Symmetric synchronous cylinder driven baffle mud scraping device

Abstract

This invention discloses a symmetrical synchronous cylinder-driven baffle scraping device, relating to the field of oil drilling equipment technology. Its specific structure includes: a frame with an assembly cavity inside, and a through hole at the bottom of the frame for drill pipe passage; a scraper disc installed at the bottom of the assembly cavity, its position corresponding to the through hole; a synchronous drive assembly installed inside the assembly cavity; and a baffle installed at the movable end of the synchronous drive assembly. The synchronous drive assembly drives the baffle to rotate, allowing the baffle to switch between a working position covering the scraper disc and a non-working position away from the scraper disc. This invention solves the technical problems of inconvenient assembly and operation and insufficient scraping effect in existing scraping devices. This solution, through a synchronous mechanism, can limit the movement of multiple baffles, preventing axial movement of the scraper disc during scraping, thereby ensuring the scraping effect.

Description

Technical Field

[0001] This invention relates to the field of oil drilling equipment technology, and in particular to a symmetrical synchronous cylinder-driven baffle scraping device. Background Technology

[0002] In oil drilling operations, the drill pipe must be pulled out of the well during tripping, at which point the mud adhering to the outer wall of the drill pipe must be effectively scraped off. Currently, manual scraping is commonly used on-site, with operators using hand scrapers to scrape mud from both sides of the drill pipe on a rotary table. This method has several problems: First, workers must stand for extended periods in the slippery and dangerous rotary table area, facing serious safety risks such as slipping and being injured by falling debris; the labor intensity is high and the working environment is harsh. Second, manual scraping cannot form a closed, continuous scraping ring around the drill pipe, resulting in some mud residue and making it difficult to guarantee the scraping effect. Incomplete scraping not only exacerbates mud accumulation on the drilling platform and makes the surface slippery, but also may affect the gripping effect of the slips due to residual mud on the drill pipe surface, thus potentially increasing the risk of a major accident such as drill string falling into the well.

[0003] To address these issues, various mechanical mud scraping devices have been developed in the industry, such as annular split mud scrapers, swing-arm mud scrapers, and fixed mud scrapers. However, these existing devices generally suffer from the following drawbacks: unreasonable structural design leads to difficulties in on-site installation and commissioning; furthermore, the operation of their baffles usually relies on manual operation, which is extremely inconvenient in the mud-splashing, space-constrained wellhead environment, resulting in low efficiency and increased exposure time and risk for personnel in hazardous areas. Summary of the Invention

[0004] The purpose of this invention is to provide a symmetrical synchronous cylinder-driven baffle scraping device, which solves the technical problem of inconvenient manual operation of existing scraping devices.

[0005] This application discloses a symmetrical synchronous cylinder-driven baffle scraping device, comprising: The frame has an assembly cavity inside, and a through hole for the drill rod to pass through is opened at the bottom of the frame; A sludge scraper is installed at the bottom of the assembly cavity, and its position corresponds to the through hole; A synchronous drive component is installed inside the assembly cavity; A baffle is installed on the movable end of the synchronous drive component. The synchronous drive component drives the baffle to rotate, so that the baffle switches between a working position that covers the sludge scraper and a non-working position that is away from the sludge scraper.

[0006] This application includes a drive component that rotates the baffle, thereby limiting the position of the scraper disc and ensuring its stability during operation.

[0007] Based on the above technical solution, the present application can be further improved as follows: Furthermore, the synchronization drive component includes: A synchronous drive cylinder is installed inside the assembly cavity; A lever is installed at the piston rod end of the synchronous drive cylinder; A central pin is installed at the end of the lever away from the synchronous drive cylinder; A slide rail unit is installed inside the assembly cavity, and the slide rail unit has a slide groove that slides and engages with the central pin. The synchronous motion linkage is mounted on the central pin, and the baffle is mounted on the synchronous motion linkage. The beneficial effect of this step is that the synchronous drive cylinder drives the lever to rotate, thereby pulling the synchronous motion linkage to move synchronously, thus realizing the synchronous movement of the baffle.

