Downhole casing patch type repairing device and method

Abstract

The invention relates to the technical field of underground casing pipe repairing, and discloses an underground casing pipe patch type repairing device and method.The underground casing pipe patch type repairing device comprises an underground casing pipe, the interior of the underground casing pipe is connected with connecting discs on the upper side through a hoisting mechanism arranged on the upper portion, and a connecting cylinder is connected between the upper connecting disc and the lower connecting disc through a rotating mechanism; repair can be achieved through the repair patch, the defect of extrusion forming repair is overcome, repair and pasting of the repair patch can be achieved at the angle positions in multiple directions, the repair efficiency is high, and repair is firm; the edge of the repairing patch can be glued, the edge of the pasted repairing patch can be sealed, the repairing firmness is improved, and it is guaranteed that other impurities cannot enter the space between the patch and the sleeve, and the repairing firmness is not affected; according to the repairing device, the repairing patch can be rolled and pressed in multiple directions and angles, so that the repairing patch is tightly attached to the surface of the sleeve, and the repairing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of downhole casing repair, and particularly relates to a downhole casing patching repair device and method. BACKGROUND

[0002] The oil casing is a steel pipe used for supporting the well wall of an oil or gas well to ensure the normal operation of the entire oil well during the drilling process and after the well completion. According to different drilling depths and geological conditions, several layers of casings are used for each well. After the casing is lowered into the well, cementing is used, which is different from the oil pipe and drill pipe and cannot be reused, and is a one-time consumable material.

[0003] At present, the downhole casing may be damaged or cracked on the surface after being used for a period of time. Once the casing is damaged, the oil and gas transportation will be affected. At present, there are few devices for repairing the downhole casing. The repair method is basically to extrude the material into a shape and attach it to the surface of the casing. However, after being used for a period of time, the extruded material will be separated from the casing, resulting in a failed repair. SUMMARY

[0004] In view of the above problems, the present application provides a downhole casing patching repair device and method to overcome the defects of the prior art.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a downhole casing patching repair device, comprising a downhole casing, a connecting disc on the upper side connected to the downhole casing through a hoisting mechanism arranged on the upper part, a connecting barrel connected between the connecting discs on the upper and lower sides through a rotating mechanism, a movement support mechanism arranged on the connecting disc, the movement support mechanism being used for supporting the movement of the connecting disc, and moving on the inner side of the downhole casing, a plurality of repair mechanisms arranged on the outer surface of the connecting barrel, the repair mechanisms being used for repairing the downhole casing, a patching patch, an edge glue coating mechanism arranged on the connecting barrel on the upper side of the repair mechanism, the edge glue coating mechanism being used for coating glue on the edge position of the patched patch, a rolling mechanism arranged on the surface of the connecting barrel on the opposite side of the edge glue coating mechanism, the rolling mechanism being used for pressing the patched patch, a pressing mechanism arranged on the connecting barrel on the upper side of the rolling mechanism, the pressing mechanism being used for finally pressing the patch, and a monitoring mechanism connected to the connecting disc on the lower side, the monitoring mechanism being used for monitoring the position needing repair on the inner side of the downhole casing.

[0006] Preferably, the repair mechanism comprises a repair electric push rod mounted on the connecting barrel, one end of the repair electric push rod is connected with a micro adjusting motor fixedly installed in the connecting barrel, the other end of the repair electric push rod is fixedly connected with a repair connecting plate, a plurality of first groove blocks are fixedly installed on the repair connecting plate in symmetrical array, a hinge shaft is rotatably connected to the first groove block, a rotating rod is fixedly installed on the outer surface of the hinge shaft, a reset torsion spring is connected between the rotating rod and the side wall of the first groove block, the reset torsion spring is sleeved on the surface of the hinge shaft, a sliding rod is slidably connected in the rotating rod, a jacking spring is connected between one end of the sliding rod and the rotating rod, a connecting shaft is fixedly connected to the other end of the sliding rod, the connecting shaft is rotatably connected to a second groove block, the second groove blocks are fixedly installed on the inner side surface of a deformation plate in uniform, a hollow tube is fixedly connected to the middle position of the repair connecting plate, a jacking sliding rod is slidably connected in the hollow tube, a pushing spring is connected between one end of the jacking sliding rod and the hollow tube, the other end of the jacking sliding rod is fixedly connected with the deformation plate, the deformation plate has a certain elasticity, adsorption discs are fixedly installed on the outer surface of the deformation plate in symmetry, repair patches are adsorptively connected to the adsorption discs, the adsorption discs and a suction pump are connected through a suction pipe, the suction pump is fixedly installed on the connecting barrel, spherical jacking blocks are fixedly installed on the outer surface of the deformation plate between the adsorption discs in uniform, the spherical jacking blocks are in contact with the repair patches.

[0007] Preferably, the edge gluing mechanism comprises a gluing worm cavity provided in the connecting barrel, a gluing worm shaft rotatably connected between the end walls of the gluing worm cavity, the gluing worm shaft is in power connection with a gluing angle adjusting motor fixedly installed in the connecting barrel, a gluing worm fixedly installed on the outer surface of the gluing worm shaft, the gluing worm is in engagement with a gluing worm wheel, the gluing worm wheel is fixedly installed on the outer surface of a gluing worm wheel shaft, the gluing worm wheel shaft penetrates and is rotatably installed between the end walls of the gluing worm cavity, a gluing vertical groove frame fixedly installed at the end of the gluing worm wheel shaft, a vertical electric lead screw rotatably connected on the gluing vertical groove frame, a vertical nut block in threaded connection with the outer surface of the vertical electric lead screw and sliding on the gluing vertical groove frame, a gluing horizontal groove frame fixedly installed on the vertical nut block, a horizontal electric lead screw rotatably connected on the gluing horizontal groove frame, a horizontal nut block in threaded connection with the outer surface of the horizontal electric lead screw and slidingly connected on the gluing horizontal groove frame, a gluing electric push rod fixedly connected on the end wall of the horizontal nut block, a gluing nozzle fixedly connected at the end of the gluing electric push rod, one side end of a glue conveying pipe connected on the gluing nozzle, the other side end of the glue conveying pipe in communication with a sealant storage cavity provided in the connecting barrel, an extrusion electric push rod fixedly connected on the top wall of the sealant storage cavity, an extrusion sliding plate fixedly connected on the lower side end of the extrusion electric push rod, the extrusion sliding plate in sliding connection and sealing with the sealant storage cavity, the end wall of the sealant storage cavity is smooth, and the bottom wall of the extrusion sliding plate is smooth.

[0008] Preferably, the rolling mechanism comprises a rolling groove frame symmetrically provided on the connecting barrel and opposite to the gluing vertical groove frame, a rolling electric lead screw rotatably connected on the rolling groove frame, a rolling nut block in threaded connection with the rolling electric lead screw and slidingly connected on the rolling groove frame, a rolling electric telescopic rotating shaft fixedly installed on the end wall of the rolling nut block, and a rolling groove block fixedly connected at the end of the rolling electric telescopic rotating shaft, and a rolling wheel hinged on the rolling groove block.

