Expanding milling shoe for casing damage well and machining equipment of expanding milling shoe

Abstract

The invention discloses a casing damage well expanding milling shoe and machining equipment thereof, belongs to the technical field of milling shoes, and aims to solve the problems that a protruding position in a casing is easy to punch through, a hole is formed, and the pressure bearing capacity of the casing is reduced. The casing damage well expanding milling shoe comprises a shell, an opening is formed in the top face of the shell, a fixing strip is fixed in the shell, and one side face of the fixing strip is movably connected with an inner pipe; an inner column is arranged in the inner pipe, a friction head is fixed to one end of the inner column, a push column is fixed to the other end of the inner column, two clamping grooves are formed in the outer side wall of the inner column, and two clamping strips are fixed to the inner side wall of the inner pipe; through the cutting teeth, after the positions of the protrusions are pushed to reset, wrinkles at the positions of the reset protrusions can be polished by the cutting teeth by rotating the shell, so that the inner wall of the whole sleeve is smoother, and the situation that when a conical diameter-expanding milling shoe is adopted for polishing the positions of the protrusions in the sleeve, the positions of the protrusions are prone to being punched, and the machining efficiency is improved is avoided. Holes are formed, and the pressure bearing capacity of the casing pipe is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of grinding shoes, and particularly relates to a casing damage well expanding grinding shoe and a processing equipment thereof. BACKGROUND

[0002] The existing casing damage well expanding grinding shoe is used for expanding the casing in the casing damage well. The conical expanding grinding shoe is used for grinding the protrusion in the casing, so that the protrusion position is ground, and the casing is repaired. However, due to the effect of the foundation rock, in some cases, the width of the protrusion is large, so that the protrusion position is broken after grinding by the grinding shoe, a hole is formed at the position corresponding to the protrusion on the casing wall, and the pressure bearing capacity of the casing is reduced.

[0003] Therefore, there is a need for a casing damage well expanding grinding shoe and a processing equipment thereof to solve the problem that the protrusion position in the casing is easily broken to form a hole and reduce the pressure bearing capacity of the casing. SUMMARY

[0004] The present application aims to provide a casing damage well expanding grinding shoe and a processing equipment thereof to solve the problems in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a casing damage well expanding grinding shoe, comprising an outer shell, an opening is formed in the top surface of the outer shell, a fixed strip is fixed in the inner part of the outer shell, an inner tube is movably connected to one side surface of the fixed strip, an inner column is arranged in the inner tube, a friction head is fixed to one end of the inner column, a push column is fixed to the other end of the inner column, two clamping grooves are formed in the outer lateral wall of the inner column, two clamping strips are fixed to the inner lateral wall of the inner tube, the clamping strips are clamped with the corresponding clamping grooves, a first servo motor is fixed to the top surface of the fixed strip, a first gear is fixed to the output end of the first servo motor, a second gear is fixed to the outer lateral wall of the inner tube close to one side of the inner tube, the first gear is engaged with the second gear, and a conversion assembly is arranged on the top of the fixed strip.

[0006] Preferably, the conversion assembly comprises a convex strip, the convex strip is fixed to the top surface of the fixed strip, a first rotating rod is movably connected to the middle part of one side surface of the convex strip, a fourth gear is fixed to one side of the first rotating rod, a third gear is fixed to the outer lateral wall of the output end of the first servo motor, the third gear is engaged with the fourth gear, second rotating rods are movably connected to the top parts of the opposite side surfaces of the convex strip, a sixth gear and a fifth gear are fixed to one side of the outer lateral wall of one side of the second rotating rod, a seventh gear is fixed to one side of the outer lateral wall of the other side of the second rotating rod, and the sixth gear is engaged with the fourth gear.

[0007] Preferably, the conversion assembly further comprises a rotating disc movably connected to the top surface of the convex block, three second arc-shaped racks circumferentially distributed are fixed on the bottom edge of the rotating disc, three first arc-shaped racks circumferentially distributed are fixed on the bottom surface of the rotating disc, the first arc-shaped racks and the second arc-shaped racks are distributed in a staggered manner, the sixth gear and the seventh gear are matched with the second arc-shaped racks, and the fifth gear is matched with the first arc-shaped racks.

