Automatic cleaning mechanism for fouling of oil tubes

Abstract

The application provides a kind of automatic cleaning mechanism for oil pipe dirt, including electromagnetic heating device in straight line arrangement, cleaning station and end support device, the side close to cleaning station of end support device is equipped with overhanging shaft, overhanging shaft end is equipped in cleaning station, overhanging shaft end is equipped with internal cleaning device, internal cleaning device is equipped with circumferentially arranged internal nozzle, cleaning station is equipped with external cleaning device, external cleaning device is equipped with circumferentially arranged external nozzle, oil pipe passes through electromagnetic heating device and one end is sleeved on the outside of overhanging shaft, internal cleaning device and external cleaning device clean the inner wall and outer wall of oil pipe respectively, oil pipe below is also equipped with lifting traction unit in straight line interval arrangement, lifting traction unit includes liftable traction wheel, cleaning station both sides are also equipped with transverse limiting mechanism, solve the problem that oil pipe oil dirt is difficult to clean.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling pipe cleaning, and in particular to an automated dirt cleaning mechanism for oil pipes. Background Technology

[0002] Currently, there is a trend towards intelligent and automated processes in oil extraction, equipment maintenance, and transportation. Many oil fields have reached the middle and late stages of development, especially with the shift from water-drive to polymer flooding, resulting in severe problems of wax and scale buildup in oil wells. Scale buildup in pipelines narrows flow channels, increases pressure loss, reduces pipeline efficiency, and can even cause safety hazards such as tubing blockage and pump jamming.

[0003] Tubing cleaning is a crucial step in well workover operations. The quality and efficiency of the cleaning process are essential prerequisites for the successful implementation of subsequent tubing flaw detection and repair work, playing a vital role in ensuring oil well safety and improving economic efficiency. However, tubing scale is complex and diverse, containing substances such as oil, rust, crystalline salts, and crystalline wax, each with varying adsorption capacities. Currently, the widely used tubing cleaning methods in oilfields employ single cleaning parameters, making it difficult to completely remove all scale. Utility Model Content

[0004] This invention provides an automated cleaning mechanism for oil pipes, solving the problem of difficult-to-clean oil stains in oil pipes.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: an automated dirt cleaning mechanism for oil pipes, including electromagnetic heating devices arranged in a straight line, a cleaning station, and an end support device. The end support device has an extended shaft on the side near the cleaning station, and the end of the extended shaft is located at the cleaning station. An inner cleaning device is provided at the end of the extended shaft, and the inner cleaning device has circumferentially arranged inner nozzles. An outer cleaning device is provided in the cleaning station, and the outer cleaning device has circumferentially arranged outer nozzles. The oil pipe passes through the electromagnetic heating device and one end is sleeved on the outside of the extended shaft. The inner cleaning device and the outer cleaning device clean the inner wall and outer wall of the oil pipe, respectively. A lifting and traction unit arranged in a straight line at intervals is also provided below the oil pipe. The lifting and traction unit includes a liftable traction wheel. Lateral limiting mechanisms are also provided on both sides of the cleaning station.

[0006] In a preferred embodiment, an inner baffle device is also provided on the extended shaft near the inner cleaning device. The inner baffle device includes multiple inner scrapers arranged circumferentially, with the outer side of the inner scrapers abutting against the inner wall of the oil pipe. An outer scraper device is also provided at the cleaning station. The outer scraper device includes multiple outer scrapers arranged circumferentially, with the outer scrapers abutting against the outer wall of the oil pipe.

[0007] In the preferred embodiment, the inner scrapers are arranged overlapping in the circumferential direction, and a collar is sleeved on the outer side of the outer extension shaft. The collar is provided with multiple guide blocks in the circumferential direction. A slidable scraper sleeve is sleeved on the guide block. The scraper sleeve is connected to the side end of the inner scraper away from the inner cleaning device. The end of the guide block is provided with a groove structure. A spring is provided in the groove structure. The end of the spring abuts against the scraper sleeve. The guide block is provided with a hollow groove. A horizontal pin is provided on the side wall of the scraper sleeve. The horizontal pin is inserted into the hollow groove.

[0008] In the preferred embodiment, the end of the extended shaft is provided with a connecting segment, and the inner cleaning device is rotatably sleeved with the connecting segment. The inner cleaning device includes a connecting pipe and a nozzle. The connecting pipe is connected to the connecting segment. The nozzle is provided with multiple radial extension pipes along the circumference. The inner nozzle is located at the end of the radial extension pipe. The spray axis of the inner nozzle is arranged in a plane opposite to the rotation axis of the inner cleaning device. The spray recoil force of the inner nozzle drives the inner cleaning device to rotate.

