A kind of repairing oil pipe and inner lining oil pipe processing pipe head distance turning device

Abstract

The application discloses a kind of repair oil pipe and inner lining oil pipe processing pipe head fixed distance turning device, belong to petroleum pipe processing equipment field, including pedestal, fixed on the centering assembly of pedestal upper end, sliding setting in the feed turning portion for axial movement of pedestal upper end;It also includes the end cutting assembly and end cutting assembly of setting in the pedestal upper end and being respectively located in the two sides of centering assembly, the end cutting assembly includes seat body movably arranged on the pedestal, end cutting portion for cutting the one end of oil pipe is arranged in one side of seat body;During end turning process, inner fixed part can be in-depth into oil pipe interior and outwardly brace its inner wall, to establish the support point of internal expansion in oil pipe interior, cooperate with external centering assembly, end fixed component, form the multi-point combined positioning structure of outer clamping and inner support, effectively overcome the radial runout of long pipe piece overhanging end, eliminate cutting vibration, guarantee the coaxiality precision of pipe head turning processing.

Description

Technical Field

[0001] This invention relates to the field of oil pipe processing equipment, and more specifically, to a pipe end fixed-distance turning processing device for repairing oil pipes and inner-lined oil pipes. Background Technology

[0002] Repairing oil pipe turning refers to the turning process performed on oil well pipes that have experienced thread wear, corrosion, or breakage after service in the oil field, requiring the removal of damaged pipe ends and re-threading for recycling.

[0003] Turning of lined oil pipes refers to the machining of composite pipes with non-metallic anti-corrosion layers such as plastic, fiberglass, or anti-corrosion coatings on the inner wall of a metal base pipe. When machining the ends, the end face and the edge of the inner lining need to be finely trimmed and deburred to ensure sealing.

[0004] Fixed-distance turning refers to a machining process in which a positioning mechanism is used to establish a precise machining reference along the axial direction of the pipe during the turning process, ensuring that the machining length after the pipe head is cut off or the end face is flattened is highly consistent with the reference dimension.

[0005] Currently, existing oil pipe end turning equipment typically uses external clamping mechanisms such as lathe chucks to fix the middle section of the oil pipe when clamping it, and the pipe end is cut and turned by external tool post while the oil pipe is rotating.

[0006] However, relying solely on external clamping for positioning when cutting the end of long tubing has significant drawbacks. Because the tubing to be processed is relatively long (with a large length-to-diameter ratio), and the tubing itself may have slight bends, or there may be manufacturing tolerances and deformations in the inner and outer diameters, the suspended end of the tubing is highly susceptible to radial runout and high-frequency vibration under cutting forces. This runout is particularly problematic for oil well tubing or lined tubing requiring high-pressure sealing. It not only makes it difficult to ensure the coaxiality of the inner bore of the end of the tubing with the axis of rotation of the turning spindle, but also directly leads to machining defects such as misalignment and tool deflection during secondary threading, or causes uneven end-face finishing of the anti-corrosion lining, ultimately resulting in a serious risk of tubing leakage. Summary of the Invention

[0007] In view of the problems existing in the prior art, the purpose of the present invention is to provide a pipe head fixed-distance turning processing device for repairing oil pipes and inner lining oil pipes.

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A pipe end fixed-distance turning processing device for repairing oil pipes and inner-lined oil pipes includes a base, a centering component fixed to the upper end of the base, and a feed turning part slidably disposed on the upper end of the base for axial movement.

[0010] It also includes an end-fixing component and an end-cutting component, which are disposed on the upper end of the base and located on both sides of the centering component. The end-cutting component includes a seat body movably disposed on the base and an end-cutting part disposed on one side of the seat body for cutting one end of the oil pipe.

[0011] The base is provided with an inner fixing component, which includes a column fixed to one side of the base, a plurality of first movable grooves opened on the outer surface of the column, an inner fixing part slidably connected in the plurality of first movable grooves, a rotating column rotatably connected to the inside of the column and a turntable fixed to the outside of the rotating column, a plurality of drive guide grooves opened inside the turntable, a plurality of first guide posts movably inserted in the drive guide grooves, and a drive component fixed to one side of the base for driving the rotating column to rotate. One end of the plurality of first guide posts is connected to the plurality of inner fixing parts.