[0008] Furthermore, the lever is L-shaped, and the middle part of the lever is rotatably mounted inside the assembly cavity via a lever pin; The baffle is installed inside the frame via a rotary shaft, and the bottom of the baffle is higher than the upper surface of the lever. The advantage of this step is that the L-shaped lever facilitates the stable movement of the subsequent center pin along the slide groove.

[0009] Furthermore, the slide rail unit includes: A lower slide rail is located at the bottom of the assembly cavity; An upper slide rail is installed on the side of the assembly cavity, and the upper slide rail is located on the lower slide rail. The upper slide rail and the lower slide rail are both provided with the slide groove. The protective cover, installed on the upper slide rail, has the beneficial effect of preventing mud from entering the chute and hindering sliding, thus preventing failure.

[0010] Furthermore, the baffle is divided into a right baffle, a middle baffle, and a left baffle, with the middle baffle located between the right baffle and the left baffle; The synchronous motion linkage includes: The first symmetrical connecting rod is mounted at one end on the central pin. A first central shaft is installed at the other end of the first symmetrical connecting rod, and the right baffle is installed on the first central shaft; The second symmetrical connecting rod is mounted on the central pin at one end; The second central shaft is installed at the end of the second symmetrical link away from the first symmetrical link, and the second central shaft is equipped with the middle baffle (402). A synchronizing link, one end of which is connected to the second central shaft; The synchronous connecting rod pin is installed at the end of the synchronous connecting rod away from the second symmetrical connecting rod, and the left baffle is installed on the synchronous connecting rod pin. The beneficial effect of this step is that the baffle can be rotated synchronously by the cooperation of the first and second symmetrical connecting rods and the synchronous connecting rod, so as to complete the switching between working position and non-working position and meet the working requirements of the sludge scraper.

[0011] Furthermore, the first symmetrical link, the second symmetrical link, and the synchronous link are all arc-shaped links. The second symmetrical link is symmetrical to the first symmetrical link about the center line of the slide groove, and the length of the second symmetrical link is less than the length of the synchronous link.

[0012] Furthermore, the length of the line connecting the center of the first central shaft and the center of the central pin is L1, and the length of the line connecting the center of the second central shaft and the center of the central pin is L2, where L1 = L2; The centers of the rotation shaft on the middle baffle, the rotation shaft on the left baffle, the center of the synchronous connecting rod pin, and the center of the second central shaft are connected in sequence to form a parallelogram. The advantage of this step is that by limiting the geometric dimensions, the synchronicity of the baffle rotation angle can be guaranteed.

[0013] Furthermore, the second central shaft has an axial oil passage and multiple radial flow channels, the radial flow channels are connected and cooperate with the axial oil passage, and the side of the second central shaft is connected to an oil nozzle. The beneficial effect of this step is that the design of the oil passage enables lateral oiling.

[0014] Furthermore, the free end of the baffle is provided with a groove; The assembly cavity is provided with a first limiting block and a second limiting block, which are located on both sides of the rotation path of the baffle, respectively, to limit the working position and the non-working position. The beneficial effect of this step is that the first and second limiting blocks cooperate with each other to prevent the synchronous movement link from over-moving.

[0015] Furthermore, the frame is equipped with multiple fixing units; The fixing unit includes: A fixing seat, wherein the fixing seat has a cavity inside and is disposed within the assembly cavity; A fixing bolt is disposed within the cavity, with the top of the fixing bolt extending out of the cavity; An anti-loosening plug is disposed in the cavity, and the top of the anti-loosening plug mates with the bottom of the fixing bolt; The brake bolt passes through the anti-loosening plug from the outside of the frame. The advantage of this step is that it facilitates installation by fixing the unit and ensures the stability of the connection after the application.

[0016] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: 1. This application is installed in the space formed by the lower part of the slips or the rotary table beam to achieve mud scraping. The scraped mud will not affect the slips' gripping of the drill bit, which is an effective measure to avoid slip slipping.