[0008] Preferably, a threaded rod is fixed at one end of the second rotating rod on the other side, a threaded block is movably connected to the outer lateral wall of the threaded rod, a positioning rod is fixed in the middle of the other side surface of the convex block, the threaded block is movably connected with the positioning rod, a stop block is fixed at one end of the positioning rod, an L-shaped rod is fixed on the bottom surface of the threaded block, and the L-shaped rod is matched with the push column.

[0009] Preferably, an inner plate is fixed inside the inner tube, two guide columns are fixed at the other end of the inner column, the guide columns pass through the inner plate, springs are arranged on the periphery of the guide columns, one end of the spring is fixed on one side of the inner plate, and the other end of the spring is fixed on the other end of the inner column.

[0010] Preferably, a connecting pipe is fixed on the top surface of the shell, and two first butt joints are formed in the inner lateral wall of the connecting pipe.

[0011] Preferably, a plurality of mounting holes circumferentially distributed are formed in the outer lateral wall of the shell, and cutting teeth are fixed in the mounting holes.

[0012] To solve the above technical problems, the application further provides a processing equipment for expanding the shoe of a casing damage well, comprising an operation table, a guide rail is fixed on the top surface of the operation table, a T-shaped strip is movably clamped in the guide rail, an embedded plate is fixed on the top surface of the T-shaped strip, a plurality of storage tubes uniformly distributed are arranged in the embedded plate, a push disc is arranged on one side in the inner part of the storage tube, a push rod is fixed on one side of the push disc, and a plurality of connecting strips are fixed at one end of the push rod.

[0013] Preferably, an L-shaped plate is fixed on one side of the top surface of the operation table, a placing column is movably connected to the inner lateral wall top surface of the L-shaped plate, a second butt joint is formed in the bottom of the outer lateral wall of the placing column, an eighth gear is fixed on the outer lateral wall of the placing column, a second servo motor is fixed on the inner lateral wall top surface of the L-shaped plate, a ninth gear is fixed on the output end of the second servo motor, the ninth gear is meshed with the eighth gear, and a pulse fiber laser is arranged on the top surface of the operation table.

[0014] Compared with the prior art, the casing damage well expansion shoe and the processing equipment thereof provided by the application have at least the following beneficial effects: (1) Through the first servo motor, the first gear and the second gear, the inner tube can rotate, and then the friction head rotates, which facilitates the friction head to rub the protruding position in the sleeve to heat up. This setting facilitates the subsequent friction head to push the protruding position to deform. Through the third gear, the fourth gear and the sixth gear, the first servo motor slows down after the reduction of the third gear, the fourth gear and the sixth gear, and the rotation speed of the sixth gear is slow, which facilitates the friction head to be pushed after heating the protruding position for a certain period of time, so that the protruding position is pushed to deform by the friction head. Through the cutting teeth, after the protruding position is pushed to reset, the wrinkles at the reset position of the protruding position can be polished by the cutting teeth, so that the inner wall of the sleeve is smoother, thereby avoiding the protruding position being easily punched when the tapered expanding grinding shoe is used to polish the protruding position in the sleeve, forming a hole and reducing the pressure-bearing capacity of the sleeve.

[0015] (2) Through the sixth gear, the second arc-shaped gear rack, the fifth gear, the first arc-shaped gear rack and the seventh gear, the friction head will not be pushed during the friction heating process of the protruding position. After the sixth gear and the second arc-shaped gear rack are separated, the fifth gear and the first arc-shaped gear rack are engaged, the turntable can drive the seventh gear to rotate, and then the threaded rod rotates, the L-shaped rod pushes the push column to push the friction head, and the protruding position after heating is pushed to reset, so that the protruding position after heating can be pushed to reset.