[0009] In a preferred embodiment, the connecting segment has a cleaning fluid inlet pipe on the side wall of the inner baffle device away from the inner cleaning device.

[0010] In the preferred embodiment, the outer side of the connecting pipe is provided with a threaded adjusting sleeve, and the outer side of the adjusting sleeve is also fitted with a connecting ring. The connecting ring can rotate relative to the adjusting sleeve. A scraper rod is also provided, with hinged air springs at both ends of the scraper rod. Each air spring is hinged to the connecting ring. One end of the scraper rod is also provided with a hinged connecting rod, which is hinged to the spray head.

[0011] In the preferred embodiment, the outer wall of the connecting segment near the inner cleaning device is provided with a protruding ring, and ceramic sealing sleeves are fitted on both sides of the protruding ring. The port of the connecting pipe is provided with a sinking structure, and the ceramic sealing sleeve is fitted into the sinking structure. The port of the connecting pipe is also provided with a stop end sleeve, which abuts against the ceramic sealing sleeve.

[0012] In the preferred embodiment, the collar is provided with multiple guide bases along the circumference, the guide bases are provided with wheel frames, and the ends of the wheel frames are provided with rotatable abutment wheels, which roll against the inner wall of the oil pipe.

[0013] In the preferred embodiment, the lifting and traction unit includes a base frame, on which a liftable traction wheel frame is provided, a bearing seat is provided on the traction wheel frame, and a reduction motor is provided on one side of the traction wheel.

[0014] In a preferred embodiment, the lateral limiting mechanism includes a vertical frame, on which two lateral sliding frames that can move in opposite directions are provided, and the lateral sliding frames are provided with rotatable rolling wheels.

[0015] The beneficial effects of this utility model are as follows: by heating at high temperature to soften some of the grease, and then rapidly cooling down, the grease is separated from the pipe wall interface due to the difference in thermal expansion coefficients, achieving a good cleaning effect; compared with traditional handheld high-pressure water gun cleaning, it adopts an automated cleaning method of simultaneous internal and external cleaning, which is highly efficient and greatly improves safety; the external cleaning nozzles are densely arranged, and as the oil pipe is pulled and moved, the outer wall is cleaned in all directions without dead angles; the internal cleaning mechanism can rotate by the jet recoil force, which not only reduces the complexity requirements of its own mechanism, but also can perform spiral flushing of the inner wall of the oil pipe to avoid grease residue; the scraper rod of the internal cleaning device first breaks up the grease by rotating, and the remaining grease adhering to the inner wall of the oil pipe is scraped off by the internal scraper at the rear end, cleaning stubborn grease in layers and steps. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is an overall diagram of the cleaning system.

[0018] Figure 2 This is a side view of the cleaning system.

[0019] Figure 3 This is a structural diagram of the cleaning station.

[0020] Figure 4 This is a structural diagram of the lifting and traction unit.

[0021] Figure 5 This is a structural diagram of the internal support device and the internal baffle device.

[0022] Figure 6 This is a sectional view of the inner baffle device.

[0023] Figure 7 This is a schematic diagram of the external scraper device.

[0024] Figure 8 This is a structural diagram of the lateral limiting mechanism.

[0025] Figure 9 This is a structural diagram of the internal cleaning device.

[0026] Figure 10 This is a cross-sectional view of the internal cleaning device.

[0027] Figure 11 This is a schematic diagram of the internal cleaning device and the cleaning fluid inlet pipe at the rear end.