[0012] Furthermore, the end-cutting assembly also includes a first axial drive unit disposed within the base and connected to the base body to drive the base body to move axially. The end-cutting unit includes two movable seats symmetrically slidably connected to one side of the base body, a second axial drive unit disposed within the base body and connected to the two movable seats to drive the two movable seats to move toward each other, and two first cutters respectively fixed to one side of the two movable seats.

[0013] Furthermore, the end-fixing assembly includes a lower support fixed to the upper end of the base, two first hydraulic rods symmetrically fixed to the lower end of the lower support, an upper support located above the lower support, and a plurality of rollers rotatably disposed on the inner walls of the upper and lower supports. The telescopic ends of the first hydraulic rods pass through the lower support and are fixed to the lower end of the upper support.

[0014] Furthermore, the drive assembly includes a frame fixed to the other side of the base, a first gear rotatably connected to the other side of the base and a second gear meshing with the first gear, a first motor fixed to one side of the frame and with its output shaft passing through the frame and fixed to the first gear, and one end of the rotating column passing through the base and fixed to the second gear.

[0015] Furthermore, the inner fixed part includes a first movable block that slides in the first movable groove, a second movable block disposed on one end of the first movable block that extends out of the first movable groove, and a wheel that is rotatably connected to one side of the second movable block, and one end of the first guide post is fixedly connected to one side of the first movable block.

[0016] Furthermore, the first movable block is also provided with an adaptation and adjustment component. The adaptation and adjustment component includes a second movable groove opened inside the first movable block, a third movable block slidably connected in the second movable groove, a spring provided in the second movable groove, two guide grooves opened on one side of the first movable block, and two second guide posts respectively movably inserted into the two guide grooves and fixed at one end to one side of the second movable block. One end of the third movable block extends out of the first movable block and is fixedly connected to one side of the second movable block. The two ends of the spring are respectively connected to the inner wall of the second movable groove and one side of the third movable block.

[0017] Furthermore, it also includes a limiting assembly, which includes a second hydraulic rod fixed to one side of the frame, a push rod movably inserted inside the rotating column, multiple third movable slots opened on the outer surface of the rotating column, a sliding part movably disposed in the third movable slots and fixedly sleeved outside the push rod, a disc movably disposed inside the rotating column and rotatably connected to the outside of the sliding part, a slide block slidably connected to one side of the disc, and two limiting posts fixed to one side of the slide block. One end of each of the two limiting posts passes through an adjacent first movable block and enters the second movable slot to limit the third movable block.

[0018] Furthermore, one end of the column is provided with an in-tube processing assembly, which includes a fixed base fixed to one end of the column, a fourth movable groove opened inside the fixed base, a tool holder slidably connected in the fourth movable groove, a second tool fixed to the upper end of the tool holder, a gear part set inside the fixed base to drive the tool holder to rise and fall, a rotating rod rotatably connected inside the column and connected to the gear part, and a second motor fixed to one side of the frame, wherein the output shaft of the second motor passes through the frame and the base and is connected to one end of the rotating rod.

[0019] Furthermore, two third guide posts are fixedly connected to the inner wall of the fourth movable groove, and the tool holder is movably sleeved on the outside of the two third guide posts.

[0020] Furthermore, the gear section consists of two meshing transmission gears, and one side of the tool holder is provided with a tooth groove that meshes with the transmission gears. One end of the rotating rod is connected to one of the transmission gears.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] (1) By setting an inner fixing component on one side of the seat, the inner fixing part can penetrate into the oil pipe and tighten its inner wall outward during the end turning process, thereby establishing an internal expansion support point inside the oil pipe. It cooperates with the external centering component and the end fixing component to form a multi-point joint positioning structure of external clamping and internal support. The multi-point joint positioning structure uses the internal wheel to radially offset the cutting force applied by the external turning tool, overcomes the radial runout of the suspended end of the long pipe from the rigid mechanical structure, eliminates cutting vibration, and forces the rotation center of the inner hole of the pipe end to be aligned with the axis of the turning spindle, thereby ensuring the coaxiality accuracy of the pipe end turning process and meeting the positioning requirements for re-threading of the damaged oil pipe end.