[0009] Preferably, the pressing mechanism comprises a pressing gear cavity provided in the connecting barrel, a pressing drive shaft rotatably connected on the top of the pressing gear cavity, the pressing drive shaft is in power connection with a pressing motor fixedly installed in the connecting barrel, a pressing turntable fixedly connected on the lower side end of the pressing drive shaft, a pressing ring-shaped rack fixedly connected on the lower part of the pressing turntable, the pressing ring-shaped rack is in engagement with a plurality of pressing gears, the pressing gears are fixedly installed at the end of a pressing lead screw, the pressing lead screw penetrates and is rotatably installed on the end wall of the pressing gear cavity, the pressing lead screw is in threaded connection with a pressing threaded cylinder, the pressing threaded cylinder is slidingly connected in a fixed sliding cylinder, the fixed sliding cylinder is fixedly installed on the connecting barrel, a pressing cylinder frame fixedly installed at the end of the pressing threaded cylinder, and a pressing cylinder hinged on the pressing cylinder frame.

[0010] Preferably, the motion support mechanism comprises a bevel gear cavity provided in the connecting disc, a support drive shaft is rotatably connected to the end wall of the bevel gear cavity, the support drive shaft is in power connection with a motion support motor fixedly installed in the connecting disc, a driving bevel gear is fixedly connected to the end of the support drive shaft, the driving bevel gear is in engagement with a driven bevel gear, the driven bevel gear is fixedly installed at the end of a support lead screw, the support lead screw is rotatably installed through the end wall of the bevel gear cavity, the support lead screw is in screw connection with a support threaded cylinder, the support threaded cylinder is rotatably connected through the connecting disc, a support frame is fixedly connected to the end of the support threaded cylinder, a support wheel mounting shaft is rotatably connected to the support frame, a support wheel is fixedly installed on the outer surface of the support wheel mounting shaft, the support wheel mounting shaft extends into a brake cavity provided in the support frame, brake electric lead screws are symmetrically and rotatably connected between the end walls of the brake cavity, the brake electric lead screws are in screw connection with a brake nut plate, brake teeth are fixedly installed on the end walls of the brake nut plate, the brake teeth are in engagement with a brake gear, the brake gear is fixedly installed on the outer surface of the support wheel mounting shaft in the brake cavity.

[0011] Preferably, the hoisting mechanism comprises a hoisting frame arranged on the upper part of the downhole casing, a plurality of roller frame connecting shafts are rotatably connected to the bottom of the hoisting frame, roller frames are fixedly connected to the lower ends of the roller frame connecting shafts, rollers are hingedly connected to the roller frames, hoisting gear cavities are symmetrically arranged in the hoisting frame, a hoisting driving gear shaft is rotatably connected between the end walls of the hoisting gear cavities on one side, the hoisting driving gear shaft is power-connected with a hoisting motor fixedly installed on the hoisting frame, a hoisting driving gear is fixedly installed on the outer surface of the hoisting driving gear shaft, the hoisting driving gear is engaged with a hoisting driven gear, the hoisting driven gear is fixedly installed on the outer surface of a hoisting rotating shaft, the hoisting rotating shaft penetrates and is rotatably installed between the hoisting gear cavities, an annular hollow frame is fixedly installed in the hoisting gear cavity on the other side, a brake driving gear shaft is rotatably connected in the annular hollow frame, the brake driving gear shaft is power-connected with a brake motor fixedly installed in the annular hollow frame, a brake driving gear is fixedly connected to the end of the brake driving gear shaft, the brake driving gear is engaged with a brake annular rack, the brake annular rack is rotatably installed on the annular hollow frame, the brake annular rack is engaged with a plurality of brake driven gears, the brake driven gears are fixedly installed on the outer surface of brake lead screws, the brake lead screws are rotatably installed on the annular hollow frame, the outer surface of the brake lead screws is threadedly connected with brake threaded cylinders, the brake threaded cylinders penetrate and are slidingly connected on the annular hollow frame, brake plug blocks are fixedly connected to the ends of the brake threaded cylinders, the brake plug blocks are engaged with brake plug plates, the brake plug plates are fixedly installed on the outer surface of the hoisting rotating shaft, a winch is fixedly installed on the outer surface of the hoisting rotating shaft, a hoisting rope is windingly connected on the winch, and the hoisting rope is connected with the upper part of the connecting disc on the upper side.

[0012] Preferably, the rotating mechanism comprises a rotating cavity arranged in the connecting disc, a rotating worm shaft is rotatably connected between the end walls of the rotating cavity, the rotating worm shaft is power-connected with a rotating motor fixedly installed in the connecting disc, a rotating worm is fixedly installed on the outer surface of the rotating worm shaft, the rotating worm is engaged with a rotating worm wheel, the rotating worm wheel is fixedly installed on the outer surface of a rotating worm shaft, the rotating worm shaft penetrates and is rotatably installed on the end walls of the rotating cavity, and the connecting cylinder body is fixedly connected between the rotating worm shafts.

[0013] Preferably, the monitoring mechanism comprises a threaded groove arranged on the lower surface of the connecting disc on the lower side, a transparent cover is threadedly connected in the threaded groove, a plurality of light source adjusting seats are uniformly and circumferentially installed on the bottom wall of the connecting disc, light sources are installed on the light source adjusting seats, a monitoring probe is installed on the bottom wall of the connecting disc, wires are connected between the connecting disc and a control console, a control processor is arranged in the control console, and the control processor is signal-connected with electrical components in the device.

[0014] The application provides a downhole casing patch type repairing method based on the downhole casing patch type repairing device. Step one: the hoisting mechanism moves, thereby driving the hoisting rope to move, so that the connecting disc and the connecting barrel are hoisted into the downhole casing, and the connecting disc and the connecting barrel move in the downhole casing, thereby facilitating the repairing of the downhole casing. Step two: the supporting mechanism moves, thereby supporting the movement of the connecting disc and the connecting barrel in the downhole casing and increasing the stability of the movement. Step three: the monitoring mechanism moves during the movement, thereby monitoring the position to be repaired. Step four: the rotating mechanism moves, so that the connecting barrel rotates, thereby facilitating the repairing. Step five: the repairing mechanism moves, thereby repairing the downhole casing, so that the repairing patch is attached to the position to be repaired on the inner side of the downhole casing and can adapt to repairing in different directions. Step six: after the attachment, the rolling mechanism moves, thereby rolling the attached repairing patch. Step seven: the edge gluing mechanism moves, thereby gluing the edge of the repaired repairing patch, so that the edge of the repairing patch is tightly sealed. Step eight: the pressing mechanism moves, thereby tightly pressing the repaired repairing patch.

