CN116006114A - Repairing device for underground petroleum casing damage - Google Patents

Abstract

The invention relates to the technical field of petroleum casing pipe repair, in particular to a repair device for underground petroleum casing pipe damage. The utility model provides a prosthetic devices for oil casing damage in pit, including the dead lever, the dead lever is provided with control terminal, the dead lever is provided with the fender dish of symmetric distribution, keep away from the fender dish and the dead lever rigid coupling of sleeve pipe mouth one side, be close to fender dish and dead lever sliding connection of sleeve pipe mouth one side, the rigid coupling has first extension spring between the fender dish of symmetric distribution, the fender dish of symmetric distribution all articulates there is the equidistant connecting rod of distribution of circumference, articulated between the connecting rod of symmetric distribution has the braced frame, the braced frame internal rotation is connected with the leading wheel of symmetric distribution. According to the invention, the central axis of the fixing rod is overlapped with the central axis of the sleeve through the elasticity of the first tension spring, so that the problem that the sleeve is damaged due to collision with the inner wall of the sleeve in the process of putting the repairing device into the sleeve is solved.

Description

Repairing device for underground petroleum casing damage

Technical Field

The invention relates to the technical field of petroleum casing pipe repair, in particular to a repair device for underground petroleum casing pipe damage.

Background

In the process of petroleum exploitation, a sleeve is generally arranged in an oil well, broken stones on the well wall are prevented from falling off to smash an oil pipe, and subsequent well cementation is convenient, but in the process of sleeve installation, due to complex geological conditions, such as inclined wells, horizontal wells and the like, the sleeve is damaged due to collision between the sleeve and the well wall in the process of putting the sleeve into the oil well.

In the prior art, for example, patent with publication number 201810199722.2 discloses a petroleum casing chemical method repairing device, which has the technical scheme that: the outer wall of the central tube is fixedly connected with a reaction auxiliary cylinder sleeve, an aluminothermic reactant is filled in the inner cavity of the reaction auxiliary cylinder sleeve, a plurality of inclined holes are formed in the outer wall of the reaction auxiliary cylinder sleeve, and the inclined holes are blocked by tin plugs; the device solves the problems that the thermit reaction is initiated by throwing a reaction induction pipe column, the bottom of the reaction induction pipe column is provided with an electric heating pipe, and a wellhead is connected to the electric heating pipe through a cable to heat thermit reaction raw materials in the inner cavity of a fire-resistant protective sleeve, and the construction process is relatively troublesome.

But this device has the following problems:

1. in the process of putting in the sleeve, the device cannot be guaranteed to be positioned in the center of the sleeve, so that the device is easy to collide with the inner wall of the sleeve, and the sleeve is damaged.

2. The second packer of the device needs to be independently installed in the installation process, and the workload of operators is increased.

3. The molten iron generated by the thermite reaction of the device forms a ring shape between the inner wall of the sleeve and the device, and if only a damaged hole on the sleeve needs to be filled, the thermite reaction agent is wasted, and the subsequent polishing amount is increased.

4. After filling, the device needs to put the grinding shoes into the sleeve to polish the inner wall of the sleeve, and the operation process is complex.

Disclosure of Invention

In order to overcome the technical problems, the abrasion-proof repairing device for the damage of the underground petroleum casing is provided.

The utility model provides a prosthetic devices for damaged oil casing in pit, including the dead lever, the dead lever is provided with control terminal, the dead lever is provided with the baffle dish of symmetric distribution, be provided with the sleeve pipe in the oil well, the sleeve pipe is provided with the hole, keep away from the baffle dish and the dead lever rigid coupling of sleeve pipe mouth one side, be close to baffle dish and dead lever sliding connection of sleeve pipe mouth one side, the rigid coupling has first extension spring between the baffle dish of symmetric distribution, the baffle dish of symmetric distribution all articulates there is the connecting rod of circumference equidistant distribution, articulate between upper and lower adjacent connecting rod has the braced frame, the braced frame internal rotation is connected with the leading wheel of symmetric distribution, the dead lever is provided with the positioning mechanism that is used for detecting the hole position, positioning mechanism is located the right side of dead lever lower part, be provided with the slip casting subassembly that is used for shutoff hole on the positioning mechanism; the fixed rod is provided with a plugging assembly for plugging the sleeve, the plugging assembly is positioned at the lower end of the fixed rod, the plugging assembly comprises a plugging shell, the plugging shell is fixedly connected to the lower end of the fixed rod, the plugging shell is fixedly connected with an air bag, the plugging shell is provided with a vent hole communicated with the air bag, a pushing disc which is in sliding connection with the fixed rod is slidably connected in the plugging shell, the plugging shell is filled with protective sand positioned at the upper side of the pushing disc, a second tension spring is fixedly connected between the pushing disc and the plugging shell, the fixed rod is arranged as a hollow rod with the lower end plugged, the fixed rod is provided with an air inlet hole, and the air inlet hole of the fixed rod is positioned at the lower side of the pushing disc; the elasticity of the first tension spring enables the supporting frame, the connecting rod and the baffle disc to coincide the central axis of the fixed rod with the central axis of the sleeve.

Preferably, the positioning mechanism comprises a servo motor electrically connected with the control terminal, the servo motor is fixedly connected with a fixed rod, an output shaft of the servo motor is fixedly connected with a first gear, the fixed rod is rotationally connected with a rotating sleeve positioned at the lower side of the baffle disc, the rotating sleeve is fixedly connected with a second gear meshed with the first gear, the rotating sleeve is fixedly connected with a first gas storage shell, the first gas storage shell is positioned at the right side of the rotating sleeve, the first gas storage shell is fixedly connected with an air pump electrically connected with the control terminal, the air pump is communicated with a second gas storage shell, a pressure sensor electrically connected with the control terminal is fixedly connected in the second gas storage shell, a first gas guide pipe and a second gas guide pipe are communicated between the first gas storage shell and the second gas storage shell, electromagnetic valves electrically connected with the control terminal are arranged in the first gas guide pipe and the second gas guide pipe, the first gas storage shell is provided with a detection assembly for detecting the position of a hole, the rotating sleeve is provided with a polishing mechanism for polishing the sleeve, and the first gas storage shell is provided with an adjusting mechanism for positioning the hole.