[0016] (3) Through the storage tube, a certain amount of cutting teeth can be stored in the storage tube, avoiding multiple replenishments and affecting the welding efficiency of the cutting teeth. Through the push disc, the push rod and the connecting strip, the cutting teeth in the storage tube can be pushed into the mounting hole, so that the cutting teeth are placed in the mounting hole. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the friction head structure of the present application; Figure 3 It is a schematic diagram of the protruding block structure of the present application; Figure 4 It is a schematic diagram of the turntable structure of the present application; Figure 5 It is a schematic diagram of the clamping strip structure of the present application; Figure 6 It is a schematic diagram of the clamping groove structure of the present application; Figure 7 It is a schematic diagram of the operation table structure of the present application; Figure 8 It is a schematic diagram of the storage tube cross-section structure of the present application.

[0018] In the picture: 100. Outer shell; 101. Opening; 102. Mounting hole; 103. Cutting teeth; 104. Connecting pipe; 105. First mating hole; 200. Fixing strip; 201. Inner tube; 202. Friction head; 203. Inner column; 204. Engaging groove; 205. Engaging strip; 206. Inner plate; 207. Push column; 208. Guide column; 209. Spring; 300, Convex block; 301, First servo motor; 302, First gear; 303, Second gear; 304, Third gear; 400. First rotating rod; 401. Fourth gear; 402. Second rotating rod; 403. Fifth gear; 404. Sixth gear; 405. Seventh gear; 500. Turntable; 501. First arc-shaped rack; 502. Second arc-shaped rack; 600. Positioning rod; 601. Threaded block; 602. L-shaped rod; 603. Stop block; 604. Threaded rod; 700. Operating table; 701. L-shaped plate; 702. Placement column; 703. Eighth gear; 704. Second docking hole; 705. Second servo motor; 706. Ninth gear; 707. Pulsed fiber laser; 800, guide rail; 801, T-shaped bar; 802, interlocking plate; 803, storage tube; 804, push plate; 805, push rod; 806, connecting bar. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be noted that, unless otherwise specified, the implementation methods and features in the implementation methods in this disclosure can be combined, separated, interchanged, and / or rearranged. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0021] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0022] Please see Figures 1-6 This invention provides a well casing enlargement grinding shoe, comprising a shell 100, an opening 101 on the top surface of the shell 100, a fixing strip 200 fixed inside the shell 100, an inner tube 201 movably connected to one side of the fixing strip 200, an inner column 203 disposed inside the inner tube 201, a friction head 202 fixed to one end of the inner column 203, a push column 207 fixed to the other end of the inner column 203, two engaging grooves 204 formed on the outer side wall of the inner column 203, two engaging strips 205 fixed to the inner side wall of the inner tube 201, the engaging strips 205 engaging with the corresponding engaging grooves 204, a first servo motor 301 fixed to the top surface of the fixing strip 200, a first gear 302 fixed to the output end of the first servo motor 301, a second gear 303 fixed to the outer side wall of the inner tube 201 near the inner tube 201, the first gear 302 meshing with the second gear 303, and a conversion component disposed on the top of the fixing strip 200.

[0023] As a further embodiment of the present invention, the conversion component includes a convex strip fixed to the top surface of the fixing strip 200. A first rotating rod 400 is movably connected to the middle of one side of the convex strip. A fourth gear 401 is fixed to one side of the first rotating rod 400. A third gear 304 is fixed to the outer wall of the output end of the first servo motor 301, and the third gear 304 meshes with the fourth gear 401. Second rotating rods 402 are movably connected to the top of the opposite two sides of the convex strip. A sixth gear 404 and a fifth gear 403 are fixed to one side of the outer wall of the second rotating rod 402, and a seventh gear 405 is fixed to one side of the outer wall of the second rotating rod 402 on the other side. The sixth gear 404 meshes with the fourth gear 401. Through the arrangement of the third gear 304, the fourth gear 401, and the sixth gear 404, the speed of the first servo motor 301 can be reduced by the deceleration effect of the third gear 304, the fourth gear 401, and the sixth gear 404, ultimately driving the second rotating rod 402 to rotate slowly.

