Drilling device for production of perforated liner tube

Abstract

The invention relates to the technical field of liner tube drilling, in particular to a drilling device for production of a liner tube with holes, which comprises a drill bit assembly, a mounting column positioned below the drill bit assembly is horizontally arranged on a rack, and a support arc plate and a control mechanism are assembled on the mounting column; the multiple supporting arc plates are arranged in the circumferential direction of the mounting column, and the arc radiuses of the supporting arc plates are different from one another. The control mechanism comprises a rotating assembly and a driving assembly. The supporting arc plate is radially and slidably assembled outside the mounting column. The rotating assembly is used for driving the different supporting arc plates to sequentially rotate to the position below the drill bit assembly, the supporting arc plates are located at the supporting station when rotating to the position below the drill bit assembly, and the driving assembly is used for driving the supporting arc plates located at the supporting station to be away from the mounting column in the radial direction so as to support the lining pipe arranged outside the mounting column in a sleeving mode. The drilling device for production of the liner tubes with the holes has the effect of effectively improving the stability of the liner tubes with different specifications in the machining process.

Description

Technical Field

[0001] This invention relates to the technical field of liner drilling, and more specifically to a drilling device for producing perforated liner pipes. Background Technology

[0002] Perforated liners are steel pipes with multiple holes machined into the walls of oil and gas wells. They are usually manufactured by drilling or cutting using specialized drilling equipment. Their main function is to allow oil and gas to flow smoothly into the pipe, while blocking formation sand and gravel and supporting the well wall, thereby protecting the wellbore and production equipment.

[0003] Patent document CN118951099B discloses a steel pipe drilling device, including a base plate with a vertically arranged vertical plate fixedly connected to one end; a fixing seat for fixing the steel pipe body, the fixing seat being installed on the top of the base plate; a linear track installed on the top of the vertical plate, the linear track being driven by a first motor, a lifting structure installed on the linear track, the lifting structure being movable along the linear track, and a drilling structure for drilling being installed at the bottom of the lifting structure; a linear drive rod with a bidirectional extension structure installed on it, the linear drive rod being driven by a second motor, the bidirectional extension structure being movable along the linear drive rod; a drive structure for driving the bidirectional extension structure to expand towards both ends or contract towards the middle, the drive structure being installed inside the bidirectional extension structure; and a first support block and a second support block, the first support block and the second support block being located at the upper and lower ends of the bidirectional extension structure respectively, the drive structure being used to drive the first support block and the second support block to move.

[0004] The first and second motors drive the drilling structure and the bidirectional extension structure to move. After reaching the position where drilling is required, the driving structure drives the first and second support blocks on the bidirectional extension structure to expand towards both ends until they abut against the inside of the steel pipe body, thus supporting the inside of the steel pipe body.

[0005] However, this solution has the following problems: the side of the support block that abuts against the inner wall of the steel pipe uses an arc-shaped surface structure that matches a single pipe diameter, which can only accommodate steel pipes of a fixed diameter. When drilling steel pipes of different diameters, the arc-shaped surface of the support block cannot form an effective and uniform fit with the inner wall of the steel pipe, resulting in a significant reduction in the actual contact area of ​​the support point. Under the action of drilling cutting force, the inner wall of the steel pipe experiences concentrated and uneven stress, which can easily cause localized dents and out-of-roundness on the outer wall of the steel pipe. For thin-walled steel pipes, this deformation problem caused by insufficient rigidity and unstable support is even more significant. Deformation not only changes the outer dimensions of the sleeve but also causes defects such as hole position displacement, hole diameter deviation, and hole wall roughness, directly reducing drilling accuracy and processing stability. Summary of the Invention

[0006] This invention provides a drilling device for producing perforated liner pipes, aiming to solve the problems in related technologies where the support block is only suitable for a single pipe diameter, the support is unstable for liner pipes of different diameters, and the steel pipe is easily deformed and the drilling accuracy is reduced.

[0007] This invention provides a drilling device for producing perforated liner tubes, including a drill bit assembly mounted on a frame. A mounting column is horizontally arranged on the frame below the drill bit assembly. A support arc plate and a control mechanism are mounted on the mounting column. Multiple support arc plates are arranged circumferentially around the mounting column, and the arc radii of each support arc plate are different. The control mechanism includes a rotating component and a driving component that cooperate with the support arc plates. The support arc plates are radially slidably mounted outside the mounting column. The rotating component is used to drive different support arc plates to rotate sequentially to below the drill bit assembly. When the support arc plate rotates to below the drill bit assembly, it is in a supporting position. The driving component is used to drive the support arc plate in the supporting position to move radially away from the mounting column to support the liner tube placed outside the mounting column.