[0015] Compared with the prior art, the application has the following beneficial effects: 1. The downhole casing patch type repairing device can realize repairing through the repairing patch, improves the shortcomings of extrusion forming repairing, can realize repairing in multiple direction angle positions, and has high repairing efficiency and high repairing reliability.

[0016] 2. The downhole casing patch type repairing device can glue the edge of the repairing patch, seal the edge of the attached repairing patch, increase the reliability of the repairing, and ensure that other impurities cannot enter between the patch and the casing, thereby affecting the firmness of the repairing.

[0017] 3. The downhole casing patch type repairing device can roll the repairing patch and tightly press the repairing patch in multiple direction angles, so that the repairing patch tightly adheres to the surface of the casing, thereby improving the repairing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are meant to explain the present application and are not intended to limit the application.

[0019] In the drawings: Figure 1 It is a first direction structural schematic view of the combination of the downhole casing patch repair device and the downhole casing in the application. Figure 2 It is a second direction structural schematic view of the combination of the downhole casing patch repair device and the downhole casing in the application. Figure 3 It is a first direction structural schematic view of the downhole casing patch repair device in the application. Figure 4 It is a second direction structural schematic view of the downhole casing patch repair device in the application. Figure 5 It is a third direction structural schematic view of the downhole casing patch repair device in the application. Figure 6 It is a partial structural schematic view of the downhole casing patch repair device in the application. Figure 7 It is a first cross-sectional structural schematic view of the downhole casing patch repair device in the application. Figure 8 It is a second cross-sectional structural schematic view of the downhole casing patch repair device in the application. Figure 9 It is a third cross-sectional structural schematic view of the downhole casing patch repair device in the application. Figure 10 It is a fourth cross-sectional structural schematic view of the downhole casing patch repair device in the application. Figure 11 It is an enlarged structural schematic view of A in the application. Figure 7 It is an enlarged structural schematic view of B in the application. Figure 12 Figure 7 It is an enlarged structural schematic view of C in the application. Figure 13 It is an enlarged structural schematic view of D in the application. Figure 8 It is an enlarged structural schematic view of E in the application. Figure 14 Figure 9 It is an enlarged structural schematic view of F in the application.

[0020] ​​In the figure: 1 - downhole casing, 2 - roller, 3 - roller frame, 4 - hoisting frame, 5 - winch, 6 - hoisting rope, 7 - guide wire, 8 - control console, 9 - rotating worm, 10 - roller frame connecting shaft, 11 - connecting disc, 12 - supporting threaded cylinder, 13 - support frame, 14 - compression roller, 15 - compression roller frame, 16 - connecting cylinder body, 17 - supporting wheel, 18 - fixed sliding cylinder, 19 - compression threaded cylinder, 20 - gluing vertical groove frame, 21 - gluing transverse groove frame, 22 - transverse nut block, 23 - gluing electric push rod, 24 - gluing nozzle, 25 - glue conveying pipe, 26 - repair patch, 27 - spherical jacking block, 28 - adsorption disc, 29 - hinged shaft, 30 - transparent cover, 31 - air suction pipe, 32 - air suction pump, 33 - rolling groove frame, 34 - rolling nut block, 35 - rolling electric telescopic rotating shaft, 36 - rolling groove block, 37 - rolling wheel, 38 - vertical electric lead screw, 39 - vertical nut block, 40 - jacking spring, 41 - transverse electric lead screw, 42 - bevel gear cavity, 43 - driven bevel gear, 44 - supporting lead screw, 45 - driving bevel gear, 46 - supporting drive shaft, 47 - compression lead screw, 48 - compression drive shaft, 49 - compression turntable, 50 - compression ring gear, 51 - compression gear, 52 - compression gear cavity, 53 - extrusion electric push rod, 54 - extrusion sliding plate, 55 - sealant storage cavity, 56 - monitoring probe, 57 - light source, 58 - rotating cavity, 59 - rotating worm shaft, 60 - rotating worm wheel, 61 - rotating worm wheel shaft, 62 - gluing worm cavity, 63 - gluing worm wheel, 64 - gluing worm wheel shaft, 65 - gluing worm, 66 - gluing worm shaft, 67 - rolling electric lead screw, 68 - hoisting gear cavity, 69 - hoisting driven gear, 70 - hoisting rotating shaft, 71 - hoisting driving gear, 72 - hoisting driving gear shaft, 73 - annular hollow frame, 74 - brake driving gear shaft, 75 - brake driving gear, 76 - brake insert disc, 77 - brake driven gear, 78 - brake lead screw, 79 - brake ring gear, 80 - brake threaded cylinder, 81 - brake insert block, 82 - repair electric push rod, 83 - repair connecting plate, 84 - first groove block, 85 - reset torsion spring, 86 - rotating rod, 87 - connecting shaft, 88 - second groove block, 89 - sliding rod, 90 - deformation plate, 91 - jacking sliding rod, 92 - hollow pipe, 93 - jacking spring, 94 - brake cavity, 95 - brake nut plate, 96 - brake tooth, 97 - brake electric lead screw, 98 - brake gear, 99 - supporting wheel mounting shaft, 100 - light source adjusting seat. DETAILED DESCRIPTION

[0021] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the scope of the present application.

[0022] As shown in Figures 1-14 The present application provides a downhole casing patch repair device, which comprises a downhole casing 1, an upper connecting disc 11 connected to the downhole casing 1 through a lifting mechanism arranged on the upper part, a connecting cylinder 16 connected between the upper and lower connecting discs 11 through a rotating mechanism, a movement support mechanism arranged on the connecting disc 11 and used for supporting the movement of the connecting disc 11, a movement inside the downhole casing 1, a plurality of repair mechanisms arranged on the outer surface of the connecting cylinder 16, the repair mechanisms being used for repairing the downhole casing 1, a patch, an edge glue applying mechanism arranged on the connecting cylinder 16 above the repair mechanisms, the edge glue applying mechanism being used for applying glue to the edge position of the repaired patch, a rolling mechanism arranged on the surface of the connecting cylinder 16 opposite to the edge glue applying mechanism, the rolling mechanism being used for compacting the repaired patch, a compacting mechanism arranged on the connecting cylinder 16 above the rolling mechanism, the compacting mechanism being used for finally compacting the patch, and a monitoring mechanism connected to the lower connecting disc 11, the monitoring mechanism being used for monitoring the position of the downhole casing 1 that needs to be repaired.