Preferably, the detection assembly comprises a plugging plate fixedly connected in a first gas storage shell, one side, far away from the rotating sleeve, of the first gas storage shell is slidably connected with a first piston disc, a limiting ring used for limiting the first piston disc is fixedly connected in the first gas storage shell, the plugging plate, the first piston disc and the first gas storage shell are matched to form a first cavity, one side, far away from the first piston disc, of the plugging plate is matched with the first gas storage shell to form a second cavity, one side, far away from the plugging plate, of the first gas storage shell is provided with a through hole, the first gas storage shell is in limiting sliding connection with a sliding tube fixedly connected with the first piston disc, the sliding tube is communicated with the first cavity, the sliding tube is communicated with a rectangular shell, the rectangular shell is communicated with third gas storage shells which are distributed at equal intervals, sliding rods are in limiting sliding mode in the third gas storage shells which are distributed at equal intervals, a second piston disc which is in limiting sliding connection with the adjacent third gas storage shells is fixedly connected with one end, which is far away from the second piston disc is rotationally connected with a ball, friction force between the second piston disc and the third gas storage shell is larger than friction force between the first piston disc and the first gas storage shell, and the first gas storage shell is provided with an adjusting mechanism used for adjusting holes.

Preferably, the adjusting mechanism comprises a fourth gas storage shell, the fourth gas storage shell is fixedly connected to the first gas storage shell and is communicated with the second cavity, a first spline rod is connected in the fourth gas storage shell in a sliding mode, a third piston disc fixedly connected with the first spline rod is connected to the fourth gas storage shell in a sliding mode, a through hole is formed in one end, far away from the first gas storage shell, of the fourth gas storage shell, an L-shaped rod is fixedly connected to one end, far away from the fourth gas storage shell, of the first spline rod, a second spline rod is fixedly connected to the L-shaped rod, a sliding sleeve is connected to the second spline rod in a sliding mode, a U-shaped frame is fixedly connected between the U-shaped frame and the second spline rod, and a grouting assembly for plugging a hole is arranged on the U-shaped frame.

Preferably, the slip casting subassembly is including the stopper, the stopper rigid coupling is in the U-shaped frame, the stopper is provided with spacing hole and spacing groove, the spacing groove is located the downside in spacing hole, distance between spacing hole and the spacing groove equals with the distance between two adjacent slide bars, the diameter in spacing hole equals with the diameter of slide bar, the stopper is close to sheathed tube one side rigid coupling and has sealed frame, the stopper inlays the honeycomb duct, the honeycomb duct intercommunication has the storage casing, the rigid coupling has the connection pad of symmetric distribution in the storage casing, the rigid coupling has the baffle of circumference equidistant distribution between the connection pad of symmetric distribution, the material of storage casing, connection pad and baffle is thermal insulation material, the connection pad that is close to stopper one side is provided with the through-hole of circumference distribution, all the rigid coupling has the baffle in the through-hole of baffle circumference distribution, the material of baffle is combustible material, circumference equidistant distribution's baffle and circumference distribution's baffle are crisscross distributed, be provided with circumference distribution's chucking hole apart from the connection pad, all install the magnesium strip in the connection pad circumference distribution's chucking hole, circumference equidistant distribution's baffle and circumference distribution's magnesium strip crisscross distribution, the material is filled with the thermite, the material is filled in the storage casing, the setting up the adjacent some igniters of circumference of magnesium strip that distributes of circumference.

Preferably, one side of the sealing frame, which is close to the inner wall of the sleeve, is provided with an arc-shaped surface for increasing the contact area between the sealing frame and the inner wall of the sleeve, and the sealing frame is made of high-temperature-resistant elastic material for increasing the tightness between the sealing frame and the sleeve.

Preferably, the top of the limiting groove is flush with the center point of the limiting block in height for filling the hole.

Preferably, the polishing mechanism comprises a fifth gas storage shell, the fifth gas storage shell is fixedly connected to the rotating sleeve, the fifth gas storage shell and the first gas storage shell are located at the same height, an included angle is reserved between the fifth gas storage shell and the first gas storage shell, a third gas guide pipe is communicated between the fifth gas storage shell and the second gas storage shell, an electromagnetic valve electrically connected with the control terminal is arranged in the third gas guide pipe, the fifth gas storage shell is slidably connected with a third spline rod, a fourth piston disc fixedly connected with the third spline rod is slidably connected in the fifth gas storage shell, a through hole is formed in one side, far away from the rotating sleeve, of the fifth gas storage shell, a connecting frame is fixedly connected to one end, far away from the fourth piston disc, of the third spline rod, an electric roller electrically connected with the control terminal is rotationally connected to the connecting frame, a polishing shell used for polishing the inner wall of the sleeve is arranged on the outer side face of the electric roller, the connecting frame is rotationally connected with symmetrically distributed limiting rollers, and the outer diameter of the limiting rollers is equal to the outer diameter of the polishing shell.

Preferably, the plugging shell is fixedly connected with an interception ring, the interception ring is provided with an inclined plane, the diameter of the upper side of the interception ring is larger than that of the lower side of the interception ring, a gap is reserved between the diameter of the outer side of the interception ring and the inner wall of the sleeve, and the interception ring is made of elastic materials and used for intercepting protective sand.

The invention has the following advantages:

1. the supporting frame, the connecting rod and the baffle disc are enabled to coincide the central axis of the fixing rod with the central axis of the sleeve through the elastic force of the first tension spring, so that the problem that the sleeve is damaged due to collision between the repairing device and the inner wall of the sleeve in the process of putting the repairing device into the sleeve is solved.

2. Through with shutoff subassembly direct mount on this prosthetic devices, but not install alone, reduce the process of installation shutoff subassembly, and directly accomplish the packing of protection sand after the shutoff subassembly installation is accomplished, and when filling the hole of different co-altitude, need not to dismantle alone and install again, the shutoff subassembly removes simultaneously along with this prosthetic devices, carries out quick shutoff, saves the installation time of shutoff subassembly.

3. Through the accurate positioning to the hole to align slip casting subassembly and hole, reduce the use amount of thermite reactant, the casing of being convenient for polish to the casing inner wall of polishing later, and this prosthetic devices once put into the time in the pit, pack a plurality of holes, avoid frequently going into this prosthetic devices down, reduce the loaded down with trivial details degree to the hole filling process, the operating personnel of being convenient for uses.

4. Through installing grinding machanism on this prosthetic devices, directly polish it after the hole is filled and is accomplished, need not to put the mill shoe into the sleeve pipe and polish, save operating time.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of the components such as the baffle disc, the supporting frame, the connecting rod and the like.

Fig. 3 is a schematic perspective view of the positioning mechanism of the present invention.

Fig. 4 is a partial cross-sectional view of a perspective structure of the positioning mechanism of the present invention.

Fig. 5 is a schematic perspective view of a detection assembly according to the present invention.

Fig. 6 is an enlarged perspective view of fig. 5 a according to the present invention.

Fig. 7 is an enlarged perspective view of fig. 5B according to the present invention.

Fig. 8 is a schematic perspective view of an adjusting mechanism according to the present invention.

Fig. 9 is a perspective view of a grouting assembly according to the present invention.

Fig. 10 is a schematic perspective view of a sealing frame of the present invention.

FIG. 11 is a cross-sectional view of a slide bar and stopper of the present invention in a perspective view.