[0008] The effect is that by setting multiple support arc plates of different specifications outside the mounting column, the corresponding support arc plate can be selected according to the specifications of the liner to be processed, thereby improving the stability of the liner support. Specifically, before liner processing, the required support arc plate is selected according to the liner specifications; then, the rotating component drives each support arc plate to rotate around the mounting column, so that the corresponding support arc plate rotates to the bottom of the drill bit assembly and enters the support position. Subsequently, the liner is fitted onto the outside of the mounting column and the support arc plate, and the drive component drives the support arc plate to move radially and press against the liner, achieving stable support for the liner and effectively reducing liner deformation during processing. When processing liners of different specifications, the above operation is repeated, and the corresponding support arc plate is selected and switched to ensure the stability of the liner when processing liners of different specifications, thereby improving drilling quality.

[0009] Preferably, the driving assembly includes: a driving sleeve rotatably mounted on the outside of the mounting column, a driving rod located between the supporting arc plate and the driving sleeve, and a driving cylinder mounted on the mounting column; a slider is slidably mounted on the driving sleeve along the length direction of the mounting column, one end of the driving rod is rotatably engaged with the supporting arc plate, and the other end is rotatably connected to the slider; the end of the driving rod near the slider is inclined in the direction toward the driving cylinder; the driving cylinder corresponds to the support position, and the driving cylinder pushes the slider to move and drives the driving rod to rotate, so as to move the supporting arc plate away from the mounting column.

[0010] Its effect is that the drive cylinder pushes the slider to move, and when the slider moves, it drives the drive rod to rotate, which in turn drives the support arc plate to move, thereby achieving radial adjustment of the support arc plate.

[0011] Preferably, an auxiliary sleeve is rotatably mounted on the mounting column, an auxiliary block is slidably mounted on the auxiliary sleeve along the length of the mounting column, an auxiliary rod is rotatably mounted on the inner side of the supporting arc plate, the auxiliary rod is rotatably connected to the auxiliary block, the auxiliary rod is set parallel to the drive rod, and a stabilizing rod parallel to the mounting column is rotatably mounted between the auxiliary rod and the drive rod.

[0012] Its effect is that by setting auxiliary rods and stabilizing rods, it provides auxiliary support to the supporting arc plate when it moves, thereby improving the stability of the supporting arc plate.

[0013] Preferably, the auxiliary sleeve has an auxiliary groove for assembling the auxiliary block, and an elastic element connected to the auxiliary block is provided in the auxiliary groove. After the output end of the drive cylinder separates from the slider, the elastic element drives the auxiliary block to reset.

[0014] Its effect is that after the drive cylinder separates from the slider, the elastic element can drive the support arc plate to reset, which makes it easy to remove and replace the liner to be processed, or replace the support arc plate of different specifications to adapt to the support requirements of different liners.

[0015] Preferably, the rotating assembly includes: a rotating sleeve rotatably mounted on the mounting column, a drive motor mounted on the frame, a gear set connecting the rotating sleeve and the output end of the drive motor, and a slide rod installed outside the rotating sleeve. Multiple slide rods are arranged around the circumference of the rotating sleeve, and each slide rod corresponds to a multiple supporting arc plate. The slide rods are arranged perpendicular to the mounting column, and the supporting arc plates slide in cooperation with the slide rods.

[0016] Its effect is that the drive motor drives the slide rod to rotate through the gear set and rotating sleeve, thereby driving the support arc plate to rotate around the mounting column, so as to adjust the position of the support arc plate.

[0017] Preferably, a groove is provided through the drive sleeve along the length direction parallel to the mounting post, the slider is assembled in the groove, the drive cylinder is located on the side of the drive sleeve away from the auxiliary sleeve, and a push plate is provided at the output end of the drive cylinder. The drive cylinder drives the push plate into the groove to cooperate with the slider to drive the slider to move.

[0018] Preferably, the mounting column is externally fixed with a retaining sleeve, which is located at the end of the slide groove away from the drive cylinder. The retaining sleeve is provided with a relief groove, which is parallel to the mounting column. When the support arc plate rotates to the support position, the corresponding slide groove and the relief groove are connected. When the support arc plate supports the liner, the slider slides into the relief groove.

[0019] Preferably, the drill bit assembly is slidably mounted on the frame, and an elastic telescopic rod is provided on the drill bit assembly along the vertical direction. The lower end of the elastic telescopic rod is provided with a pressing part. When the drill bit assembly moves downward, the pressing part abuts against the outside of the liner and cooperates with the support arc plate to clamp the liner.