[0028] In the diagram: Electromagnetic heating device 1; Cleaning station 2; Cleaning chamber 201; Maintenance door 202; Inner chamber 203; Top cover 204; Channel hole 205; End support device 3; Outer shaft 301; Connecting segment 302; Protruding ring 303; Ceramic sealing sleeve 304; Lifting and traction unit 4; Traction wheel 401; Base frame 402; Guide rail slider mechanism 403; Lifting cylinder 404; Traction wheel frame 405; Bearing seat 406; Gear motor 407; Lateral limiting mechanism 5; Upright frame 501; Lateral moving frame 502; Rolling wheel 503; Linear top cylinder 504; Lateral moving guide rail mechanism 505; Oil pipe 6; External cleaning device 7; External nozzle 701; Liquid inlet 702; Internal cleaning device 8; Internal nozzle 801; Radial extension pipe 802; Connecting pipe section 803; Spray head 804; Scraper rod 805; Connecting ring 806; Adjusting sleeve 807; Connecting rod 808; Gas spring 809; Stop end sleeve 810; Internal baffle device 9; Internal scraper 901; Scraper sliding sleeve 902; Spring 903; Horizontal pin 904; Internal support device 10; Collar 1001; Guide block 1002; Guide base 1003; Wheel frame 1004; Abutment wheel 1005; Hollow groove 1006; External scraper device 11; External scraper 1101; Cleaning fluid inlet pipe 12. Detailed Implementation

[0029] like Figure 1-11 An automated cleaning mechanism for oil pipes includes an electromagnetic heating device 1, a cleaning station 2, and an end support device 3 arranged in a straight line. The end support device 3 has an extended shaft 301 on one side near the cleaning station 2. The end of the extended shaft 301 is located at the cleaning station 2 and has an inner cleaning device 8 at the end. The inner cleaning device 8 has circumferentially arranged inner nozzles 801. An outer cleaning device 7 is provided in the cleaning station 2. The outer cleaning device 7 has circumferentially arranged outer nozzles 701. The oil pipe 6 passes through the electromagnetic heating device 1 and one end is sleeved on the outside of the extended shaft 301. The inner cleaning device 8 and the outer cleaning device 7 clean the inner and outer walls of the oil pipe 6, respectively. Below the oil pipe 6, there are also lifting and traction units 4 arranged in a straight line at intervals. The lifting and traction units 4 include liftable traction wheels 401. Lateral limiting mechanisms 5 are also provided on both sides of the cleaning station 2.

[0030] The inner nozzle 801 is an off-center nozzle. Due to the large external space, it can be arranged in multiple directions to spray the outer wall of the oil pipe 6 in all directions without dead angles.

[0031] The traction wheel 401 is a V-shaped wheel, which can lift and raise the area below the oil pipe 6. Multiple lifting and traction units 4 are provided on both sides of the electromagnetic heating device 1. The rotation of the traction wheel 401 causes the oil pipe 6 to move to the right, passing through the electromagnetic heating device 1. The electromagnetic heating device 1 uses electromagnetic coils to perform segmented high-frequency heating of the oil pipe 6, softening some of the oil deposits. After heating, the oil pipe 6 moves towards the end support device 3 under the traction of the lifting and traction units 4, gradually passing through the hollow area in the center of the inner cleaning device 8, and fitting onto the outside of the inner baffle device 9. The outer nozzle 701 and inner nozzle 801 spray dry ice cleaning fluid onto the outer and inner walls of the oil pipe 6. The heated section of the oil pipe 6 cools rapidly. Due to the difference in thermal expansion coefficients between the oil deposits and the oil pipe, and under the action of impact, the oil deposits detach from the oil pipe wall.

[0032] The external cleaning device 7 is equipped with an annular body 702 with a liquid inlet, and an external nozzle 701 is mounted on it.

[0033] The cleaning station 2 is equipped with a cleaning box 201, and the cleaning box 201 is equipped with an inner chamber 203. The outer cleaning device 7 and the inner cleaning device 8 are both located in the inner chamber 203. Both ends of the inner chamber 203 are equipped with channel holes 205.

[0034] The cleaning chamber 201 has a maintenance door 202 that can be slid open upwards at the lower end, which can clean the accumulated oil and cleaning fluid. The cleaning chamber 201 also has an openable top cover 204.

[0035] In a preferred embodiment, an inner baffle device 9 is provided on the extended shaft 301 near the inner cleaning device 8. The inner baffle device 9 includes a plurality of inner scrapers 901 arranged circumferentially. The outer side of the inner scrapers 901 abuts against the inner wall of the oil pipe 6. An outer scraper device 11 is also provided at the cleaning station 2. The outer scraper device 11 includes a plurality of outer scrapers 1101 arranged circumferentially. The outer scrapers 1101 abut against the outer wall of the oil pipe 6.

[0036] The outer scraper device 11 adopts a multi-blade structure similar to a camera aperture, and the degree of inward retraction of the outer scraper 1101 can be controlled by a lever.

