Centrifugal full-hole grinding and milling tool for oil well overhaul and using method of centrifugal full-hole grinding and milling tool

Abstract

The invention discloses a centrifugal full-hole grinding and milling tool for oil well overhaul and a using method of the centrifugal full-hole grinding and milling tool, and relates to the technical field of well workover tools, the centrifugal full-hole grinding and milling tool comprises a centrifugal full-hole grinding and milling tool assembly, an angle adjusting assembly and a fixing mechanism, and the angle adjusting assembly comprises a mounting frame, a Y-axis angle adjusting mechanism and an X-axis angle adjusting mechanism; the Y-axis angle adjusting mechanism and the X-axis angle adjusting mechanism are both arranged on the mounting frame, the Y-axis angle adjusting mechanism is used for adjusting the angle of the centrifugal full-hole milling tool assembly in the Y-axis direction, and the X-axis angle adjusting mechanism is used for adjusting the angle of the centrifugal full-hole milling tool assembly in the X-axis direction; the fixing mechanism is arranged in front of the angle adjusting assembly, and the automatic centering locking action of the centrifugal full-hole grinding and milling tool assembly is achieved through the fixing mechanism; according to the tool, the angle of the centrifugal full-hole grinding and milling tool assembly can be adjusted in the Y-axis direction and the X-axis direction through the angle adjusting assembly so as to adapt to different working requirements and the shapes of the inner walls of pipelines.

Description

Technical Field

[0001] The invention relates to the technical field of well repair tools, and in particular to a centrifugal full-eye milling tool for oil well overhaul and a use method thereof. Background Art

[0002] The centrifugal full-eye grinding and milling tool for oil well overhaul is a special tool used for oil well maintenance and repair. During the oil well production process, due to long-term use, gravel intrusion or other reasons, the inside of the oil well pipeline may be blocked or damaged. At this time, overhaul operations are required to remove or repair obstacles or damaged parts in the pipeline.

[0003] The centrifugal full-eye milling tool is a rotary tool that cuts and removes blockages or damaged sections within oil well pipes by rotating at high speed and applying pressure. It is designed to effectively restore the passage and flow of oil wells during the repair process.

[0004] The tool usually consists of a solid metal base and carbide or ceramic cutting particles. The cutting particles are fixed to the surface of the base and usually have sharp cutting edges. When the tool rotates, these cutting particles can cut and remove obstacles such as scale, mud, garbage, etc. in the pipe.

[0005] Chinese patent CN202121525856.2 discloses a centrifugal full-eye milling tool for oil well overhaul, including a milling assembly and an adjustment assembly; the adjustment assembly is fixed inside the milling assembly, and the adjustment assembly includes a fixed disk, a square groove, a square rod, a threaded rod, a sliding disk, a trigger switch, a rotating rod, a rotating disk, a positioning rod, and a positioning groove; the device solves the problem of being unable to determine whether the milling part is in contact with the pipe wall, but lacks an angle adjustment function.

[0006] The existing centrifugal full-eye milling tools for oil well overhaul have the following problems in the process of trimming the inner wall of the oil well pipeline due to the lack of angle adjustment function: Poor milling effect: Due to the inability to flexibly adjust the tool angle, the centrifugal full-eye milling tool may not be able to completely cover every corner and concave and convex surface of the inner wall of the oil well pipeline, affecting the uniformity and quality of milling. This will affect the patency of the oil well pipeline and the production efficiency of oil and gas.

[0007] Low dressing efficiency: If the inner wall of the oil well pipe has special bends or complex structures, the centrifugal full-eye milling tool without angle adjustment function may not be suitable for dressing, requiring more time and manpower to complete the dressing work, reducing the dressing efficiency and product quality.

[0008] Shortened tool life: Using an inappropriate tool angle for dressing will accelerate the wear and breakage of centrifugal milling tools, resulting in shortened tool life, more frequent tool replacements, and increased maintenance costs. Summary of the invention

[0009] The purpose of the present invention is to address the defects of the prior art and provide a centrifugal full-eye grinding and milling tool for oil well overhaul and a method of using the same.