FIG. 12 is a partial cross-sectional view of a perspective of the grinding mechanism of the invention.

Fig. 13 is a partial cross-sectional view of a solid structure of a closure assembly of the present invention.

In the reference numerals: 1-fixed rod, 101-sleeve, 102-hole, 2-baffle disc, 3-first tension spring, 4-connecting rod, 5-supporting frame, 6-guide wheel, 701-servo motor, 702-first gear, 703-rotating sleeve, 704-second gear, 705-first gas storage shell, 7051-first cavity, 7052-second cavity, 706-air pump, 707-second gas storage shell, 708-pressure sensor, 709-first gas guide tube, 710-second gas guide tube, 711-sealing plate, 712-first piston disc, 713-sliding tube, 714-rectangular shell, 715-third gas storage shell, 716-sliding rod, 717-second piston disc, 801-fourth gas storage shell, 802-first spline rod, 803-third piston disc, 804-L-shaped rod, 805-second spline rod, 806-sliding sleeve, 807-U-shaped frame, 808-spring, 809-stopper, 8091-stopper hole, 8092-stopper groove, 810-sealing frame, 811-guiding tube, 812-storage shell, 813-connecting disc, 814-baffle, 815-stopper, 816-magnesium strip, 817-igniter, 901-fifth storage shell, 902-third air duct, 903-third spline rod, 904-fourth piston disc, 905-connecting frame, 906-electric roller, 907-stopper roller, 1001-stopper shell, 1002-air bag, 1003-pushing disc, 1004-second tension spring, 1005-interception ring.

Detailed Description

The above-described aspects are further described below in conjunction with specific embodiments. It should be understood that these examples are illustrative of the present application and are not limiting the scope of the present application. The implementation conditions used in the examples may be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are generally those in routine experiments.

Example 1

A prosthetic devices for damaged oil casing in pit, as shown in fig. 1 and 2, including dead lever 1, dead lever 1 is provided with control terminal (not shown in the figure), dead lever 1 is provided with two upper and lower symmetric distribution's fender dish 2, be provided with sleeve pipe 101 in the oil well, sleeve pipe 101 is provided with hole 102, the fender dish 2 of downside and dead lever 1 rigid coupling, the fender dish 2 of upside and dead lever 1 sliding connection, the rigid coupling has first extension spring 3 between the fender dish 2 of symmetric distribution, the fender dish 2 of symmetric distribution all articulates there are three circumference equidistant connecting rod 4 that distribute, articulate between the connecting rod 4 of upper and lower adjacent and have braced frame 5, make braced frame 5 through the elasticity of first extension spring 3, connecting rod 4 and fender dish 2 coincide the central axis of dead lever 1 with sleeve pipe 101's central axis, guarantee that this prosthetic devices goes into the in-process of sleeve pipe 101 can not collide with sleeve pipe 101 inner wall, cause sleeve pipe 101 damaged problem, braced frame 5 rotation is connected with two guide wheels 6 that are upper and lower symmetric distribution, dead lever 1 is provided with the locating mechanism 1, it is used for detecting hole 102 position location mechanism to set up and is located the shutoff assembly 1 of dead lever 1 side, the shutoff assembly is located down side 1. The plugging component is positioned at the lower end of the fixed rod 1.

As shown in fig. 3-7, the positioning mechanism comprises a servo motor 701 electrically connected with a control terminal, the servo motor 701 is welded on a fixed rod 1, an output shaft end of the servo motor 701 is in spline connection with a first gear 702, the fixed rod 1 is rotationally connected with a rotating sleeve 703 positioned at the lower side of a baffle disc 2, the rotating sleeve 703 is welded with a second gear 704 meshed with the first gear 702, a first air storage shell 705 is fixedly connected with the middle part of the rotating sleeve 703, the first air storage shell 705 is positioned at the right side of the rotating sleeve 703, an air pump 706 electrically connected with the control terminal is fixedly connected at the right part of the lower side of the first air storage shell 705 through a supporting plate, the left side of the air pump 706 is communicated with a second air storage shell 707, a pressure sensor 708 electrically connected with the control terminal is fixedly connected in the second air storage shell 707 for detecting the pressure in the second air storage shell 707, a first air guide pipe 709 and a second air guide pipe 710 are communicated between the first air storage shell 705 and the second air guide pipe 710, electromagnetic valves electrically connected with the control terminal are respectively arranged in the first air guide pipe 709 and the second air guide pipe 710, a detection assembly 102 is arranged at the right part of the lower side of the first air storage shell 705, a polishing mechanism is arranged for polishing the polishing mechanism 102, and a casing 102 is arranged.

As shown in fig. 3-7, the detection assembly includes a plugging plate 711, the plugging plate 711 is welded in the first gas storage housing 705, a first piston disc 712 is slidingly connected to the right side of the first gas storage housing 705, a limiting ring for limiting the first piston disc 712 is welded in the first gas storage housing 705, the limiting ring is located on the left side of the first piston disc 712, the plugging plate 711, the first piston disc 712 and the first gas storage housing 705 are matched to form a first cavity 7051, the first cavity 7051 is communicated with the second gas storage housing 707 through a first gas guide pipe 709, the first gas storage housing 705 is matched with the left side of the plugging plate 711 to form a second cavity 7052, a through hole is formed in the right side of the first gas storage housing 705, the first piston disc 712 moves rightwards, gas on the right side of the first piston disc 712 is discharged through the through hole of the first gas storage housing 712, the first gas storage housing 705 is slidingly limited with a sliding tube 713 communicated with the first piston disc 712, the right end of the sliding tube 713 is communicated with a rectangular housing 714, the rectangular housing is communicated with a third housing 715 distributed at equal intervals up and down, the third housing is slidingly connected with the right side of the first piston disc 716 through the sliding rod 716, and the third housing 716 is slidingly connected with the third piston disc 715 is in the first sliding friction housing 716, and the third housing 715 is slidingly connected with the third housing 716, and the third sliding rod is provided with the third sliding rod 716 is provided with a large friction between the third housing 716.

As shown in fig. 3, fig. 4 and fig. 8-fig. 11, the adjusting mechanism comprises a fourth air storage shell 801, the fourth air storage shell 801 is welded on the left side of the first air storage shell 705 and is communicated with the second cavity 7052, a first spline rod 802 is slidably connected to the upper portion of the fourth air storage shell 801, a third piston plate 803 welded with the first spline rod 802 is slidably connected to the fourth air storage shell 801, a through hole is formed in the upper end of the fourth air storage shell 801, an L-shaped rod 804 is fixedly connected to the upper end of the first spline rod 802, a second spline rod 805 is welded to the L-shaped rod 804, a sliding sleeve 806 is slidably connected to the right portion of the second spline rod 805, a U-shaped frame 807 is fixedly connected to the right end of the sliding sleeve 806, a spring 808 is fixedly connected between the U-shaped frame 807 and the second spline rod 805, and the spring 808 is located in the sliding sleeve 806, and the U-shaped frame 807 is provided with a grouting assembly for plugging the hole 102.