[0017] 2. This application achieves the synchronous movement of three baffles by using a synchronous drive cylinder, which can realize the axial limit of the scraper disc or allow the radial floating space of the scraper disc, and realizes mechanized control through the on-site air source.

[0018] 3. The fixing unit in this application can prevent the fixing bolts from loosening and falling into the well, thus ensuring drilling safety downhole.

[0019] 4. This application is equipped with axial oil passages and radial flow passages, which allow for the addition of grease in a horizontal state when installed under the slips, thus extending the service life of the equipment. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a symmetrical synchronous cylinder-driven baffle scraping device according to a specific embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the bottom structure; Figure 3 for Figure 1 Another structural diagram from a different angle; Figure 4 for Figure 1 Fixed unit section view; Figure 5 for Figure 1 Top view; Figure 6 for Figure 5 Sectional view along axis AA; Figure 7 for Figure 1 A schematic diagram of the exploded structure; Figure 8 for Figure 1 A cross-sectional view of the synchronous connecting rod pin. Figure 9 for Figure 1 A cross-sectional view at the center pin; Figure 10 This is a schematic diagram illustrating the use of a symmetrical synchronous cylinder-driven baffle scraping device according to a specific embodiment of the present invention. The attached figures are labeled as follows: 1-Frame; 2-Scraper disc; 3-Synchronous drive assembly; 4-Baffle; 5-Rotating shaft; 6-Fixing unit; 7-Drill rod; 8-Power slip; 101-Assembly cavity; 102-Through hole; 103-First limiting block; 104-Second limiting block; 301-Synchronous drive cylinder; 302-Lever; 303-Center pin; 304-Slide rail unit; 305-Slide groove; 306-Synchronous motion linkage; 307-Lever pin; 308-Lower slide rail; 309-Upper slide rail; 310-Guard cover; 311-First symmetrical connecting rod; 312-First central shaft; 313-Second symmetrical connecting rod; 314-Second central shaft; 315-Synchronous connecting rod; 316-Synchronous connecting rod pin; 317-Axial oil passage; 318-Radial flow passage; 319-Oil nozzle; 401 - Right baffle; 402 - Middle baffle; 403 - Left baffle; 404 - Groove; 601-Fixed base; 602-Cavity; 603-Fixing bolt; 604-Anti-loosening plug; 605-Brake bolt; 606-Cocker pin. Detailed Implementation

[0022] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention. It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0023] In the description of this application, it should be understood that the terms "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] In this application, unless otherwise expressly specified and limited, the terms "installation," "setup," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0026] Example: During oil drilling tripping operations, a large amount of mud adheres to the surface of the drill pipe as it is pulled up from the well, requiring scraping at the wellhead. Traditional manual operation with a hand-held mud scraper poses safety risks such as slipping and falling objects causing injury, is labor-intensive, and the scraper cannot form a closed loop, resulting in some mud remaining on the drill pipe surface. This can lead to safety hazards such as poor slip holding, drill string falling into the well, and slippery drilling platform surfaces.

[0027] To address the aforementioned technical issues, such as Figure 1-10 As shown, this application proposes a symmetrical synchronous cylinder driven baffle scraping device. The core idea is to install this application at the bottom of the power chuck, and form a drill rod channel through the cooperation of the frame and the scraping disc. At the same time, a drive component is set inside the frame to drive the baffle to rotate, thereby pressing the scraping disc to facilitate subsequent scraping operations.

[0028] like Figure 1 , 2 As shown, the structure of this application is as follows, including: The frame 1 has an assembly cavity 101 inside, and a through hole 102 for the drill rod to pass through is provided at the bottom of the frame 1. The sludge scraper 2 is installed at the bottom of the assembly cavity 101, and its position corresponds to the through hole 102; Synchronous drive component 3 is installed inside the assembly cavity 101; Baffle 4 is installed on the movable end of the synchronous drive component 3. The synchronous drive component 3 drives the baffle 4 to rotate, so that the baffle 4 switches between a working position that covers the sludge scraper 2 and a non-working position that is away from the sludge scraper 2.