[0010] The technical solution of the present invention is: a centrifugal full-eye milling tool for oil well overhaul, comprising a centrifugal full-eye milling tool assembly, the centrifugal full-eye milling tool assembly is composed of an integrally formed milling head and a milling body; and also includes an angle adjustment assembly and a fixing mechanism; The angle adjustment assembly includes a mounting frame, a Y-axis angle adjustment mechanism and an X-axis angle adjustment mechanism, both of which are arranged on the mounting frame, the Y-axis angle adjustment mechanism includes a Y-axis limit plate, and the centrifugal full-eye grinding and milling tool assembly is adjusted in the Y-axis direction by the Y-axis angle adjustment mechanism; the X-axis angle adjustment mechanism includes an X-axis limit plate, and the centrifugal full-eye grinding and milling tool assembly is adjusted in the X-axis direction by the X-axis angle adjustment mechanism; The fixing mechanism is arranged in front of the angle adjustment component and comprises a plurality of clamping claws; the fixing mechanism is used to realize an automatic centering locking action on the centrifugal full-eye milling tool component.

[0011] Preferably, the angle adjustment assembly also includes a connecting rod, a slider, a limiting ball, a moving block and a moving rod, one end of the connecting rod is installed at the front center of the mounting frame, and the other end is fixedly connected to the slider; a first slide groove and a second slide groove are provided on the surface of the limiting ball, the slider is slidably installed in the first slide groove, the moving block is slidably installed in the second slide groove, and its outer surface is fixedly connected to the moving rod; the Y-axis limiting plate and the X-axis limiting plate are both semicircular.

[0012] Preferably, the Y-axis angle adjustment mechanism also includes a Y-axis servo motor fixedly mounted below the mounting frame, the output end of the Y-axis servo motor is fixedly connected to the lower end of the Y-axis limit plate through the Y-axis transmission shaft, the upper end of the Y-axis limit plate is rotatably mounted on the top of the mounting frame through a first connecting shaft, and the axes of the first connecting shaft, the limiting ball, the Y-axis limiting plate, the Y-axis transmission shaft and the Y-axis servo motor are all located on the same straight line; the X-axis angle adjustment mechanism also includes an X-axis servo motor fixedly mounted on the right side surface of the mounting frame, the output shaft of the X-axis servo motor is fixedly connected to the right end of the X-axis limit plate through the X-axis transmission shaft, the left end of the X-axis limit plate is rotatably mounted on the left side of the mounting frame through a second connecting shaft, and the axes of the second connecting shaft, the limiting ball, the X-axis limiting plate, the X-axis transmission shaft and the X-axis servo motor are all located on the same straight line.

[0013] Preferably, the inner wall of the slide groove of the Y-axis limit plate and the inner wall of the slide groove of the X-axis limit plate are both slidably connected to the outer wall of the moving rod.

[0014] Preferably, the front end of the moving rod is fixedly connected with a mounting block, the front side of the mounting block is fixedly mounted with a driving motor, the fixing mechanism also includes a fixing block fixedly mounted on the output end of the driving motor, the front side of the fixing block is provided with a mounting cavity, a track disk is rotatably mounted in the mounting cavity, the front side of the track disk is provided with a plurality of track grooves distributed in a circular array, the front side of the fixing block is provided with a fixing plate, the fixing plate is provided with a plurality of moving slide grooves distributed in a circular array, the clamping claw is slidably mounted in the moving slide groove, and its back is slidably mounted in the track groove; a push rod is fixed on the side wall of the track disk, an arc cylinder is fixedly mounted on the side wall of the fixing block, and the end of the piston rod of the arc cylinder is fixedly connected to the push rod.

