An inner wall polishing device for oil casing machining

Abstract

The application relates to the field of inner wall polishing technology for oil casing machining, and discloses an inner wall polishing device for oil casing machining, which comprises a base, four supporting legs fixedly connected to the top of the base, and the following polishing components: the polishing components comprise a sliding hole plate, the bottom of the sliding hole plate is fixedly connected to the top of the supporting leg, the end of the sliding hole plate is fixedly connected with a control box, and the upper surface of the control box is connected with a limiting frame. Once the moving frame one is moved through the linkage of the hydraulic rod one, the moving frame two is synchronously displaced, the moving frame two pushes the center frame through the hydraulic rod two to feed in the same direction, three groups of bearing mechanisms are completely unified in movement pace, casing clamping loosening caused by the asynchronous movement of the two moving frames is completely eliminated, the stability of the feeding process of the super-long oil casing is greatly improved, the moving frame one and the moving frame two are symmetrically arranged with the center frame as the center, the top of each is provided with a fixed frame, the two fixed frames are used for synchronously limiting the two ends of the oil casing and uniformly dispersing the weight of the casing.

Description

Technical Field

[0001] This invention relates to the field of inner wall polishing technology for oil casing processing, specifically to an inner wall polishing device for oil casing processing. Background Technology

[0002] Oil casing is a large-diameter seamless steel pipe specifically designed for oil and gas drilling and production. It is a core pressure-bearing and support component of oil and gas wells. After being run into the wellbore, it is permanently cemented for pressure protection. Downhole, it withstands the combined loads of tension, compression, bending, torsion, and high-pressure oil and gas media for a long time, creating a closed pressure barrier for oil and gas production. After hot rolling, the inner wall of the oil casing will have residual oxide scale, rolling burrs, tool marks, and local unevenness. If the inner wall is rough and uneven, crude oil and formation impurities can easily adhere to the pits in the pipe wall, forming deposits and increasing fluid transport resistance. Therefore, the inner wall must be polished during the casing finishing stage to remove microscopic defects and uniformly improve the smoothness of the inner wall. When processing long oil casings, existing oil casing inner wall polishing equipment relies solely on clamping and limiting points at both ends of the casing. The casing's own weight causes the middle section to sag and deform. When the casing rotates at high speed with the chuck, the bent part of the casing will continuously generate large radial runout. The contact pressure between the grinding head and the inner wall of the casing fluctuates continuously, resulting in inconsistent grinding texture depth on the inner wall of the casing. The surface finish is difficult to meet the oilfield casing precision machining standards, leading to a high rate of scrap. Summary of the Invention

[0003] The purpose of this invention is to provide an inner wall polishing device for oil casing processing, so as to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to an inner wall polishing device for oil casing processing, comprising a base, four support legs fixedly connected to the top of the base, and further comprising: A polishing component, comprising a sliding plate, the bottom of which is fixedly connected to the top of a support leg, and a control box fixedly connected to the end of the sliding plate, the upper surface of which is connected to a limit frame; The feeding component includes a movable frame one and a movable frame two. The center surfaces of the movable frame one and the movable frame two are slidably connected to the inner wall of the sliding plate. Fixed frames are respectively installed on the top of the movable frame one and the top of the movable frame two. A stabilizing component, the stabilizing component including a sliding ring, the inner wall of the sliding ring being rotatably connected to a sleeve, and the inner wall of the sleeve being fitted with a protective pad; A vacuuming component, comprising a mounting bracket, an adjusting bracket being threadedly connected to the surface of the mounting bracket, a rear cover being rotatably connected to the end of the adjusting bracket away from the mounting bracket, and a conical filter bracket being inserted into the inner wall of the rear cover.

[0005] Furthermore, the polishing component includes a hollow shaft, a mounting base fixedly connected to the surface of the hollow shaft, a polishing block inserted into the inner wall of the mounting base, and the polishing block and the mounting base being detached and installed via screws. A fitting frame is fixedly connected to the surface of the hollow shaft, a rubber block is inserted into the inner wall of the fitting frame, and several air holes are formed on the surface of the hollow shaft. The end of the hollow shaft extends into the interior of the control box, a sliding rectangular frame is fixedly connected to the inner wall of the control box, a support ring is slidably connected to the inner wall of the sliding rectangular frame, the inner wall of the support ring is rotatably connected to the surface of the hollow shaft, and a positioning groove is formed on the inner wall of the limiting frame. The inner wall of the limiting frame slides... A cylindrical frame is connected, and a slider is fixedly connected to the surface of the cylindrical frame. The surface of the slider is slidably connected to the inner wall of the positioning groove. A gear is fixedly connected to the surface of the hollow shaft, and a bracket is rotatably connected to the surface of the hollow shaft. A driving device is installed on the inner wall of the bracket, and a driving wheel is fixedly connected to the output end of the driving device. A linkage frame is slidably connected to the inner wall of the sliding groove rectangular frame, and the end of the linkage frame is fixedly connected to the surface of the bracket. An electric actuator is fixedly connected to the surface of the linkage frame, and the end of the electric actuator away from the linkage frame is fixedly connected to the inner wall of the control box. A sealing plate is fixedly connected to the end of the cylindrical frame, and a top cover is hinged to the top of the control box.