As shown in fig. 8-11, the grouting assembly comprises a limiting block 809, the limiting block 809 is fixedly connected to the lower side of the U-shaped frame 807, a limiting hole 8091 and a limiting groove 8092 are arranged on the left side surface of the limiting block 809, the limiting groove 8092 is positioned on the lower side of the limiting hole 8091, the top of the limiting groove 8092 is level with the center point of the limiting block 809, the distance between the limiting hole 8091 and the limiting groove 8092 is equal to the distance between two adjacent slide bars 716, the diameter of the limiting hole 8091 is equal to the diameter of the slide bars 716, the slide bars 716 enter the limiting hole 8091 to limit the limiting block 809, a sealing frame 810 is fixedly connected to the right side of the limiting block 809, one side of the sealing frame 810, which is close to the inner wall of the sleeve 101, is provided with an arc surface, the joint area of the sealing frame 810 and the inner wall of the sleeve 101 is increased, the sealing frame 810 is made of high-temperature resistant elastic material, the sealing frame 810 and the inner wall of the sleeve 101 is extruded and deformed, the extrusion force between the sealing frame 810 and the inner wall of the sleeve 101 is increased, the sealing performance between the sealing frame 810 and the sleeve 101 is increased, the limiting block 809 is embedded with the guide pipe 811, the upper part of the guide pipe 811 is communicated with the storage shell 812, the storage shell 812 is positioned in the U-shaped frame 807, symmetrically distributed connecting discs 813 are welded in the storage shell 812, circumferentially equidistant baffle plates 814 are welded between the symmetrically distributed connecting discs 813, circumferentially distributed through holes are arranged on the lower connecting discs 813, baffle blocks 815 are arranged in the circumferentially distributed through holes of the connecting discs 813, the baffle blocks 815 are made of combustible materials, the temperature in the storage shell 812 is increased, the baffle blocks 815 are heated and melt, molten iron flows downwards through the circumferentially equidistant baffle plates 814 and the circumferentially distributed baffle blocks 815 which are staggered, the material of the storage shell 812, the connecting discs 813 and the baffle plates 814 is heat insulation material, the upper connecting disc 813 is provided with circumferentially distributed clamping holes, magnesium strips 816 are all installed in the circumferentially distributed clamping holes of the connecting disc 813, circumferentially equidistant baffle 814 and circumferentially distributed magnesium strips 816 are distributed in a staggered mode, the aluminothermic reactant is filled in the storage shell 812, the circumferentially distributed igniter 817 is arranged on the upper connecting disc 813, and the circumferentially distributed igniter 817 is respectively in contact with the adjacent magnesium strips 816.

As shown in fig. 1 and 13, the plugging assembly comprises a plugging shell 1001, the plugging shell 1001 is welded at the lower end of a fixed rod 1, an air bag 1002 is installed on the outer side surface of the plugging shell 1001, the plugging shell 1001 is provided with an air hole communicated with the air bag 1002, air is filled in the air bag 1002, the pressure in the air bag 1002 is increased, the air bag 1002 expands to plug between the plugging shell 1001 and the inner wall of a sleeve 101, a push disc 1003 which is slidably connected with the fixed rod 1 is slidably connected in the plugging shell 1001, protective sand positioned on the push disc 1003 is filled in the plugging shell 1001, a second tension spring 1004 is fixedly connected between the push disc 1003 and the plugging shell 1001, the push disc 1003 moves upwards, the second tension spring 1004 is stretched, the protective sand on the upper side of the push disc 1003 is pushed upwards, the fixed rod 1 is arranged as a hollow rod with the lower end plugged, the air inlet hole of the fixed rod 1 is arranged on the lower side of the push disc 1003.

As shown in fig. 1 and 13, an interception ring 1005 is fixedly connected to the upper surface of the plugging housing 1001, the interception ring 1005 is provided with an inclined surface, the diameter of the upper side of the interception ring 1005 is larger than that of the lower side of the interception ring 1005, a gap is reserved between the diameter of the outer side of the interception ring 1005 and the inner wall of the sleeve 101, the interception ring 1005 is made of elastic materials, protective sand is reserved on the upper side of the interception ring 1005, the interception ring 1005 is extruded by the protective sand to deform, and the outer side of the interception ring 1005 contacts with the inner wall of the sleeve 101 to form a seal for intercepting the protective sand.

When the sleeve 101 with the hole 102 is needed to be repaired, an operator firstly detects the approximate position of the hole 102, then the repairing device is placed in the sleeve 101, and the repairing device is concretely operated as follows, the fixing rod 1 is a supporting part of the repairing device, the operator moves the repairing device to the upper part of the opening of the sleeve 101, the repairing device is slowly placed in a well through the fixing rod 1 perpendicular to the upper port of the sleeve 101, when the baffle disc 2 at the lower side is flush with the upper port of the sleeve 101, the operator pulls the baffle disc 2 at the upper side upwards, the first tension spring 3 is stretched, in the initial state, the distance between the supporting frame 5 and the central axis of the fixing rod 1 is larger than the radius of the sleeve 101, the upper baffle disc 2 drives the supporting frame 5 and the three connecting rods 4 at the lower side to move upwards through the three connecting rods 4 at the upper side, the three supporting frames 5 are close to each other, when the distance between the supporting frame 5 and the central axis of the fixing rod 1 is smaller than the radius of the sleeve 101, after the repairing device enters the sleeve 101, the operator releases the upper baffle disc 2, drives the upper baffle disc 2 to move downwards under the action of the elastic force of the first tension spring 3, when the guide wheels 6 on the three support frames 5 are in contact with the inner wall of the sleeve 101, the upper baffle disc 2 does not move downwards any more, the support frames 5 are not restored to the initial positions, the first tension spring 3 is in a stretching state, the central axes of the support frames 5, the connecting rods 4 and the baffle disc 2 coincide with the central axes of the fixing rods 1 and the sleeve 101 through the elastic force of the first tension spring 3, the problem that the sleeve 101 is damaged due to collision between the central axes of the fixing rods 1 and the sleeve 101 in the process of the repairing device entering the sleeve 101 is solved, when the holes 102 are positioned between the upper side surface and the lower side surface of the rectangular shell 714, the operating personnel stops to put dead lever 1 to sleeve pipe 101 in, and this prosthetic devices puts into the in-process of sleeve pipe 101, has the clearance between interception ring 1005 and the sleeve pipe 101 inner wall, guarantees that this prosthetic devices slides from top to bottom in sleeve pipe 101, and this prosthetic devices puts into and accomplishes.