[0015] A method for preparing a centrifugal full-eye milling tool assembly comprises the following steps: S1. Material preparation: Select H13 alloy steel, graphene, hexagonal boron nitride and high entropy alloy; S2. Set processing parameters: Set the parameters for laser processing for each material and overall design; S3, laser melting prototype processing: using a laser melting prototype machine to process the material to be processed selected in S1 according to the shape and size of the centrifugal full-eye milling tool assembly set in advance, to obtain a centrifugal full-eye milling tool assembly; S4. Heat treatment: After the centrifugal full-eye milling tool assembly is prepared, annealing and solution treatment are performed.

[0016] Preferably, the mass fractions of the components in S1 are: 60-70 parts of H13 alloy steel, 10-15 parts of graphene, 5-10 parts of hexagonal boron nitride, and 5-10 parts of high entropy alloy; The parameters of the laser processing in S2 are set as follows: laser power 100-500 W, scanning speed 100-1000 mm / s, pulse frequency 10-100 kHz, weld width 0.2-2.0 mm, weld depth 0.1-2.0 mm, and the scanning trajectory is set to grid scanning.

[0017] A method for using a centrifugal full-eye milling tool for oil well overhaul comprises the following steps: Step 1: Place the centrifugal full-eye grinding and milling tool assembly between multiple clamping jaws, control the piston rod of the arc cylinder to extend through the external control terminal, and the piston rod drives the track plate to rotate clockwise with the axis of the fixed block as the center of the circle through the push rod, driving the clamping jaws to clamp from the outside to the inside along the curved track of the track groove in the moving slide groove, thereby realizing the automatic centering locking action of the centrifugal full-eye grinding and milling tool assembly; Step 2: When the inner wall of the oil well pipeline needs to be trimmed, the driving motor is controlled to start, and the driving motor drives the fixed block to rotate, thereby driving the centrifugal full-eye milling tool assembly to start trimming the inner wall of the oil well pipeline; Step 3: When the centrifugal full-eye grinding and milling tool assembly needs to be adjusted in angle, the Y-axis servo motor is controlled to start, and the Y-axis servo motor drives the Y-axis limit plate to rotate with the axis of the first connecting shaft as the center of the circle through the Y-axis transmission shaft, thereby adjusting the angle of the centrifugal full-eye grinding and milling tool assembly in the Y-axis direction; The X-axis servo motor is controlled to start, and the X-axis servo motor drives the X-axis limit plate to rotate with the axis of the second connecting shaft as the center of the circle through the X-axis transmission shaft, thereby realizing the angle adjustment action of the centrifugal full-eye milling tool assembly in the X-axis direction; The angle of the centrifugal full-eye milling tool assembly is adjusted by the cooperation of the Y-axis servo motor and the X-axis servo motor to adapt to different working requirements and the shape of the inner wall of the pipeline.

[0018] Compared with the prior art, the present invention has the following advantages: Through the cooperation of the Y-axis angle adjustment mechanism and the X-axis angle adjustment mechanism, the centrifugal full-eye grinding and milling tool assembly can achieve angle adjustment in the Y-axis and X-axis directions to adapt to different work requirements and the shape of the inner wall of the pipeline, improve the uniformity and quality of the dressing operation, and at the same time improve the efficiency and accuracy of the operation, thereby solving the problem that the existing centrifugal full-eye grinding and milling tools for oil well overhaul lack the angle adjustment function.

[0019] The tool is capable of realizing an automatic centering locking action on the centrifugal full-eye milling tool assembly by arranging a fixing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 is a perspective view of the angle adjustment assembly; Figure 3 A perspective view of the rear side of the angle adjustment assembly; Figure 4 It is a structural schematic diagram of the fixing mechanism; Figure 5 It is the structural exploded diagram of the fixing mechanism; Figure 6 A three-dimensional diagram of the track disk.

