Drilling fluid continuous screening tool for well drilling

Abstract

The utility model relates to a drilling fluid continuous screening tool for well drilling, which comprises a screening box which is divided into a drilling fluid screening processing cavity, and a bent filter plate which can filter input drilling fluid is arranged in the screening box. Side deslagging chutes capable of collecting intercepted particulate impurities are also formed in the two sides of the bent filter plate in an aligned manner; a bent scraping plate capable of scraping particulate matter impurities intercepted by the plate surface of the bent filter plate is arranged above the bent filter plate, and a dredging roller capable of reversely dredging holes in the bent filter plate is further arranged below the bent filter plate; the side face of the screening box is further provided with a driving assembly which is connected with the bending scraping plate and the dredging roller at the same time and drives the bending scraping plate and the dredging roller to move synchronously. According to the utility model, the screening structure can be periodically cleaned without shutdown and disassembly, so that the smoothness and the continuous screening efficiency of the screening structure are ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of drilling fluid treatment equipment, and in particular to a continuous screening tool for drilling fluid. Background Technology

[0002] Core drilling equipment is a common engineering testing device, often used for sampling underground rocks. The main principle is that a hollow drill bit is driven by a motor or engine to rotate and move downwards, drilling a hole on the surface and forming a columnar core inside the drill bit. The core is eventually preserved inside the hollow drill bit after fracturing. The core is then retrieved after the drill bit is lifted off the surface. Drilling fluid is a general term for various circulating fluids that meet the needs of drilling operations through multiple functions. Drilling fluid is the lifeblood of drilling, also known as borehole flushing fluid. Drilling fluids can be classified by composition into water, mud, clay-free flushing fluid, emulsions, foam, and compressed air, etc. Drilling fluid is mainly used to clean the wellbore, lubricate the drill bit, and carry cuttings. Because drilling fluid is recyclable, existing drilling systems typically perform secondary recycling of the drilling fluid returning from the well, thus forming a continuous drilling fluid working loop.

[0003] When used drilling fluid is recycled, it typically contains particulate impurities such as rock cuttings and mineral particles. The presence of these impurities significantly reduces the performance of the drilling fluid re-entering the drilling system, thereby decreasing lubrication, increasing pumping resistance, and affecting proppant carrying capacity. Therefore, filtration is usually required during the recycling and processing of drilling fluid to separate these particulate impurities. However, in existing drilling fluid recycling filtration methods, particulate impurities can clog filter screens and other screening equipment, leading to decreased continuous filtration efficiency. Conventional cleaning methods require disassembling and cleaning the filter screens while the system is shut down, which is inconvenient, reduces overall work efficiency, hinders the continuity of screening, and affects the progress of drilling operations. Utility Model Content

[0004] The purpose of this invention is to provide a drilling fluid continuous screening fixture that can perform periodic cleaning of the screening structure without stopping the machine or disassembling it, thereby ensuring the smooth flow of the screening structure and continuous screening efficiency. This solves the problems of existing drilling fluid filtration equipment where particles accumulate on the filter screen and other screening facilities after continuous filtration for a period of time, causing blockage and hindering efficient continuous filtration. Furthermore, disassembly-based cleaning requires machine shutdown, reducing overall efficiency and preventing continuous screening, thus hindering the progress of drilling work.

[0005] The technical solution adopted by this utility model is as follows: a drilling fluid continuous screening tool for drilling, including a screening box that separates a drilling fluid screening and processing chamber, a bent filter plate that can filter the input drilling fluid is provided in the screening box, and side slag discharge chutes that can collect intercepted particulate impurities are also arranged on both sides of the bent filter plate; a bent scraper that can scrape off the particulate impurities intercepted on the surface of the bent filter plate is provided above the bent filter plate, and a clearing roller that can reverse the perforation of the bent filter plate is provided below the bent filter plate; a drive assembly that is connected to the bent scraper and the clearing roller and drives the two to move synchronously is also provided on the side of the screening box.

[0006] According to a preferred embodiment, the two side slag discharge chutes are arranged in an aligned manner on two parallel inner sidewalls of the screening box. The bent filter plate is arranged in the screening box such that the two folded edges of its plate body are connected to the opening edges of the two side slag discharge chutes facing each other, so that the particulate impurities scraped off by the bent scraper during the translation process can fall into the side slag discharge chutes.

[0007] According to a preferred embodiment, the bent filter plate includes an inclined main filter plate and an inclined filter barrier plate connected at an angle to the inclined main filter plate.