[0020] Preferably, the inner side of the supporting arc plate faces the mounting column, and a grinding layer is provided on its outer side. The piston rod of the driving cylinder is spaced apart from the inner wall of the slide groove. After drilling, the driving motor drives the supporting arc plate to rotate back and forth to grind the edge of the hole.

[0021] Its effect is that, by setting a grinding layer, after drilling is completed, the edges of the hole can be ground by the reciprocating rotation of the support arc plate, thereby improving the forming quality of the hole.

[0022] Preferably, the support arc plate is provided with multiple clearance grooves, the positions of which correspond to the holes to be machined on the liner. Beneficial effects: This invention uses a mounting column as the core support base, with multiple support arc plates of different specifications arranged in a ring around its outer periphery to meet the processing requirements of liner tubes of different diameters. Before operation, a drive motor rotates the support arc plate matching the inner diameter of the liner tube to be processed to a preset support position, completing the specification switching and position alignment. Subsequently, a drive cylinder drives the outer arc surface of the support arc plate to uniformly and tightly abut against the inner wall of the liner tube, completing the coaxial positioning and radial support of the liner tube. By switching between different specifications of support arc plates, it can adapt to the clamping and fixing requirements of liner tubes of various diameters without changing tooling or repeated adjustments, thereby improving the stability of the liner tube when processing liner tubes of different specifications, reducing liner tube deformation, and improving the processing accuracy of the liner tube. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the supporting arc plate in this invention.

[0025] Figure 3 This is a schematic diagram of the structure of the supporting arc plate and the mounting column in this invention.

[0026] Figure 4 yes Figure 3 A schematic diagram of the structure at point A in the middle.

[0027] Figure 5 yes Figure 3 A schematic diagram of the structure at point B.

[0028] Figure 6 This is a schematic diagram of the driving component in this invention.

[0029] Figure 7 This is a partial exploded view of the drive sleeve and the retaining sleeve in this invention.

[0030] Figure 8 This is a schematic diagram showing the positional relationship between the auxiliary sleeve and the driving sleeve in this invention.

[0031] Figure label: 1. Frame; 11. Lead screw; 2. Drill bit assembly; 21. Elastic telescopic rod; 211. Pressing part; 3. Mounting column; 4. Support arc plate; 41. Clearance groove; 5. Rotating assembly; 51. Rotating sleeve; 52. Drive motor; 53. Gear set; 54. Slide rod; 6. Drive assembly; 61. Drive sleeve; 611. Slider; 612. Slide groove; 62. Drive rod; 63. Drive cylinder; 631. Push plate; 7. Auxiliary assembly; 71. Auxiliary sleeve; 711. Auxiliary groove; 72. Auxiliary block; 73. Auxiliary rod; 74. Stabilizing rod; 8. Elastic element; 9. Stop sleeve; 91. Clearance groove. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] This invention discloses a drilling device for producing perforated liner tubes.

[0034] Reference Figures 1 to 8 The drilling device for producing perforated liner tubes includes a drill bit assembly 2, a mounting column 3, a support arc plate 4, a control mechanism, and auxiliary components 7, all mounted on a frame 1. The mounting column 3 is fixedly mounted horizontally on the frame 1 and is located below the drill bit assembly 2. The support arc plate 4 is fitted onto the outside of the mounting column 3. The control mechanism and auxiliary components 7 are both connected to the support arc plate 4.

[0035] During operation, the liner to be processed is first horizontally fitted onto the outside of the mounting column 3 and the supporting arc plate 4. Then, the control mechanism drives and adjusts the position of the supporting arc plate 4 to provide reliable support for the liner from the inside. During this process, the auxiliary component 7 works in concert to further enhance the stability of the support arc plate 4's support for the liner and effectively constrain the liner's position. Subsequently, the drill bit assembly 2 is activated to drill holes in the outer wall of the liner. This device, by providing continuous and stable internal support to the inner wall of the liner through the supporting arc plate 4 during the drilling process, can significantly reduce the problem of radial displacement and shaking of the liner during drilling. At the same time, it reduces defects such as tube wall dents and deformation caused by uneven stress, thereby effectively improving the positional accuracy and forming quality of the liner drilling and ensuring product processing stability.

[0036] Reference Figure 1 , Figure 2The supporting arc plate 4 is arranged along the length of the mounting column 3. Multiple supporting arc plates 4 are evenly arranged circumferentially around the mounting column 3. In this embodiment, four are set, but in other embodiments, the number can be increased or decreased according to the specifications of the liner pipe. Each supporting arc plate 4 has an overall arc-shaped plate structure, with its inner arc surface facing the mounting column 3. The arc radius corresponding to different supporting arc plates 4 is different, and they are adapted to liners of different diameters, forming a multi-specification support structure that can meet the support requirements of various pipe diameters.