[0021] In the figure, 1, mounting frame, 2, centrifugal full-eye milling tool assembly, 3, Y-axis limit plate, 31, Y-axis servo motor, 32, connecting rod, 33, slider, 34, moving block, 35, moving rod, 36, Y-axis transmission shaft, 37, first connecting shaft, 38, limit ball, 4, X-axis limit plate, 41, X-axis servo motor, 42, X-axis transmission shaft, 43, second connecting shaft, 44, mounting block, 45, drive motor, 46, rotating shaft, 5, clamping claw, 51, fixed block, 52, track disk, 53, track groove, 54, mounting cavity, 55, fixed plate, 56, moving slide groove, 57, push rod, 58, arc cylinder, 6, first slide groove, 7, second slide groove. DETAILED DESCRIPTION

[0022] The present invention is further described below with reference to the accompanying drawings and embodiments. Embodiment 1

[0023] Reference Figure 1 As shown, a centrifugal full-eye milling tool for oil well overhaul includes a centrifugal full-eye milling tool assembly 2, which is composed of an integrally formed milling head and a milling body; it also includes an angle adjustment assembly and a fixing mechanism.

[0024] The angle adjustment assembly includes a mounting frame 1, a Y-axis angle adjustment mechanism and an X-axis angle adjustment mechanism. The Y-axis angle adjustment mechanism and the X-axis angle adjustment mechanism are both arranged on the mounting frame 1. The Y-axis angle adjustment mechanism includes a Y-axis limit plate 3, through which the centrifugal full-eye grinding and milling tool assembly 2 is angle-adjusted in the Y-axis direction; the X-axis angle adjustment mechanism includes an X-axis limit plate 4, through which the centrifugal full-eye grinding and milling tool assembly 2 is angle-adjusted in the X-axis direction.

[0025] The fixing mechanism is arranged in front of the angle adjustment assembly, and comprises three clamping jaws 5; the fixing mechanism is used to realize the automatic centering locking action of the centrifugal full-eye grinding and milling tool assembly 2.

[0026] Through the combination of the above mechanisms, the centrifugal full-eye grinding and milling tool assembly 2 can achieve angle adjustment in the Y-axis and X-axis directions to adapt to the different shapes and angle requirements of the inner wall of the wellbore for trimming. At the same time, the multiple jaws 5 of the fixing mechanism ensure that the centrifugal full-eye grinding and milling tool assembly 2 is stably positioned and locked, thereby improving the accuracy and safety of the operation. Such a design structure can effectively improve the uniformity and quality of the trimming operation, and improve the efficiency of the operation. Embodiment 2

[0027] As a preferred embodiment of the present invention, this embodiment optimizes the structure of the angle adjustment component based on the first embodiment, specifically: Reference Figure 2-3As shown, the angle adjustment assembly also includes a connecting rod 32, a slider 33, a limiting ball 38, a moving block 34 and a moving rod 35. One end of the connecting rod 32 is installed at the front center of the mounting frame 1, and the other end is fixedly connected to the slider 33; a first slide groove 6 and a second slide groove 7 are provided on the surface of the limiting ball 38, the slider 33 is slidably installed in the first slide groove 6, and the moving block 34 is slidably installed in the second slide groove 7, and its outer surface is fixedly connected to the moving rod 35; the Y-axis limiting plate 3 and the X-axis limiting plate 4 are both semicircular.

[0028] The Y-axis angle adjustment mechanism also includes a Y-axis servo motor 31 fixedly installed below the mounting frame 1, the output end of the Y-axis servo motor 31 is fixedly connected to the lower end of the Y-axis limit plate 3 through the Y-axis transmission shaft 36, and the upper end of the Y-axis limit plate 3 is rotatably installed on the top of the mounting frame 1 through the first connecting shaft 37, and the axes of the first connecting shaft 37, the limiting ball 38, the Y-axis limiting plate 3, the Y-axis transmission shaft 36 and the Y-axis servo motor 31 are all located on the same straight line; the X-axis angle adjustment mechanism also includes an X-axis servo motor 41 fixedly installed on the right side surface of the mounting frame 1, the output shaft of the X-axis servo motor 41 is fixedly connected to the right end of the X-axis limit plate 4 through the X-axis transmission shaft 42, and the left end of the X-axis limit plate 4 is rotatably installed on the left side of the mounting frame 1 through the second connecting shaft 43, and the axes of the second connecting shaft 43, the limiting ball 38, the X-axis limiting plate 4, the X-axis transmission shaft 42 and the X-axis servo motor 41 are all located on the same straight line.

