When the incomplete gear 233 rotates to mesh with one of the first tooth plates 238, the rotation of the incomplete gear 233 will drive the first tooth plate 238 to move. When the incomplete gear 233 rotates to mesh with the other first tooth plate 238, the rotation of the incomplete gear 233 will... It drives another first toothed plate 238 to move, and the two first toothed plates 238 move in opposite directions. When one first toothed plate 238 moves upward, the other toothed plate will move downward, thereby driving the rectangular plate 237 and the second toothed plate 239 to move back and forth up and down. When the second toothed plate 239 moves back and forth up and down, it will drive the first gear 235 to rotate back and forth. When the first gear 235 rotates back and forth, it will drive the second rotating shaft 234 to rotate. When the second rotating shaft 234 rotates, it will drive the rotating rod 226 to swing back and forth.

[0093] S2: When the rotating rod 226 swings back and forth, the second sliding groove 227 presses against the protruding rod 228, thereby driving the first baffle 221 and the second baffle 222 to move. When the first through groove 223 on the first baffle 221 moves into the filtration zone 214, the second through groove 224 on the second baffle 222 is not in the filtration zone 214. At this time, the mud will flow through the first through groove into the corresponding filtration zone 214 for filtration. At the same time, the other first through groove 223 on the first baffle 221 is not located in the filtration zone 214. The second through groove 224 on the second baffle 222 is located within the filter zone 214, so that the sand particles after the last filtration will be discharged to the outside through the filter zone 214 and the lower sand groove 217. When the first baffle 221 and the second baffle 222 move back and forth, the first through groove 223 and the second through groove 224 on the first baffle 221 and the second baffle 222 are alternately connected to the filter zone 214, so that when one filter zone 214 is filtering, the other filter zone 214 is discharging sand, and the two alternate.

[0094] S3: When the second baffle 222 moves, it will drive the arc-shaped extrusion plate 322 to move within the third slide groove 323. When the arc-shaped extrusion plate 322 moves to extrude the arc-shaped pressure plate 327, the arc-shaped pressure plate 327 will be compressed, which will drive the drive tooth plate 326 to move into the fourth slide groove 324, and cause the drive tooth plate 326 to compress the second elastic element 329. During the process of the drive tooth plate 326 moving into the fourth slide groove 324, the one-way bearing between the second gear 314 and the rotating shaft 312 is in a locked state. When the drive tooth plate 326 moves, it will... The second gear 314 drives the rotating shaft 312 to rotate. When the arc-shaped extrusion plate 322 moves to the point where it no longer extrudes the arc-shaped pressure plate 327, the second elastic element 329 rebounds and drives the drive tooth plate 326 to move in the opposite direction. At this time, the one-way bearing between the second gear 314 and the rotating shaft 312 is not locked. The movement of the drive tooth plate 326 will drive the second gear 314 to rotate without driving the rotating shaft 312 to rotate, thus making it easier for the drive tooth plate 326 to move back to its original position, so that the arc-shaped extrusion plate 322 will extrude the arc-shaped pressure plate 327 again when it passes by next time.

[0095] S4: When the rotating shaft 312 rotates, it drives the eccentric wheel 313 to rotate. When the eccentric wheel 313 rotates, it squeezes the first filter plate 242 and drives the first filter plate 242 to move upward. When the first filter plate 242 moves upward, it drives the first positioning plate 245 and the second positioning plate 246 to move upward. When the first positioning plate 245 moves upward, it squeezes the first elastic element 311. When the eccentric wheel 313 stops squeezing the first filter plate 242, the first filter plate 242 moves downward under the rebound force of the first elastic element 311. When 313 squeezes the first filter plate 242 again, it will cause the first filter plate 242 to move upward. This process is repeated, causing the first filter plate 242 to shake up and down, which makes it easier to clean the sand particles stuck in the first filter plate 242. When the rebound force of the first elastic element 311 causes the first filter plate 242 to move downward, when the second positioning plate 246 and the inner wall of the bottom of the filter tank 241 collide, it will also cause the first filter plate 242 to vibrate, which is more conducive to cleaning the sand particles stuck in the first filter plate 242.

[0096] S5: When the first filter plate 242 shakes up and down, it will drive the second filter plate 411 to move accordingly. When the second filter plate 411 moves, when the cylindrical rod 414 in the square block 413 encounters the blocking block 417 while moving upward, the second filter plate 411 will not move upward anymore. At this time, the cylindrical rod 414 drives the square block 413 to compress the third elastic element 416, while the first filter plate 242 will continue to move upward. The square block 413 will slide downward in the guide groove 412, that is, the first filter plate 242 and the second filter plate 411 will be misaligned with each other, thereby pushing out the sand particles in the first filter hole 243 and the second filter hole 422. Since the bottom groove wall of the second filter hole 422 is set with an inclined surface, and the vertical section of the inclined surface has a downward trend from top to bottom and from the first filter plate 242 to the second filter plate 411, that is, when the second filter plate 411 and the first filter plate 242 are misaligned, the pushing of the second filter plate 411 is more conducive to pushing out the sand particles.