Then, the operator fixes the repairing device in the sleeve 101, and the specific operation is as follows, the operator carries air to the fixing rod 1 to pressurize, along with the increase of the pressure in the fixing rod 1, the gas in the fixing rod 1 enters between the plugging shell 1001 and the pushing disc 1003 through the air inlet hole at the lower end of the fixing rod, due to the elastic force of the second tension spring 1004, the gas between the plugging shell 1001 and the pushing disc 1003 enters the air bag 1002 through the air hole of the plugging shell 1001, the pressure in the air bag 1002 increases, the air bag 1002 expands to plug the space between the plugging shell 1001 and the inner wall of the sleeve 101, and due to the high-pressure gas in the air bag 1002, the friction force between the air bag 1002 and the inner wall of the sleeve 101 increases, the repairing device is supported, the repairing device is prevented from sliding down along the inner wall of the sleeve 101, and the repairing device is fixed in the sleeve 101.

After the fixing of the repairing device is completed, an operator fills protective sand to the lower side of the hole 102 in the sleeve 101, the concrete operation is as follows, after the air bag 1002 is plugged, the pressure in the fixing rod 1 is continuously increased, the air pressure between the plugging shell 1001 and the push disc 1003 is gradually increased, the push disc 1003 is pushed to move upwards, the second tension spring 1004 is stretched, the push disc 1003 pushes the protective sand on the upper side of the push disc upwards, when the protective sand contacts with the lower side of the inner side of the interception ring 1005, the protective sand gradually fills the protective sand along the inner side of the interception ring 1005 upwards, and in the process that the protective sand gradually fills the inner side of the interception ring 1005, the protective sand has a weight, the interception ring 1005 is made of an elastic material, the outer side of the protective sand is extruded by the interception ring 1005, the outer side of the protective sand contacts with the inner wall of the sleeve 101 to form a seal, the gap between the interception ring 1005 and the inner wall of the sleeve 101 is prevented, after the protective sand fills the upper side of the push disc 1003 and the interception ring, the operator stops pressurizing the fixing rod 1, and the protective sand is prevented from being filled up, and the upper side of the sleeve 101 is completely filled with petroleum.

After the completion of the filling of the protective sand, the operator adjusts the positioning mechanism to the measurement state, specifically, the operation is such that the operator activates the air pump 706 to inflate the second air storage housing 707 through the control terminal, in the initial state, the solenoid valves in the first air guide pipe 709 are in the open state, the solenoid valves in the second air guide pipe 710 and the third air guide pipe 902 are in the closed state, and since the second air storage housing 707, the first air guide pipe 709, the first cavity 7051, the slide pipe 713, the rectangular housing 714 and the third air storage housing 715 are in the communication state, the air pump 706 inflates the second air storage housing 707, the pressure in the above-mentioned cavities (the second air storage housing 707, the first air guide pipe 709, the first cavity 7051, the slide pipe 713, the rectangular housing 714 and the third air storage housing 715) is simultaneously increased, since the friction force between the second piston disc 717 and the third air storage housing 715 is greater than the friction force between the first piston disc 712 and the first air storage housing 705, therefore, the first piston disc 712 slides relative to the first air storage housing 705, the second piston disc 717 cannot slide relative to the third air storage housing 715, the first piston disc 712 drives the sliding tube 713, the rectangular housing 714 and parts thereon to start moving rightward, the gas on the right side of the first piston disc 712 in the first air storage housing 705 is discharged through the through hole of the first air storage housing 705, when the balls on the sliding rod 716 contact with the inner wall of the sleeve 101, the air pump 706 continues to fill the second air storage housing 707 with gas, the pressure sensor 708 detects the pressure in the second air storage housing 707, and when the data detected by the pressure sensor 708 reaches the measured pressure (when the pressure in the second air storage housing 707 reaches the friction force when the second piston disc 717 slides relative to the third air storage housing 715, due to the limitation of the sleeve 101 to the balls on the sliding rod 716), so that the slide bar 716 cannot move rightward), the control terminal stops the air pump 706, and the positioning mechanism is adjusted to the measurement state.

After the positioning mechanism is adjusted to a measurement state, an operator starts the positioning mechanism to detect the position of the hole 102, the position of the hole 102 is shown only for illustration, the position of the hole 102 is not the true position of the hole 102, the hole 102 is distributed at any position of the horizontal plane where the position of the sleeve 101 is shown, the control terminal starts the servo motor 701, the servo motor 701 drives the rotating sleeve 703 to rotate through the first gear 702 and the second gear 704, the rotating sleeve 703 drives the first gas storage shell 705 and parts thereon to rotate with the sliding rod 716, the balls on the sliding rod 716 cling to the inner wall of the sleeve 101 and rotate, the balls on the sliding rod 716 reduce friction between the sliding rod 716 and the sleeve 101 when rotating, the inner wall of the sleeve 101 is prevented from being worn when the sliding rod 716 rotates, the sliding rod 716 is vertically arranged, and therefore the vertically arranged sliding rod 716 sweeps the inner wall of the sleeve 101 in a range during the rotation process, when a row of sliding rods 716 rotates to the vicinity of the hole 102, the sliding rods 716 closest to the hole 102 gradually extend into the hole 102 along with the rotation of the sliding rods 716, the second piston disc 717 drives the sliding rods 716 to drive the sliding rods 716 to approach the hole 102, gas on the right side of the second piston disc 717 in the third gas storage shell 715 is discharged through the through hole of the third gas storage shell 715, at the moment, the inner volume of the third gas storage shell 715 is increased and the pressure is reduced due to the movement of the second piston disc 717, so that the pressure sensor 708 detects the pressure reduction of the second gas storage shell 707, when the pressure data detected by the pressure sensor 708 suddenly reduces, the control terminal stops the servo motor 701, the sliding rods 716 aligned with the hole 102 are in an extending state, and the rest sliding rods 716 keep an initial state.

Subsequently, the control terminal activates the air pump 706 to pump out the air in the second air storage housing 707, the pressure in the second air storage housing 707 decreases from the pressure when the second piston disc 717 slides relative to the third air storage housing 715 to the pressure when the second piston disc 717 cannot slide relative to the third air storage housing 715, the first piston disc 712 drives the sliding tube 713 and the parts thereon to move leftward as the pressure in the second air storage housing 707 decreases, and after the air pump 706 pumps out the air drawn into the second air storage housing 707, the control terminal stops the air pump 706, and the state and position of the row of sliding bars 716 is as shown in fig. 11, the sliding bars 716 that protrude out of the third air storage housing 715 are located right under the limiting grooves 8092, and the position detection of the hole 102 is completed.