[0029] The frame can be integrally cast or welded into a connecting disc structure, which is adapted to the bottom of the power bearing. Its internal assembly cavity is located in the middle and is used to accommodate subsequent scraper discs, synchronous drive components 3, baffles, and other components. The specific structure and assembly method of the scraper disc are existing and will not be described in detail here.

[0030] The synchronous drive component can be a pneumatic actuator to provide power, specifically to drive the baffle to switch stably and reliably between the working and non-working positions. The baffle can be a component formed by stamping or casting of metal sheet, and its cross-sectional shape can be triangular. It is connected by a rotary shaft 5 and can rotate under the drive of external force. Specifically, when in the working position, the free end of the baffle extends into the area above the scraper disc, forming an axial block on the top edge of the scraper disc to prevent it from moving upward with the drill pipe, thereby completing the scraping action. When in the non-working position, the free end of the baffle completely exits the projection area directly above the scraper disc, making room for the radial insertion or removal of the scraper disc. The free end of the baffle can be provided with a chamfer or rounded transition to avoid scratching and damaging the scraper disc.

[0031] This application integrates the frame, scraper, synchronous drive assembly, and baffle to achieve the constraint and release process of the scraper disc, facilitating manual operation. When the scraper disc needs to be installed or replaced, the synchronous drive assembly receives a pneumatic control signal (which is connected to conventional control elements during use, and will not be described in detail here). The drive baffle rotates from the working position to the non-working position until its free end is completely detached from the area above the scraper disc. At this point, the scraper disc can be inserted into the through hole. After installation, the synchronous drive assembly reverses its action, driving the baffle back from the non-working position to the working position, and its free end re-enters the area above the scraper disc, forming an axial limit on the top of the scraper disc. When the drill pipe passes through the through hole and drives the scraper disc to move upward synchronously (the scraper disc is axially limited), the inner wall of the scraper disc continuously scrapes away the mud from the surface of the drill pipe. The mud is guided along the outer side of the scraper disc to the collection area below the drill platform, which can effectively prevent mud from contaminating other components and extend service life.

[0032] In one embodiment, such as Figure 2 As shown, in order to achieve synchronous movement of the components, the synchronous drive assembly 3 includes: Synchronous drive cylinder 301 is installed inside the assembly cavity 101 in an inclined direction; The lever 302 is installed at the piston rod end of the synchronous drive cylinder 301 as a connecting transition piece to connect the remaining area; A central pin 303 is installed at the end of the lever 302 away from the synchronous drive cylinder 301; The slide rail unit 304 is installed inside the assembly cavity 101, and the slide rail unit 304 is provided with a slide groove 305 that slides and engages with the central pin 303. The synchronous motion link 306 is mounted on the central pin 303, and the baffle 4 is mounted on the synchronous motion link 306.

[0033] Among them, the synchronous drive cylinder 301 is a single piston rod cylinder, and its cylinder body is installed inside the assembly cavity 101, with the piston rod extending towards the slide rail unit 304; the lever 302 is an L-shaped part, one end of which is hinged to the piston rod end of the synchronous drive cylinder, and the other end is connected to the central pin 303 (which can be fitted by a waist-shaped groove). The middle part of the lever 302 is rotatably installed inside the assembly cavity 101 through the lever pin 307. Thus, the push of the synchronous drive cylinder 301 can drive the lever 302 to rotate around the lever pin 307, that is, to move along the slide groove 305.

[0034] The bottom of the baffle 4 is higher than the upper surface of the lever 302, which avoids interference and ensures the stable movement of the entire synchronization mechanism.

[0035] In another embodiment, to better achieve stable movement of the lever 302, a slide rail unit 304 is designed, which includes: A lower slide rail 308 is disposed at the bottom of the assembly cavity 101; The upper slide rail 309 is installed on the side of the assembly cavity 101, and the upper slide rail 309 is located on the lower slide rail 308. The upper slide rail 309 and the lower slide rail 308 are both provided with the slide groove 305. The protective cover 310 is installed on the upper slide rail 309.