[0024] As a further embodiment of the present invention, the conversion component further includes a turntable 500, which is movably connected to the top surface of the convex block 300. Three second arc-shaped racks 502 arranged in a circular pattern are fixed at the bottom edge of the turntable 500, and three first arc-shaped racks 501 arranged in a circular pattern are fixed on the bottom surface of the turntable 500. The first arc-shaped racks 501 and the second arc-shaped racks 502 are staggered. The sixth gear 404 and the seventh gear 405 cooperate with the second arc-shaped racks 502, and the fifth gear 403 cooperates with the first arc-shaped racks 501. The second arc-shaped rack 502 allows the sixth gear 404 to rotate, enabling the turntable 500 to rotate through its engagement with the second arc-shaped rack 502, facilitating the subsequent rotation of the fifth gear 403. The first arc-shaped rack 501 allows the sixth gear 404 to mesh with the second arc-shaped rack 502, driving the turntable 500 to rotate. After the sixth gear 404 disengages from the second arc-shaped rack 502, the fifth gear 403 can mesh with the first arc-shaped rack 501, driving the turntable 500 to rotate, ultimately driving the seventh gear 403. When wheel 405 rotates, this configuration ensures that during the process of the first servo motor 301 rotating to drive the friction head 202 to rub and heat the protruding position inside the casing of the damaged well, the seventh gear 405 will not rotate. After the heating is completed, the fifth gear 403 can mesh with the first arc-shaped rack 501, causing the turntable 500 to rotate. At this time, the seventh gear 405 meshes with the second arc-shaped rack 502, and the rotation of the seventh gear 405 drives the threaded rod 604 to rotate, which can separate the friction heating process of the friction head 202 and the process of driving the threaded rod 604 to rotate.

[0025] As a further embodiment of the present invention, a threaded rod 604 is fixed to one end of the second rotating rod 402 on the other side. A threaded block 601 is movably connected to the outer wall of the threaded rod 604. A positioning rod 600 is fixed to the middle of the other side of the convex block 300. The threaded block 601 is movably connected to the positioning rod 600. A stop block 603 is fixed to one end of the positioning rod 600. An L-shaped rod 602 is fixed to the bottom surface of the threaded block 601. The L-shaped rod 602 cooperates with the push column 207. The positioning rod 600 allows the threaded block 601 to be movably limited. The threaded rod 604 and the threaded block 601 allow the L-shaped rod 602 to move and push the push column 207, thereby pushing the friction head 202 and causing the friction head 202 to push and deform the protruding position inside the sleeve.

[0026] As a further embodiment of the present invention, an inner plate 206 is fixed inside the inner tube 201, and two guide posts 208 are fixed at the other end of the inner column 203. The guide posts 208 pass through the inner plate 206, and a spring 209 is provided around the guide posts 208. One end of the spring 209 is fixed to one side of the inner plate 206, and the other end of the spring 209 is fixed to the other end of the inner column 203.

[0027] The guide post 208 is set so that the position of the spring 209 can be limited. The spring 209 is set so that after a protrusion is processed inside the sleeve, the first servo motor 301 is rotated in the opposite direction so that the L-shaped rod 602 moves away from the push post 207. The stretched spring 209 can pull the friction head 202 to reset.

[0028] As a further embodiment of the present invention, a connecting pipe 104 is fixed in the middle of the top surface of the outer shell 100, and two first mating holes 105 are formed on the inner side wall of the connecting pipe 104. The connecting pipe 104 allows the entire grinding shoe to be connected to an external drill rod, facilitating the rotation of the grinding shoe.

[0029] As a further aspect of the present invention, the outer wall of the outer casing 100 is provided with a plurality of circumferentially distributed mounting holes 102, and cutting teeth 103 are fixed in the mounting holes 102. Through the provided cutting teeth 103, after the protrusion inside the sleeve is deformed by air extrusion, the cutting teeth 103 can be rotated by the rotation of the outer casing 100 to grind the protrusion inside the sleeve.