[0008] According to a preferred embodiment, the inclined side of the slag discharge chute extends through the side wall of the screening box and communicates with the slag collection box trough located on the outside of the screening box.

[0009] According to a preferred embodiment, the bending scraper includes a scraper body, a guide slider, and a linkage mounting strip. The guide slider and the linkage mounting strip are respectively connected to both sides of the scraper body. The guide slider is movably embedded in the first guide support groove in a manner that allows for lateral translation. The linkage mounting strip is detachably connected to the inverted U-shaped translation transmission strip of the drive assembly.

[0010] According to a preferred embodiment, the drum body of the unclogging drum is rotatably connected to the insert sliding column via a bearing sleeve, and the other end of the drum body is connected to the drive assembly through the screening box.

[0011] According to a preferred embodiment, a plurality of unblocking insertion posts are arranged in an array around the roller body of the roller body; and at both ends of the roller body, there are rotating shafts that can be connected to the bearing sleeve and the drive assembly.

[0012] According to a preferred embodiment, a transmission shaft is coaxially connected to the output shaft of the forward and reverse rotation motor of the drive assembly, and the end of the transmission shaft away from the forward and reverse rotation motor is connected to the rotating shaft. A translation drive gear capable of rotating synchronously with the transmission shaft is also mounted on the transmission shaft, and the translation drive gear meshes with the translation drive rack. An L-shaped translation limiting strip and an inverted U-shaped translation transmission strip are respectively connected to the top and bottom of the forward and reverse rotation motor, wherein the end of the L-shaped translation limiting strip away from the forward and reverse rotation motor is connected to a guide rail mounted on the outer wall of the screening box.

[0013] According to a preferred embodiment, the inverted U-shaped translational transmission bar connects the end furthest from the forward and reverse rotation motor to the bending scraper in a manner that drives the bending scraper to move synchronously.

[0014] The beneficial effects of this utility model are:

[0015] The bending scraper and unclogging roller in this application move synchronously. Driven by the drive assembly, the bending scraper and unclogging roller respectively scrape and move impurities on the upper surface of the bent filter plate and roll in an insert-type unclogging motion from bottom to top. This synchronously and completely cleans the pores and surface deposits of the plate in the same area, ensuring the cleanliness of the plate and the unobstructed flow of the filter holes after cleaning, thus guaranteeing the continuous filtration efficiency and effectiveness of the bent filter plate 2. The bending scraper and unclogging roller in this application can periodically clean the upper and lower sides of the bent filter plate under the drive assembly, completing the cleaning of deposits and unclogging of the pores without stopping the machine or disassembling it. This ensures the screening capacity of the bent filter plate during continuous operation, thereby improving the convenience of cleaning, overall processing efficiency, and the continuity of screening. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a preferred drilling fluid continuous screening tool proposed in this utility model;

[0017] Figure 2 This is a partial top plan view of a preferred drilling fluid continuous screening tool proposed in this utility model.

[0018] List of reference numerals

[0019] 1: Screening box; 2: Bending filter plate; 3: Side slag discharge chute; 4: Bending scraper; 5: Unblocking roller; 6: Drive assembly; 11: Feed inlet; 12: Discharge outlet; 13: Embedded side mesh plate; 14: Inclined transverse chute; 15: Strip-shaped through chute; 16: Strip-shaped through flat chute; 17: First guide support transverse chute; 18: Second guide support transverse chute; 21: Inclined main filter plate; 22: Inclined filter baffle plate; 31: Slag collection. 41: Scraper body; 42: Guide slider; 43: Linkage mounting strip; 51: Roller body; 52: Inserted sliding column; 53: Bearing sleeve; 511: Roller body; 512: Unblocking insertion column; 513: Rotating shaft; 61: Forward and reverse rotation motor; 62: Translation drive gear; 63: Translation drive rack; 64: Transmission shaft; 65: L-shaped translation limiting strip; 66: Inverted U-shaped translation transmission strip; 67: Guide rail. Detailed Implementation

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are for the purpose of helping to understand this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning.

[0022] The following is a detailed explanation with reference to the accompanying drawings.

[0023] Example 1

[0024] This application provides a drilling fluid continuous screening tool for drilling, which includes a screening box 1, a bent filter plate 2, a side slag discharge chute 3, a bent scraper 4, a dredging roller 5, and a drive assembly 6.