[0029] The inner wall of the slide groove of the Y-axis limit plate 3 and the inner wall of the slide groove of the X-axis limit plate 4 are both slidably connected to the outer wall of the moving rod 35 . Embodiment 3

[0030] As a preferred embodiment of the present invention, this embodiment optimizes the structure of the fixing mechanism on the basis of the second embodiment, specifically: Reference Figure 4-6 As shown, the front end of the moving rod 35 is fixedly connected with a mounting block 44, and a driving motor 45 is fixedly mounted on the front of the mounting block 44. The fixing mechanism also includes a fixing block 51 fixedly mounted on the rotating shaft 46 at the output end of the driving motor 45. A mounting cavity 54 is provided on the front of the fixing block 51, and a track disk 52 is rotatably mounted in the mounting cavity 54. The track disk 52 is provided with three track grooves 53 distributed in a circular array on the front. A fixing plate 55 is installed on the front of the fixing block 51, and three moving slide grooves 56 distributed in a circular array are provided on the fixing plate 55. The clamping jaw 5 is slidably mounted in the moving slide groove 56, and its back is slidably mounted in the track groove 53; a push rod 57 is fixed on the side wall of the track disk 52, and an arc cylinder 58 is fixedly mounted on the side wall of the fixing block 51, and the end of the piston rod of the arc cylinder 58 is fixedly connected to the push rod 57.

[0031] A method for using a centrifugal full-eye milling tool for oil well overhaul comprises the following steps: Step 1: Place the centrifugal full-eye grinding and milling tool assembly 2 between the three clamping jaws 5, and control the piston rod of the arc cylinder 58 to extend through the external control terminal. The piston rod drives the track plate 52 to rotate clockwise with the axis of the fixed block 51 as the center through the push rod 57, driving the clamping jaws 5 to clamp from the outside to the inside along the curved track of the track groove 53 in the moving slide groove 56, so as to realize the automatic centering locking action of the centrifugal full-eye grinding and milling tool assembly 2; Step 2: When the inner wall of the oil well pipeline needs to be trimmed, the driving motor 45 is controlled to start, and the driving motor 45 drives the fixed block 51 to rotate, thereby driving the centrifugal full-eye milling tool assembly 2 to start trimming the inner wall of the oil well pipeline; Step 3: When the centrifugal full-eye milling tool assembly 2 needs to be adjusted in angle, the Y-axis servo motor 31 is controlled to start, and the Y-axis servo motor 31 drives the Y-axis limit plate 3 to rotate with the axis of the first connecting shaft 37 as the center of the circle through the Y-axis transmission shaft 36, thereby adjusting the angle of the centrifugal full-eye milling tool assembly 2 in the Y-axis direction (at this time, the moving block 34 slides in the second slide groove 7 of the limit ball 38); The X-axis servo motor 41 is controlled to start, and the X-axis servo motor 41 drives the X-axis limit plate 4 to rotate around the axis of the second connecting shaft 43 through the X-axis transmission shaft 42, thereby realizing an angle adjustment action on the centrifugal full-eye milling tool assembly 2 in the X-axis direction (at this time, the slider slides in the first slide groove 6 of the limit ball 38); The angle of the centrifugal full-eye milling tool assembly 2 is adjusted by the cooperation of the above-mentioned Y-axis servo motor 31 and the X-axis servo motor 41 to adapt to different working requirements and the shape of the inner wall of the pipeline, improve the uniformity and quality of the finishing effect, and at the same time improve the efficiency and accuracy of the operation. Embodiment 4

[0032] The preparation method of the centrifugal full-eye milling tool assembly 2 comprises the following steps: S1. Material preparation: Select H13 alloy steel, graphene, hexagonal boron nitride and high entropy alloy; S2. Set processing parameters: Set the parameters for laser processing for each material and overall design; S3, laser melting prototype processing: using a laser melting prototype machine to process the material to be processed selected in S1 according to the pre-set shape and size of the centrifugal full-eye milling tool assembly 2, to obtain the centrifugal full-eye milling tool assembly 2; S4, heat treatment: after the centrifugal full-eye milling tool assembly 2 is prepared, annealing and solution treatment are performed.