[0023] Beneficially, the repair mechanism comprises a repair electric push rod 82 mounted on the connecting barrel 16, one end of the repair electric push rod 82 is connected with a miniature adjusting motor fixedly installed in the connecting barrel 16, the other end of the repair electric push rod 82 is fixedly connected with a repair connecting plate 83, a plurality of first groove blocks 84 are fixedly installed on the repair connecting plate 83 in a symmetrical array, a hinged shaft 29 is rotatably connected to the first groove block 84, a rotating rod 86 is fixedly installed on the outer surface of the hinged shaft 29, a reset torsion spring 85 is connected between the rotating rod 86 and the side wall of the first groove block 84, the reset torsion spring 85 is sleeved on the surface of the hinged shaft 29, a sliding rod 89 is slidably connected in the rotating rod 86, a clamping spring 40 is connected between one end of the sliding rod 89 and the rotating rod 86, a connecting shaft 87 is fixedly connected to the other end of the sliding rod 89, the connecting shaft 87 is rotatably connected to a second groove block 88, the second groove block 88 is fixedly installed on the inner side surface of a deformation plate 90, a hollow tube 92 is fixedly connected to the middle position of the repair connecting plate 83, a clamping sliding rod 91 is slidably connected in the hollow tube 92, a clamping spring 93 is connected between one end of the clamping sliding rod 91 and the hollow tube 92, the other end of the clamping sliding rod 91 is fixedly connected with the deformation plate 90, the deformation plate 90 has a certain elasticity, a plurality of adsorption discs 28 are fixedly installed on the outer surface of the deformation plate 90 in a symmetrical manner, a repair patch 26 is adsorptively connected to the adsorption disc 28, the adsorption disc 28 and a suction pump 32 are connected through a suction pipe 31, the suction pump 32 is fixedly installed on the connecting barrel 16, a plurality of spherical clamping blocks 27 are fixedly installed on the outer surface of the deformation plate 90 between the adsorption discs 28, the spherical clamping blocks 27 are in contact with the repair patch 26; When working, the suction pump 32 is started to suck, so that the gas in the adsorption disc 28 is sucked out, so that the gas in the adsorption disc 28 is discharged through the suction pump 32 through the suction pipe 31, so as to realize the adsorption of the repair patch 26, the back of the repair patch 26 is provided with an adhesive, which is convenient for pasting on the downhole casing 1, the repair electric push rod 82 is powered, so as to drive the repair connecting plate 83 to move, so as to drive the hollow pipe 92 to move, so as to drive the top pressing slide rod 91 to move, so as to drive the deformation plate 90 to move, so as to drive the repair patch 26 to move, and paste on the repair position of the downhole casing 1, the spherical top pressing block 27 is pressed to the repair patch 26, and the adsorption of the repair patch 26 is released after being pressed, and when repairing some angle extending position, the micro adjusting motor is started, so as to drive the repair electric push rod 82 to rotate, so as to drive the repair connecting plate 83 to rotate to a certain angle, so as to drive the repair patch 26 to rotate to a certain angle, the deformation plate 90 is deformed to adapt to the inner surface of the downhole casing 1, so that the repair patch 26 is deformed to adapt to the inner surface of the downhole casing 1, so that the corresponding slide rod 89 slides in the rotating rod 86, so that the top pressing spring 40 is pressed, and the rotating rod 86 rotates around the hinge shaft 29, so as to ensure the reliability of the repair, the push spring 93 always pushes the top pressing slide rod 91, and the top pressing spring 40 and the push spring 93 ensure that the repair can always be tightly repaired after deformation, so as to improve the repair efficiency, when the deformation plate 90 deforms adaptively, the spherical top pressing block 27 always supports the repair patch 26, so as to prevent the position of the repair from appearing hollow when pasting and repairing, so as to ensure the repair efficiency.

[0024] Beneficially, the edge gluing mechanism comprises a gluing worm cavity 62 provided in the connecting barrel 16, a gluing worm shaft 66 rotatably connected between the end walls of the gluing worm cavity 62, the gluing worm shaft 66 is in power connection with a gluing angle adjusting motor fixedly installed in the connecting barrel 16, a gluing worm 65 is fixedly installed on the outer surface of the gluing worm shaft 66, the gluing worm 65 is in engagement with a gluing worm wheel 63, the gluing worm wheel 63 is fixedly installed on the outer surface of a gluing worm wheel shaft 64, the gluing worm wheel shaft 64 is rotatably installed between the end walls of the gluing worm cavity 62, a gluing vertical groove frame 20 is fixedly installed at the end of the gluing worm wheel shaft 64, a vertical electric lead screw 38 is rotatably connected to the gluing vertical groove frame 20, a vertical nut block 39 is threadedly connected to the outer surface of the vertical electric lead screw 38 and slides on the gluing vertical groove frame 20, a gluing horizontal groove frame 21 is fixedly installed on the vertical nut block 39, a horizontal electric lead screw 41 is rotatably connected to the gluing horizontal groove frame 21, a horizontal nut block 22 is threadedly connected to the outer surface of the horizontal electric lead screw 41 and is slidingly connected to the gluing horizontal groove frame 21, a gluing electric push rod 23 is fixedly connected to the end wall of the horizontal nut block 22, a gluing nozzle 24 is fixedly connected to the end of the gluing electric push rod 23, one side end of a glue conveying pipe 25 is connected to the gluing nozzle 24, the other side end of the glue conveying pipe 25 is in communication with a sealant storage cavity 55 provided in the connecting barrel 16, an extrusion electric push rod 53 is fixedly connected to the top wall of the sealant storage cavity 55, an extrusion sliding plate 54 is fixedly connected to the lower side end of the extrusion electric push rod 53, the extrusion sliding plate 54 is slidingly and sealingly connected between the sealant storage cavity 55, the end wall of the sealant storage cavity 55 is smooth, the bottom wall of the extrusion sliding plate 54 is smooth, preventing adhesion, the connecting barrel 16 outside the sealant storage cavity 55 is provided with corresponding heating wires, so that the sealant in the sealant storage cavity 55 is in a molten state, preventing condensation, the gluing nozzle 24 is provided with heating wires, preventing the gluing nozzle 24 from being blocked; In operation, during the process of applying glue to the edges of the repair patch 26, the glue application angle adjusting motor is started to drive the glue application worm shaft 66 to rotate, thereby driving the glue application worm 65 to rotate, which is engaged with the glue application worm gear 63, thereby driving the glue application vertical groove frame 20 to rotate, reciprocating the vertical electric screw rod 38, thereby driving the vertical nut block 39 to reciprocate, thereby driving the glue application horizontal groove frame 21 to reciprocate, thereby driving the horizontal nut block 22 to reciprocate, thereby driving the glue application electric push rod 23 to reciprocate, thereby driving the glue application nozzle 24 to reciprocate, reciprocating the horizontal electric screw rod 41, thereby driving the horizontal nut block 22 to reciprocate, thereby driving the glue application electric push rod 23 to reciprocate, thereby driving the glue application nozzle 24 to reciprocate, energizing the glue application electric push rod 23 to extend or contract, energizing the extrusion electric push rod 53, thereby driving the extrusion sliding plate 54 to move downward, thereby extruding the sealant in the sealant storage cavity 55 through the glue delivery pipe 25 into the glue application nozzle 24, which applies the glue to the edge of the repair patch 26, cooperating with the rotation of the connecting cylinder 16 and the movement of the corresponding components, thereby achieving the application of glue to the edges of the repair patch 26 in different positions, directions, and angles, increasing the reliability of the repair patch 26, and making the repair patch 26 more reliable.