[0006] Furthermore, the surface of the hollow shaft is rotatably connected to the inner wall of the cylindrical frame, the surface of the drive wheel meshes with the surface of the gear, the surface of the cylindrical frame contacts the inner wall of the limiting frame, the end of the sealing plate near the cylindrical frame contacts the surface of the limiting frame, two sliders are provided, the two sliders are symmetrically arranged vertically around the cylindrical frame, and the upper and lower surfaces of the support ring are slidably connected to the inner wall of the sliding groove rectangular frame.

[0007] Furthermore, the feeding component includes a rotating ring, the end of which is rotatably connected to the inner wall of the fixed frame. A gear ring is fixedly connected to the surface of the rotating ring. A power device is fixedly connected to the inner wall of the fixed frame. A meshing wheel is fixedly connected to the output end of the power device. A three-jaw chuck is installed at the end of the rotating ring away from the fixed frame. A central frame is slidably connected to the inner wall of the sliding plate. A telescopic arc frame is fixedly connected to the top of the central frame. A threaded telescopic rod is rotatably connected to the top of the central frame. The top of the threaded telescopic rod is connected to the surface of the telescopic arc frame. The inner wall of the telescopic arc frame is rotatably connected to the surface of the sliding plate. A motor is installed at the bottom of the sliding plate, and a threaded rod is fixedly connected to the output end of the motor. A screw hole frame is fixedly connected to the bottom of the first movable frame, and the inner wall of the screw hole frame is threadedly connected to the surface of the threaded rod. A hydraulic rod is fixedly connected to the lower surface of the first movable frame, and the telescopic end of the first hydraulic rod is fixedly connected to the lower surface of the second movable frame. A hydraulic rod is fixedly connected to the lower surface of the central frame, and the end of the second hydraulic rod away from the central frame is fixedly connected to the lower surface of the second movable frame.

[0008] Furthermore, the upper and lower ends of the first movable frame, the second movable frame, and the central frame all extend to the outer end of the sliding plate. The first movable frame and the second movable frame are symmetrically arranged with the central frame as the center. The oil casing is held inside the three-jaw chuck, and multiple rollers inside the telescopic arc frame are in contact with the bottom surface of the oil casing.

[0009] Furthermore, the end of the three-jaw chuck near the rotating ring contacts the inner wall of the fixed frame, and the end of the three-jaw chuck away from the rotating ring extends to the outer end of the fixed frame, and the surface of the gear ring meshes with the surface of the meshing wheel.

[0010] Furthermore, the stabilizing component includes a connecting plate, the end of which is fixedly connected to the surface of the fixing frame, and the end of the connecting plate away from the fixing frame is fixedly connected to the stabilizing frame. Limiting grooves are provided on both the upper and lower inner walls of the stabilizing frame, and an electric push rod II is fixedly connected to the inner wall of the stabilizing frame. The telescopic end of the electric push rod II is fixedly connected to the surface of the sliding ring.

[0011] Furthermore, the upper and lower surfaces of the sliding ring respectively contact the inner walls of the two limiting grooves, the end of the sleeve contacts the inner wall of the limiting groove, and the end of the hollow shaft away from the control box extends into the interior of the sleeve and contacts the inner wall of the protective pad.

[0012] Furthermore, the dust collection component includes an air inlet pipe, the surface of which is rotatably connected to the inner wall of the hollow shaft, a fixed pipe connected to the end of the air inlet pipe, the end of the fixed pipe away from the air inlet pipe being connected to the end of the mounting bracket, an air pump mounted on the top of the base, a flexible hose connected to the air inlet of the air pump, the end of the flexible hose away from the air pump being connected to the rear cover, a slanted rack connected to the bottom of the mounting bracket, and a storage rack threadedly connected to the bottom of the slanted rack.

[0013] Furthermore, the end of the conical filter frame away from the rear cover extends into the interior of the mounting bracket, and the conical end of the conical filter frame is located above the inclined slot frame. The end of the fixed tube away from the air intake pipe passes through the control box and extends to the outer end of the control box.

[0014] The present invention has the following beneficial effects: This invention features a sliding plate fixedly mounted on the top of the support leg. An integrated long groove track simultaneously constrains the linear sliding of the first moving frame, the second moving frame, and the central frame, ensuring coaxiality between the oil casing and the hollow shaft throughout the process and preventing casing misalignment. The mounting base allows for the detachable assembly of grinding blocks via screws, enabling operators to change grinding blocks of different grit sizes according to the oil casing's inner wall processing requirements. Rubber blocks embedded in the fitting frame rotate synchronously at high speed with the hollow shaft, continuously scraping away metal debris falling from the casing wall during polishing, preventing debris from adhering to the casing wall and forming deep or shallow scratches. Evenly spaced air holes on the shaft penetrate the inner cavity of the shaft, working in conjunction with the rear-end dust extraction component to continuously remove debris with negative pressure, preventing debris from getting stuck between the grinding block and the casing's inner wall and scratching the workpiece. The drive device, drive wheel, and gears form a rigid gear pair transmission, ensuring the entire transmission mechanism is securely installed. Mounted on the bracket, it can move axially synchronously with the hollow shaft, maintaining coaxial power transmission throughout the process. It will not cause transmission misalignment due to shaft extension and contraction, ensuring a consistent polishing speed for the entire inner wall of the long casing. When the electric actuator pulls, the linkage frame drives the hollow shaft to extend and contract as a whole. It can be adapted to the processing of oil casings with different inner diameters and lengths. The support ring, which is slidably assembled inside the sliding rectangular frame, supports the hollow shaft throughout the process, offsetting the sagging deformation caused by the weight of the slender shaft itself. At the same time, the cylindrical frame slides synchronously along the positioning groove of the limit frame by relying on the upper and lower symmetrical sliders, forming a double-point support structure for the hollow shaft with the support ring. This completely solves the problem of radial shaking of the shaft during polishing feed. The sealing plate at the end of the cylindrical frame moves synchronously with the shaft, continuously fitting against the end face of the limit frame to form a dynamic sealing cavity, preventing polishing chips from entering the control box.