After the position of the hole 102 is detected, the hole 102 is plugged by a grouting component, so that the subsequent grouting is facilitated, the electromagnetic valve in the first air guide tube 709 is closed by a control terminal, the electromagnetic valve in the second air guide tube 710 is opened by the control terminal, at the moment, the second air guide tube 710 is communicated with the second air storage shell 707, the control terminal starts the air pump 706 to pump out the air in the second air storage shell 707, the volume of the air in the fourth air storage shell 801 is reduced and the pressure is reduced, the third piston disc 803 drives the limit block 809 and parts on the limit block through the first spline rod 802, the L-shaped rod 804, the second spline rod 805, the sliding sleeve 806 and the U-shaped frame 807, external air enters the air guide tube through the through hole in the fourth air guide tube 801, during the downward movement of the limit block 809, because the upper slide rods 716 do not extend out, the upper slide rods 716 do not block the downward movement of the limit block 809, when the limit block is blocked by the extending slide rods 716, the air in the fourth air storage shell 801, the pressure is reduced and the air guide tube 716 suddenly moves down, the air guide tube 706 is further, the pressure is controlled by the control terminal, the air pump 706 is closed by the air guide tube 706, the air guide tube is further opened by the control terminal, the air guide tube 706 is closed by the control terminal, the air guide tube 706 is opened by the control terminal is suddenly moves down, and the air guide tube 706 is closed by the air guide tube 706, and the air guide tube 706 is closed, and the pressure is suddenly moved down, and the pressure is closed by the control valve is opened, and is opened by the control valve, and is closed by the control terminal, and is opened by the air valve, and is opened and moved down by the air valve, and is opened and is not moved down by the air, when the right side surface of the third air storage shell 715 contacts with the left side surface of the limiting block 809, the upper side of the protruding sliding rod 716 and the right end of the adjacent sliding rod 716 are inserted into the limiting hole 8091, the third air storage shell 715 drives the limiting block 809 and parts on the limiting block to start to move rightwards, the spring 808 is stretched, when the limiting block 809 drives the sealing frame 810 to contact with the inner wall of the sleeve 101, as one side of the sealing frame 810, which is close to the inner wall of the sleeve 101, is set to be an arc surface, the right side surface of the sealing frame 810 is tightly attached to the inner wall of the sleeve 101, meanwhile, the attaching area of the sealing frame 810 and the inner wall of the sleeve 101 is increased, and as the sealing frame 810 is made of high-temperature resistant elastic materials, the sealing frame 810 and the inner wall of the sleeve 101 are extruded to deform, the extrusion force between the sealing frame 810 and the inner wall of the sleeve 101 is increased, the sealing frame 810 and the inner wall of the sleeve 101 is guaranteed to be in a high sealing state, and leakage of molten iron in the subsequent sealing frame 810 is avoided.

After the sealing frame 810 is in sealing fit with the inner wall of the sleeve 101, the sealing frame 810 cannot move to the right any more, the pressure sensor 708 detects that the pressure in the second gas storage shell 707 is gradually increased, the control terminal stops the gas pump 706 and starts one igniter 817 to ignite the adjacent magnesium strip 816, the magnesium strip 816 ignites one part of the thermite reactant adjacent to the inside of the storage shell 812, the material of the connecting disc 813 and the material of the baffle 814 are all heat insulation materials, the rest thermite reactants are prevented from being ignited at high temperature through the storage shell 812, the connecting disc 813 and the baffle 814, the material of the baffle 815 is combustible materials, molten iron generated by high-temperature reaction of the thermite is melted by the adjacent blocking block 815, the molten iron enters the cavity formed by the limiting block 809, the sealing frame 810 and the inner wall of the sleeve 101 through the guide pipe 811, the molten iron is gradually filled in the hole 102, one end of the hole 102 is far away from the molten iron is cooled down, one end of the hole 102 is filled with the thermite, after a period, the hole 102 is filled up, the top of the limiting groove 8092 is flush with the center point of the limiting block is prevented from being aligned with the center point of the limiting block, the center point of the limiting block is aligned with the center point of the sealing frame 810, the center point of the sealing frame is aligned with the inner wall 101, the hole 101 is completely formed by the sealing point of the sealing frame 101, and the hole 101 is completely is filled by the sealing the hole is completely, and the hole 101 is completely filled by the sealing is completely after the sealing the hole is completely sealed by the sealing hole is formed, and the inner wall is completely is sealed by the inner along with the sealing point after the hole sealing space is completely sealed.

Then the control terminal starts the air pump 706 to pump out the air in the second air storage shell 707, the pressure in the second air storage shell 707 is reduced, the first piston disc 712 drives the rectangular shell 714, the third air storage shell 715 and parts thereon to move leftwards through the sliding tube 713, the spring 808 is reset, the left side face of the limiting block 809 is clung to the right side face of the third air storage shell 715 to move leftwards, when the first piston disc 712 contacts with the limiting ring, the air pressure in the second air storage shell 707 is reduced, the detected sliding rod 716 starts to move leftwards and reset, after the sliding rod 716 resets, the control terminal stops the air pump 706, the control terminal closes the electromagnetic valve in the first air guide tube 709 and opens the electromagnetic valve in the second air guide tube 710, the control terminal starts the air pump 706 to charge air into the second air storage shell 707, the third piston disc 803 starts to move upwards, the limiting block 809 moves upwards and resets, and after the resetting is completed, the control terminal closes the electromagnetic valve in the second air guide tube 710 and opens the electromagnetic valve in the third air guide tube 902.

Example 2

On the basis of embodiment 1, as shown in fig. 12, the polishing mechanism comprises a fifth gas storage shell 901, the fifth gas storage shell 901 is welded on a rotating sleeve 703, an included angle is formed between the fifth gas storage shell 901 and the first gas storage shell 705, the fifth gas storage shell 901 and the first gas storage shell 705 are located at a uniform height, a third gas guide pipe 902 is communicated between the fifth gas storage shell 901 and the second gas storage shell 707, gas in the second gas storage shell 707 enters the fifth gas storage shell 901 through the third gas guide pipe 902, an electromagnetic valve electrically connected with a control terminal is arranged in the third gas guide pipe 902, a third spline rod 903 is slidingly connected to the left side of the fifth gas storage shell 901, a fourth piston disc 904 welded with the third spline rod 903 is slidingly connected to the left side of the fifth gas storage shell 901, a through hole is formed in the left side face of the fifth gas storage shell 901, a connecting frame 905 is fixedly connected to the left end of the third spline rod 903 in a rotating manner, a polishing shell 906 for polishing the inner wall of the sleeve 101 is arranged on the outer side face of the electric drum 906, the polishing shell polishes redundant thermic products, the connecting frame 905 is rotationally connected with polishing rollers 907 symmetrically distributed, and the polishing quality of the polishing shell is guaranteed to be equal to the outer diameter of the polishing shell 101 only, and the polishing quality of the polishing roller 101 is guaranteed.