[0037] In the preferred embodiment, the inner scrapers 901 are arranged overlapping in the circumferential direction, and a collar 1001 is sleeved on the outer side of the outer extension shaft 301. The collar 1001 is provided with multiple guide blocks 1002 in the circumferential direction. A slidable scraper sleeve 902 is sleeved on the guide block 1002. The scraper sleeve 902 is connected to the side end of the inner scraper 901 away from the inner cleaning device 8. The end of the guide block 1002 is provided with a groove structure. A spring 903 is provided in the groove structure. The end of the spring 903 abuts against the scraper sleeve 902. The guide block 1002 is provided with a hollow groove 1006. A horizontal pin 904 is provided on the side wall of the scraper sleeve 902. The horizontal pin 904 is inserted into the hollow groove 1006.

[0038] The horizontal pin 904 is inserted into the side wall of the scraper sleeve 902 and can slide in the hollow groove 1006. The hollow groove 1006 limits the horizontal pin 904 so that the scraper sleeve 902 can extend and retract slightly, preventing the scraper sleeve 902 from falling out of the guide block 1002.

[0039] Under the holding force of spring 903, the outer side of the inner scraper 901 abuts against the inner wall of the oil pipe 6. The inner scraper 901 can float to avoid rigid contact that could damage the inner wall. It can not only remove the grease from the inner wall, but also stop the dry ice cleaning fluid. When the oil pipe 6 moves to the right, the inner scraper 901 prevents the dry ice cleaning fluid and grease mixture from moving to the right through the inner baffle device 9. When the oil pipe 6 moves to the right to the end, the dry ice cleaning fluid and grease mixture are discharged from the left end of the oil pipe 6.

[0040] The inner scraper 901 can be replaced with a matching specification according to the different diameter of the oil pipe 6.

[0041] In a preferred embodiment, the end of the extended shaft 301 is provided with a connecting segment 302, and the inner cleaning device 8 is rotatably sleeved with the connecting segment 302. The inner cleaning device 8 includes a connecting pipe 803 and a nozzle 804. The connecting pipe 803 is connected to the connecting segment 302. The nozzle 804 is provided with a plurality of radially extended pipes 802 along the circumference. The inner nozzle 801 is provided at the end of the radially extended pipe 802. The spray axis of the inner nozzle 801 is arranged in a non-plane with the rotation axis of the inner cleaning device 8. The spray recoil force of the inner nozzle 801 drives the inner cleaning device 8 to rotate.

[0042] In a preferred embodiment, the connecting segment 302 has a cleaning fluid inlet pipe 12 on the side wall of the inner baffle device 9 away from the inner cleaning device 8.

[0043] The cleaning fluid inlet pipe 12 is bound and limited on the outer extension shaft 301, so it will not interfere with the feed of the oil pipe 6.

[0044] Pressurized dry ice cleaning fluid is introduced into the connecting pipe 803 through the cleaning fluid inlet pipe 12. Simultaneously, the cleaning fluid is sprayed from the inner nozzle 801 into the oil pipe 6. Due to the presence of the radial extension pipe 802 and the spray force of the inner nozzle 801, the inner cleaning device 8 experiences a rotational torque. The greater the shear pressure, the greater the jet velocity, and the faster the rotation speed of the inner cleaning device 8. The inner cleaning device 8 cleans the inner wall of the oil pipe 6 while rotating, avoiding spray dead zones.

[0045] In a preferred embodiment, the outer side of the connecting pipe 803 is provided with a threaded adjusting sleeve 807, and the outer side of the adjusting sleeve 807 is also fitted with a connecting ring 806, which can rotate relative to the adjusting sleeve 807. A scraper rod 805 is also provided, and both ends of the scraper rod 805 are provided with hinged gas springs 809. Each gas spring 809 is hinged to the connecting ring 806. One end of the scraper rod 805 is also provided with a hinged connecting rod 808, which is hinged to the spray head 804.

[0046] The gas springs 809 at both ends of the scraper rod 805 can be different. The outer wall of the adjusting sleeve 807 is provided with an annular groove, and the connecting ring 806 is provided with a set screw. The set screw passes through the connecting ring 806 and is inserted into the annular groove. The adjustable sleeve 807 can be rotated to adjust the posture and position of the scraper rod 805 so that the scraper rod 805 is close to the inner wall of the oil pipe 6. When the inner cleaning device 8 rotates, the scraper rod 805 can rotate and break up some of the clumps of oil stains, reducing the scraping pressure of the inner baffle device 9.