[0037] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 The control mechanism includes a rotating assembly 5 and a driving assembly 6 that cooperate with the supporting arc plate 4. All supporting arc plates 4 are mounted on the outside of the mounting column 3 in a radial sliding manner and can move radially along the mounting column 3. At the same time, they can rotate circumferentially around the mounting column 3 under the drive of the rotating assembly 5. The rotating assembly 5 can rotate the supporting arc plates 4 with different arc radii to the support position directly below the drill bit assembly 2 in sequence according to the processing requirements. When the supporting arc plate 4 of the specified specification is rotated into place and is in the support position, the driving assembly 6 starts and drives the supporting arc plate 4 to move radially outward and gradually away from the mounting column 3 until the outer arc surface of the supporting arc plate 4 is tightly fitted with the inner wall of the liner sleeved outside the mounting column 3, providing a stable and uniform radial support force for the liner.

[0038] When drilling the liner, a matching support arc plate 4 can be pre-selected according to the actual outer diameter of the liner to be processed. The rotating component 5 rotates the support arc plate 4 to the support position below the drill bit assembly 2. Then, the driving component 6 pushes the support arc plate 4 to extend radially and support the inner wall of the liner, so that the liner maintains a stable shape and position during the drilling process. This achieves reliable support for liners of different diameters and effectively prevents the liner from deforming, shaking, or becoming eccentric due to the drilling force. It greatly improves the positional accuracy, coaxiality, and processing quality of the liner drilling, and ensures the stability and reliability of the processing process.

[0039] Reference Figure 1 , Figure 3The rotating assembly 5 includes a rotating sleeve 51, a drive motor 52, a gear set 53, and a slide rod 54. The rotating sleeve 51 is coaxially and rotatably fitted onto the outside of the mounting column 3, forming a stable rotational fit and providing basic support for the overall rotational movement. The drive motor 52 is fixedly mounted on the frame 1. The gear set 53 is located between the drive motor 52 and the rotating sleeve 51 to transmit power. The gear set 53 contains two meshing transmission gears, which are coaxially fixed to the output shaft of the drive motor 52 and the rotating sleeve 51, respectively. The sliding rods 54 are fixedly installed radially on the outer wall of the rotating sleeve 51. Multiple sliding rods 54 are evenly spaced around the circumference of the rotating sleeve 51, and the number of sliding rods 54 is consistent with the number of supporting arc plates 4, forming a one-to-one matching relationship. Each sliding rod 54 extends horizontally outward perpendicular to the axis of the mounting column 3. The supporting arc plate 4 and the corresponding sliding rod 54 adopt a sliding fit assembly form, so that the supporting arc plate 4 can make radial sliding movement along the length direction of the sliding rod 54, thereby realizing the radial sliding assembly of the supporting arc plate 4 on the periphery of the mounting column 3.

[0040] The rotational power output by the drive motor 52 drives the rotating sleeve 51 to rotate around the mounting column 3 via the gear set 53. While rotating, the rotating sleeve 51 will drive all the supporting arc plates 4 to rotate in a circle through the multiple sliding rods 54 fixed on it, thereby continuously adjusting the circumferential position of each supporting arc plate 4. Finally, the supporting arc plates 4 in different positions are adjusted to the designated support positions in sequence, thus completing the functions of position switching and support positioning.

[0041] Reference Figure 3 , Figure 4 , Figure 6 The drive assembly 6 includes a drive sleeve 61, a drive rod 62, and a drive cylinder 63. The drive sleeve 61 is rotatably mounted on the outside of the mounting post 3 and can rotate around the mounting post 3. The drive rod 62 is disposed between the support arc plate 4 and the drive sleeve 61. The drive cylinder 63 is disposed on the mounting post 3 and serves as the power output source. A slider 611 is slidably mounted on the drive sleeve 61 along the length direction of the mounting post 3. The slider 611 can slide freely along the length direction of the drive sleeve 61, and its sliding action is pushed and controlled by the output end of the drive cylinder 63. One end of the drive rod 62 is rotatably engaged with the support arc plate 4, allowing the drive rod 62 to rotate relative to the support arc plate 4. The other end is also rotatably connected to the slider 611, ensuring that the slider 611 can smoothly drive the drive rod 62 to rotate during the sliding process. At the same time, the end of the drive rod 62 near the slider 611 is inclined towards the drive cylinder 63.