[0030] Principle: When grinding the protruding part of the casing in a damaged well, firstly, the bottom of the outer drill pipe is placed inside the connecting pipe 104. Then, the first mating hole 105 is aligned with the hole on the outer periphery of the bottom of the drill pipe. Next, the pin is passed through the first mating hole 105 and the hole on the outer periphery of the bottom of the drill pipe. Then, the drill pipe is operated so that the outer casing 100 is located inside the damaged well casing. At this time, the cutting teeth 103 contact the inner wall of the casing. Then, the position of the outer casing 100 is adjusted so that the opening 101 corresponds to the protrusion inside the casing. Then, the drill pipe is operated so that the outer casing 100 moves downward. When the outer casing 100 reaches its position, the friction head 202 corresponds to the protrusion. Then, the first servo motor 301 is started. The rotation of the first servo motor 301 drives the first gear 302 to rotate. The rotation of gear 2 drives the second gear 303 to rotate, which in turn drives the inner tube 201 to rotate, which in turn drives the friction head 202 to rotate. Simultaneously, the rotation of the first servo motor 301 drives the third gear 304 to rotate, which in turn drives the fourth gear 401 to rotate, which in turn drives the sixth gear 404 to rotate. The sixth gear 404 meshes with the second arc-shaped rack 502, causing the turntable 500 to rotate. At this time, the friction head 202 and the turntable 500 rotate at different speeds. When the sixth gear 404 disengages from the second arc-shaped rack 502, the fifth gear 403 meshes with the first arc-shaped rack 501. The rotation of the fifth gear 403 then drives the turntable 500 to rotate, causing the seventh... Gear 405 meshes with the second arc-shaped rack 502. At this time, the seventh gear 405 rotates, causing the threaded rod 604 to rotate. The rotation of the threaded rod 604 causes the threaded block 601 to move. The movement of the threaded block 601 drives the L-shaped rod 602 to move, causing the push column 207 to move. The movement of the push column 207 pushes the friction head 202 to move until the friction head 202 contacts the protrusion and pushes the protrusion. When the seventh gear 405 separates from the second arc-shaped rack 502, the fifth gear 403 separates from the first arc-shaped rack 501. Then, the sixth gear 404 meshes with the second arc-shaped rack 502 and drives the turntable 500 to rotate. At this time, the friction head 202 contacts the protrusion and generates heat under the action of friction. At this point, 202 does not move. After the friction head 202 rotates for a period of time, the sixth gear 404 separates from the second arc-shaped rack 502, and the fifth gear 403 meshes with the first arc-shaped rack 501, causing the turntable 500 to rotate. The rotation of the turntable 500 causes the seventh gear 405 to mesh with the second arc-shaped rack 502, causing the threaded rod 604 to rotate, which in turn pushes the friction head 202. This process is repeated to form a process of grinding and heating the protrusion --> pushing the protrusion to deform. When the protrusion is pushed back to its original position, the first servo motor 301 is turned off, and the external drill rod is started. The rotation of the drill rod drives the outer shell 100 to rotate. The rotation of the outer shell 100 causes the cutting teeth 103 to rotate and grind the part of the protrusion after it is reset, making the inner wall of the sleeve smoother.

[0031] The lead of the threaded rod 604 can be selected according to the actual situation. The first arc-shaped rack 501, the second arc-shaped rack 502, the third gear 304, the fourth gear 401, the sixth gear 404, the fifth gear 403, and the seventh gear 405 are selected according to the actual situation, using gears with appropriate teeth.

[0032] Please see Figures 7-8 This invention provides a processing device for enlarging the diameter of a damaged well, including an operating table 700. A guide rail 800 is fixed in the middle of the top surface of the operating table 700. A T-shaped strip 801 is movably engaged inside the guide rail 800. A fitting plate 802 is fixed on the top surface of the T-shaped strip 801. A plurality of evenly distributed storage tubes 803 are arranged inside the fitting plate 802. A push plate 804 is arranged on one side inside the storage tube 803. A push rod 805 is fixed on one side of the push plate 804. A connecting strip 806 is fixed to one end of each of the push rods 805.

[0033] As a further embodiment of the present invention, an L-shaped plate 701 is fixed to one side of the top surface of the operating table 700. A placement column 702 is movably connected to the top surface of the inner sidewall of the L-shaped plate 701. A second docking hole 704 is opened at the bottom of the outer sidewall of the placement column 702. An eighth gear 703 is fixed to the outer sidewall of the placement column 702. A second servo motor 705 is fixed to the top surface of the inner sidewall of the L-shaped plate 701. A ninth gear 706 is fixed to the output end of the second servo motor 705. The ninth gear 706 meshes with the eighth gear 703. A pulsed fiber laser 707 is provided on the top surface of the operating table 700. The placement column 702 can rotate through the second servo motor 705, the eighth gear 703, and the ninth gear 706. The pulsed fiber laser 707 allows the cutting teeth 103 to be welded into the mounting hole 102 after being placed in the mounting hole 102.