[0025] according to Figure 1-2In one specific embodiment, the screening box 1 can be partitioned into a drilling fluid screening and processing chamber in the work area as needed. A bent filter plate 2 is installed inside the screening box 1 to filter the input drilling fluid. Side slag discharge chutes 3 are also arranged on both sides of the bent filter plate 2 to collect intercepted particulate impurities. The two side slag discharge chutes 3 are arranged in an aligned manner on two parallel inner sidewalls of the screening box 1. The bent filter plate 2 is arranged in the screening box 1 such that the edges of its two plate folds are connected to the opening edges of the two side slag discharge chutes 3 facing each other, so that the particulate impurities scraped off by the bent scraper 4 during translation can fall into the side slag discharge chutes 3. A bent scraper 4 is provided above the bent filter plate 2 to scrape off the particulate impurities intercepted on its surface. A clearing roller 5 is also provided below the bent filter plate 2 to reverse-open the holes in the bent filter plate 2. A drive assembly 6 is also provided on the side of the screening box 1, which is connected to and drives the bending scraper 4 and the unclogging roller 5 to move synchronously. The bending scraper 4 and the unclogging roller 5, as configured in this application, move synchronously, so that under the drive assembly 6, the bending scraper 4 and the unclogging roller 5 respectively scrape and move impurities on the upper surface of the bending filter plate 2 and roll from bottom to top to open the holes, thus simultaneously and completely cleaning the holes and surface deposits of the plate in the same area. This ensures the cleanliness of the plate and the unobstructed flow of the filter holes after cleaning, guaranteeing the continuous filtration efficiency and effect of the bending filter plate 2. The bending scraper 4 and the unclogging roller 5, as configured in this application, can periodically clean the upper and lower sides of the bending filter plate 2 under the drive of the drive assembly 6, completing the cleaning of deposits and unclogging of the holes of the bending filter plate 2 without stopping the machine or disassembling it. This ensures the screening capacity of the bending filter plate 2 during continuous operation, thereby improving the convenience of cleaning, improving the overall processing efficiency, and the continuity of screening. The impurities transferred by the side slag discharge chute 3 provided in this application can also be collected outside the screening box 1, and the residual drilling fluid can be filtered and returned to ensure sufficient screening.

[0026] Preferably, the top of the screening box 1 is provided with a feed inlet 11. Preferably, the bottom of the screening box 1 is also provided with a discharge outlet 12 for discharging the filtered drilling fluid. More preferably, the side of the screening box 1 covered by the slag collection box 31 is also provided with an embedded side mesh plate 13 for returning residual drilling fluid. Specifically, a plurality of inclined return holes are arrayed on the plate body of the embedded side mesh plate 13. Preferably, the side of the screening box 1 is provided with an inclined placement transverse groove 14, a strip-shaped through groove 15 communicating with the inclined placement transverse groove 14, and a strip-shaped through flat groove 16 above the strip-shaped through groove 15. More preferably, the inner side of the screening box 1 away from the strip-shaped through groove 15 and the strip-shaped through flat groove 16 is provided with a first guide support transverse groove 17 and a second guide support transverse groove 18 that are parallel to each other and located above and below the bent filter plate 2, respectively. The screening box 1 provided in this application can directionally guide the recovered drilling fluid, so that the drilling fluid is effectively screened and filtered by the bent filter plate 2 when it passes through the box. This allows particulate impurities in the recovered drilling fluid to be intercepted by the bent filter plate 2, thereby limiting only the drilling fluid to pass through the bent filter plate 2. This ensures that the output drilling fluid after screening has the required fineness, thus avoiding the problem of large-particle impurities mixing into the drilling system and causing damage to the drilling equipment.

[0027] Preferably, the bent filter plate 2 includes an inclined main filter plate 21 and an inclined filter barrier plate 22 connected at an angle to the inclined main filter plate 21 and in the opposite direction of inclination. Preferably, the inclined main filter plate 21 and the inclined filter barrier plate 22 are spliced ​​together to form a bent plate body with an obtuse angle between their plate bodies. More preferably, straight sub-plates are connected to the opposite edges of the inclined main filter plate 21 and the inclined filter barrier plate 22. More preferably, a plurality of filter holes are arrayed on the plate bodies of the inclined main filter plate 21 and the inclined filter barrier plate 22. Specifically, the filter holes on the inclined main filter plate 21 are frustum-shaped holes that are narrower at the top and wider at the bottom. Specifically, the filter holes on the inclined filter barrier plate 22 are downward-sloping through holes that are at an angle to its plate surface. More preferably, the opposite edges of the inclined main filter plate 21 and the inclined filter plate 22, that is, the two parallel straight edges of the bent filter plate 2, are aligned and connected to the two inner side walls of the screening box 1 by welding, bonding or other means, so as to effectively position the working position of the bent filter plate 2 in the screening box 1. Specifically, the two parallel straight edges of the bent filter plate 2 are provided with flat sub-plates, and flat support strips are welded on the inner wall of the screening box 1. The placement position of the bent filter plate 2 is defined by placing the flat sub-plates on the flat support strips. The stability of the placement is ensured by means of snap-fit ​​connection, bolt positioning, welding or bonding. According to different screening requirements and disassembly and maintenance requirements, the connection between the screening box 1 and the bent filter plate 2 is achieved by using a combination assembly method that is easy to disassemble and assemble, such as a matching snap-fit ​​sleeve connection. For example, the lower surface of the flat sub-plate is provided with a snap-fit ​​protrusion, and the flat support strip is provided with a matching groove that matches the snap-fit ​​protrusion, so that the two can be snap-fitted and assembled together.