[0042] Initially, the drive rod 62 remains tilted. When the corresponding support arc plate 4 rotates to the preset support position, the drive cylinder 63 starts, and its output end extends outward and pushes the slider 611 to move along the length of the drive sleeve 61. During the movement of the slider 611, due to its rotational connection with the drive rod 62, it will synchronously drive the drive rod 62 to rotate around the connection point with the support arc plate 4. Because of the cooperation between the slide rod 54 and the support arc plate 4, the support arc plate 4 can only move along the radial direction of the mounting column 3 and cannot produce offset in other directions. Therefore, during the rotation of the drive rod 62, it will continuously generate an outward thrust on the support arc plate 4, pushing the support arc plate 4 away from the mounting column 3, thereby achieving the adjustment of the radial position of the support arc plate 4 and ultimately achieving the purpose of stable support for the liner.

[0043] During the rotation of the supporting arc plate 4, it will be linked with the driving sleeve 61 through the driving rod 62, causing the driving sleeve 61 to rotate synchronously around the mounting column 3. The driving sleeve 61 has a through groove 612 along the length direction parallel to the mounting column 3, and the slider 611 is slidably assembled inside the groove 612, which can be displaced along the length direction of the groove 612.

[0044] Reference Figure 6 , Figure 7 A push plate 631 is fixedly installed at the output end of the drive cylinder 63. The drive cylinder 63 can drive the push plate 631 to move linearly along the length direction parallel to the mounting column 3, so that the push plate 631 extends into the slide groove 612 and cooperates with the slider 611. Then, the push plate 631 pushes the slider 611 to move along the slide groove 612, thereby realizing the adjustment of the position of the slider 611.

[0045] During the rotation of the supporting arc plate 4, the push plate 631 remains outside the slide groove 612. At this time, the drive sleeve 61 has no additional constraints and can rotate freely around the mounting column 3, effectively avoiding motion interference between the drive cylinder 63 and the push plate 631 and the rotation of the drive sleeve 61, ensuring smooth and reliable rotation of the supporting arc plate 4. When the supporting arc plate 4 rotates to its position and enters the support station, the drive cylinder 63 starts and drives the push plate 631 to extend, so that the push plate 631 enters the slide groove 612 and cooperates with the slider 611. At this time, the push plate 631 can drive the slider 611 to move along the slide groove 612, completing the adjustment of the position of the slider 611.

[0046] Reference Figure 6 , Figure 7 , Figure 8A retaining sleeve 9 is fixedly fitted onto the outside of the mounting column 3. The retaining sleeve 9 is located at the end of the sliding groove 612 on the drive sleeve 61 that is opposite to the drive cylinder 63, and can block the end of the sliding groove 612. A clearance groove 91 is provided on the retaining sleeve 9, and the length direction of the clearance groove 91 is parallel to the axis direction of the mounting column 3. When the supporting arc plate 4 rotates around the mounting column 3 to the corresponding supporting position, the sliding groove 612 corresponding to the supporting arc plate 4 and the clearance groove 91 on the retaining sleeve 9 are in a state of mutual communication.

[0047] When the drive cylinder 63 is activated and pushes the slider 611 to move along the slide groove 612 to adjust the support position of the support arc plate 4, the slider 611 can continue to slide from the slide groove 612 into the relief groove 91 of the retaining sleeve 9 under the push of the drive cylinder 63. At this time, the support arc plate 4 supports the liner tube.

[0048] For the support arc plate 4 that has not rotated to the support position, its corresponding groove 612 cannot connect with the clearance groove 91 on the retainer 9. The retainer 9 will block the end of the groove 612, preventing the corresponding slider 611 from sliding out of the groove 612 and keeping it inside the groove 612. The slider 611 is restricted within the groove 612, which in turn restricts the position of the support arc plate 4 through the drive rod 62, keeping the other support arc plates 4 stably in the retracted state and preventing them from contacting the liner tube. This avoids interfering with the drilling of the liner tube and ensures a stable and reliable machining process.

[0049] Reference Figure 1 A lead screw 11 is arranged parallel to the mounting column 3 on the frame 1. The lead screw 11 extends horizontally and is rotatably mounted on the frame 1. The power of the lead screw 11 is provided by a motor. The drill bit assembly 2 forms a threaded transmission engagement with the lead screw 11 through the mounting base. When the motor drives the lead screw 11 to rotate, the mounting base can move horizontally linearly along the axis of the lead screw 11, thereby driving the drill bit assembly 2 to achieve horizontal position adjustment. The drill bit assembly 2 and the mounting base adopt an up-and-down sliding engagement assembly method. The vertical lifting movement of the drill bit assembly 2 is driven by a cylinder, so that after the drill bit assembly 2 moves horizontally to the preset processing position, it can move vertically downward, gradually approaching the liner to be processed, and then performing drilling operations on the liner.