After the hole 102 is filled, the excessive aluminothermic reaction product on the inner wall of the sleeve 101 is polished, the specific operation is as follows, the control terminal starts the servo motor 701, the rotating sleeve 703 drives the fifth gas storage shell 901 and parts thereon to rotate, when the fifth gas storage shell 901 rotates by a certain angle (the included angle between the fifth gas storage shell 901 and the first gas storage shell 705), the control terminal stops the servo motor 701, the fifth gas storage shell 901 is positioned at the position of the first gas storage shell 705 in the detection state, the electric roller 906 is aligned with the hole 102, then the control terminal starts the air pump 706 to fill air into the second gas storage shell 707, the air in the second gas storage shell 707 enters the fifth gas storage shell 901 through the third air duct 902, the pressure in the fifth gas storage shell 901 is increased, the fourth piston disc 904 drives the electric roller 906 and the two limiting rollers 907 to be close to the hole 102 through the third spline rod 903 and the connecting frame 905, the gas at the left side of the fourth piston disc 904 in the fifth gas storage shell 901 is discharged through the through hole of the fifth gas storage shell 901, meanwhile, the control terminal starts the electric roller 906 to rotate, the control terminal starts the servo motor 701 to periodically rotate forward and backward, the electric roller 906 swings, when the polishing shell on the outer side surface of the electric roller 906 contacts with the thermite reaction product, the polishing shell polishes the inner wall of the sleeve 101, in the process of polishing the inner wall of the sleeve 101, as the outer diameter of the limiting roller 907 is equal to the outer diameter of the polishing shell, the polishing shell only polishes redundant thermite products on the sleeve 101 to ensure the integrity of the inner wall of the sleeve 101 after polishing is finished, the control terminal stops the electric roller 906 after the polishing of the inner wall of the sleeve 101, the control terminal starts the air pump 706 to pump out the gas in the second gas storage shell 707, when the motorized pulley 906 is reset, the control terminal stops the air pump 706 and the servo motor 701, and the filling and polishing of one hole 102 is completed.

When the holes 102 with the same height are required to be filled and polished, an operator does not need to remove the plugging assembly, and continues to repeat the upper steps to fill and polish the rest of the holes 102, when the holes 102 with other heights are required to be filled and polished, the operator removes the plugging assembly, and specifically, the method is operated as follows, the operator releases the pressure in the fixed rod 1, the second tension spring 1004 drives the push plate 1003 to move downwards, the push plate 1003 moves downwards to enable the protective sand on the push plate 1003 to reenter the upper side of the push plate 1003 in the plugging housing 1001, as the upper side diameter of the plugging ring 1005 is larger than the lower side diameter of the intercepting ring 1005, the protective sand on the upper side of the intercepting ring 1005 is completely backfilled along the inner side surface of the intercepting ring 1005, after the protective sand on the intercepting ring 1005 is removed, gaps are reserved between the intercepting ring 1005 and the inner wall of the sleeve 101 again, so that the repairing device moves up and down in the sleeve 101, after the push plate 1003 is reset, the pressure in the air bag 1002 starts to decrease along with the decrease of the pressure in the fixed rod 1, after the push plate 1003 loses contact with the inner wall of the sleeve 101 and is reset, the operator stops releasing the pressure, the pressure in the fixed rod 1 is reset, the operator moves to the other holes 102 after the step is repeated, and the repairing device is completed, and the holes 102 are repaired by the operator is completed after the repairing steps are completed, and the hole 102 is finished by repeating the steps.

In summary, through the accurate positioning to hole 102 to with slip casting subassembly and hole 102 alignment, reduce the use amount of thermite reactant, be convenient for follow-up casing to the polishing of sleeve pipe 101 inner wall, and this prosthetic devices once put into the pit, fill a plurality of holes 102, avoid frequently going into this prosthetic devices down, reduce the loaded down with trivial details degree to hole 102 filling process, be convenient for operating personnel use.

While the disclosure has been described with respect to only a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that various other embodiments can be devised which do not depart from the scope of the invention as disclosed herein. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims (9)

1. The utility model provides a prosthetic devices for damaged oil casing in pit, including dead lever (1), characterized by, dead lever (1) is provided with control terminal, dead lever (1) is provided with baffle disc (2) of symmetric distribution, be provided with sleeve pipe (101) in the oil well, sleeve pipe (101) are provided with hole (102), keep away from baffle disc (2) and dead lever (1) rigid coupling of sleeve pipe (101) mouth one side, baffle disc (2) and dead lever (1) sliding connection near sleeve pipe (101) mouth one side, rigid coupling has first extension spring (3) between baffle disc (2) of symmetric distribution, the connecting rod (4) of equidistant distribution of circumference all hinges between upper and lower adjacent connecting rod (4) have braced frame (5), the guide wheel (6) of symmetric distribution are connected with in the braced frame (5) rotation, dead lever (1) are provided with the positioning mechanism that is used for detecting the position of sleeve pipe (101), positioning mechanism is located the right side of dead lever (1) lower part, be provided with the slip casting subassembly that is used for shutoff hole (102) on the positioning mechanism; the fixing rod (1) is provided with a blocking component for blocking the sleeve (101), the blocking component is located at the lower end of the fixing rod (1), the blocking component comprises a blocking shell (1001), the blocking shell (1001) is fixedly connected to the lower end of the fixing rod (1), an air bag (1002) is fixedly connected to the blocking shell (1001), the blocking shell (1001) is provided with an air vent communicated with the air bag (1002), a pushing disc (1003) which is in sliding connection with the fixing rod (1) is slidably connected to the blocking shell (1001), protective sand located at the upper side of the pushing disc (1003) is filled in the blocking shell (1001), a second tension spring (1004) is fixedly connected between the pushing disc (1003) and the blocking shell (1001), the fixing rod (1) is arranged as a hollow rod with the lower end blocked, the air inlet of the fixing rod (1) is provided with an air inlet hole, and the air inlet of the fixing rod (1) is located at the lower side of the pushing disc (1003). The elastic force of the first tension spring (3) enables the central axis of the fixing rod (1) to coincide with the central axis of the sleeve (101) through the supporting frame (5), the connecting rod (4) and the baffle disc (2).

2. The repairing device for the damage of the underground petroleum casing according to claim 1, wherein the positioning mechanism comprises a servo motor (701) electrically connected with the control terminal, the servo motor (701) is fixedly connected with a fixed rod (1), an output shaft of the servo motor (701) is fixedly connected with a first gear (702), the fixed rod (1) is rotationally connected with a rotating sleeve (703) positioned at the lower side of a baffle plate (2), the rotating sleeve (703) is fixedly connected with a second gear (704) meshed with the first gear (702), the rotating sleeve (703) is fixedly connected with a first gas storage shell (705), the first gas storage shell (705) is positioned at the right side of the rotating sleeve (703), the first gas storage shell (705) is fixedly connected with an air pump (706) electrically connected with the control terminal, the air pump (706) is communicated with a second gas storage shell (707), a pressure sensor (708) electrically connected with the control terminal is fixedly connected in the second gas storage shell (707), a first gas guide pipe (709) and a second gas guide pipe (710) are communicated between the first gas storage shell (705) and the second gas storage shell (710), the first gas guide pipe (709) and the second gas guide pipe (710) are fixedly connected with the first gas guide pipe (703) and the second gas guide pipe (710) are respectively provided with a detection component (101) and the polishing component (101) is arranged at the position of the polishing terminal, the first gas storage housing (705) is provided with an adjustment mechanism for positioning the holes (102).