[0023] (2) The internal positioning component of the present invention has an adaptive adjustment component built in. When the inner wall of the oil pipe is covered with iron filings, dirt or uneven manufacturing tolerances, the wheel in contact with the inner wall can drive the second and third movable blocks to make radial retraction under the elastic action of the spring, so as to realize adaptive buffer adjustment, avoid the positioning mechanism forcibly squeezing impurities, which would cause the mechanism to lock or be damaged, and improve the stability of the device under complex working conditions.

[0024] (3) The present invention is equipped with a limiting component. When machining tubing with a smooth inner wall, high cleanliness, or requiring roughing with a large depth of cut, the limiting pin can be driven by the second hydraulic rod to insert into the second movable groove and lock the third movable block, limiting its adaptive yielding degree of freedom, thereby converting the positioning state into rigid support. This design allows a single device to be compatible with two different machining environments: flexible guidance of foul-smelling tubing and high-rigidity heavy-duty cutting of clean tubing heads. It provides higher coaxial stability and anti-cutting force performance, and broadens the applicability of the device in oilfield well workover sites.

[0025] (4) In the positioning state, the tool holder is raised and lowered by the second motor, so that the second tool can perform boring, deburring and cleaning of excessive impurities on the inner surface of the oil pipe. By coordinating the axial movement of the base with the rotation of the oil pipe itself, the combined machining of pipe end cutting and inner hole finishing can be completed in one go without secondary clamping, reducing the changeover process and effectively improving the overall machining efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the second axial drive unit, movable seat, and first cutting tool structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the internal component structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the limiting component and the in-tube processing component of the present invention;

[0030] Figure 5 This is a schematic diagram of the drive guide groove and inner fixing part structure of the present invention;

[0031] Figure 6 This is a sectional view of the internal part of the present invention;

[0032] Figure 7 This is a cross-sectional view of the limiting component and the rotating column of the present invention;

[0033] Figure 8 This is a schematic diagram of the disc body, slide, and limiting post structure of the present invention;

[0034] Figure 9 This is a cross-sectional view of the fixing base of the present invention.

[0035] Explanation of the labels in the diagram:

[0036] 1. Base; 2. End-fixing assembly; 21. Lower support; 22. First hydraulic rod; 23. Upper support; 24. Roller body; 3. Centering assembly; 4. Feed turning section; 5. End-cutting assembly; 51. First axial drive section; 52. Seat; 53. Second axial drive section; 54. Movable seat; 55. First cutting tool; 6. Inner-fixing assembly; 61. Column; 62. First movable groove; 63. Frame; 64. First motor; 65. First gear; 66. Second gear; 67. Rotating column; 68. Turntable; 681. Drive guide groove; 69. Inner-fixing section; 691. First movable block; 6 92. First guide post; 693. Second movable block; 694. Wheel body; 7. Adaptive adjustment assembly; 71. Second movable groove; 72. Spring; 73. Guide groove; 74. Second guide post; 75. Third movable block; 8. Limiting assembly; 81. Second hydraulic rod; 82. Third movable groove; 83. Disc body; 84. Slide seat; 85. Limiting post; 86. Push rod; 87. Sliding part; 9. In-tube processing assembly; 91. Second motor; 92. Rotating rod; 93. Fixed seat; 94. Fourth movable groove; 95. Second cutting tool; 96. Third guide post; 97. Gear part; 98. Tool holder. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] Please see Figures 1 to 9A pipe end fixed-distance turning processing device for repairing oil pipes and inner lining oil pipes includes a base 1, a centering component 3 fixed on the upper end of the base 1, and a feed turning part 4 slidably disposed on the upper end of the base 1 for axial movement.