[0050] Reference Figure 1A flexible telescopic rod 21 is fixedly installed vertically on the drill bit assembly 2. This flexible telescopic rod 21 is a rod structure with axial elastic extension and repositioning capabilities. A pressing part 211 is provided at its lower end, and the pressing part 211 is positioned below the height of the drill bit. During the drilling process, when the drill bit assembly 2 moves downward to perform drilling, the pressing part 211 will first abut against the outer wall of the liner. As the drill bit assembly 2 continues to feed downward, the flexible telescopic rod 21 is compressed by the reaction force of the liner. At this time, under the elastic force of the flexible telescopic rod 21, the pressing part 211 forms an upper and lower clamping cooperation with the corresponding support arc plate 4 below, stably pressing and positioning the liner, ensuring that the liner does not move, shift, or shake during the drilling process, thereby improving the drilling position accuracy and processing stability.

[0051] To avoid damage to the liner surface, the pressing part 211 is made of rubber and fits with the outer wall of the liner in a flexible contact manner, eliminating the scratches, indentations or deformation problems that may be caused by rigid contact, effectively protecting the appearance and structural integrity of the liner and improving the processing quality.

[0052] The supporting arc plate 4 is assembled with its inner side facing the mounting column 3. Its outer surface is provided with a grinding layer, which can be in the form of a frosted coating, an adhesive grinding disc, or an elastic grinding layer, to meet the grinding requirements of the burrs at the orifice of the inner wall of the liner tube. The piston rod of the drive cylinder 63 is spaced apart from the inner wall of the slide groove 612, with a reasonable assembly gap reserved between them.

[0053] In this embodiment, the drilling of the liner is carried out according to the following steps: First, the liner is drilled point by point along the length direction parallel to the mounting column 3. After the drilling process of the current area is completed, the radial support of the support arc plate 4 on the inner wall of the liner is released. Then, the circumferential or axial position of the liner is adjusted so that the area to be processed is aligned with the drilling mechanism. Then, drilling is carried out on other positions to achieve multi-hole processing at different positions of the liner.

[0054] After each single-hole drilling is completed, the drive motor 52 is activated and drives the support arc plate 4 to rotate in both directions. At the same time, the pressing part 211 continuously applies a pressing force to the outer wall of the liner tube, so that during the rotation of the support arc plate 4, due to the pressing action of the pressing part 211, the support arc plate 4 and the inner wall of the liner tube can rotate relative to each other. The grinding layer on the outer side of the support arc plate 4 then continuously contacts and rubs against the drilling edge, grinding and removing the burrs, flash and sharp edges generated at the hole opening, improving the hole opening processing accuracy and surface finish, thereby ensuring the overall processing quality of the liner tube.

[0055] When the drive sleeve 61 reciprocates along with the supporting arc plate 4, the push plate 631, driven by the drive cylinder 63, always remains in contact with the slider 611, allowing the slider 611 to slide relative to the push plate 631. Simultaneously, because the piston rod of the drive cylinder 63 and the inner wall of the slide groove 612 are spaced apart with a reasonable gap, the piston rod of the drive cylinder 63 will not contact or rub against the inner wall of the slide groove 612 during movement. This avoids motion interference caused by the reciprocating rotation of the drive sleeve 61 by the drive cylinder 63, ensuring smooth and reliable operation of the overall mechanism.

[0056] Reference Figure 5 The supporting arc plate 4 has multiple clearance grooves 41, the positions of which correspond to the positions of the holes to be machined on the liner. When the drill bit of the drill bit assembly 2 drills the liner, the drill bit can pass through the liner and extend into the corresponding clearance groove 41, thereby effectively avoiding collision and interference between the drill bit and the supporting arc plate 4 during the drilling process, ensuring the smooth progress of the drilling process.

[0057] In addition, the polishing layer can be specifically set in the edge area of ​​the relief groove 41, so that the polishing layer can be arranged close to the drilling position. During the reciprocating rotation of the support arc plate 4, the burrs on the edge of the hole can be polished directly and efficiently.