[0025] Beneficially, the rolling mechanism includes a rolling groove frame 33 symmetrically arranged on the connecting cylinder 16 with the glue application vertical groove frame 20, a rolling electric screw rod 67 rotatably connected to the rolling groove frame 33, a rolling nut block 34 threadedly connected to the rolling electric screw rod 67 and slidingly connected to the rolling groove frame 33, a rolling electric telescopic rotating shaft 35 fixedly installed on the end wall of the rolling nut block 34, and a rolling groove block 36 fixedly connected to the end of the rolling electric telescopic rotating shaft 35, and a rolling wheel 37 hingedly connected to the rolling groove block 36. In operation, the rolling electric screw rod 67 is powered to rotate reciprocatingly, thereby driving the rolling nut block 34 to move reciprocatingly, driving the rolling electric telescopic rotating shaft 35 to move reciprocatingly, thereby driving the rolling groove block 36 to move reciprocatingly, driving the rolling wheel 37 to move reciprocatingly. The rolling electric telescopic rotating shaft 35 is powered to extend or contract, thereby enabling the rolling wheel 37 to contact the repair patch 26 and roll on the surface of the repair patch 26, compacting the repair patch 26. In the process of adapting to different angles, the rolling electric telescopic rotating shaft 35 is rotated, thereby driving the rolling groove block 36 to rotate, driving the rolling wheel 37 to rotate to a corresponding angle, and cooperating with the rotation of the connecting cylinder 16, the extension and contraction of the rolling electric telescopic rotating shaft 35, and the reciprocating movement of the rolling electric screw rod 67 to roll on the entire surface of the repair patch 26 and achieve comprehensive rolling of the repair patch 26 in different directions and angles, thereby improving the rolling efficiency.

[0026] Beneficially, the compacting mechanism comprises a compacting gear cavity 52 provided in the connecting cylinder 16, a compacting drive shaft 48 rotatably connected to the top of the compacting gear cavity 52, the compacting drive shaft 48 being in power connection with a compacting motor fixedly installed in the connecting cylinder 16, a compacting turntable 49 fixedly connected to the lower end of the compacting drive shaft 48, a compacting annular rack 50 fixedly connected to the lower part of the compacting turntable 49, the compacting annular rack 50 being in meshing connection with a plurality of compacting gears 51, the compacting gears 51 being fixedly installed at the end of a compacting screw rod 47 rotatably installed on the end wall of the compacting gear cavity 52, the compacting screw rod 47 being in threaded connection with a compacting threaded cylinder 19, the compacting threaded cylinder 19 being slidingly connected in a fixed sliding cylinder 18 fixedly installed on the connecting cylinder 16, the compacting threaded cylinder 19 having a compacting roller frame 15 fixedly installed at the end thereof, the compacting roller frame 15 being hingedly connected with a compacting roller 14; In operation, the pressing motor is started to drive the pressing driving shaft 48 to rotate, thus driving the pressing disc 49 to rotate, and driving the pressing annular rack 50 to rotate, which is engaged with the pressing gear 51 to drive the pressing screw rod 47 to rotate, which is in threaded connection with the pressing threaded cylinder 19, thus driving the pressing cylinder frame 15 to move, and driving the pressing cylinder 14 to move to contact and press the repair patch 26 on the inner side of the downhole casing 1, and cooperating with the rotation of the connecting cylinder body 16 to realize the rotation of the pressing cylinder 14 along the inner side of the downhole casing 1, thus realizing the pressing of the entire surface of the repair patch 26, and realizing the pressing of the repair patch 26 in different positions and directions.

[0027] Beneficially, the movement support mechanism comprises a bevel gear cavity 42 provided in the connecting disc 11, the end wall of the bevel gear cavity 42 is rotatably connected with a support driving shaft 46, the support driving shaft 46 is in power connection with a movement support motor fixedly installed in the connecting disc 11, the end of the support driving shaft 46 is fixedly connected with a driving bevel gear 45, the driving bevel gear 45 is engaged with a driven bevel gear 43, the driven bevel gear 43 is fixedly installed at the end of a support screw rod 44, the support screw rod 44 is rotatably installed through the end wall of the bevel gear cavity 42, the support screw rod 44 is in threaded connection with a support threaded cylinder 12, the support threaded cylinder 12 is rotatably connected to the connecting disc 11, the end of the support threaded cylinder 12 is fixedly connected with a support frame 13, the support frame 13 is rotatably connected with a support wheel mounting shaft 99, the outer surface of the support wheel mounting shaft 99 is fixedly installed with a support wheel 17, the support wheel mounting shaft 99 extends into a brake cavity 94 provided in the support frame 13, brake electric screw rods 97 are symmetrically and rotatably connected between the end walls of the brake cavity 94, the brake electric screw rods 97 are in threaded connection with brake nut plates 95, brake teeth 96 are fixedly installed on the end walls of the brake nut plates 95, the brake teeth 96 are engaged with brake gears 98, the brake gears 98 are fixedly installed on the outer surface of the support wheel mounting shaft 99 in the brake cavity 94; When working, the movement support motor is started, thus driving the support driving shaft 46 to rotate, thus driving the driving bevel gear 45 to rotate, the driving bevel gear 45 meshes with the driven bevel gear 43, thus driving the support lead screw 44 to rotate, the support lead screw 44 is in threaded connection with the support threaded cylinder 12, thus driving the support threaded cylinder 12 to move, thus driving the support frame 13 to move, thus driving the support wheel 17 to move and contact the inner side of the downhole casing 1, the support wheel 17 rolls on the inner side surface of the downhole casing 1, when it is needed to stop in the downhole casing 1, the support wheel 17 is tightly pressed against the inner side of the downhole casing 1, thus driving the brake electric lead screw 97 to rotate, thus driving the brake nut plate 95 to move, thus driving the brake tooth 96 to move and mesh with the brake gear wheel 98 to clamp, thus achieving the brake of the support wheel mounting shaft 99, thus making the support wheel 17 unable to roll, and cooperating with the brake of the lifting mechanism, thus achieving better brake and stop of the connecting disc 11.