[0015] This invention's feeding component integrates automatic synchronous feeding of oil casing, clamping at both ends, and auxiliary support in the middle section. A bottom motor drives a threaded rod to rotate, which in turn drives a movable frame one to slide linearly along a sliding plate via a threaded hole bracket. Movable frame one is linked to movable frame two via a hydraulic rod one for synchronous displacement. Movable frame two then pushes the central frame forward in the same direction via another hydraulic rod two. The three sets of supporting mechanisms move in perfect unison, completely eliminating casing clamping loosening caused by asynchronous movement of the two movable frames, significantly improving the stability of feeding ultra-long oil casing. Movable frames one and two are symmetrically arranged around the central frame, with fixed frames installed at the top. The double-sided fixed frames synchronously limit the movement of both ends of the oil casing, evenly distributing the casing's weight and preventing bending deformation caused by single-point clamping on one side. The two sets of movable frames can be independently adjusted and slid. The clamping spacing can be adjusted synchronously via a hydraulic structure, allowing for flexible adjustment of the clamping positions at both ends of oil casings of different lengths and outer diameters. The power unit inside the fixed frame outputs a meshing wheel that meshes with the outer gear ring of the rotating ring, driving the rotating ring and the front three-jaw chuck to rotate at a uniform speed. The three-jaw chuck adaptively centers and clamps the oil casing, making the casing rotation direction opposite to the polishing direction of the hollow shaft, forming a relatively high-speed cutting and grinding motion, significantly improving the efficiency and uniformity of inner wall polishing. The center frame is located between the two sets of fixed frames, and the height of the telescopic arc frame can be precisely adjusted via a threaded telescopic rod. Multiple freely rotating rollers are mounted on the inner side of the arc frame, which closely fit the bottom of the oil casing to form a flexible support in the middle section, offsetting the eccentricity problem caused by the gravity of the middle section of the long casing.

[0016] This invention's stabilizing component feeds synchronously with the oil casing, providing limiting support for the front end of the hollow shaft. This solves the problem of the slender polishing shaft's distal end swaying in mid-air. The connecting plate fixes the stabilizing frame to the side of the fixed frame, allowing it to move synchronously with the casing feed without requiring separate positioning adjustments. The electric push rod inside the stabilizing frame can precisely pull the sliding ring to slide smoothly laterally along the upper and lower limiting grooves. The sliding ring has a rotating sleeve inside, and a flexible protective pad is fitted onto the inner wall of the casing. When the hollow shaft feeds into the oil casing, the front end of the shaft simultaneously penetrates the inner cavity of the casing. The protective pad fills the gap between the shaft and the casing, buffering the contact friction between them. The casing forms a ring-shaped limiting support for the front end of the hollow shaft. This, together with the rear support ring and cylindrical frame inside the polishing component, constitutes a two-way support system for the hollow shaft, completely eliminating the radial runout and swaying phenomenon at the distal end during polishing operations of the slender hollow shaft, and improving the smoothness of the inner wall of the oil casing.

[0017] This invention's dust collection component synchronously collects metal dust generated during polishing, combining dust removal, slag filtering, and centralized collection functions. The air pump on the base continuously outputs negative pressure suction, and the airflow is sequentially delivered to the air inlet pipe through a flexible hose and a fixed pipe. The air inlet pipe is rotatably mounted inside the hollow shaft and rotates synchronously with the hollow shaft without obstructing the negative pressure airflow path. Metal debris generated during polishing is instantly drawn into the pipe through the densely distributed pores on the surface of the hollow shaft under negative pressure, achieving synchronous dust collection. This avoids the diffusion and pollution of the workshop environment by large amounts of metal dust, improving working conditions for operators. Furthermore, it prevents debris from accumulating and adhering to the inner wall of the oil casing and the surface of the polishing block, ensuring the smooth operation of the polishing process. The optical processing is continuous and stable. After the dust-laden airflow mixed with metal debris is delivered to the inside of the mounting frame, the conical filter frame intercepts and filters the airflow. The metal debris is isolated on the outside of the filter frame, and the clean airflow passes through the filter frame and is discharged outward. The intercepted debris slides naturally down the inclined surface of the conical filter frame to the inclined slot frame, and finally collects in the storage rack connected by threads at the bottom of the inclined slot frame for centralized storage, realizing solid-gas separation. The mounting frame and the adjustment frame are connected by threads. The end of the adjustment frame can be rotated to open the back cover, which makes it convenient for operators to quickly remove the conical filter frame to clean the accumulated dust and replace the filter element. The storage rack has a detachable threaded structure. When the dust is full, it can be directly unscrewed to pour out the waste residue. The entire dust treatment structure is easy to disassemble and assemble.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the overall structure of the polishing component of the present invention; Figure 4 For the present invention Figure 3 Enlarged diagram of part A in the diagram; Figure 5 This is another schematic diagram of the polishing component of the present invention; Figure 6 This is a cross-sectional view of the control box of the present invention; Figure 7 This is a schematic diagram of the positioning groove structure of the present invention; Figure 8This is a schematic diagram of the overall structure of the feeding component of the present invention; Figure 9 This is another structural schematic diagram of the feeding component of the present invention; Figure 10 This is a schematic cross-sectional view of the fixing frame of the present invention; Figure 11 This is a schematic diagram of the overall structure of the stabilizing component of the present invention; Figure 12 This is another structural schematic diagram of the stabilizing component of the present invention; Figure 13 This is a schematic diagram of the overall structure of the dust collection component of the present invention; Figure 14 This is another structural schematic diagram of the dust collection component of the present invention; Figure 15 This is a cross-sectional view of the mounting bracket of the present invention.