[0039] It also includes an end-fixing component 2 and an end-cutting component 5, which are disposed on the upper end of the base 1 and located on both sides of the centering component 3, respectively. The end-cutting component 5 includes a seat 52 movably disposed on the base 1 and an end-cutting part disposed on one side of the seat 52 for cutting one end of the oil pipe.

[0040] The base 52 is provided with an inner fixing component 6, which includes a column 61 fixed to one side of the base 52, a plurality of first movable grooves 62 formed on the outer surface of the column 61, inner fixing parts 69 respectively slidably connected in the plurality of first movable grooves 62, a rotating column 67 rotatably connected inside the column 61 and a turntable 68 fixed outside the rotating column 67, a plurality of drive guide grooves 681 formed inside the turntable 68, a plurality of first guide posts 692 respectively movably inserted in the drive guide grooves 681, and a drive component fixed to one side of the base 52 for driving the rotating column 67 to rotate. One end of the plurality of first guide posts 692 is respectively connected to the plurality of inner fixing parts 69.

[0041] The end-cutting assembly 5 also includes a first axial drive part 51 disposed in the base 1 and connected to the seat body 52 to drive the seat body 52 to move axially. The end-cutting part includes two movable seats 54 symmetrically slidably connected to one side of the seat body 52, a second axial drive part 53 disposed in the seat body 52 and connected to the two movable seats 54 to drive the two movable seats 54 to move towards each other, and two first cutters 55 respectively fixed to one side of the two movable seats 54.

[0042] The end-fixing component 2 includes a lower support 21 fixed to the upper end of the base 1, two first hydraulic rods 22 symmetrically fixed to the lower end of the lower support 21, an upper support 23 located above the lower support 21, and a plurality of rollers 24 rotatably disposed on the inner walls of the upper support 23 and the lower support 21. The telescopic ends of the first hydraulic rods 22 pass through the lower support 21 and are fixed to the lower end of the upper support 23.

[0043] The drive assembly includes a frame 63 fixed to the other side of the base 52, a first gear 65 rotatably connected to the other side of the base 52 and a second gear 66 meshing with the first gear 65, a first motor 64 fixed to one side of the frame 63 with its output shaft passing through the frame 63 and fixed to the first gear 65, and one end of the rotating column 67 passing through the base 52 and fixed to the second gear 66.

[0044] The inner fixed part 69 includes a first movable block 691 that slides in the first movable groove 62, a second movable block 693 that is disposed on one end of the first movable block 691 that extends out of the first movable groove 62, and a wheel 694 that is rotatably connected to one side of the second movable block 693. One end of the first guide post 692 is fixedly connected to one side of the first movable block 691.

[0045] During the machining of the repaired oil pipe, the first axial drive unit 51 is controlled to drive the seat body 52 to translate, and the distance between the centering component 3 and the seat body 52 is adjusted to complete the initial distance setting. Then, one end of the oil pipe to be machined passes between the upper support 23 and the lower support 21, and passes through the centering component 3 to contact one side of the seat body 52. ​​The centering component 3 is controlled to work to center and clamp the oil pipe, preventing the oil pipe from moving axially. The first hydraulic rod 22 is controlled to work and retract to drive the upper support 23 to descend, so that the lower end of the upper support 23 contacts the upper end of the lower support 21. The rollers 24 on the inner walls of the upper support 23 and the lower support 21 contact the outer surface of the other end of the oil pipe, thus centering and positioning the oil pipe. Then, the first motor 64 is controlled to work, which drives the first gear 65 and the second gear 66 to rotate. The rotation of the second gear 66 drives the rotating column 67 to rotate, and the rotation of the rotating column 67 drives the turntable 68 to rotate. The multiple drive guide grooves 681 inside the turntable 68 are involute spiral guide grooves or eccentric inclined grooves extending radially outward along the turntable 68. When the turntable 68 rotates circumferentially, the inner wall of the spiral drive guide groove 681 generates a radial cam extrusion thrust on the first guide post 692, which in turn drives the first guide post 692 to move. The movement of the first guide post 692 can drive the first movable block 691 to make radial linear movement in the first movable groove 62, so that one end of the first movable block 691 extends out of the first movable groove 62. When the first movable block 691 extends out of the first movable groove 62, the first movable block 691 can drive the second movable block 693 and the wheel 694 to move, so that the wheel 694 approaches the inner wall of the oil pipe and contacts the inner wall, realizing internal expansion positioning. By positioning the left end of the tubing with end-positioning component 2, positioning the middle section of the tubing with centering component 3, and positioning the right end of the tubing with inner-positioning component 6, the coaxiality of repeated positioning is improved.