Claims

1. A desander for geothermal drilling, comprising a desander box (1), characterized in that: It also includes an alternating sand removal unit, a sand discharge unit, and a sand pushing unit; The alternating sand removal unit is installed inside the sand removal box (1) and is used to filter sand particles in the mud. The alternating desanding unit includes: a partition (21) disposed within the desanding box (1) for controlling the flow direction of the slurry; the partition (21) includes: a partition (211) disposed on the inner wall of the bottom of the desanding box (1), an inclined plate (212) disposed on the top of the partition (211), wherein the side of the inclined plate (212) away from the partition (211) is fixed to the side wall of the desanding box (1), and an inverted U-shaped plate (213) disposed on the inner wall of the bottom of the desanding box (1), wherein the inverted U-shaped plate (213) is located between the two partitions (211), and Two separate sand filtration zones (214) are formed between the inverted U-shaped plate (213) and the two partitions (211). A sand-free slurry storage zone (215) is formed between the partitions (211), the inclined plate (212), and the inner wall of the sand removal box (1). A discharge pipe (216) is set at the bottom of both sides of the sand removal box (1), and the discharge pipe (216) is connected to the sand-free slurry storage zone (215). Two sand troughs (217) are opened at the bottom of the sand removal box (1), and the sand troughs (217) are connected to the sand filtration zone (214). The sand-feeding component (22) is installed on the partition component (21) and is used to guide the mud into the filtration zone (214); The drive unit (23) is installed on the sand removal box (1) and is used to drive the sand lowering unit (22) to work, and to alternately guide the mud to different filtration zones (214); Filtering component (24): disposed on the partition component (21), used to filter mud and sand particles in the filtering zone (214); The sand removal unit is installed on the alternating sand removal unit and is used to remove sand particles from the filter element (24); The sand pushing unit is installed on the sand discharging unit and is used to remove the sand particles that are not discharged by the sand discharging unit for a second time. The sand-feeding component (22) includes: a first baffle (221) and a second baffle (222) disposed within the partition (211) and the inverted U-shaped plate (213), with the first baffle (221) located above the second baffle (222); two first through slots (223) opened within the first baffle (221); two second through slots (224) opened within the second baffle (222); and components opened within the first baffle (221) and the second baffle (222). The first slide groove (225) is provided between the first baffle (221) and the second baffle (222), and the two ends of the rotating rod (226) pass through the two first slide grooves (225) and slide within the first slide grooves (225). The two second slide grooves (227) are opened in the rotating rod (226), and the protruding rods (228) are provided in the first slide grooves (225). The protruding rods (228) slide in the second slide grooves (227). The drive component (23) includes: a feed pipe (230) disposed at the top of the sand removal box (1); a first rotating shaft (231) disposed inside the sand removal box (1); a plurality of fan blades (232) disposed on the first rotating shaft (231), the fan blades (232) being located inside the sand removal box (1) and obliquely below the feed pipe (230); an incomplete gear (233) disposed on the first rotating shaft (231) extending to the outer end of the sand removal box (1); and a second rotating shaft (234) disposed inside the sand removal box (1). The first gear (235) is fixed to the middle of the rotating rod (226), and is set on the second rotating shaft (234) extending to the outer end of the sand removal box (1). A guide plate (236) is set on the side wall of the sand removal box (1). A rectangular plate (237) is movably inserted through the guide plate (236). Two first tooth plates (238) are set on the top of the rectangular plate (237) and mesh with the incomplete gear (233). A second tooth plate (239) is set on the bottom of the rectangular plate (237) and meshes with the first gear (235).

2. A desander for geothermal drilling according to claim 1, characterized in that: The filter component (24) includes a filter groove (241) opened in the partition (211), a first filter plate (242) disposed on one side of the partition (211), the height of the first filter plate (242) being greater than the height of the filter groove (241), and the first filter plate (242) being disposed in the filter area (214), a plurality of first filter holes (243) opened in the first filter plate (242), two guide rods (244) disposed in the filter groove (241), two first positioning plates (245) and a second positioning plate (246) disposed on one side of the first filter plate (242), and the second positioning plate (246) being located below the first positioning plate (245), and the guide rods (244) movably passing through the corresponding first positioning plate (245) and second positioning plate (246).

3. A desander for geothermal drilling according to claim 2, characterized in that: The sand discharge unit includes: a shaking component (31), which is disposed on the filter component (24) and is used to control the first filter plate (242) to shake and vibrate to discharge sand; The shaking component (31) includes: a first elastic element (311) sleeved on the outside of the guide rod (244), and the two ends of the first elastic element (311) abut against the top inner wall of the filter tank (241) and the first positioning plate (245) respectively; two rotating shafts (312) are sealed and rotated in the ear plates on both sides of the inverted U-shaped plate (213); an eccentric wheel (313) is set at one end of the rotating shaft (312), the eccentric wheel (313) is located directly below the first filter plate (242); a second gear (314) is set at the other end of the rotating shaft (312); and the rotating shaft (312) and the second gear (314) are connected by a one-way bearing. The assist component (32) is disposed on the vibration component (31) and is used to drive the vibration component (31) to work.