3. The repairing device for underground petroleum casing damage according to claim 2, wherein the detecting component comprises a plugging plate (711), the plugging plate (711) is fixedly connected in the first gas storage shell (705), a first piston disc (712) is slidingly connected to one side of the first gas storage shell (705) far away from the rotating sleeve (703), a limiting ring for limiting the first piston disc (712) is fixedly connected in the first gas storage shell (705), the plugging plate (711), the first piston disc (712) and the first gas storage shell (705) are matched to form a first cavity (7051), one side of the plugging plate (711) far away from the first piston disc (712) is matched with the first gas storage shell (705) to form a second cavity (7052), one side of the first gas storage shell (705) far away from the plugging plate (711) is provided with a through hole, a sliding tube (713) fixedly connected with the first piston disc (712) in a limiting sliding manner, the sliding tube (713) is communicated with the first cavity (7051), the sliding tube (713) is communicated with a rectangular shell (714), third sliding rods (714) are distributed in the third gas storage shells (716) which are uniformly distributed and are fixedly connected with the third gas storage shells (715) which are fixedly connected with the third gas storage shells (716), one end of the sliding rod (716) far away from the second piston disc (717) is rotationally connected with a ball, and the friction force between the second piston disc (717) and the third air storage shell (715) is larger than that between the first piston disc (712) and the first air storage shell (705).

4. A repairing device for damage of an underground petroleum casing according to claim 3, wherein the adjusting mechanism comprises a fourth gas storage shell (801), the fourth gas storage shell (801) is fixedly connected to the first gas storage shell (705) and is communicated with the second cavity (7052), the fourth gas storage shell (801) is slidably connected with a first spline rod (802), a third piston disc (803) fixedly connected with the first spline rod (802) is slidably connected in the fourth gas storage shell (801), a through hole is formed in one end, far away from the first gas storage shell (705), of the fourth gas storage shell (801), an L-shaped rod (804) is fixedly connected to one end, far away from the fourth gas storage shell (801), of the first spline rod (802), a second spline rod (805) is fixedly connected to the L-shaped rod (804), a sliding sleeve (806) is slidably connected to the second spline rod (805), a U-shaped frame (807) is fixedly connected between the U-shaped frame (807) and the second spline rod (805).

5. The repairing device for underground petroleum casing damage according to claim 4, wherein the grouting assembly comprises a limiting block (809), the limiting block (809) is fixedly connected to the U-shaped frame (807), the limiting block (809) is provided with a limiting hole (8091) and a limiting groove (8092), the limiting groove (8092) is positioned at the lower side of the limiting hole (8091), the distance between the limiting hole (8091) and the limiting groove (8092) is equal to the distance between two adjacent sliding rods (716), the diameter of the limiting hole (8091) is equal to the diameter of the sliding rods (716), one side of the limiting block (809) close to the casing (101) is fixedly connected with a sealing frame (810), the limiting block (809) is embedded with a guide pipe (811), the guide pipe (811) is communicated with a storage shell (812), symmetrically distributed connecting discs (813) are fixedly connected in the storage shell (812), circumferentially equidistant baffle plates (814) are fixedly connected between the symmetrically distributed connecting discs (813), the storage shell (812), the material of the limiting block (813) and the baffle plates (814) are made of heat insulating materials, the circumferentially distributed connecting blocks (815) are circumferentially distributed on one side of the limiting block (809), baffle (814) that circumference equidistant distributes are crisscross with baffle (815) that circumference distributes, connection pad (813) that keep away from stopper (809) are provided with circumference distribution's chucking hole, all install magnesium strip (816) in the chucking hole that connection pad (813) circumference distributes, circumference equidistant distributed baffle (814) are crisscross with magnesium strip (816) that circumference distributes distribute, the intussuseption of storage casing (812) is filled with thermite reactant, connection pad (813) that keep away from stopper (809) are provided with circumference distribution's some firearm (817), circumference distribution's some firearm (817) contact with adjacent magnesium strip (816) respectively.

6. The repairing device for underground petroleum casing damage according to claim 5, wherein one side of the sealing frame (810) close to the inner wall of the casing (101) is provided with an arc surface for increasing the contact area between the sealing frame (810) and the inner wall of the casing (101), and the sealing frame (810) is made of high-temperature resistant elastic material for increasing the tightness between the sealing frame (810) and the casing (101).

7. A repair device for a damaged casing of a downhole petroleum according to claim 5, wherein the top of the limit groove (8092) is level with the centre point of the limit block (809) for filling the hole (102).

8. The repairing device for the damage of the underground petroleum casing according to claim 2, wherein the polishing mechanism comprises a fifth gas storage shell (901), the fifth gas storage shell (901) is fixedly connected to a rotating sleeve (703), an included angle is reserved between the fifth gas storage shell (901) and the first gas storage shell (705), a third gas guide pipe (902) is communicated between the fifth gas storage shell (901) and a second gas storage shell (707), an electromagnetic valve electrically connected with a control terminal is arranged in the third gas guide pipe (902), the fifth gas storage shell (901) is slidably connected with a third spline rod (903), a fourth piston disc (904) fixedly connected with the third spline rod (903) is slidably connected in the fifth gas storage shell (901), a through hole is formed in one side, far away from the rotating sleeve (703), of the fifth spline rod (901), a connecting frame (905) is fixedly connected to one end, far away from the fourth piston disc (904), of the connecting frame (905) is rotatably connected with an electric roller (905) electrically connected with the control terminal, a polishing surface (903) is provided with a third spline rod (903), and the outer diameter of the polishing roller (907) is symmetrically connected with the outer diameter of the polishing shell (907), and the outer diameter of the polishing shell (906) is limited by the polishing surface is equal.

9. The repairing device for underground petroleum casing damage according to claim 1, wherein the plugging shell (1001) is fixedly connected with an interception ring (1005), the interception ring (1005) is provided with an inclined surface, the upper side diameter of the interception ring (1005) is larger than the lower side diameter of the interception ring, a gap exists between the diameter of the outer side surface of the interception ring (1005) and the inner wall of the casing (101), and the interception ring (1005) is made of an elastic material and is used for intercepting protective sand.

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