[0033] The centrifugal full-eye grinding and milling tool assembly 2 is prepared by using laser manufacturing technology. Compared with traditional manufacturing methods, it has higher precision, flexible shape design, a wide range of material selection and higher production efficiency. These advantages can bring better tool performance and higher production benefits. Embodiment 5

[0034] As a preferred embodiment of the present invention, this embodiment further designs the fourth embodiment, specifically: The mass proportions of the components in S1 are: 60-70 parts of H13 alloy steel, 10-15 parts of graphene, 5-10 parts of hexagonal boron nitride, and 5-10 parts of high entropy alloy.

[0035] The parameters of laser processing in S2 were set as follows: laser power 100-500 W, scanning speed 100-1000 mm / s, pulse frequency 10-100 kHz, weld width 0.2-2.0 mm, weld depth 0.1-2.0 mm, and the scanning trajectory was set to grid scanning.

[0036] The present invention is not limited to the above-mentioned embodiments. Various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention. The changed contents still fall within the protection scope of the present invention.

Claims

1. A centrifugal full-eye milling tool for major oil well repairs, comprising a centrifugal full-eye milling tool assembly, which is composed of a mill bit and a milling body integrally formed; Characterized in that: It further includes an angle adjustment assembly and a fixing mechanism; The angle adjustment assembly includes a mounting frame, a Y-axis angle adjustment mechanism and an X-axis angle adjustment mechanism. The Y-axis angle adjustment mechanism and the X-axis angle adjustment mechanism are both arranged on the mounting frame. The Y-axis angle adjustment mechanism includes a Y-axis limit plate, and the centrifugal full-eye milling tool assembly is adjusted in the Y-axis direction through the Y-axis angle adjustment mechanism; the X-axis angle adjustment mechanism includes an X-axis limit plate, and the centrifugal full-eye milling tool assembly is adjusted in the X-axis direction through the X-axis angle adjustment mechanism; The fixing mechanism is arranged in front of the angle adjustment assembly and includes a plurality of jaws; the centrifugal full-eye milling tool assembly is automatically centered and locked through the fixing mechanism.

2. The centrifugal full-eye milling tool for major oil well repairs according to claim 1, Characterized in that: The angle adjustment assembly further includes a connecting rod, a slider, a limiting ball, a moving block and a moving rod. One end of the connecting rod is installed at the center of the front surface of the mounting frame, and the other end is fixedly connected to the slider; the surface of the limiting ball is provided with a first chute and a second chute. The slider is slidably installed in the first chute, and the moving block is slidably installed in the second chute, and its outer surface is fixedly connected to the moving rod; both the Y-axis limit plate and the X-axis limit plate are semi-circular.

3. The centrifugal full-eye milling tool for major oil well repairs according to claim 2, Characterized in that: The Y-axis angle adjustment mechanism further includes a Y-axis servo motor fixedly installed below the mounting frame. The output end of the Y-axis servo motor is fixedly connected to the lower end of the Y-axis limit plate through a Y-axis transmission shaft. The upper end of the Y-axis limit plate is rotatably installed at the top of the mounting frame through a first connecting shaft. The axes of the first connecting shaft, the limiting ball, the Y-axis limit plate, the Y-axis transmission shaft and the Y-axis servo motor are all on the same straight line; the X-axis angle adjustment mechanism further includes an X-axis servo motor fixedly installed on the right side surface of the mounting frame. The output shaft of the X-axis servo motor is fixedly connected to the right end of the X-axis limit plate through an X-axis transmission shaft. The left end of the X-axis limit plate is rotatably installed on the left side of the mounting frame through a second connecting shaft. The axes of the second connecting shaft, the limiting ball, the X-axis limit plate, the X-axis transmission shaft and the X-axis servo motor are all on the same straight line.