[0036] When the central pin 303 is engaged with the slide rail unit 304, it is equipped with existing components such as a copper sleeve, which will not be described in detail here. Its top extends out of the upper slide rail 309. Therefore, by providing a protective cover 310, the central pin 303 can be protected. The slide grooves 305 of the lower slide rail and the upper slide rail correspond to each other and together form a two-way limiting structure for the central pin, ensuring the stable movement of the central pin 303. By providing a protective cover, it can effectively prevent mud from entering the slide groove and hindering the sliding, thus preventing failure.

[0037] Specifically, in another embodiment, the synchronization mechanism in this application is a three-bar linkage and a three-baffle motion mechanism, forming three synchronous motion pressing points, which can ensure the stability of the pressing. Specifically, the baffle 4 is divided into a right baffle 401, a middle baffle 402 and a left baffle 403. The middle baffle 402 is located between the right baffle 401 and the left baffle 403. The baffle structures are the same, only the connecting structures that cooperate with them are different. Among them, such as Figure 2 , 7 As shown, the synchronous motion link 306 includes: The first symmetrical connecting rod 311 is mounted on the central pin 303 at one end; The first central shaft 312 is installed at the other end of the first symmetrical connecting rod 311, and the right baffle 401 is installed on the first central shaft 312; The second symmetrical connecting rod 313 is mounted on the central pin 303 at one end. That is, when the synchronous driving cylinder 301 drives the lever 302 to rotate, it can synchronously drive the first symmetrical connecting rod 311 and the second symmetrical connecting rod 313 to move. The second central shaft 314 is installed at the end of the second symmetrical connecting rod 313 away from the first symmetrical connecting rod 311, and the second central shaft 314 is equipped with the middle baffle (402) 402; Synchronous link 315, one end of which is connected to the second central shaft 314; Synchronous connecting rod pin 316 is installed at the end of synchronous connecting rod 315 away from the second symmetrical connecting rod 313, and the left baffle 403 is installed on synchronous connecting rod pin 316.

[0038] Specifically, in the working position, preferably, the right baffle 401, the middle baffle 402 and the left baffle 403 are blocks evenly distributed at 120° along the circumference of the scraper disc, and the material of these blocks is not specifically limited in this embodiment of the application; each baffle 4 is rotatably installed inside the frame via a rotating shaft 5, and the free ends of each baffle together form an approximately circular limiting ring when in the working position, which is used to support and constrain the radial floating of the scraper disc.

[0039] Among them, the first symmetrical connecting rod 311, the second symmetrical connecting rod 313 and the synchronous connecting rod 315 are arc-shaped rods. The second symmetrical connecting rod 313 is symmetrical to the first symmetrical connecting rod 311 about the center line of the slide groove 305, and the length of the second symmetrical connecting rod 313 is less than the length of the synchronous connecting rod 315.

[0040] Through the above technical solution, this embodiment achieves a three-point constraint around the sludge scraper disc by setting the right baffle, middle baffle and left baffle to be separate and symmetrically distributed in space, thus avoiding the instability caused by single point or two point support due to eccentric load. Since the first symmetrical connecting rod and the second symmetrical connecting rod are symmetrically arranged about the center line of the slide groove, the right baffle and the middle baffle have the same rotation angle and opposite direction, which can ensure the stability of the sludge scraper disc during installation, positioning, floating and stress.

[0041] To further ensure the synchronization of the direction and angle of the baffle rotation, such as Figure 5 As shown, in this application, the length of the line connecting the center of the first central shaft 312 and the center of the central pin 303 is L1, and the length of the line connecting the center of the second central shaft 314 and the center of the central pin 303 is L2, where L1 = L2. The center of the rotating shaft 5 on the middle baffle 402, the center of the rotating shaft 5 on the left baffle 403, the center of the synchronous connecting rod pin 316, and the center of the second central shaft 314 are connected in sequence to form a parallelogram.