[0047] In a preferred embodiment, the outer wall of the connecting segment 302 near the inner cleaning device 8 is provided with a protruding ring 303, and ceramic sealing sleeves 304 are fitted on both sides of the protruding ring 303. The port of the connecting pipe 803 is provided with a sinking structure, and the ceramic sealing sleeves 304 are fitted into the sinking structure. The port of the connecting pipe 803 is also provided with a stop end sleeve 810, which abuts against the ceramic sealing sleeves 304.

[0048] The stop sleeve 810 is threaded to the outer wall of the connecting pipe 803, and extends into the connecting pipe 803 to form a stop on the ceramic sealing sleeve 304, but does not compress it. The ceramic sealing sleeve 304 has the characteristics of wear resistance and low coefficient of friction, and has good dynamic sealing characteristics.

[0049] In a preferred embodiment, the collar 1001 is provided with a plurality of guide bases 1003 along the circumference, the guide base 1003 is provided with a wheel frame 1004, and the end of the wheel frame 1004 is provided with a rotatable abutment wheel 1005, which abuts against the inner wall of the oil pipe 6 and rolls.

[0050] The axis of the shaft of the abutment wheel 1005 is perpendicular to the axis of the oil pipe 6.

[0051] Because the cantilever of the extended shaft 301 is relatively long, in the initial stage, the traction wheel 401 below the extended shaft 301 near the cleaning station 2 needs to be lifted and held up until the oil pipe 6 moves to the right and is fitted into the inner support device 10. At this time, the left end of the extended shaft 301 is supported, and the traction wheel 401 can be lowered to a height that can lift the oil pipe 6.

[0052] In a preferred embodiment, the lifting and traction unit 4 includes a base frame 402, on which a liftable traction wheel frame 405 is provided, a bearing seat 406 is provided on the traction wheel frame 405, and a reduction motor 407 is provided on one side of the traction wheel 401.

[0053] The base frame 402 is equipped with a guide rail slider mechanism 403 and a lifting cylinder 404. The traction wheel frame 405 is slidably connected to the base frame 402 through the guide rail slider mechanism 403, and the lifting cylinder 404 lifts the traction wheel frame 405.

[0054] The traction wheel frame 405 is equipped with two bearing seats 406. The two ends of the rotating shaft of the traction wheel frame 405 are sleeved on the bearing seats 406, and the shaft end of the geared motor 407 is connected to the rotating shaft.

[0055] In a preferred embodiment, the lateral limiting mechanism 5 includes a stand 501, on which two lateral moving frames 502 that can move in opposite directions are provided, and on which rotatable rolling wheels 503 are provided.

[0056] The upright frame 501 is equipped with a transverse beam, on which a transverse guide rail mechanism 505 is mounted. The lower end of the transverse frame 502 is connected to the transverse guide rail mechanism 505. The transverse beam is equipped with a U-shaped lifting seat and a linear top cylinder 504 is installed to drive the transverse frame 502 to move laterally. The rolling wheels 503 are V-shaped wheels. The two rolling wheels 503 are centered and clamped together so that they can just contact the outer wall of the oil pipe 6, but do not obstruct the movement of the oil pipe 6.

[0057] The linear jacking cylinder 504 and the lifting cylinder 404 can be servo electric cylinders.

[0058] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. An automated dirt cleaning mechanism for oil pipes, characterized in that: The device includes an electromagnetic heating device (1) arranged in a straight line, a cleaning station (2) and an end support device (3). The end support device (3) has an extended shaft (301) on one side near the cleaning station (2). The end of the extended shaft (301) is located at the cleaning station (2). The end of the extended shaft (301) has an inner cleaning device (8). The inner cleaning device (8) has an inner nozzle (801) arranged in a circumferential direction. The cleaning station (2) has an outer cleaning device (7). The outer cleaning device (7) has an outer nozzle (701) arranged in a circumferential direction. The oil pipe (6) passes through the electromagnetic heating device (1) and one end is sleeved on the outside of the extended shaft (301). The inner cleaning device (8) and the outer cleaning device (7) clean the inner wall and outer wall of the oil pipe (6) respectively. Below the oil pipe (6), there is also a lifting traction unit (4) arranged in a straight line at intervals. The lifting traction unit (4) includes a lifting traction wheel (401). The cleaning station (2) is also provided with a lateral limiting mechanism (5) on both sides.

