Quick dismounting device for drilling construction casing pipe

Abstract

The invention relates to the technical field of drilling construction, in particular to a drilling construction sleeve quick dismounting device which comprises a supporting arc panel, a supporting mounting frame is arranged in the middle of one side of the supporting arc panel, two rotating arc panels are symmetrically arranged on the other side of the supporting arc panel, and the drilling construction sleeve quick dismounting device further comprises two strength maintaining modules; the flushing mechanism is arranged on the inner side of the rotating cambered surface plate and comprises two groups of uniform flushing modules symmetrically arranged on the inner side of the rotating cambered surface plate; and the reverse dismounting mechanism is arranged on the inner side of the rotating cambered surface plate and comprises dismounting modules symmetrically arranged on the inner side of the rotating cambered surface plate between the uniform flushing modules. Through an openable rotating cambered surface plate and an integrated high-pressure flushing mechanism, continuous operation of rapid clamping and'cleaning-dismounting 'is realized, and through a strength maintaining module and a multi-point self-adaptive driving design, uniform and strong two-way rotary unloading force can be applied, dirt can be effectively removed, slipping is prevented, a sleeve is protected, and the service life of the sleeve is prolonged. And the dismounting efficiency, the reliability and the operation safety are obviously improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling construction, and particularly relates to a quick dismounting device for casing in drilling construction. BACKGROUND

[0002] In the field of drilling engineering such as oil, natural gas, mineral exploration and hydrogeology, casing is a key structure for wall protection, collapse prevention and complex strata isolation. Its running and pulling are routine and crucial links in the construction process. However, the threaded connection of the casing which has been in service for a long time in the complex underground environment is easily bonded by dense silt, gravel, cement slurry or corrosion products. Combined with the non-uniform stratum pressure that may be borne, the dismounting operation is extremely difficult, which becomes one of the main bottlenecks affecting the construction efficiency, cost and even safety.

[0003] At present, the dismounting of the casing with serious corrosion and adhesion in the field still highly depends on the combination of traditional manual operation and simple machinery. The mainstream methods include using large chain tongs, hydraulic tongs combined with manual knocking and vibration, or using hoists, tractors and other equipment for forced pulling. These methods have significant limitations: first, the operation efficiency is low and the preparation is complicated. The clamping process is time-consuming and laborious, especially for the casing which is still in the wellhead construction, the operation space is limited, the tool is difficult to be in place, and the cleaning and dismounting are carried out in steps, the process connection is not coherent, and the whole process is time-consuming. Second, the dismounting reliability is poor and the success rate is difficult to guarantee. The traditional method often ignores or cannot effectively pretreat the stubborn dirt at the casing coupling, and the torque is directly applied, which is easy to slip, not only may damage the tool teeth, but also cannot transmit enough dismounting torque, resulting in dismounting failure. Third, the casing body and thread are easily damaged. The hard clamping of chain tongs or hydraulic tongs may crush the casing or damage its outer wall; uneven stress or excessive impact force easily leads to thread deformation or even tearing, causing the casing to be scrapped and causing huge economic losses. Fourth, the degree of automation is low and the safety risk is high. The operation process needs close cooperation of multiple people, involving heavy lifting, high-intensity knocking, sudden release of energy of equipment, etc., and the personnel face high risks of object impact and mechanical injury, with high labor intensity. Fifth, the adaptability is insufficient. The clamping adaptability of the traditional tool for casings with different diameters and different corrosion states is limited, and lacks targeted cleaning function, which is often helpless in extreme working conditions.

[0004] Although some hydraulic or pneumatic dismounting tools aiming to improve the dismounting efficiency appear in the prior art, they mostly have single function, usually only focus on the "dismounting" action itself, lack the organic combination with the "pretreatment" link, and the overall rigidity and anti-uniform load capacity of the structure need to be strengthened, which still feels inadequate when dealing with large and heavily adhered casings.

[0005] The present application aims to solve the technical problems in the prior art, and provides a drilling construction casing quick dismounting device. SUMMARY

[0006] The present application aims to solve the technical problems in the prior art, and provides a drilling construction casing quick dismounting device.

[0007] The present application has the following beneficial effects:

[0008] The present application provides a drilling construction casing quick dismounting device, which comprises a support arc panel, a support mounting frame is arranged at the middle of one side of the support arc panel, a support drive column is rotatably arranged on the support mounting frame, a swing mounting column is arranged on the support drive column, a fixed mounting plate is arranged at the outer end of the swing mounting column, a plurality of fixed mounting holes are arranged on the fixed mounting plate, two rotating arc panels are symmetrically arranged at the other side of the support arc panel, connecting shafts are symmetrically arranged at the two ends of the support arc panel, rotating installation cylinders are rotatably arranged at one end of the rotating arc panels in cooperation with the connecting shafts, and butt joint columns are arranged at the other end of the rotating arc panels and connected through a plurality of rotating buckles.