[0042] Specifically, the length L1 of the line connecting the center of the first central axis and the center of the central pin can refer to the geometric distance between the connection points at both ends of the first symmetrical link. The specific value is not specifically limited in this embodiment. Similarly, L2 is also like this. Through this design, the motion symmetry of the right baffle 401 and the middle baffle 402 can be achieved. The center of the rotation axis on the middle baffle, the center of the rotation axis on the left baffle, the center of the synchronous link pin, and the center of the second central axis are connected in sequence to form a parallelogram. This can refer to the fact that the closed quadrilateral formed by the above four points on the spatial projection plane satisfies the geometric relationship that opposite sides are parallel and equal. The parallelogram structure can be a rectangle, a rhombus, or an arbitrary oblique parallelogram. The parallelogram formed by these four points is the structural basis for the synchronous link mechanism to realize the same-direction and equal-angle rotation of the middle baffle and the left baffle, thus ensuring the synchronicity of the movement of the three baffles.

[0043] In another embodiment, the second central shaft 314 in this application rotates frequently and requires lubrication. Therefore, the second central shaft 314 is designed to have an axial oil passage 317 and a plurality of radial flow passages 318. The radial flow passages 318 are connected and cooperate with the axial oil passages 317. An oil nozzle 319 is connected to the side of the second central shaft 314.

[0044] The second central shaft 314 in this application is also equipped with conventional components such as copper sleeves (copper sleeves are installed between the shaft and the rod in this application), which will not be described in detail here. The second central shaft 314 in this application rotates frequently as needed, so grease needs to be added for lubrication. Compared with the existing top-addition method, this application adopts the side-addition method, that is, the grease enters into the axial oil passage 317 through the grease nipple 319, and then flows out from the radial flow passage 318 to lubricate the copper sleeve. Because this application is installed below the slip, it is not convenient to add lubricating oil from the top, so the side-addition method is provided.

[0045] In yet another embodiment, such as Figure 1 As shown, in order to prevent the baffle 4 from moving too far, a groove 404 is provided at the free end of the baffle 4; The assembly cavity 101 is provided with a first limiting block 103 and a second limiting block 104, which are located on both sides of the rotation path of the baffle, respectively, to limit the working position and the non-working position. Specifically, when the baffle moves to the working position, the first limiting block 103 consists of three blocks, which respectively contact and cooperate with the sides of the left, middle and right baffles to complete the limiting; when the baffle moves to the non-working position, the second limiting block 104 consists of three blocks, which are located on the inner side of the assembly cavity and respectively contact and cooperate with the ends of the left, middle and right baffles to complete the limiting.

[0046] In another embodiment, this application is installed in the space formed by the lower part of the slip or the turntable beam to achieve downward sludge scraping. Therefore, the frame 1 in this application is provided with multiple fixing units 6 inside. like Figure 4 As shown, the fixing unit 6 includes: A fixing base 601 is provided with a cavity 602 inside, and the fixing base 601 is disposed in the assembly cavity 101; A fixing bolt 603 is disposed in the cavity 602, and the top of the fixing bolt 603 extends out of the cavity 602; An anti-loosening plug 604 is disposed in the cavity 602, and the top of the anti-loosening plug 604 mates with the bottom of the fixing bolt 603; A brake bolt 605 passes through the anti-loosening plug 604 from the outside of the frame 1, and a cotter pin 606 is installed at the end of the brake bolt 605 located in the assembly cavity 101 for fixing.

[0047] Specifically, the bottom of the fixing bolt is provided with an internal hexagon countersunk hole, while the top of the anti-loosening plug is provided with an external hexagon head protrusion. At the same time, the anti-loosening plug 604 has a transverse through hole to facilitate the braking bolt 605. In order to further prevent the anti-loosening plug 604 from rotating, an external hexagon head protrusion is provided at the bottom of the assembly cavity 101, and the bottom of the anti-loosening plug is provided with a matching internal hexagon countersunk hole, which can ensure the overall stability.