[0021] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Base; 2. Support leg; 3. Oil casing; 4. Polishing component; 5. Feeding component; 6. Stabilizing component; 7. Dust collection component; 10. Control box; 11. Top cover; 12. Limiting frame; 13. Sliding plate; 14. Hollow shaft; 15. Air hole; 16. Mounting seat; 17. Grinding block; 18. Fitting frame; 19. Rubber block; 20. Slide rectangular frame; 21. Support ring; 22. Drive wheel; 23. Slider; 24. Cylindrical frame; 25. Sealing plate; 26. Gear; 27. Drive device; 28. Bracket; 29. ​​Linkage frame; 30. Electric actuator; 31. Positioning groove; 40. Moving frame; 41. Center frame; 42. Moving frame II; 43. Threaded telescopic rod; 44. Telescopic arc frame; 45. Roller; 46. Gear ring; 47. Fixing frame; 48. Three-jaw chuck; 49. Screw hole frame; 50. Threaded rod; 51. Hydraulic rod one; 52. Hydraulic rod two; 53. Power unit; 54. Meshing wheel; 55. Rotating ring; 56. Motor; 60. Connecting plate; 61. Stabilizing frame; 62. Limiting groove; 63. Protective pad; 64. Sleeve; 65. Sliding ring; 66. Electric actuator two; 70. Air pump; 71. Hoses; 72. Fixing pipe; 73. Air inlet pipe; 74. Mounting frame; 75. Storage rack; 76. Adjusting frame; 77. Rear cover; 78. Conical filter frame; 79. Inclined groove frame. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-15 As shown, the present invention is an inner wall polishing device for oil casing processing, including a base 1, four support legs 2 fixedly connected to the top of the base 1, and further including: Polishing component 4 includes a sliding plate 13. The bottom of the sliding plate 13 is fixedly connected to the top of the support leg 2. The end of the sliding plate 13 is fixedly connected to a control box 10. The upper surface of the control box 10 is connected to a limit frame 12. The feeding component 5 includes a first movable frame 40 and a second movable frame 42. The center surfaces of the first movable frame 40 and the second movable frame 42 are slidably connected to the inner wall of the sliding plate 13. The top of the first movable frame 40 and the top of the second movable frame 42 are respectively equipped with a fixed frame 47. The stabilizing component 6 includes a sliding ring 65, the inner wall of which is rotatably connected to a sleeve 64, and the inner wall of the sleeve 64 is fitted with a protective pad 63. The vacuuming component 7 includes a mounting bracket 74, an adjusting bracket 76 is threadedly connected to the surface of the mounting bracket 74, a rear cover 77 is rotatably connected to the end of the adjusting bracket 76 away from the mounting bracket 74, and a conical filter bracket 78 is inserted into the inner wall of the rear cover 77.