[0028] Preferably, the side discharge chute 3, near the side wall of the screening box 1, is fixedly attached to the inner wall of the screening box 1 by welding, bonding, or other methods. More preferably, the inclined lower side of the side discharge chute 3 penetrates the side wall of the screening box 1 and communicates with the slag collection box trough 31 located on the outer side of the screening box 1. Preferably, the bottom of the slag collection box trough 31 is provided with a discharge port to facilitate the external discharge and transfer of particulate impurities collected within its cavity. Preferably, a sealing cover is provided below the discharge port, allowing the discharge port to be opened or closed as needed. Figure 2As shown, in a preferred embodiment, a slag-pushing plate is also provided in the side slag discharge chute 3, which can be adapted to the cross-section of its cavity to push impurities outward in a directional manner. More preferably, the slag-pushing plate is connected to a hydraulic telescopic push rod inserted into the wall of the screening box 1 away from the slag collection trough 31, so that the slag-pushing plate can reciprocate under the drive of the hydraulic telescopic push rod, thereby periodically cleaning the side slag discharge chute 3. Specifically, the sleeve of the hydraulic telescopic push rod is installed on the outer wall of the screening box 1, and its telescopic core rod penetrates the wall of the screening box 1 and is connected to the slag-pushing plate. A through-hole adapted to the telescopic core rod is provided on the wall of the screening box 1. A filling washer is provided in the through-hole to fill the gap between the through-hole and the telescopic core rod, thereby scraping and cleaning impurities on the surface of the rod body when the telescopic core rod extends and retracts, ensuring the cleanliness of the rod body surface when retracted into the sleeve. Preferably, the hydraulic telescopic push rod is arranged parallel to the bottom surface of the side slag discharge chute 3. The side slag discharge chute 3 provided in this application has a large inclination and a smooth bottom surface, which allows large particles of impurities scraped into the chute to slide off the screen box 1 and be removed from the screen box 1. This allows the impurities to be collected in the slag collection box 31, facilitating the transfer of impurities by operators periodically without disassembling the screen box 1 and while maintaining continuous filtration.

[0029] Preferably, the bending scraper 4 includes a scraper body 41, a guide slider 42, and a linkage mounting strip 43. Preferably, the guide slider 42 and the linkage mounting strip 43 are respectively connected to both sides of the scraper body 41. Preferably, the guide slider 42 is movably embedded in the first guide support groove 17 in a manner that allows for lateral translation. More preferably, the linkage mounting strip 43 is detachably connected to the inverted U-shaped translational transmission strip 66 of the drive assembly 6. Specifically, the surface of the inverted U-shaped translational transmission strip 66 is provided with multiple screws, so that when the linkage mounting strip 43 is inserted into the screws and comes into contact with the inverted U-shaped translational transmission strip 66, the connection stability between the inverted U-shaped translational transmission strip 66 and the linkage mounting strip 43 is limited by the nuts fitted on the screws. The bending scraper 4 provided in this application can reciprocate and translate with the inverted U-shaped translational transmission strip 66, thereby scraping away and cleaning large particulate impurities intercepted on the upper surface of the bending filter plate 2.