[0046] After completing the above operations, control the centering component 3 to rotate. The rotation of the centering component 3 drives the oil pipe to rotate. The centering component 3 adopts the existing lathe centering chuck system, which can center, clamp, and rotate the oil pipe. When the oil pipe rotates, the roller 24 and the wheel 694 can rotate synchronously with the oil pipe. Then control the feed turning part 4 to move towards the outer surface of the oil pipe, so that the cutting tool installed on the feed turning part 4 approaches the outer surface of the oil pipe until it contacts the oil pipe, and turns the oil pipe to cut the entire section of the repaired oil pipe with the failed thread laterally, shortening the total length of the pipe body, which facilitates subsequent re-threading.

[0047] During the machining of the inner lining oil pipe, the first axial drive unit 51 is controlled to drive the seat body 52 to translate, adjusting the distance between the centering component 3 and the seat body 52 to complete the initial spacing. The second axial drive unit 53 is controlled to drive the two movable seats 54 to move towards each other until the two first cutters 55 on the two movable seats 54 can match the outer diameter of the inner lining oil pipe, that is, the two first cutters 55 can contact one end of the inner lining oil pipe. Then, one end of the oil pipe to be machined passes between the upper support 23 and the lower support 21, and passes through the centering component 3 to contact the first cutter 55. The centering component 3 is controlled to center and clamp the oil pipe, preventing the oil pipe from moving axially. The first hydraulic rod 22 is controlled to retract, driving the upper support 23 to descend, so that the lower end of the upper support 23 contacts the upper end of the lower support 21. The rollers 24 on the inner walls of the upper support 23 and the lower support 21 contact the outer surface of the other end of the oil pipe, thus centering and positioning the oil pipe. The centering assembly 3 is controlled to rotate, which in turn drives the oil pipe to rotate. The first cutter 55 can be used to machine the end face of the inner liner oil pipe. The machining process includes chamfering, deburring, and leveling the end face of one end of the inner liner oil pipe to obtain a flat and vertical pipe end sealing surface. The machining process performed on the end face by the first cutter 55 can also be used to repair the transversely cut end face of the oil pipe (the end face of the transversely cut section of the pipe end with the failed thread).

[0048] like Figure 6 As shown, the first movable block 691 is further provided with an adaptation adjustment component 7. The adaptation adjustment component 7 includes a second movable groove 71 opened inside the first movable block 691, a third movable block 75 slidably connected in the second movable groove 71, a spring 72 provided in the second movable groove 71, two guide grooves 73 opened on one side of the first movable block 691, and two second guide posts 74 respectively movably inserted into the two guide grooves 73 and fixed at one end to one side of the second movable block 693. One end of the third movable block 75 passes through the first movable block 691 and is fixed to one side of the second movable block 693. The two ends of the spring 72 are respectively connected to the inner wall of the second movable groove 71 and one side of the third movable block 75.

[0049] If impurities adhere to the inner wall of the oil pipe, this will result in an uneven inner wall. When the oil pipe rotates and the impurities come into contact with the wheel 694, the impurities will push the wheel 694 and the second movable block 693 to move in the opposite direction to the first movable block 691. The second movable block 693 drives the third movable block 75 to move in the first movable groove 62. The third movable block 75 compresses the spring 72, and the two second guide posts 74 can move in the two guide grooves 73. After the wheel 694 separates from the impurities, the spring 72 can push the third movable block 75 and the second movable block 693 to reset, so that the wheel 694 can adapt to impurities and improve the stability of positioning.