[0024] The polishing component 4 includes a hollow shaft 14, a mounting base 16 fixedly connected to the surface of the hollow shaft 14, a polishing block 17 inserted into the inner wall of the mounting base 16, and the polishing block 17 and the mounting base 16 being detached and installed via screws. A fitting frame 18 is fixedly connected to the surface of the hollow shaft 14, a rubber block 19 is inserted into the inner wall of the fitting frame 18, and several air holes 15 are opened on the surface of the hollow shaft 14. The end of the hollow shaft 14 extends into the interior of the control box 10, a sliding rectangular frame 20 is fixedly connected to the inner wall of the control box 10, and a support ring 2 is slidably connected to the inner wall of the sliding rectangular frame 20. 1. The inner wall of the support ring 21 is rotatably connected to the surface of the hollow shaft 14. The inner wall of the limiting frame 12 is provided with a positioning groove 31. A cylindrical frame 24 is slidably connected to the inner wall of the limiting frame 12. A slider 23 is fixedly connected to the surface of the cylindrical frame 24. The surface of the slider 23 is slidably connected to the inner wall of the positioning groove 31. A gear 26 is fixedly connected to the surface of the hollow shaft 14. A bracket 28 is rotatably connected to the surface of the hollow shaft 14. A driving device 27 is installed on the inner wall of the bracket 28. A driving wheel 22 is fixedly connected to the output end of the driving device 27. The inner wall of the sliding rectangular frame 20 is slidably connected to... A linkage frame 29 is provided, with its end fixedly connected to the surface of a bracket 28. An electric actuator 30 is fixedly connected to the surface of the linkage frame 29, with the end of the electric actuator 30 away from the linkage frame 29 fixedly connected to the inner wall of the control box 10. A sealing plate 25 is fixedly connected to the end of a cylindrical frame 24. A top cover 11 is hinged to the top of the control box 10. A grinding block 17 is detachably mounted on the mounting base 16 via a screw. Operators can replace grinding blocks of different grit sizes according to the processing requirements of the inner wall of the oil casing 3. A rubber block 19 embedded in the fitting frame 18 rotates synchronously at high speed with the hollow shaft 14, polishing the surface. During the process, metal debris falling off the tube wall is continuously scraped to prevent it from adhering to the tube wall and forming deep and shallow scratches. The air holes 15 evenly opened on the rod body pass through the inner cavity of the shaft, and the dust suction component 7 at the rear end sucks away the debris in real time with negative pressure, preventing the debris from getting stuck between the polishing block 17 and the inner wall of the sleeve and scratching the workpiece. The drive device 27, drive wheel 22 and gear 26 form a rigid gear pair transmission. The entire transmission mechanism is installed on the bracket 28 and can move axially synchronously with the hollow shaft 14. The power transmission remains coaxial throughout the process and will not cause transmission misalignment due to shaft extension and contraction, ensuring that the polishing line speed of the entire inner wall of the long sleeve is consistent.

[0025] The surface of the hollow shaft 14 is rotatably connected to the inner wall of the cylindrical frame 24, the surface of the drive wheel 22 meshes with the surface of the gear 26, the surface of the cylindrical frame 24 contacts the inner wall of the limiting frame 12, the end of the sealing plate 25 near the cylindrical frame 24 contacts the surface of the limiting frame 12, there are two sliders 23, the two sliders 23 are symmetrically arranged vertically around the cylindrical frame 24, and the upper and lower surfaces of the support ring 21 are slidably connected to the inner wall of the sliding groove rectangular frame 20.

[0026] The feeding component 5 includes a rotating ring 55, the end of which is rotatably connected to the inner wall of the fixed frame 47. A gear ring 46 is fixedly connected to the surface of the rotating ring 55. A power unit 53 is fixedly connected to the inner wall of the fixed frame 47. A meshing wheel 54 is fixedly connected to the output end of the power unit 53. A three-jaw chuck 48 is installed at the end of the rotating ring 55 away from the fixed frame 47. A center frame 41 is slidably connected to the inner wall of the sliding plate 13. A telescopic arc frame 44 is fixedly connected to the top of the center frame 41. A threaded telescopic rod 43 is rotatably connected to the top of the center frame 41. The top of the threaded telescopic rod 43 is fixedly connected to the surface of the telescopic arc frame 44. Multiple rollers 45 are rotatably connected to the inner wall of the telescopic arc frame 44. A motor 56 is installed at the bottom of the sliding plate 13. A threaded rod 50 is fixedly connected to the output end of the motor 56. A screw hole frame 49 is fixedly connected to the bottom of the moving frame 40. The inner wall of the screw hole frame 49 is connected to the threaded rod 50. The surface is threaded, and the lower surface of the moving frame 40 is fixedly connected to the hydraulic rod 51. The telescopic end of the hydraulic rod 51 is fixedly connected to the lower surface of the moving frame 42. The lower surface of the center frame 41 is fixedly connected to the hydraulic rod 52. The end of the hydraulic rod 52 away from the center frame 41 is fixedly connected to the lower surface of the moving frame 42. The feeding component 5 realizes the integrated operation of automatic synchronous feeding of oil casing 3, clamping at both ends, and auxiliary support in the middle section. The bottom motor 56 drives the threaded rod 50 to rotate, and drives the moving frame 40 to slide linearly along the sliding plate 13 through the screw hole frame 49. The moving frame 40 is linked by the hydraulic rod 51 to move the moving frame 42 synchronously. The moving frame 42 then pushes the center frame 41 to feed in the same direction through the hydraulic rod 52. The movement of the three sets of bearing mechanisms is completely unified, which completely eliminates the casing clamping loosening caused by the asynchronous movement of the moving frames on both sides, and greatly improves the stability of the feeding process of ultra-long oil casing.

[0027] The upper and lower ends of the first movable frame 40, the second movable frame 42 and the central frame 41 all extend to the outer end of the sliding plate 13. The first movable frame 40 and the second movable frame 42 are symmetrically arranged with the central frame 41 as the center. The oil casing 3 is held in the internal clamp of the three-jaw chuck 48. Multiple rollers 45 inside the telescopic arc frame 44 are in contact with the bottom surface of the oil casing 3.

[0028] The end of the three-jaw chuck 48 near the rotating ring 55 contacts the inner wall of the fixed frame 47, and the end of the three-jaw chuck 48 away from the rotating ring 55 extends to the outer end of the fixed frame 47. The surface of the gear ring 46 meshes with the surface of the meshing wheel 54.