[0034] Principle: When welding the cutting teeth 103, firstly, several cutting teeth 103 are respectively transferred into the storage tube 803. Then, the top of the connecting tube 104 is aligned with the placement column 702, and the position of the connecting tube 104 is adjusted so that the first mating hole 105 and the second mating hole 704 are aligned. Then, a pin is inserted into the first mating hole 105 and the second mating hole 704 to fix the connecting tube 104, thereby fixing the outer casing 100. Then, the second servo motor 705 is started. The second servo motor 705 rotates a certain number of times, driving the ninth gear 706 to rotate. The ninth gear 706 rotates... The motor drives the eighth gear 703 to rotate, which in turn drives the outer casing 100 to rotate. The outer casing 100 rotates at a certain angle, at which point the storage tube 803 corresponds to the mounting hole 102. Then, the interlocking plate 802 is pushed so that the storage tube 803 contacts the mounting hole 102. Then, the connecting strip 806 is pushed so that the cutting teeth 103 in the storage tube 803 are pushed into the mounting hole 102. Then, the interlocking plate 802 is pulled in the opposite direction so that the cutting teeth 103 in the mounting hole 102 are exposed. Then, the pulsed fiber laser 707 is activated, and the pulsed fiber laser 707 welds the cutting teeth 103.

[0035] The core principle of the 707 pulsed fiber laser for welding and grinding shoe cutting teeth 103 is to utilize high energy density (>10). 6 A short-pulse laser beam with a power of W / cm² and nanosecond-level pulses (10-200 μs) is precisely applied to the interface between the cutting tooth 103 (such as PDC / cBN) and the substrate. Through photothermal conversion, a molten pool with a temperature >2500℃ is instantaneously formed in the micron-scale region, achieving metallurgical bonding between the superhard material and the alloy steel substrate. The essence of this technology lies in selective heat input control: the peak energy of the pulse vaporizes the interfacial metal micro-regions to form plasma, and the resulting recoil pressure (>10 MPa) drives the molten metal to fill the micropores on the surface of the cutting tooth 103. At the same time, rapid cooling (cooling rate >10) occurs during the pulse interval (1-10 ms). 6 K / s) suppresses carbide precipitation and hot cracking, and improves bonding strength to >1500MPa; while the flexible transmission characteristics of fiber laser ensure that the beam focusing spot (50-200μm) is precisely matched with the tooth seat structure. By waveform modulation (square wave / sharp wave) to adapt to different materials (such as PDC, which requires a front sharp peak to break through the diamond layer, and the matrix welding uses a square wave to maintain the stability of the molten pool), the cutting tooth 103 is finally achieved with zero shedding under complex downhole loads under the condition that the heat-affected zone is <30μm.

[0036] The first servo motor 301, the second servo motor 705, and the pulsed fiber laser 707 can be purchased from the market and are mature technologies in this field, which have been fully disclosed. Therefore, they will not be described again in the specification.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wellbore enlargement and reaming shoe for casing damage, comprising a shell (100), characterized in that, The top surface of the outer shell (100) has an opening (101). A fixing strip (200) is fixed inside the outer shell (100). An inner tube (201) is movably connected to one side of the fixing strip (200). An inner column (203) is provided inside the inner tube (201). A friction head (202) is fixed to one end of the inner column (203), and a push column (207) is fixed to the other end of the inner column (203). Two engaging grooves (204) are opened on the outer side wall of the inner column (203). The inner side wall of the inner tube (201) is fixed. There are two locking strips (205), which engage with corresponding locking grooves (204). A first servo motor (301) is fixed on the top surface of the fixing strip (200). A first gear (302) is fixed at the output end of the first servo motor (301). A second gear (303) is fixed on the outer side wall of the inner tube (201) near the inner tube (201). The first gear (302) meshes with the second gear (303). A conversion component is provided on the top of the fixing strip (200).