[0058] Reference Figure 3 , Figure 5 , Figure 8 The auxiliary component 7 includes: an auxiliary sleeve 71, an auxiliary block 72, an auxiliary rod 73, and a stabilizing rod 74. The auxiliary sleeve 71 is mounted on the mounting post 3 with a rotating sleeve 51, allowing it to rotate freely around the axis of the mounting post 3. The auxiliary block 72 is slidably mounted on the auxiliary sleeve 71 along the length of the mounting post 3, rotating with the auxiliary sleeve 71 and sliding relative to it along the axial direction of the mounting post 3. One end of the auxiliary rod 73 is rotatably connected to the inner wall of the supporting arc plate 4, and the other end is rotatably connected to the auxiliary block 72. The auxiliary rod 73 and the drive rod 62 are arranged parallel to each other. A stabilizing rod 74 is also rotatably connected between the auxiliary rod 73 and the drive rod 62, with the axis of the stabilizing rod 74 parallel to the axis of the mounting post 3.

[0059] When the drive cylinder 63 drives the support arc plate 4 to move radially via the drive rod 62, the drive rod 62 swings and drives the support arc plate 4 to move synchronously. Simultaneously, the auxiliary rod 73 swings synchronously with the support arc plate 4, the auxiliary block 72 slides adaptively along the length of the mounting post 3, and the auxiliary sleeve 71 rotates adaptively around the mounting post 3. During this process, the stabilizing rod 74 remains parallel to the support arc plate 4, so that the drive rod 62, auxiliary rod 73, stabilizing rod 74, and support arc plate 4 together form a stable parallelogram structure. This provides multi-point, synchronous auxiliary support to the support arc plate 4, effectively limiting the skewness, swaying, or jamming of the support arc plate 4 during radial movement. It significantly improves the stability and reliability of the support arc plate 4 during telescopic movement and when supporting and positioning the inner wall of the liner, ensuring that the liner maintains a stable posture during drilling and grinding.

[0060] Reference Figure 5 The auxiliary sleeve 71 has an auxiliary groove 711 for assembling the auxiliary block 72. The auxiliary block 72 is slidably assembled in the auxiliary groove 711. An elastic element 8, specifically a spring, is provided in the auxiliary groove 711. One end of the spring is connected to the auxiliary groove 711, and the other end is connected to the auxiliary block 72. When the supporting arc plate 4 moves radially under the action of the driving cylinder 63, the auxiliary block 72 slides synchronously along the auxiliary groove 711 with the auxiliary rod 73. At this time, the elastic element 8 is elastically deformed by the auxiliary block 72.

[0061] When the output end of the drive cylinder 63 separates from the slider 611, the elastic element 8 releases its elastic potential energy and drives the auxiliary block 72 to reset along the auxiliary groove 711. During the reset process, the auxiliary block 72 pulls the support arc plate 4 towards the mounting column 3 via the auxiliary rod 73 to retract and reset. Since the drive rod 62 and the auxiliary rod 73 rotate synchronously, the slider 611 can be driven to reset synchronously via the drive rod 62 while the auxiliary block 72 is resetting, so that the overall mechanism returns to its initial state. This allows the support arc plates 4 of different specifications to be rotated to the support position to continue supporting, positioning, and processing the liner.

[0062] The principle of this invention is as follows: This device sets multiple support arc plates 4 of different specifications on the outer periphery of the mounting column 3 to adapt to the processing requirements of liner tubes with different inner diameters. Before drilling the liner tube, the corresponding support arc plate 4 is driven by the drive motor 52 to rotate to the support position according to the inner diameter specification of the liner tube to be processed, so that the support arc plate 4 is aligned with the area to be supported inside the liner tube.

[0063] Subsequently, the drive cylinder 63 starts and pushes the drive rod 62 to rotate. Under the guidance and limiting action of the slide rod 54, the drive rod 62 drives the support arc plate 4 to gradually move away from the mounting post 3 radially. The support arc plate 4 extends outward and gradually approaches the inner wall of the liner, eventually abutting tightly against the inner wall of the liner, thus achieving reliable support and positioning of the inner wall of the liner. By switching between different specifications of support arc plates 4, the device can be adapted to support and fix liners of various diameters. During the drilling process, it effectively counteracts the cutting force on the liner, significantly reducing the deformation, vibration, and displacement of the liner, and improving the stability of the processing.

[0064] After drilling is completed, the drive motor 52 is activated again and drives the support arc plate 4 to reciprocate. The grinding layer on the outside of the support arc plate 4 rotates along with it and continuously contacts and rubs against the edge of the hole on the liner, grinding away the burrs, flash and sharp edges at the hole, thereby improving the smoothness and dimensional accuracy of the hole and improving the overall processing quality and accuracy of the liner.