[0029] The stabilizing component 6 includes a connecting plate 60, the end of which is fixedly connected to the surface of the fixing frame 47. The end of the connecting plate 60 away from the fixing frame 47 is fixedly connected to the stabilizing frame 61. Limiting grooves 62 are provided on the upper and lower inner walls of the stabilizing frame 61. An electric push rod 66 is fixedly connected to the inner wall of the stabilizing frame 61. The telescopic end of the electric push rod 66 is fixedly connected to the surface of the sliding ring 65. The casing 64 forms an annular limiting support for the front end of the hollow shaft 14. It cooperates with the rear end support ring 21 and the cylindrical frame 24 in the polishing component to form a two-way support system for the hollow shaft 14, which completely eliminates the radial runout and swing phenomenon at the far end during the polishing operation of the slender hollow shaft 14 and improves the smoothness of the inner wall of the oil casing 3.

[0030] The upper and lower surfaces of the sliding ring 65 are in contact with the inner walls of the two limiting grooves 62 respectively, the end of the sleeve 64 is in contact with the inner wall of the limiting groove 62, and the end of the hollow shaft 14 away from the control box 10 extends into the interior of the sleeve 64 and is in contact with the inner wall of the protective pad 63.

[0031] The vacuuming component 7 includes an air inlet pipe 73, the surface of which is rotatably connected to the inner wall of the hollow shaft 14. A fixing pipe 72 is connected to the end of the air inlet pipe 73. The end of the fixing pipe 72 away from the air inlet pipe 73 is connected to the end of the mounting bracket 74. An air pump 70 is mounted on the top of the base 1. A flexible hose 71 is connected to the air inlet of the air pump 70. The end of the flexible hose 71 away from the air pump 70 is connected to the rear cover 77. A sloping rack 79 is connected to the bottom of the mounting bracket 74. A storage rack 75 is threadedly connected to the bottom of the sloping rack 79. Airflow passes sequentially through the flexible hose 71 and the fixing... Pipe 72 delivers air to inlet pipe 73, which is rotatably mounted in the inner cavity of hollow shaft 14. It can rotate synchronously with hollow shaft 14 without blocking the negative pressure airflow path. Metal debris generated during polishing and grinding will be sucked into the pipeline in real time through the densely distributed air holes 15 on the surface of hollow shaft 14 under the action of negative pressure, realizing the synchronous collection of dust. On the one hand, it avoids the spread of a large amount of metal dust and pollution of the workshop working environment, and improves the working conditions of operators. On the other hand, it prevents debris from accumulating and adhering to the inner wall of oil casing 3 and the surface of polishing block 17, ensuring the continuous and stable polishing process.

[0032] The tapered filter frame 78 extends into the interior of the mounting bracket 74 at one end away from the rear cover 77, and the tapered end of the tapered filter frame 78 is located above the inclined slot frame 79. The fixed tube 72 extends through the control box 10 and to the outer end of the control box 10 at one end away from the intake pipe 73.

[0033] In use, the starter motor 56 drives the threaded rod 50 to rotate. As the threaded rod 50 moves, it pushes the first moving frame 40 through the threaded hole bracket 49. The first moving frame 40, in turn, pushes the second moving frame 42 through the first hydraulic rod 51. The second moving frame 42, in turn, pushes the center frame 41 through the second hydraulic rod 52. This synchronously moves the two fixed frames 47 and the telescopic arc frame 44, improving the stability of the fixed frames 47 in clamping the oil casing 3 and preventing the oil casing 3 from falling off due to asynchronous movement. After the fixed frames 47 move to the outer end of the hollow shaft 14 with the rotation of the threaded rod 50, the operator can then load the oil casing 3 to be ground into the fixed frames 47. At this time, the oil casing 3 will be located in the three-jaw chuck 4. In step 8, the operator adjusts the three-jaw chuck 48 to clamp and fix the oil casing 3, while the telescopic arc frame 44 supports the center of the oil casing 3 to prevent the center of the oil casing 3 from falling due to gravity. At this time, the start motor 56 drives the threaded rod 50 to reverse, and the threaded hole frame 49 pushes the moving frame 40 to move as the threaded rod 50 reverses. When the moving frame 40 moves, it pushes the oil casing 3 towards the control box 10 through the fixed frame 47. At this time, the hollow shaft 14 will be located inside the oil casing 3. The drive device 27 is started to drive the drive wheel 22 to rotate. The drive wheel 22 drives the hollow shaft 14 to rotate through the meshing of the gear 26. When the hollow shaft 14 rotates, it drives the grinding block 17 to rotate through the mounting base 16. The inner wall of the oil casing 3 is polished using the polishing block 17. Simultaneously, the power unit 53 is activated, driving the meshing wheel 54 to rotate. The meshing wheel 54, when rotating, drives the rotating ring 55 via the gear ring 46. The rotating ring 55, when rotating, drives the oil casing 3 to rotate via the three-jaw chuck 48. The rotation direction of the oil casing 3 is opposite to that of the hollow shaft 14, improving the polishing effect on the inner wall of the oil casing 3. Simultaneously, the rotation of the hollow shaft 14 drives the rubber block 19 to rotate, which cleans the polishing debris, allowing it to fall more easily into the hollow shaft 14 for collection, preventing debris accumulation and affecting the polishing effect. The hollow shaft 14 rotates inside the cylindrical frame 24 and the support ring 21. The cylindrical frame 24 and support ring 21 are used to improve the stability of the hollow shaft 14 during rotation, preventing the hollow shaft 14 from tilting due to gravity and affecting the power transmission of the drive device 27. When the grinding position of the hollow shaft 14 needs to be adjusted, the electric actuator 30 is activated to pull the linkage frame 29 to move. When the linkage frame 29 moves, it pulls the hollow shaft 14 to move through the bracket 28. When the hollow shaft 14 moves, it pushes the grinding block 17 to fit against the inner wall of the oil casing 3, so that the grinding block 17 can perform polishing operations on oil casings 3 with different inner diameters. When the linkage frame 29 moves, it pulls the support ring 21 to move through the hollow shaft 14. At the same time, the cylindrical frame 24 also pushes the slider 23 to slide inside the positioning groove 31 along with the hollow shaft 14.This allows the support ring 21 and the cylindrical frame 24 to maintain support and limit the hollow shaft 14. The sealing plate 25 moves with the cylindrical frame 24, sealing the limiting frame 12. The sealing plate 25 also maintains a seal on the limiting frame 12 during movement, preventing debris from entering the control box 10. When the fixed frame 47 moves toward the control box 10, it will drive the stabilizer 61 to move. The hollow shaft 14 will enter the sleeve 64 as the stabilizer 61 moves. A protective pad 63 is set inside the sleeve 64 to protect the hollow shaft 14. The sleeve 64 supports and limits the end of the hollow shaft 14, improving the stability of the hollow shaft 14 during polishing and preventing swaying. The electric actuator 2 66 will work synchronously with the electric actuator 1 30. When the electric actuator 2 66 is working, it will pull the end of the hollow shaft 14 to move, so that both ends of the hollow shaft 14 can move synchronously, preventing the hollow shaft 14 from tilting during movement due to its long length. During polishing, the air pump 70 is started. The suction generated by the air pump 70 is transmitted to the air inlet pipe 73 through the hose 71, the rear cover 77, the mounting bracket 74, and the fixing pipe 72. The suction is transmitted to the interior of the hollow shaft 14 through the air inlet pipe 73. The polishing debris is drawn into the hollow shaft 14 through the air hole 15 under the action of suction. The debris is carried by the airflow into the mounting bracket 74 and is finally intercepted by the conical filter frame 78 in the mounting bracket 74. The debris in the mounting bracket 74 slides down to the storage rack 75 through the inclined groove frame 79. The storage rack 75 is used to collect the debris for processing.