[0050] like Figure 4 , Figure 5 , Figure 7 , Figure 8 As shown, it also includes a limiting component 8, which includes a second hydraulic rod 81 fixed to one side of the frame 63, a push rod 86 movably inserted inside the rotating column 67, a plurality of third movable slots 82 formed on the outer surface of the rotating column 67, a sliding part 87 movably disposed in the third movable slots 82 and fixedly sleeved outside the push rod 86, a disc 83 movably disposed inside the rotating column 67 and rotatably connected to the outside of the sliding part 87, a slide seat 84 slidably connected to one side of the disc 83, and two limiting posts 85 fixed to one side of the slide seat 84. One end of the two limiting posts 85 passes through the adjacent first movable block 691 and enters the second movable slot 71 to limit the third movable block 75.

[0051] To meet the internal positioning function of oil pipes under different working conditions, internal positioning of oil pipes with impurities on the inner wall is achieved through the adaptive adjustment component 7. When internal positioning of oil pipes with clean inner walls, the second hydraulic rod 81 can be controlled to retract. When the second hydraulic rod 81 retracts, it drives the push rod 86 to move axially inside the rotating column 67. The movement of the push rod 86 can drive the sliding part 87 to move in the third movable groove 82. The sliding part 87 can also drive the disc 83 to move. When the disc 83 moves, it can drive the slide 84 to move, so that the two limiting posts 85 on one side of the slide 84 are inserted into the second movable groove 71, and limit the third movable block 75 in the second movable groove 71, preventing the third movable block 75 from moving towards the spring 72 in the second movable groove 71, thus achieving rigid internal support positioning and ensuring coaxial stability. The movement state of the third movable block 75 can be controlled according to the condition of the oil pipe to match the processing of oil pipes under different working conditions.

[0052] like Figure 4 and Figure 9 As shown, one end of the column 61 is provided with an in-pipe processing component 9. The in-pipe processing component 9 includes a fixed base 93 fixed to one end of the column 61, a fourth movable groove 94 opened inside the fixed base 93, a tool holder 98 slidably connected in the fourth movable groove 94, a second tool 95 fixed to the upper end of the tool holder 98, a gear part 97 set inside the fixed base 93 to drive the tool holder 98 to rise and fall, a rotating rod 92 rotatably connected inside the column 61 and connected to the gear part 97, and a second motor 91 fixed to one side of the frame 63. The output shaft of the second motor 91 passes through the frame 63 and the base 52 and is connected to one end of the rotating rod 92.

[0053] Two third guide posts 96 are fixedly connected to the inner wall of the fourth movable groove 94, and the tool holder 98 is movably sleeved on the outside of the two third guide posts 96.

[0054] The gear section 97 consists of two meshing transmission gears. The tool holder 98 has a tooth groove on one side that meshes with the transmission gears. One end of the rotating rod 92 is connected to one of the transmission gears.

[0055] By adopting the above technical solution, the second motor 91 is controlled to drive the rotating rod 92 to rotate. The rotation of the rotating rod 92 drives the gear part 97 to work. The working of the gear part 97 drives the tool holder 98 to move upward in the fourth movable groove 94, so that the second tool 95 can extend out of the fourth movable groove 94. The second tool 95 can then cut the inner surface of the oil pipe. After the boring or deburring of the inner wall of the oil pipe is completed, the second motor 91 is controlled to rotate in the opposite direction. The gear part 97 drives the tool holder 98 to retract downward in the fourth movable groove 94, so that the second tool 95 retracts into the fixed seat 93, completing the tool retraction and reset, so as to facilitate the smooth unloading of the oil pipe. When there are too many impurities and the inner wall of the oil pipe is too thick, the inner surface of the oil pipe is bored flat in this way. When the second tool 95 is processing the inner surface of the oil pipe, the centering component 3 drives the oil pipe to rotate, processing the inner wall of the oil pipe circumferentially. At the same time, the first axial drive part 51 drives the seat body 52 and the second tool 95 to move axially, changing the processing position of the inner wall of the oil pipe.