2. The automated dirt cleaning mechanism for oil pipes according to claim 1, characterized in that: An inner baffle device (9) is also provided on the extended shaft (301) near the inner cleaning device (8). The inner baffle device (9) includes multiple inner scrapers (901) arranged in the circumferential direction. The outer side of the inner scraper (901) abuts against the inner wall of the oil pipe (6). An outer scraper device (11) is also provided at the cleaning station (2). The outer scraper device (11) includes multiple outer scrapers (1101) arranged in the circumferential direction. The outer scrapers (1101) abut against the outer wall of the oil pipe (6).

3. The automated dirt cleaning mechanism for oil pipes according to claim 2, characterized in that: The inner scraper (901) is arranged in an overlapping manner in the circumferential direction. The outer extension shaft (301) is fitted with a collar (1001). The collar (1001) is provided with multiple guide blocks (1002) in the circumferential direction. A slidable scraper sleeve (902) is fitted on the guide block (1002). The scraper sleeve (902) is connected to the side end of the inner scraper (901) away from the inner cleaning device (8). The end of the guide block (1002) is provided with a groove structure. A spring (903) is provided in the groove structure. The end of the spring (903) abuts against the scraper sleeve (902). The guide block (1002) is provided with a hollow groove (1006). A horizontal pin (904) is provided on the side wall of the scraper sleeve (902). The horizontal pin (904) is inserted into the hollow groove (1006).

4. The automated dirt cleaning mechanism for oil pipes according to claim 1, characterized in that: The end of the extended shaft (301) is provided with a connecting segment (302). The inner cleaning device (8) is rotatably connected to the connecting segment (302). The inner cleaning device (8) includes a connecting pipe (803) and a nozzle (804). The connecting pipe (803) is connected to the connecting segment (302). The nozzle (804) is provided with multiple radial extension pipes (802) along the circumference. The inner nozzle (801) is located at the end of the radial extension pipe (802). The spray axis of the inner nozzle (801) is arranged in a non-plane manner with the rotation axis of the inner cleaning device (8). The spray recoil force of the inner nozzle (801) drives the inner cleaning device (8) to rotate.

5. The automated dirt cleaning mechanism for oil pipes according to claim 4, characterized in that: The connecting segment (302) has a cleaning fluid inlet pipe (12) on the side wall of the inner baffle device (9) away from the inner cleaning device (8).

6. The automated dirt cleaning mechanism for oil pipes according to claim 4, characterized in that: The outer side of the connecting pipe (803) is provided with a threaded adjustment sleeve (807), and the outer side of the adjustment sleeve (807) is also provided with a connecting ring (806). The connecting ring (806) can rotate relative to the adjustment sleeve (807). A scraper rod (805) is also provided. Both ends of the scraper rod (805) are provided with hinged air springs (809). Each air spring (809) is hinged to the connecting ring (806). One end of the scraper rod (805) is also provided with a hinged connecting rod (808). The connecting rod (808) is hinged to the spray head (804).

7. The automated dirt cleaning mechanism for oil pipes according to claim 4, characterized in that: The connecting segment (302) has a raised ring (303) on the outer wall of one end near the inner cleaning device (8). Ceramic sealing sleeves (304) are fitted on both sides of the raised ring (303). The port of the connecting pipe (803) has a sinking structure. The ceramic sealing sleeve (304) is fitted into the sinking structure. The port of the connecting pipe (803) also has a stop end sleeve (810), which abuts against the ceramic sealing sleeve (304).

8. The automated dirt cleaning mechanism for oil pipes according to claim 3, characterized in that: The collar (1001) is provided with multiple guide bases (1003) along the circumference. The guide base (1003) is provided with a wheel frame (1004). The end of the wheel frame (1004) is provided with a rotatable abutment wheel (1005). The abutment wheel (1005) rolls against the inner wall of the oil pipe (6).

9. The automated dirt cleaning mechanism for oil pipes according to claim 1, characterized in that: The lifting traction unit (4) includes a base frame (402), a liftable traction wheel frame (405) is provided on the base frame (402), a bearing seat (406) is provided on the traction wheel frame (405), and a reduction motor (407) is provided on one side of the traction wheel (401).

10. The automated dirt cleaning mechanism for oil pipes according to claim 1, characterized in that: The lateral limiting mechanism (5) includes a stand (501), on which two lateral moving frames (502) are provided that can move in opposite directions, and on which rotatable rolling wheels (503) are provided.

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