[0034] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An inner wall polishing device for oil casing processing, comprising a base (1), wherein four legs (2) are fixedly connected to the top of the base (1), characterized in that, Also includes: Polishing component (4), the polishing component (4) includes a sliding hole plate (13), the bottom of the sliding hole plate (13) is fixedly connected to the top of the support leg (2), and the end of the sliding hole plate (13) is fixedly connected to a control box (10), the upper surface of the control box (10) is connected to a limit frame (12). The feeding component (5) includes a first movable frame (40) and a second movable frame (42). The center surface of the first movable frame (40) and the center surface of the second movable frame (42) are slidably connected to the inner wall of the sliding plate (13). The top of the first movable frame (40) and the top of the second movable frame (42) are respectively equipped with a fixed frame (47). The stabilizing component (6) includes a sliding ring (65), the inner wall of which is rotatably connected to a sleeve (64), and the inner wall of the sleeve (64) is fitted with a protective pad (63). The vacuuming component (7) includes a mounting bracket (74), the surface of which is threadedly connected to an adjustment bracket (76), and a rear cover (77) is rotatably connected to the end of the adjustment bracket (76) away from the mounting bracket (74), and a conical filter bracket (78) is inserted into the inner wall of the rear cover (77).

2. The inner wall polishing device for oil casing processing according to claim 1, characterized in that: The polishing component (4) includes a hollow shaft (14), a mounting base (16) is fixedly connected to the surface of the hollow shaft (14), a polishing block (17) is inserted into the inner wall of the mounting base (16), and the polishing block (17) and the mounting base (16) are detached and installed by screws. A fitting frame (18) is fixedly connected to the surface of the hollow shaft (14), a rubber block (19) is inserted into the inner wall of the fitting frame (18), and the surface of the hollow shaft (14) has several openings. A vent (15) is provided. The end of the hollow shaft (14) extends into the interior of the control box (10). A sliding rectangular frame (20) is fixedly connected to the inner wall of the control box (10). A support ring (21) is slidably connected to the inner wall of the sliding rectangular frame (20). The inner wall of the support ring (21) is rotatably connected to the surface of the hollow shaft (14). A positioning groove (31) is provided on the inner wall of the limiting frame (12). A cylinder is slidably connected to the inner wall of the limiting frame (12). The cylindrical frame (24) has a slider (23) fixedly connected to its surface. The surface of the slider (23) is slidably connected to the inner wall of the positioning groove (31). The hollow shaft (14) has a gear (26) fixedly connected to its surface. The hollow shaft (14) has a bracket (28) rotatably connected to its surface. The inner wall of the bracket (28) is equipped with a drive device (27). The output end of the drive device (27) is fixedly connected to a drive wheel (22). The inner wall of the sliding rectangular frame (20) has a linkage frame (29) slidably connected to its inner wall. The end of the linkage frame (29) is fixedly connected to the surface of the bracket (28). The surface of the linkage frame (29) is fixedly connected to an electric push rod (30). The end of the electric push rod (30) away from the linkage frame (29) is fixedly connected to the inner wall of the control box (10). The end of the cylindrical frame (24) is fixedly connected to a sealing plate (25). The top of the control box (10) is hinged to a top cover (11).