[0028] Beneficially, the hoisting mechanism comprises a hoisting frame 4 arranged on the upper portion of the downhole casing 1, a plurality of roller frame connecting shafts 10 are rotatably connected to the bottom of the hoisting frame 4, roller frames 3 are fixedly connected to the lower ends of the roller frame connecting shafts 10, rollers 2 are hingedly connected to the roller frames 3, hoisting gear cavities 68 are symmetrically arranged in the hoisting frame 4, a hoisting driving gear shaft 72 is rotatably connected between the end walls of the hoisting gear cavities 68 on one side, the hoisting driving gear shaft 72 is power-connected with a hoisting motor fixedly installed on the hoisting frame 4, a hoisting driving gear 71 is fixedly installed on the outer surface of the hoisting driving gear shaft 72, the hoisting driving gear 71 is engaged with a hoisting driven gear 69, the hoisting driven gear 69 is fixedly installed on the outer surface of a hoisting rotating shaft 70, the hoisting rotating shaft 70 penetrates and is rotatably installed between the hoisting gear cavities 68, an annular hollow frame 73 is fixedly installed in the hoisting gear cavity 68 on the other side, a brake driving gear shaft 74 is rotatably connected in the annular hollow frame 73, the brake driving gear shaft 74 is power-connected with a brake motor fixedly installed in the annular hollow frame 73, a brake driving gear 75 is fixedly connected to the end of the brake driving gear shaft 74, the brake driving gear 75 is engaged with a brake annular rack 79, the brake annular rack 79 is rotatably installed on the annular hollow frame 73, the brake annular rack 79 is engaged with a plurality of brake driven gears 77, the brake driven gears 77 are fixedly installed on the outer surface of a brake lead screw 78, the brake lead screw 78 is rotatably installed on the annular hollow frame 73, a brake threaded cylinder 80 is threadedly connected to the outer surface of the brake lead screw 78, the brake threaded cylinder 80 penetrates and is slidingly connected to the annular hollow frame 73, a brake plug block 81 is fixedly connected to the end of the brake threaded cylinder 80, the brake plug block 81 is engaged with a brake plug disc 76, the brake plug disc 76 is fixedly installed on the outer surface of the hoisting rotating shaft 70, a winch 5 is fixedly installed on the outer surface of the hoisting rotating shaft 70, a hoisting rope 6 is windingly connected to the winch 5, the end of the hoisting rope 6 is connected to the upper portion of the upper connecting disc 11, and a brake plate for braking the rollers 2 is arranged on the roller frame 3; When working, the lifting frame 4 is pushed to move, so that the roller frame connecting shaft 10 rotates, thus driving the roller frame 3 to move, thus driving the roller 2 to roll on the ground, so that the lifting frame 4 moves to the upper side of the downhole casing 1, the lifting motor is started, thus driving the lifting driving gear shaft 72 to rotate, thus driving the lifting driving gear 71 to rotate, the lifting driving gear 71 meshes with the lifting driven gear 69, thus driving the lifting rotating shaft 70 to rotate, thus driving the winch 5 to rotate, thus driving the lifting rope 6 to move, thus driving the connecting disc 11 and the connecting cylinder 16 to move in the downhole casing 1, after moving to the position to be repaired, the brake motor is started, thus driving the brake driving gear shaft 74 to rotate, thus driving the brake driving gear 75 to rotate, the brake driving gear 75 meshes with the brake annular rack 79, thus driving the brake annular rack 79 to rotate, the brake annular rack 79 meshes with the brake driven gear 77, thus driving the brake lead screw 78 to rotate, the brake lead screw 78 is in threaded connection with the brake threaded cylinder 80, thus driving the brake plug 81 to move and mesh with the brake disc 76, thus achieving the brake of the lifting rotating shaft 70, thus achieving the brake of the position of the connecting disc 11 and the connecting cylinder 16 in the downhole casing 1.

[0029] Beneficially, the rotating mechanism comprises a rotating cavity 58 provided in the connecting disc 11, a rotating worm shaft 59 rotatably connected between the end walls of the rotating cavity 58, the rotating worm shaft 59 being in power connection with a rotating motor fixedly installed in the connecting disc 11, a rotating worm 9 fixedly installed on the outer surface of the rotating worm shaft 59, the rotating worm 9 meshing with a rotating worm wheel 60, the rotating worm wheel 60 being fixedly installed on the outer surface of a rotating worm wheel shaft 61, the rotating worm wheel shaft 61 being rotatably installed on the end walls of the rotating cavity 58, the connecting cylinder 16 being fixedly connected between the rotating worm wheel shafts 61; When working, the rotating motor is started, thus driving the rotating worm shaft 59 to rotate, thus driving the rotating worm 9 to rotate, the rotating worm 9 meshing with the rotating worm wheel 60, thus driving the rotating worm wheel shaft 61 to rotate, thus driving the connecting cylinder 16 to rotate.

[0030] Beneficially, the monitoring mechanism comprises a threaded groove provided on the lower side surface of the connecting disc 11, a transparent cover 30 is threadedly connected in the threaded groove, a plurality of light source adjusting seats 100 are uniformly and circumferentially arranged on the bottom wall of the connecting disc 11, a light source 57 is arranged on the light source adjusting seat 100, a monitoring probe 56 is arranged on the bottom wall of the connecting disc 11, a wire 7 is connected between the connecting disc 11 and the control console 8, a control processor is arranged in the control console 8, and the control processor is signal-connected with the electrical components in the device. In operation, the light source adjusting seat 100 is adjusted during the movement of the connecting disc 11, so that the light source 57 is adjusted to a corresponding angular position, the light source 57 is turned on to provide light for the monitoring probe 56, the monitoring probe 56 transmits the position information of the position to be repaired in the inside of the downhole casing 1 to the control processor in the control console 8 through the wire 7, the control processor sends a corresponding control signal after processing, the control signal is transmitted to the corresponding electrical components through the wire 7, the corresponding electrical components move to control the movement of the electrical components, and the repair efficiency is improved.

[0031] The application provides a downhole casing patch repair method based on the downhole casing patch repair device. Step one: the hoisting mechanism moves to drive the hoisting rope 6 to move, so that the connecting disc 11 and the connecting barrel body 16 are hoisted into the downhole casing 1, and the connecting disc 11 and the connecting barrel body 16 move in the downhole casing 1, thereby facilitating the repair of the downhole casing 1; Step two: the movement support mechanism moves to support the movement of the connecting disc 11 and the connecting barrel body 16 in the downhole casing 1, thereby increasing the stability of the movement; Step three: the monitoring mechanism moves to monitor the position to be repaired during the movement; Step four: the rotating mechanism moves to rotate the connecting barrel body 16, thereby facilitating the repair; Step five: the repair mechanism moves to repair the downhole casing 1, so that the repair patch 26 is pasted on the position to be repaired on the inside of the downhole casing 1, and can adapt to repair in different directions; Step six: after the pasting is completed, the rolling mechanism moves to roll the pasted repair patch 26; Step seven: the edge gluing mechanism moves to glue the edge of the pasted repair patch 26, thereby sealing and tightly adhering the edge of the repair patch 26; Step eight: the compression mechanism moves to fully compress the repair patch 26.