[0056] Usage: First, the first axial drive unit 51 drives the seat 52 to translate for initial positioning. The oil pipe passes through the end-fixing assembly 2 and the centering assembly 3. The centering assembly 3 centers and clamps the middle section of the oil pipe, and the first hydraulic rod 22 in the end-fixing assembly 2 drives the upper support 23 to descend, so that the roller 24 is pressed against the outer wall of the oil pipe for positioning and guidance. Next, the first motor 64 in the end-cutting assembly 5 is started, which drives the rotating column 67 and the turntable 68 to rotate through the first gear 65 and the second gear 66. This causes the drive guide groove 681 to drive the inner fixing part 69 to move outward through the first guide column 692, causing the wheel 694 to press against the inner wall of the oil pipe to achieve internal expansion positioning. During this process... If there are impurities on the inner wall of the pipe, the spring 72 in the adaptive adjustment component 7 deforms and drives the third movable block 75 and the second movable block 693 to retract for adaptive buffer adjustment. Alternatively, the third movable block 75 can be limited by the limit column 85 pushed axially by the second hydraulic rod 81 to achieve rigid internal support positioning. After positioning, the centering component 3 drives the oil pipe to rotate and performs fixed-distance turning on the outer wall of the oil pipe through the feed turning part 4. Alternatively, the movable seat 54 can be driven by the second axial drive part 53 to make the two first tools 55 move towards each other for end face cutting. At the same time, the tool holder 98 can be raised and lowered by the gear part 97 driven by the second motor 91 so that the second tool 95 can be bored and cleaned on the inner wall of the oil pipe.

[0057] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A pipe end positioning turning device for repairing oil pipes and inner lining oil pipes, comprising a base (1), a centering assembly (3) fixed to the upper end of the base (1), and a feed turning part (4) slidably disposed on the upper end of the base (1) for axial movement, characterized in that: It also includes an end-fixing component (2) and an end-cutting component (5) disposed on the upper end of the base (1) and located on both sides of the centering component (3), wherein the end-cutting component (5) includes a seat (52) movably disposed on the base (1) and an end-cutting part disposed on one side of the seat (52) for cutting one end of the oil pipe; The seat (52) is provided with an inner fixing component (6), and the inner fixing component (6) includes a column (61) fixed to one side of the seat (52), a plurality of first movable grooves (62) opened on the outer surface of the column (61), an inner fixing part (69) slidably connected in the plurality of first movable grooves (62), a rotating column (67) rotatably connected inside the column (61) and a turntable (68) fixed outside the rotating column (67), a plurality of drive guide grooves (681) opened inside the turntable (68), a plurality of first guide posts (692) movably inserted in the drive guide grooves (681), and a drive component fixed to one side of the seat (52) for driving the rotating column (67) to rotate. One end of the plurality of first guide posts (692) is connected to the plurality of inner fixing parts (69).

2. The pipe end fixed-distance turning device for repairing oil pipes and inner lining oil pipes according to claim 1, characterized in that: The end-cutting assembly (5) further includes a first axial drive part (51) disposed in the base (1) and connected to the seat body (52) to drive the seat body (52) to move axially. The end-cutting part includes two movable seats (54) symmetrically slidably connected to one side of the seat body (52), a second axial drive part (53) disposed in the seat body (52) and connected to the two movable seats (54) to drive the two movable seats (54) to move towards each other, and two first cutters (55) respectively fixed to one side of the two movable seats (54).

3. The pipe end fixed-distance turning device for repairing oil pipes and inner lining oil pipes according to claim 1, characterized in that: The end-fixing assembly (2) includes a lower support (21) fixed to the upper end of the base (1), two first hydraulic rods (22) symmetrically fixed to the lower end of the lower support (21), an upper support (23) located above the lower support (21), and a plurality of rollers (24) rotatably disposed on the inner walls of the upper support (23) and the lower support (21). The telescopic end of the first hydraulic rod (22) passes through the lower support (21) and is fixed to the lower end of the upper support (23).