[0065] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A drilling apparatus for producing perforated liner pipes, comprising a drill bit assembly mounted on a frame, characterized in that, A mounting column is horizontally installed on the frame below the drill bit assembly. The mounting column is equipped with a support arc plate and a control mechanism. Multiple support arc plates are arranged around the circumference of the mounting column, and the radius of each support arc plate is different. The control mechanism includes a rotating component and a driving component that cooperate with the support arc plates. The support arc plates are radially slidably mounted on the outside of the mounting column. The rotating assembly is used to drive different support arc plates to rotate sequentially to the bottom of the drill bit assembly. When the support arc plate rotates to the bottom of the drill bit assembly, it is in the support position. The driving assembly is used to drive the support arc plate in the support position to move radially away from the mounting column, so as to support the liner sleeve placed outside the mounting column.

2. The drilling apparatus for producing perforated liner pipes according to claim 1, characterized in that, The drive assembly includes: a drive sleeve rotatably mounted on the outside of the mounting column, a drive rod located between the support arc plate and the drive sleeve, and a drive cylinder mounted on the mounting column; a slider is slidably mounted on the drive sleeve along the length of the mounting column; one end of the drive rod is rotatably engaged with the support arc plate, and the other end is rotatably connected to the slider; the end of the drive rod near the slider is inclined toward the drive cylinder; the drive cylinder corresponds to the support position, and the drive cylinder pushes the slider to move and drives the drive rod to rotate, so as to move the support arc plate away from the mounting column.

3. The drilling device for producing perforated liner pipes according to claim 2, characterized in that, An auxiliary sleeve is rotatably mounted on the mounting column, and an auxiliary block is slidably mounted on the auxiliary sleeve along the length of the mounting column. An auxiliary rod is rotatably mounted on the inner side of the support arc plate, and the auxiliary rod is rotatably connected to the auxiliary block. The auxiliary rod is set parallel to the drive rod, and a stabilizing rod parallel to the mounting column is rotatably mounted between the auxiliary rod and the drive rod.

4. The drilling apparatus for producing perforated liner pipes according to claim 3, characterized in that, The auxiliary sleeve has an auxiliary groove for assembling the auxiliary block. An elastic element connected to the auxiliary block is installed in the auxiliary groove. After the output end of the drive cylinder separates from the slider, the elastic element drives the auxiliary block to reset.

5. The drilling apparatus for producing perforated liner pipes according to claim 3, characterized in that, The rotating assembly includes: a rotating sleeve rotatably mounted on a mounting column, a drive motor mounted on a frame, a gear set connecting the rotating sleeve and the output end of the drive motor, and a slide rod installed outside the rotating sleeve. Multiple slide rods are arranged around the circumference of the rotating sleeve, and each slide rod corresponds to a multiple supporting arc plate. The slide rods are arranged perpendicular to the mounting column, and the supporting arc plates slide in cooperation with the slide rods.

6. The drilling apparatus for producing perforated liner pipes according to claim 5, characterized in that, A groove is provided through the drive sleeve along the length direction parallel to the mounting post. The slider is assembled in the groove. The drive cylinder is located on the side of the drive sleeve away from the auxiliary sleeve. A push plate is provided at the output end of the drive cylinder. The drive cylinder drives the push plate into the groove to cooperate with the slider to move the slider.

7. The drilling apparatus for producing perforated liner pipes according to claim 6, characterized in that, The mounting column is externally fixed with a retaining sleeve, which is located at the end of the slide groove away from the drive cylinder. The retaining sleeve is provided with a clearance groove, which is parallel to the mounting column. When the support arc plate rotates to the support position, the corresponding slide groove and clearance groove are connected. When the support arc plate supports the liner, the slider slides into the clearance groove.

8. The drilling apparatus for producing perforated liner pipes according to claim 6, characterized in that, The drill bit assembly is slidably mounted on the frame. An elastic telescopic rod is provided on the drill bit assembly along the vertical direction. A pressing part is provided at the lower end of the elastic telescopic rod. When the drill bit assembly moves downward, the pressing part abuts against the outside of the liner and cooperates with the support arc plate to clamp the liner.

9. The drilling apparatus for producing perforated liner pipes according to claim 8, characterized in that, The inner side of the support arc plate faces the mounting column, and a grinding layer is provided on its outer side. The piston rod of the drive cylinder is spaced apart from the inner wall of the slide groove. After drilling, the drive motor drives the support arc plate to rotate back and forth to grind the edge of the hole.

10. The drilling apparatus for producing perforated liner pipes according to claim 6, characterized in that, Multiple clearance grooves are provided on the support arc plate, and the positions of the clearance grooves correspond to the holes to be machined on the liner.

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