[0048] Further explanation of the usage process of this application: S1: Install this device by using multiple fixing bolts 603 to install this application to the bottom of the power slip 8, or install it inside the turntable support beam. There is a notch in the frame (integrated connecting plate) to meet the installation requirements when the drill pipe 7 is in the wellhead. S2: Start the synchronous drive assembly 3, rotate the opening baffle 4 to open the installation space for the scraper disc 2; Action process: The synchronous drive cylinder 301 drives the lever 302 to move the central pin 303. The central pin 303 pulls the first and second symmetrical connecting rods that are symmetrical on the left and right to move backward along the slide groove 305. The first and second symmetrical connecting rods pull the right baffle and the middle baffle to move symmetrically (rotating synchronously in opposite directions) through the central shaft. The right baffle 401 and the middle baffle 402 rotate to the second limit block 104 near the side of the frame 1. At the same time, the second central shaft drives the synchronous connecting rod. The synchronous connecting rod drives the left baffle 403 to move synchronously in the same direction through the synchronous connecting rod pin on the left baffle. The left baffle 403 rotates to the second limit block 104 near the side of the frame, completing the action of the three baffles opening the installation space for the scraper disc; S3: Lower the scraper disc into frame 1 via the drill rod; S4: Rotate the three baffles to the working position, that is, the baffles block the scraper disc from moving upward with the drill rod during the scraping process, thus realizing the scraping function of the scraper disc. Action process: Synchronous drive cylinder 301 moves the central pin 303 through the lever 302. The central pin 303 pulls the first and second symmetrical connecting rods to move forward along the slide groove 305. Similarly, the three subsequent baffles rotate to above the scraper disc, completing the action of the three baffles blocking the upward movement of the scraper disc.

[0049] Specifically, the principle for achieving symmetrical movement between the right and middle baffles is as follows: the first and second symmetrical connecting rods are connected by copper sleeves, and the center distances from the first and second central shafts to the connecting pins of the right and left baffles are equal. At the same time, the center line of motion of the central pin is on the symmetrical plane of the right and middle baffles. This ensures that the central pin pulls the first and second symmetrical connecting rods, simultaneously driving the right and middle baffles to rotate by the same angle, thus achieving symmetrical movement.

[0050] The principle for achieving synchronous movement of the middle baffle and the left baffle: The two points at the center of the rotation shaft and the center of the second central shaft on the middle baffle, together with the two points at the center of the rotation shaft and the center of the synchronous connecting rod pin on the left baffle, form a parallelogram. This parallelogram has the characteristic of synchronous horizontal rotation, which ensures that the rotation angle of the middle baffle is always the same as that of the left baffle, and that their directions are consistent.

[0051] The lubricating oil is specially designed with a flow path that runs from the lubricating oil nozzle channel to the axial oil channel, then to the radial channel of the pin shaft, and finally to the radial channel, lubricating the second central shaft 314 and the two upper and lower copper bushings to ensure the lubricating oil is applied in a horizontal position.

[0052] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification. In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A symmetrical synchronous cylinder-driven baffle scraping device, characterized in that, include: The frame (1) has an assembly cavity (101) inside, and a through hole (102) for the drill rod (7) to pass through is opened at the bottom of the frame (1). The sludge scraper (2) is installed at the bottom of the assembly cavity (101), and its position corresponds to the through hole (102); Synchronous drive assembly (3) is installed inside the assembly cavity (101); A baffle (4) is installed on the movable end of the synchronous drive assembly (3). The synchronous drive assembly (3) drives the baffle (4) to rotate, so that the baffle (4) switches between a working position that covers the sludge scraper (2) and a non-working position that is away from the sludge scraper (2).

2. The symmetrical synchronous cylinder-driven baffle scraping device according to claim 1, characterized in that, The synchronous drive component (3) includes: Synchronous drive cylinder (301) is installed inside the assembly cavity (101); A lever (302) is mounted on the piston rod end of the synchronous drive cylinder (301); A central pin (303) is installed at the end of the lever (302) away from the synchronous drive cylinder (301); The slide rail unit (304) is installed inside the assembly cavity (101), and the slide rail unit (304) is provided with a slide groove (305) that slides and engages with the central pin (303). The synchronous motion link (306) is mounted on the central pin (303), and the baffle (4) is mounted on the synchronous motion link (306).