[0032] It is to be understood that the terminology used herein such as first and second, and the like, is only used to distinguish one entity or action from another entity or action, and does not necessarily require or imply any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0033] While embodiments of the present application have been shown and described, it is to be understood that the embodiments described are merely divergences, modifications, replacements and variations of the embodiments of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A downhole casing patch repair device, characterized in that: The system includes a downhole casing (1), which is connected to an upper connecting plate (11) via a hoisting mechanism. A connecting cylinder (16) connects the upper and lower connecting plates (11) via a rotating mechanism. A motion support mechanism is provided on the connecting plate (11) to support its movement within the downhole casing (1). Several repair mechanisms are provided on the outer surface of the connecting cylinder (16) for repairing the inside of the downhole casing (1) and attaching patches. An edge gluing mechanism is provided on the upper connecting cylinder (16), which is used to apply glue to the edge of the patch after patching. A rolling mechanism is provided on the surface of the connecting cylinder (16) on the opposite side of the edge gluing mechanism, which is used to press the patch tightly. A pressing mechanism is provided on the connecting cylinder (16) above the rolling mechanism, which is used to press the patch tightly for the final time. A monitoring mechanism is connected to the lower connecting disc (11), which is used to monitor the position inside the downhole casing (1) that needs to be repaired.

2. The downhole casing patch repair device according to claim 1, characterized in that: The repair mechanism includes a repair electric push rod (82) mounted on the connecting cylinder (16). One end of the repair electric push rod (82) is poweredly connected to a miniature adjusting motor fixedly installed inside the connecting cylinder (16). The other end of the repair electric push rod (82) is fixedly connected to a repair connecting plate (83). Several first groove blocks (84) are symmetrically arrayed and fixedly installed on the repair connecting plate (83). A hinge shaft (29) is rotatably connected to the first groove block (84). 9) A rotating rod (86) is fixedly installed on the outer surface. A return torsion spring (85) is connected between the rotating rod (86) and the side wall of the first groove block (84). The return torsion spring (85) is sleeved on the surface of the hinge shaft (29). A slide rod (89) is slidably connected inside the rotating rod (86). A clamping spring (40) is connected to one end of the slide rod (89) inside the rotating rod (86). A connecting shaft (87) is fixedly connected to the other end of the slide rod (89). The connecting shaft (87) is rotatably connected to the first groove block (84). On the two grooved blocks (88), the second grooved blocks (88) are evenly and fixedly installed on the inner surface of the deformable plate (90). A hollow tube (92) is fixedly connected to the middle position of the repair connecting plate (83). A tightening slide rod (91) is slidably connected inside the hollow tube (92). One end of the tightening slide rod (91) is connected to a push spring (93) inside the hollow tube (92). The other end of the tightening slide rod (91) is fixedly connected to the deformable plate (90). The deformable plate (90) has a certain elasticity. Adsorption plates (28) are symmetrically fixedly installed on the outer surface of the deformable plate (90). A repair patch (26) is adsorbed and connected on the adsorption plate (28). The adsorption plate (28) is connected to the air pump (32) through an air extraction pipe (31). The air pump (32) is fixedly installed on the connecting cylinder (16). Several spherical clamping blocks (27) are uniformly fixedly installed on the outer surface of the deformable plate (90) between the adsorption plates (28). The spherical clamping blocks (27) are in contact with the repair patch (26).

3. The downhole casing patch repair device according to claim 2, characterized in that: The edge coating mechanism includes a coating worm cavity (62) inside the connecting cylinder (16). A coating worm shaft (66) is rotatably connected between the end walls of the coating worm cavity (62). The coating worm shaft (66) is poweredly connected to a coating angle adjustment motor fixedly installed inside the connecting cylinder (16). A coating worm (65) is fixedly installed on the outer surface of the coating worm shaft (66). The coating worm (65) meshes with a coating worm wheel (63). The coating worm wheel (63) is fixedly installed on the coating worm. The outer surface of the worm gear shaft (64) is through which the glue-coated worm gear shaft (64) is rotatably mounted between the end walls of the glue-coated worm cavity (62). A glue-coated vertical groove frame (20) is fixedly mounted at the end of the glue-coated worm gear shaft (64). A vertical electric screw (38) is rotatably connected to the glue-coated vertical groove frame (20). A vertical nut block (39) that slides on the glue-coated vertical groove frame (20) is threadedly connected to the outer surface of the vertical electric screw (38). A glue-coated nut block (39) is fixedly mounted on the vertical nut block (39). A transverse groove frame (21) is provided, on which a transverse electric lead screw (41) is rotatably connected. A transverse nut block (22) is threadedly connected to the outer surface of the transverse electric lead screw (41) and slidably connected to the transverse groove frame (21). An electric push rod (23) for applying glue is fixedly connected to the end wall of the transverse nut block (22). An adhesive spray nozzle (24) is fixedly connected to the end of the electric push rod (23). One side of the adhesive spray nozzle (24) is connected to one side of the glue delivery pipe (25). At the end, the other end of the glue delivery tube (25) is connected to the sealant storage cavity (55) located in the connecting cylinder (16). An extrusion electric push rod (53) is fixedly connected to the top wall of the sealant storage cavity (55). An extrusion slide plate (54) is fixedly connected to the lower end of the extrusion electric push rod (53). The extrusion slide plate (54) is slidably connected to and sealed with the sealant storage cavity (55). The end wall of the sealant storage cavity (55) is smooth, and the bottom wall of the extrusion slide plate (54) is smooth.

4. The downhole casing patch repair device according to claim 3, characterized in that: The rolling mechanism includes a rolling groove frame (33) symmetrically arranged on the connecting cylinder (16) and the glue-applying vertical groove frame (20). A rolling electric screw (67) is rotatably connected to the rolling groove frame (33). A rolling nut block (34) is threadedly connected to the rolling electric screw (67) and slidably connected to the rolling groove frame (33). A rolling electric telescopic shaft (35) is fixedly installed on the end wall of the rolling nut block (34). A rolling groove block (36) is fixedly connected to the end of the rolling electric telescopic shaft (35). A rolling wheel (37) is hinged on the rolling groove block (36).

5. The downhole casing patch repair device according to claim 4, characterized in that: The clamping mechanism includes a clamping gear cavity (52) provided inside the connecting cylinder (16). A clamping drive shaft (48) is rotatably connected to the top of the clamping gear cavity (52). The clamping drive shaft (48) is poweredly connected to a clamping motor fixedly installed inside the connecting cylinder (16). A clamping turntable (49) is fixedly connected to the lower end of the clamping drive shaft (48). A clamping ring rack (50) is fixedly connected to the lower part of the clamping turntable (49). The clamping ring rack (50) meshes with several clamping gears (51). The gear (51) is fixedly installed at the end of the clamping screw (47), which is rotatably installed through the end wall of the clamping gear cavity (52). The clamping screw (47) is threadedly connected to the clamping threaded cylinder (19), which is slidably connected in the fixed slide cylinder (18). The fixed slide cylinder (18) is fixedly installed on the connecting cylinder (16). A clamping roller frame (15) is fixedly installed at the end of the clamping threaded cylinder (19), and a clamping roller (14) is hinged on the clamping roller frame (15).