[0030] Preferably, the drum body 51 of the unblocking drum 5 is rotatably connected to the insert sliding column 52 via the bearing sleeve 53. Preferably, the other end of the drum body 51 is connected to the drive assembly 6 through the screening box 1. More preferably, the insert sliding column 52 is slidably inserted into the second guide support transverse groove 18. Preferably, a plurality of unblocking insertion columns 512 are arranged in an array on the roller body 511 of the drum body 51. Preferably, rotating shafts 513 that can be connected to the bearing sleeve 53 and the drive assembly 6 are provided at both ends of the drum body 51. Preferably, the unblocking insertion columns 512 are arranged in an array with equal spacing to the filter holes of the inclined main filter plate 21. Specifically, when the annular surface of the roller body 511 is unfolded, the unblocking insertion columns 512 arranged in an array on its annular surface are distributed in the same way as the filter holes of the inclined main filter plate 21. The roller body 51 of this application can synchronously translate with the bending scraper 4 while rotating, so that the filter holes cleared by the unblocking insertion column 512 are the areas cleaned by the bending scraper 4. This assists the bending scraper 4 in clearing and cleaning the filter holes and scraping away the impurities, ensuring the unobstructed flow of the cleaned filter holes and guaranteeing the efficiency and effectiveness of filtration. The unblocking insertion column 512 of this application has a column profile smaller than that of the frustum-shaped filter hole, which facilitates the effective insertion of the circumferentially arrayed unblocking insertion columns 512 into the filter holes when the roller body 511 rotates, ensuring the effectiveness and adaptability of rolling unblocking.

[0031] Preferably, the drive assembly 6 includes a forward and reverse rotation motor 61, a translation drive gear 62, a translation drive rack 63, a drive shaft 64, an L-shaped translation limiting strip 65, an inverted U-shaped translation transmission strip 66, and a guide rail 67. Preferably, the drive shaft 64 is coaxially connected to the output shaft of the forward and reverse rotation motor 61 of the drive assembly 6 via a coupling. Specifically, the end of the drive shaft 64 away from the forward and reverse rotation motor 61 is connected to a rotating shaft 513 passing through a strip-shaped through-slot 15. Preferably, the forward and reverse rotation motor 61 can be an LG-KTYZ-60 type permanent magnet synchronous motor, which is suitable for slow rotation and forward and reverse rotation scenarios. It is equipped with an A4950 DC motor drive chip, thereby achieving periodic and quantitative alternating forward and reverse rotation by setting the working cycle and working interval cycle. Preferably, a translation drive gear 62 that can rotate synchronously with the drive shaft 64 is also mounted on it. More preferably, the translation drive gear 62 meshes with the translation drive rack 63 disposed on the inner top surface of the inclined transverse groove 14, so that when the translation drive gear 62 rotates, it can force the transmission shaft 64 and the forward and reverse rotation motor 61 to translate along the length direction of the translation drive rack 63. Preferably, the top and bottom of the forward and reverse rotation motor 61 are respectively connected to an L-shaped translation limiting strip 65 and an inverted U-shaped translation transmission strip 66. More preferably, the end of the L-shaped translation limiting strip 65 away from the forward and reverse rotation motor 61 is connected to a guide rail 67 mounted on the outer wall of the screening box 1 to limit the translation direction and the stability of the suspended installation. Preferably, the guide rail 67 is a conventional sliding connection rail and slider structure, wherein the rail is mounted on the outer wall of the screening box 1, and the slider that can slide in a direction within the rail is connected to the L-shaped translation limiting strip 65. Specifically, the two can be connected by bolts, welding, or bonding for convenience. Preferably, the inverted U-shaped translational transmission bar 66 is inserted into the strip-shaped through groove 16, so that the end of the inverted U-shaped translational transmission bar 66 away from the forward and reverse rotation motor 61 is connected to the bending scraper 4 in a way that drives the bending scraper 4 to move synchronously. When the forward and reverse rotation motor 61 configured in this application drives the output shaft to rotate, it drives the translational drive gear 62 and the transmission shaft 64 to rotate synchronously. The rotation of the translational drive gear 62, which meshes with the translational drive rack 63, causes it to roll along the length direction of the translational drive rack 63, thereby realizing the translation of the entire assembly. The rotating transmission shaft 64 drives the synchronous roller body 51 to roll, so that the roller body 51 rolls on the lower surface of the inclined main filter plate 21 to insert and unclog the filter holes of the inclined main filter plate 21. At the same time, the translation of the entire component can be driven by the inverted U-shaped translation transmission strip 66 to drive the bending scraper 4 to also translate synchronously, so that the pore opening of the roller body 51 and the scraping and cleaning of the bending scraper 4 are carried out simultaneously on the same area, so as to ensure that the inclined main filter plate 21 has unobstructed flow after cleaning, and to ensure the efficiency and effect of continuous filtration.