4. The centrifugal full-eye milling tool for major oil well repairs according to claim 3, Characterized in that: The inner walls of the chutes of the Y-axis limit plate and the inner walls of the chutes of the X-axis limit plate are both slidably connected to the outer wall of the moving rod.

5. The centrifugal full-eye milling tool for major oil well repairs according to claim 4, Characterized in that: A mounting block is fixedly connected to the front end of the movable rod. A driving motor is fixedly installed on the front surface of the mounting block. The fixing mechanism further includes a fixing block fixedly installed at the output end of the driving motor. An installation cavity is formed on the front surface of the fixing block. A track disk is rotatably installed in the installation cavity. A plurality of track grooves distributed in a circumferential array are formed on the front surface of the track disk. A fixing plate is installed on the front surface of the fixing block. A plurality of moving sliding grooves distributed in a circumferential array are formed on the fixing plate. The clamping jaws are slidably installed in the moving sliding grooves, and their backs are slidably installed in the track grooves. A push rod is fixed to the side wall of the track disk. An arc-shaped air cylinder is fixedly installed on the side wall of the fixing block. The end of the piston rod of the arc-shaped air cylinder is fixedly connected to the push rod.

6. The preparation method of the centrifugal full-eye milling tool assembly according to claim 1, characterized in that, comprises the following steps: S1. Material preparation: Select H13 alloy steel, graphene, hexagonal boron nitride and high-entropy alloy; S2. Set processing parameters: Set the parameters during laser processing for each material and the overall design; S3. Laser melting prototyping machine processing: Use the laser melting prototyping machine equipment to process the to-be-processed materials selected in S1 according to the pre-set shape and size of the centrifugal full-eye milling tool assembly to obtain the centrifugal full-eye milling tool assembly; S4. Heat treatment: After the centrifugal full-eye milling tool assembly is prepared, perform annealing and solution treatment.

7. The preparation method of the centrifugal full-eye milling tool assembly according to claim 6, characterized in that: The mass fractions of each component in S1 are: 60-70 parts of H13 alloy steel, 10-15 parts of graphene, 5-10 parts of hexagonal boron nitride, and 5-10 parts of high-entropy alloy; The parameters during laser processing in S2 are respectively set as: laser power 100-500 watts, scanning speed 100-1000 mm / s, pulse frequency 10-100 kHz, weld width 0.2-2.0 mm, weld depth 0.1-2.0 mm, and the scanning track is set as grid scanning.

8. The use method of a centrifugal full-eye milling tool for major oil well repairs according to claim 5, characterized in that, comprises the following steps: Step 1: Place the centrifugal full-eye milling tool assembly between a plurality of clamping jaws. Control the piston rod of the arc-shaped air cylinder to extend through an external control terminal. The piston rod drives the track disk to rotate clockwise around the axis of the fixing block through the push rod, driving the clamping jaws to clamp inward along the curve track of the track groove in the moving sliding groove, and realizing an automatic centering and locking action on the centrifugal full-eye milling tool assembly; Step 2: When it is necessary to repair the inner wall of the oil well pipeline, control the driving motor to start. The driving motor drives the fixing block to rotate, thereby driving the centrifugal full-eye milling tool assembly to start repairing the inner wall of the oil well pipeline; Step 3: When it is necessary to adjust the angle of the centrifugal full-eye milling tool assembly, control the Y-axis servo motor to start. The Y-axis servo motor drives the Y-axis limiting plate to rotate around the axis of the first connecting shaft through the Y-axis transmission shaft, thereby realizing an angle adjustment action in the Y-axis direction on the centrifugal full-eye milling tool assembly; Control the start of the X-axis servo motor. The X-axis servo motor drives the X-axis limit plate to rotate around the axis of the second connecting shaft through the X-axis transmission shaft, thereby realizing the angle adjustment action of the centrifugal full-eye milling tool assembly in the X-axis direction; Adjust the angle of the centrifugal full-eye milling tool assembly through the cooperation of the above Y-axis servo motor and X-axis servo motor to adapt to different working requirements and the shape of the inner wall of the pipeline.

Images