3. The inner wall polishing device for oil casing processing according to claim 2, characterized in that: The surface of the hollow shaft (14) is rotatably connected to the inner wall of the cylindrical frame (24), the surface of the drive wheel (22) meshes with the surface of the gear (26), the surface of the cylindrical frame (24) contacts the inner wall of the limiting frame (12), the end of the sealing plate (25) near the cylindrical frame (24) contacts the surface of the limiting frame (12), there are two sliders (23), the two sliders (23) are symmetrically arranged up and down with the cylindrical frame (24) as the center, and the upper and lower surfaces of the support ring (21) are slidably connected to the inner wall of the sliding groove rectangular frame (20).

4. The inner wall polishing device for oil casing processing according to claim 3, characterized in that: The feeding component (5) includes a rotating ring (55), the end of which is rotatably connected to the inner wall of the fixed frame (47). A gear ring (46) is fixedly connected to the surface of the rotating ring (55). A power device (53) is fixedly connected to the inner wall of the fixed frame (47). A meshing wheel (54) is fixedly connected to the output end of the power device (53). A three-jaw chuck (48) is installed at the end of the rotating ring (55) away from the fixed frame (47). A center frame (41) is slidably connected to the inner wall of the sliding plate (13). A telescopic arc frame (44) is fixedly connected to the top of the center frame (41). A threaded telescopic rod (43) is rotatably connected to the top of the center frame (41). The top of the threaded telescopic rod (43) is connected to the telescopic arc frame (44). The inner wall of the telescopic arc frame (44) is rotatably connected to multiple rollers (45). The bottom of the sliding plate (13) is equipped with a motor (56). The output end of the motor (56) is fixedly connected to a threaded rod (50). The bottom of the first movable frame (40) is fixedly connected to a screw hole frame (49). The inner wall of the screw hole frame (49) is threadedly connected to the surface of the threaded rod (50). The lower surface of the first movable frame (40) is fixedly connected to a hydraulic rod (51). The telescopic end of the hydraulic rod (51) is fixedly connected to the lower surface of the second movable frame (42). The lower surface of the central frame (41) is fixedly connected to a hydraulic rod (52). The end of the hydraulic rod (52) away from the central frame (41) is fixedly connected to the lower surface of the second movable frame (42).

5. The inner wall polishing device for oil casing processing according to claim 4, characterized in that: The upper and lower ends of the first movable frame (40), the second movable frame (42) and the central frame (41) all extend to the outer end of the sliding plate (13). The first movable frame (40) and the second movable frame (42) are symmetrically arranged with the central frame (41) as the center. The oil casing (3) is held inside the three-jaw chuck (48). Multiple rollers (45) inside the telescopic arc frame (44) are in contact with the bottom surface of the oil casing (3).

6. The inner wall polishing device for oil casing processing according to claim 5, characterized in that: The end of the three-jaw chuck (48) near the rotating ring (55) contacts the inner wall of the fixed frame (47), and the end of the three-jaw chuck (48) away from the rotating ring (55) extends to the outer end of the fixed frame (47). The surface of the gear ring (46) meshes with the surface of the meshing wheel (54).

7. The inner wall polishing device for oil casing processing according to claim 6, characterized in that: The stabilizing component (6) includes a connecting plate (60), the end of which is fixedly connected to the surface of the fixing frame (47). A stabilizing frame (61) is fixedly connected to the end of the connecting plate (60) away from the fixing frame (47). Limiting grooves (62) are provided on the upper and lower inner walls of the stabilizing frame (61). An electric push rod (66) is fixedly connected to the inner wall of the stabilizing frame (61). The telescopic end of the electric push rod (66) is fixedly connected to the surface of the sliding ring (65).

8. The inner wall polishing device for oil casing processing according to claim 7, characterized in that: The upper and lower surfaces of the sliding ring (65) are in contact with the inner walls of the two limiting grooves (62), the end of the sleeve (64) is in contact with the inner wall of the limiting groove (62), and the end of the hollow shaft (14) away from the control box (10) extends into the inside of the sleeve (64) and is in contact with the inner wall of the protective pad (63).

9. The inner wall polishing device for oil casing processing according to claim 8, characterized in that: The dust collection component (7) includes an air inlet pipe (73), the surface of which is rotatably connected to the inner wall of the hollow shaft (14), the end of which is connected to a fixed pipe (72), and the end of the fixed pipe (72) away from the air inlet pipe (73) is connected to the end of the mounting bracket (74). An air pump (70) is installed on the top of the base (1), the air inlet of which is connected to a hose (71), and the end of the hose (71) away from the air pump (70) is connected to the rear cover (77). The bottom of the mounting bracket (74) is connected to a slanted rack (79), and the bottom of the slanted rack (79) is threadedly connected to a storage rack (75).

10. The inner wall polishing device for oil casing processing according to claim 9, characterized in that: The conical filter (78) extends into the interior of the mounting bracket (74) at one end away from the rear cover (77), and the conical end of the conical filter (78) is located above the inclined slot bracket (79). The fixed tube (72) extends through the control box (10) and to the outer end of the control box (10) at one end away from the air intake pipe (73).

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