6. The downhole casing patch repair device according to claim 5, characterized in that: The motion support mechanism includes a bevel gear cavity (42) within the connecting disk (11). A support drive shaft (46) is rotatably connected to the end wall of the bevel gear cavity (42). The support drive shaft (46) is poweredly connected to a motion support motor fixedly installed within the connecting disk (11). A driving bevel gear (45) is fixedly connected to the end of the support drive shaft (46). The driving bevel gear (45) meshes with a driven bevel gear (43). The driven bevel gear (43) is fixedly installed at the end of a support screw (44). The support screw (44) is rotatably mounted through the end wall of the bevel gear cavity (42). The support screw (44) is threadedly connected to a support threaded cylinder (12). The support threaded cylinder (12) is rotatably connected through the connecting disk (11). A support frame (13) is fixedly connected to the end of the support threaded cylinder (12). A support wheel mounting shaft (99) is rotatably connected to the support frame (13). A support wheel (17) is fixedly mounted on the outer surface of the support wheel mounting shaft (99). The support wheel mounting shaft (99) extends into the brake cavity (94) located in the support frame (13). A brake electric screw (97) is symmetrically rotatably connected between the end walls of the brake cavity (94). The brake electric screw (97) is threadedly connected to the brake nut plate (95). A brake tooth (96) is fixedly mounted on the end wall of the brake nut plate (95). The brake tooth (96) meshes with a brake gear (98). The brake gear (98) is fixedly mounted on the outer surface of the support wheel mounting shaft (99) in the brake cavity (94).

7. A downhole casing patch repair device according to claim 6, characterized in that: The hoisting mechanism includes a hoisting frame (4) located on the upper part of the downhole casing (1). Several roller frame connecting shafts (10) are rotatably connected to the bottom of the hoisting frame (4). Roller frames (3) are fixedly connected to the lower ends of the roller frame connecting shafts (10). Rollers (2) are hinged to the roller frames (3). Hoisting gear cavities (68) are symmetrically arranged inside the hoisting frame (4). A hoisting drive gear shaft (72) is rotatably connected between the end walls of one side of the hoisting gear cavity (68). The hoisting drive gear shaft (72) is powered by a hoisting motor fixedly installed on the hoisting frame (4). A hoisting drive gear (71) is fixedly installed on the outer surface of the hoisting drive gear shaft (72). The hoisting drive gear (71) meshes with the hoisting driven gear (69). The hoisting driven gear (69) is fixedly installed on the outer surface of the hoisting rotating shaft (70). The hoisting rotating shaft (70) is rotatably installed through the hoisting gear cavity (68). An annular hollow frame (73) is fixedly installed in the hoisting gear cavity (68) on the other side. A brake drive gear shaft (74) is rotatably connected in the annular hollow frame (73). The brake drive gear shaft (74) is fixedly installed in the annular hollow frame (73). The brake motor is powered within the hollow frame (73). A brake drive gear (75) is fixedly connected to the end of the brake drive gear shaft (74). The brake drive gear (75) meshes with a brake ring rack (79). The brake ring rack (79) is rotatably mounted on the hollow ring frame (73). The brake ring rack (79) meshes with several brake driven gears (77). The brake driven gears (77) are fixedly mounted on the outer surface of the brake lead screw (78). The brake lead screw (78) is rotatably mounted on the hollow ring frame (73). The outer surface of the device is threaded with a brake threaded cylinder (80), which is slidably connected to the annular hollow frame (73). The end of the brake threaded cylinder (80) is fixedly connected with a brake plug (81), which engages with a brake disc (76). The brake disc (76) is fixedly installed on the outer surface of the hoisting shaft (70). A winch (5) is fixedly installed on the outer surface of the hoisting shaft (70), and a hoisting rope (6) is wound around the winch (5). The end of the hoisting rope (6) is connected to the upper part of the connecting disc (11) on the upper side.

8. A downhole casing patch repair device according to claim 7, characterized in that: The rotating mechanism includes a rotating cavity (58) provided in the connecting disk (11), a rotating worm shaft (59) rotatably connected between the end walls of the rotating cavity (58), the rotating worm shaft (59) being poweredly connected to a rotating motor fixedly installed in the connecting disk (11), a rotating worm (9) being fixedly installed on the outer surface of the rotating worm shaft (59), the rotating worm (9) meshing with a rotating worm wheel (60), the rotating worm wheel (60) being fixedly installed on the outer surface of the rotating worm wheel shaft (61), the rotating worm wheel shaft (61) being rotatably installed through the end wall of the rotating cavity (58), and the connecting cylinder (16) being fixedly connected between the rotating worm wheel shafts (61).

9. A downhole casing patch repair device according to claim 8, characterized in that: The monitoring mechanism includes a threaded groove on the lower surface of the connecting plate (11) on the lower side, a transparent cover (30) is threaded into the threaded groove, a number of light source adjustment seats (100) are uniformly arranged in a circular array on the bottom wall of the connecting plate (11), a light source (57) is installed on the light source adjustment seat (100), a monitoring probe (56) is installed on the bottom wall of the connecting plate (11), a wire (7) is connected between the connecting plate (11) and the control console (8), a control processor is provided in the control console (8), and the control processor is signal connected to the electrical components in the device.

10. A method for patch repair of downhole casing, based on the patch repair device for downhole casing as described in claim 9, characterized in that: The steps include: Step 1: The hoisting mechanism moves, thereby driving the hoisting rope (6) to move, thereby hoisting the connecting disc (11) and the connecting cylinder (16) into the downhole casing (1), so that the connecting disc (11) and the connecting cylinder (16) can move inside the downhole casing (1), making it easier to repair the downhole casing (1); Step 2: The motion support mechanism moves to support the movement of the connected disc (11) and the connecting cylinder (16) within the downhole casing (1), thereby increasing the stability of the movement; Step 3: During the process, the monitoring mechanism moves to monitor the location that needs repair. Step 4: The rotating mechanism moves, causing the connecting cylinder (16) to rotate, which facilitates repair; Step 5: The repair mechanism moves to repair the inside of the downhole casing (1), so that the repair patch (26) is pasted on the inside of the downhole casing (1) at the location that needs to be repaired, and can adapt to repairs in different directions; Step 6: After pasting is completed, the rolling mechanism moves to roll the pasted repair patch (26); Step 7: The edge gluing mechanism moves to apply glue to the edge of the repair patch (26) after it has been pasted and repaired, thereby sealing and bonding the edge of the repair patch (26). Step 8: The clamping mechanism moves to fully clamp the repair patch (26) that has been repaired and pasted.

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