4. A desander for geothermal drilling according to claim 3, characterized in that: The assisting component (32) includes: two horizontal plates (321) fixed on the inner walls of the two ear plates of the inverted U-shaped plate (213); four arc-shaped extrusion plates (322) set on the second baffle (222); a third slide groove (323) opened in the horizontal plate (321) for the arc-shaped extrusion plates (322) to slide; a fourth slide groove (324) opened in the horizontal plate (321) and connected to the third slide groove (323); and a fifth slide groove (324) opened on the two side walls of the fourth slide groove (324). 25), a drive tooth plate (326) slidingly fitted in the fourth slide groove (324), an arc-shaped pressure plate (327) set on one side of the drive tooth plate (326), guide plates (328) set on both sides of the drive tooth plate (326), the guide plate (328) slidingly fitted in the fifth slide groove (325), a second elastic member (329) set in the fourth slide groove (324), and the two ends of the second elastic member (329) are respectively fixed to the inner wall of the fourth slide groove (324) and the drive tooth plate (326).

5. A desander for geothermal drilling according to claim 4, characterized in that: The sand pushing unit includes: a misaligned sand removal component (41), which is disposed on the shaking component (31) and is used to remove the sand particles that cannot be removed due to vibration in the first filter plate (242) again; The misaligned sand removal component (41) includes: a second filter plate (411) disposed on one side of the first filter plate (242), two guide grooves (412) opened in the first filter plate (242), two square blocks (413) disposed on one side of the second filter plate (411), and the two square blocks (413) are slidably fitted in the corresponding guide grooves (412), a cylindrical rod (414) disposed in the square block (413), two guide blocks (415) disposed on the first filter plate (242), the cylindrical rod (414) movably passing through the guide block (415), a third elastic member (416) sleeved on the cylindrical rod (414), and the two ends of the third elastic member (416) abutting against the square block (413) and the guide block (415) respectively, and two blocking blocks (417) disposed on the guide rod (244), the blocking blocks (417) being located above the cylindrical rod (414); Misalignment auxiliary component (42); disposed on misalignment sand removal component (41), used to assist in removing sand particles more easily when the second filter plate (411) and the first filter plate (242) are misaligned.

6. A desander for geothermal drilling according to claim 5, characterized in that: The misalignment auxiliary component (42) includes: two L-shaped limiting plates (421) disposed on one side of the first filter plate (242), and the second filter plate (411) is slidably fitted in the L-shaped limiting plates (421), a plurality of second filter holes (422) opened in the second filter plate (411), and the bottom groove wall of the second filter hole (422) is inclined, and the vertical section of the inclined surface has a downward trend from top to bottom and from the first filter plate (242) to the second filter plate (411).

7. A method of using a desander for geothermal drilling, comprising the desander for geothermal drilling as described in claim 6, characterized in that: Includes the following steps, The mud is transported through the feed pipe (230) to the sand removal box (1) and falls onto the fan blade (232), which drives the fan blade (232), the first rotating shaft (231) and the incomplete gear (233) to rotate. When the incomplete gear (233) rotates, it drives the two first tooth plates (238) to move in opposite directions, which in turn drives the second tooth plate (239) to move back and forth up and down. When the second tooth plate (239) moves back and forth up and down, it drives the first gear (235) and the second rotating shaft (234) to rotate back and forth, which in turn drives the rotating rod (226) to swing back and forth. When the rotating rod (226) swings back and forth, it drives the first baffle (221) and the second baffle (222) to move back and forth. When the first baffle (221) and the second baffle (222) move back and forth, the first through groove (223) and the second through groove (224) alternately communicate with the filter area (214), so that when one filter area (214) is filtering, the other filter area (214) is discharging sand, and the two filter areas (214) alternate.

8. The method of using a desander for geothermal drilling according to claim 7, characterized in that: When the arc-shaped pressure plate (327) is pressed by the arc-shaped extrusion plate (322), it drives the drive gear plate (326) to move. When the drive gear plate (326) moves into the fourth slide groove (324), the one-way bearing between the second gear (314) and the rotating shaft (312) is locked. When the drive gear plate (326) moves, it drives the second gear (314), the rotating shaft (312) and the eccentric wheel (313) to rotate. When the eccentric wheel (313) rotates, it drives the second gear (314), the rotating shaft (312) and the eccentric wheel (313) to rotate. The first filter plate (242) moves upward, which in turn drives the first positioning plate (245) to move upward and causes the first positioning plate (245) to press against the first elastic element (311). When the eccentric wheel (313) stops pressing against the first filter plate (242), the first filter plate (242) moves downward under the rebound force of the first elastic element (311). When the eccentric wheel (313) rotates back and forth, it causes the first filter plate (242) to shake up and down. When the first filter plate (242) shakes up and down, it causes the second filter plate (411) to move accordingly. When the second filter plate (411) moves, when the cylindrical rod (414) in the square block (413) encounters the obstruction of the blocking block (417) while moving upward, the second filter plate (411) will no longer move upward, while the first filter plate (242) will continue to move upward. That is, the first filter plate (242) and the second filter plate (411) will be misaligned with each other, thereby pushing out the sand particles in the first filter hole (243) and the second filter hole (422).

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