3. The symmetrical synchronous cylinder-driven baffle scraping device according to claim 2, characterized in that, The lever (302) is L-shaped, and the middle part of the lever (302) is rotatably mounted inside the assembly cavity (101) via the lever pin (307); The baffle (4) is installed inside the frame (1) via a rotating shaft (5), and the bottom of the baffle (4) is higher than the upper surface of the lever (302).

4. The symmetrical synchronous cylinder-driven baffle scraping device according to claim 2, characterized in that, The slide rail unit (304) includes: A lower slide rail (308) is disposed at the bottom of the assembly cavity (101); The upper slide rail (309) is installed on the side of the assembly cavity (101), and the upper slide rail (309) is located on the lower slide rail (308). The upper slide rail (309) and the lower slide rail (308) are both provided with the slide groove (305). The protective cover (310) is installed on the upper slide rail (309).

5. The symmetrical synchronous cylinder-driven baffle scraping device according to claim 2, characterized in that, The baffle (4) is divided into a right baffle (401), a middle baffle (402) and a left baffle (403), with the middle baffle (402) located between the right baffle (401) and the left baffle (403); The synchronous motion link (306) includes: The first symmetrical connecting rod (311) is mounted on the central pin (303) at one end; The first central shaft (312) is installed at the other end of the first symmetrical connecting rod (311), and the right baffle (401) is installed on the first central shaft (312). The second symmetrical connecting rod (313) is mounted on the central pin (303) at one end; The second central shaft (314) is installed at the end of the second symmetrical link (313) away from the first symmetrical link (311), and the second central shaft (314) is equipped with the middle baffle (402). Synchronous link (315), one end of which is connected to the second central shaft (314); Synchronous link pin (316) is installed at the end of the synchronous link (315) away from the second symmetrical link (313), and the left baffle (403) is installed on the synchronous link pin (316).

6. The symmetrical synchronous cylinder-driven baffle scraping device according to claim 5, characterized in that, The first symmetrical link (311), the second symmetrical link (313) and the synchronous link (315) are all arc-shaped links. The second symmetrical link (313) is symmetrical to the first symmetrical link (311) about the center line of the slide (305), and the length of the second symmetrical link (313) is less than the length of the synchronous link (315).

7. The symmetrical synchronous cylinder-driven baffle scraping device according to claim 6, characterized in that, The length of the line connecting the center of the first central shaft (312) and the center of the central pin (303) is L1, and the length of the line connecting the center of the second central shaft (314) and the center of the central pin (303) is L2, where L1 = L2; The center of the rotating shaft (5) on the middle baffle (402), the center of the rotating shaft (5) on the left baffle (403), the center of the synchronous connecting rod pin (316), and the center of the second central shaft (314) are connected in sequence to form a parallelogram.

8. The symmetrical synchronous cylinder-driven baffle scraping device according to claim 5, characterized in that, The second central shaft (314) has an axial oil passage (317) and a plurality of radial flow passages (318), the radial flow passages (318) are connected and cooperate with the axial oil passages (317), and the side of the second central shaft (314) is connected to an oil nozzle (319).

9. The symmetrical synchronous cylinder-driven baffle scraping device according to claim 1, characterized in that, The free end of the baffle (4) is provided with a groove (404). The assembly cavity (101) is provided with a first limiting block (103) and a second limiting block (104), which are located on both sides of the rotation path of the baffle (4) to limit the working position and the non-working position.

10. The symmetrical synchronous cylinder-driven baffle scraping device according to claim 1, characterized in that, The frame (1) is equipped with multiple fixed units (6); The fixing unit (6) includes: A fixing seat (601) has a cavity (602) inside, and the fixing seat (601) is disposed in the assembly cavity (101); A fixing bolt (603) is disposed in the cavity (602), and the top of the fixing bolt (603) extends out of the cavity (602). An anti-loosening plug (604) is disposed in the cavity (602), and the top of the anti-loosening plug (604) is engaged with the bottom of the fixing bolt (603); Brake bolt (605) passes through the anti-loosening plug (604) from the outside of the frame (1).

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