4. The pipe end fixed-distance turning device for repairing oil pipes and inner lining oil pipes according to claim 1, characterized in that: The drive assembly includes a frame (63) fixed to the other side of the base (52), a first gear (65) rotatably connected to the other side of the base (52) and a second gear (66) meshing with the first gear (65), a first motor (64) fixed to one side of the frame (63) with its output shaft passing through the frame (63) and fixedly connected to the first gear (65), and one end of the rotating column (67) passing through the base (52) and fixedly connected to the second gear (66).

5. The pipe end fixed-distance turning device for repairing oil pipes and inner lining oil pipes according to claim 4, characterized in that: The inner fixed part (69) includes a first movable block (691) that slides in the first movable groove (62), a second movable block (693) that is disposed on one end of the first movable block (691) that extends out of the first movable groove (62), and a wheel (694) that is rotatably connected to one side of the second movable block (693). One end of the first guide post (692) is fixedly connected to one side of the first movable block (691).

6. The pipe end fixed-distance turning device for repairing oil pipes and inner lining oil pipes according to claim 5, characterized in that: The first movable block (691) is also provided with an adaptation adjustment component (7). The adaptation adjustment component (7) includes a second movable groove (71) opened inside the first movable block (691), a third movable block (75) slidably connected in the second movable groove (71), a spring (72) provided in the second movable groove (71), two guide grooves (73) opened on one side of the first movable block (691), and two second guide posts (74) respectively movably inserted into the two guide grooves (73) and fixed at one end to one side of the second movable block (693). One end of the third movable block (75) passes through the first movable block (691) and is fixedly connected to one side of the second movable block (693). The two ends of the spring (72) are respectively connected to the inner wall of the second movable groove (71) and one side of the third movable block (75).

7. The pipe end fixed-distance turning device for repairing oil pipes and inner lining oil pipes according to claim 6, characterized in that: It also includes a limiting component (8), which includes a second hydraulic rod (81) fixed to one side of the frame (63), a push rod (86) movably inserted inside the rotating column (67), a plurality of third movable slots (82) opened on the outer surface of the rotating column (67), a sliding part (87) movably disposed in the third movable slot (82) and fixedly sleeved outside the push rod (86), a disc (83) movably disposed inside the rotating column (67) and rotatably connected to the outside of the sliding part (87), a slide seat (84) slidably connected to one side of the disc (83), and two limiting posts (85) fixed to one side of the slide seat (84). One end of the two limiting posts (85) passes through the adjacent first movable block (691) and enters the second movable slot (71) to limit the third movable block (75).

8. The pipe end fixed-distance turning device for repairing oil pipes and inner lining oil pipes according to claim 4, characterized in that: One end of the column (61) is provided with an in-pipe processing component (9). The in-pipe processing component (9) includes a fixed seat (93) fixed to one end of the column (61), a fourth movable groove (94) opened inside the fixed seat (93), a tool holder (98) slidably connected in the fourth movable groove (94), a second tool (95) fixed to the upper end of the tool holder (98), a gear part (97) set inside the fixed seat (93) to drive the tool holder (98) to rise and fall, a rotating rod (92) rotatably connected inside the column (61) and connected to the gear part (97), and a second motor (91) fixed to one side of the frame (63). The output shaft of the second motor (91) passes through the frame (63) and the seat (52) and is connected to one end of the rotating rod (92).

9. The pipe end fixed-distance turning device for repairing oil pipes and inner lining oil pipes according to claim 8, characterized in that: Two third guide posts (96) are fixedly connected to the inner wall of the fourth movable groove (94), and the tool holder (98) is movably sleeved on the outside of the two third guide posts (96).

10. The pipe end fixed-distance turning device for repairing oil pipes and inner lining oil pipes according to claim 8, characterized in that: The gear section (97) consists of two meshing transmission gears. The tool holder (98) has a tooth groove on one side that meshes with the transmission gear. One end of the rotating rod (92) is connected to one of the transmission gears.

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