2. The casing damage well enlargement grinding shoe according to claim 1, characterized in that: The conversion component includes a convex strip, which is fixed to the top surface of the fixed strip (200). A first rotating rod (400) is movably connected to the middle of one side of the convex strip. A fourth gear (401) is fixed to one side of the first rotating rod (400). A third gear (304) is fixed to the outer wall of the output end of the first servo motor (301). The third gear (304) meshes with the fourth gear (401). A second rotating rod (402) is movably connected to the top of the two opposite sides of the convex strip. A sixth gear (404) and a fifth gear (403) are fixed to one side of the outer wall of the second rotating rod (402). A seventh gear (405) is fixed to one side of the outer wall of the second rotating rod (402). The sixth gear (404) meshes with the fourth gear (401).

3. The casing damage well enlargement grinding shoe according to claim 1, characterized in that: The conversion assembly also includes a turntable (500), which is movably connected to the top surface of the convex block (300). Three second arc-shaped racks (502) are fixed at the bottom edge of the turntable (500) in a circular arrangement. Three first arc-shaped racks (501) are fixed at the bottom surface of the turntable (500) in a circular arrangement. The first arc-shaped racks (501) and the second arc-shaped racks (502) are staggered. The sixth gear (404) and the seventh gear (405) cooperate with the second arc-shaped racks (502), and the fifth gear (403) cooperates with the first arc-shaped racks (501).

4. The casing damage well enlargement grinding shoe according to claim 2, characterized in that: On the other side, a threaded rod (604) is fixed at one end of the second rotating rod (402). A threaded block (601) is movably connected to the outer wall of the threaded rod (604). A positioning rod (600) is fixed in the middle of the other side of the convex block (300). The threaded block (601) is movably connected to the positioning rod (600). A stop block (603) is fixed at one end of the positioning rod (600). An L-shaped rod (602) is fixed on the bottom surface of the threaded block (601). The L-shaped rod (602) cooperates with the push column (207).

5. The casing damage well enlargement grinding shoe according to claim 1, characterized in that: An inner plate (206) is fixed inside the inner tube (201). Two guide posts (208) are fixed at the other end of the inner column (203). The guide posts (208) pass through the inner plate (206). A spring (209) is provided around the guide post (208). One end of the spring (209) is fixed to one side of the inner plate (206), and the other end of the spring (209) is fixed to the other end of the inner column (203).

6. The casing damage well enlargement grinding shoe according to claim 1, characterized in that: A connecting pipe (104) is fixed in the middle of the top surface of the outer shell (100), and two first docking holes (105) are opened on the inner side wall of the connecting pipe (104).

7. A casing damage well enlargement grinding shoe according to claim 1, characterized in that: The outer wall of the outer shell (100) is provided with a plurality of circumferentially distributed mounting holes (102), and cutting teeth (103) are fixed in the mounting holes (102).

8. A processing equipment for enlarging the diameter of a casing-damaged well, characterized in that, The system includes an operating table (700), a guide rail (800) fixed in the middle of the top surface of the operating table (700), a T-shaped strip (801) movably engaged in the guide rail (800), a fitting plate (802) fixed on the top surface of the T-shaped strip (801), a plurality of evenly distributed storage tubes (803) arranged in the fitting plate (802), a push plate (804) arranged on one side inside the storage tube (803), a push rod (805) fixed on one side of the push plate (804), and a connecting strip (806) fixed at one end of the plurality of push rods (805).

9. The processing equipment for enlarging the diameter of a casing-damaged well according to claim 8, characterized in that: An L-shaped plate (701) is fixed to one side of the top surface of the operating table (700). A placement column (702) is movably connected to the top surface of the inner side wall of the L-shaped plate (701). A second docking hole (704) is opened at the bottom of the outer side wall of the placement column (702). An eighth gear (703) is fixed to the outer side wall of the placement column (702). A second servo motor (705) is fixed to the top surface of the inner side wall of the L-shaped plate (701). A ninth gear (706) is fixed to the output end of the second servo motor (705). The ninth gear (706) meshes with the eighth gear (703). A pulsed fiber laser (707) is provided on the top surface of the operating table (700).

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