[0032] Preferably, the electrical components involved in this application, such as the forward and reverse rotation motor 61 and the hydraulic telescopic rod, are all electrically connected to the controller and the power supply. The control method of this application is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is only used to protect the mechanical device and its mechanical structural features. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0033] The surface connection method between components not explicitly specified in this application may be a detachable connection method such as conventional bolt connection or interlocking, or a fixed connection method such as welding. As these are conventional connection methods, this application will not elaborate further on this part. Specifically, the connecting ends of the assembled components all form flange structures, and the two flange structures are connected by bolts, gaskets, or other structures.

[0034] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A drilling fluid continuous screening fixture, comprising a screening box (1) that divides a drilling fluid screening and processing chamber, characterized in that, A bent filter plate (2) capable of filtering the input drilling fluid is provided in the screening box (1), and side slag discharge chute (3) capable of collecting intercepted particulate impurities is also arranged on both sides of the bent filter plate (2). A bent scraper (4) is provided above the bent filter plate (2) to scrape off particulate impurities intercepted on its surface, and a clearing roller (5) is provided below the bent filter plate (2) to reverse the perforation of the bent filter plate (2). A drive assembly (6) is also provided on the side of the screening box (1) to be connected to the bending scraper (4) and the unblocking roller (5) and to drive the two to move synchronously.

2. The drilling fluid continuous screening tooling for drilling as described in claim 1, characterized in that, The two side discharge chute (3) are arranged in an aligned manner on the two parallel inner sidewalls of the screening box (1). The bent filter plate (2) is arranged in the screening box (1) such that the two folded edges of its plate body are connected to the opposite opening edges of the two side slag discharge troughs (3), so that the particulate impurities scraped off by the bent scraper (4) during the translation process can fall into the side slag discharge troughs (3).

3. The drilling fluid continuous screening tooling for drilling as described in claim 2, characterized in that, The bent filter plate (2) includes an inclined main filter plate (21) and an inclined filter barrier plate (22) connected at an angle to the inclined main filter plate (21).

4. The drilling fluid continuous screening tooling for drilling as described in claim 3, characterized in that, The inclined side of the slag discharge chute (3) extends through the side wall of the screening box (1) and communicates with the slag collection box trough (31) located on the outside of the screening box (1).

5. The drilling fluid continuous screening tooling for drilling as described in claim 4, characterized in that, The bent scraper (4) includes a scraper body (41), a guide slider (42), and a linkage mounting strip (43), wherein, The scraper body (41) is connected to guide sliders (42) and linkage mounting strips (43) on both sides respectively. The guide slider (42) is movably embedded in the first guide support groove (17) in a manner that allows for lateral translation; the linkage mounting plate (43) is detachably connected to the inverted U-shaped translation transmission bar (66) of the drive assembly (6).

6. The drilling fluid continuous screening tooling for drilling as described in claim 5, characterized in that, The main body (51) of the unblocking roller (5) is rotatably connected to the insert sliding column (52) via a bearing sleeve (53), and the other end of the main body (51) is connected to the drive assembly (6) through the screening box (1).

7. The drilling fluid continuous screening tooling for drilling as described in claim 6, characterized in that, A plurality of unblocking insertion posts (512) are arranged in an array on the roller body (511) of the roller body (51); At both ends of the roller body (51), there are rotating shafts (513) that can be connected to the bearing sleeve (53) and the drive assembly (6).

8. The drilling fluid continuous screening tooling for drilling as described in claim 7, characterized in that, A drive shaft (64) is coaxially connected to the output shaft of the forward and reverse rotation motor (61) of the drive assembly (6), and the end of the drive shaft (64) away from the forward and reverse rotation motor (61) is connected to the rotating shaft (513). A translation drive gear (62) capable of rotating synchronously with the drive shaft (64) is also mounted on the drive shaft (64), and the translation drive gear (62) meshes with the translation drive rack (63); The top and bottom of the forward and reverse rotation motor (61) are respectively connected to an L-shaped translation limiting strip (65) and an inverted U-shaped translation transmission strip (66), wherein the L-shaped translation limiting strip (65) is away from the forward and reverse rotation motor. One end of the motor (61) is connected to the guide rail (67) mounted on the outer wall of the screening box (1).

9. The drilling fluid continuous screening tooling for drilling as described in claim 8, characterized in that, The inverted U-shaped translational transmission bar (66) is connected to the bending scraper (4) at one end away from the forward and reverse rotation motor (61) in a way that drives the bending scraper (4) to move synchronously.

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