[0009] The flushing mechanism is arranged at the inner side of the rotating arc panel and comprises two groups of uniform flushing modules symmetrically arranged at the inner side of the rotating arc panel.

[0010] The reverse dismounting mechanism is arranged at the inner side of the rotating arc panel and comprises dismounting modules symmetrically arranged at the inner side of the rotating arc panel between the uniform flushing modules.

[0011] As a further scheme of the present application, the two groups of strength maintaining modules are respectively arranged at the outer side of the rotating arc panel, a plurality of arc surface reinforcing strips are horizontally arranged at equal intervals at the outer side of the rotating arc panel, a plurality of combined mounting blocks are arranged at equal angles at the outer side of the arc surface reinforcing strips, elastic arc panels are arranged between the combined mounting blocks, combined mounting holes are arranged through the elastic arc panels opposite to the combined mounting blocks, positioning mounting holes are arranged through the combined mounting blocks opposite to the combined mounting holes, combined mounting columns are arranged through the positioning mounting holes and the combined mounting holes, external threads are arranged at the two ends of the combined mounting columns, and nuts are arranged in cooperation with the external threads.

[0012] As a further scheme of the present application, the uniform flushing module comprises an arc-shaped flow guide cylinder arranged at the inner side of the rotating arc panel, an arc-shaped rubber flow guide plate is arranged at the outer side of the arc-shaped flow guide cylinder, a plurality of jet holes are arranged at equal angles in the arc-shaped rubber flow guide plate, and the jet holes are in communication with the arc-shaped flow guide cylinder.

[0013] As a further scheme of the present application: the arc-shaped guide cylinder is provided with a liquid supply conduit, the liquid supply conduit extends from the outer side of the rotating arc panel, and a booster pump is arranged in series on the liquid supply conduit.

[0014] As a further scheme of the present application: the arc-shaped limiting guide cylinder is arranged on the inner side of the rotating arc panel, an arc-shaped limiting guide column is arranged in cooperation with the arc-shaped limiting guide cylinder, a plurality of transmission mounting columns are arranged at equal angles on the part of the arc-shaped limiting guide column extending out of the arc-shaped limiting guide cylinder, a deflection driving column is arranged at the outer end of each transmission mounting column, a deflection mounting bracket is rotatably arranged on the deflection driving column, a deflection telescopic column is arranged on the deflection mounting bracket, and an abutting arc panel is rotatably arranged at the outer end of the deflection telescopic column.

[0015] As a further scheme of the present application: the inner side of the abutting arc panel is covered with a rubber layer, a plurality of abutting occlusal teeth are arranged at equal angles in the rubber layer, and the outer end of each abutting occlusal tooth extends out of the rubber layer.

[0016] As a further scheme of the present application: a transmission mounting bracket is rotatably arranged at one end of the arc-shaped limiting guide column close to the supporting arc panel, a driving telescopic column is arranged on the transmission mounting bracket, a driving mounting bracket is arranged at the end of the driving telescopic column through a driving rotating column, and the driving mounting bracket is fixed on the supporting arc panel.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] I. Significantly improve the disassembly efficiency and operation convenience

[0019] The device adopts a rotatable arc panel design that can be opened and closed, which can quickly sleeve or wrap the drilling casing, is suitable for various operation scenes during construction and after shutdown, and greatly shortens the clamping and preparation time.

[0020] Through the integrated flushing and disassembly mechanism, continuous automatic operation of "cleaning-disassembly" is realized, manual intervention and process conversion time are reduced, and the device is especially suitable for drilling sites in the wild or complex working conditions.

[0021] II. Effectively ensure the reliability of the disassembly operation

[0022] Pre-cleaning function: a high-pressure flushing mechanism is arranged to completely remove the dirt, gravel and other attachments on the surface of the casing, avoid slipping, tight occlusion or damage to the disassembly structure caused by impurities, and ensure the effective transmission of the disassembly action from the root.

[0023] Strengthen the structure design: through the arc reinforcing strip, the elastic arc panel and the combined mounting structure, the overall rigidity and anti-deformation ability of the rotating arc panel are significantly enhanced, the device can withstand greater disassembly torque, the service life is prolonged, and the ability to be applicable to casings of different specifications and corrosion degrees is expanded.

[0024] III. Provide stable and adjustable clamping and driving force

[0025] The disassembly module adopts a multi-point driving mode with symmetrical layout. The movement of the arc-shaped limiting guide column is controlled by the driving telescopic column, which can simultaneously apply bidirectional rotating force to the casing, and the stress is uniform, avoiding damage to the casing or disassembly failure caused by unbalanced load.

[0026] The abutting arc panel is equipped with a rubber layer and abutting occlusal teeth, which not only increases the friction with the surface of the casing, but also adapts to the uneven surface of the casing. At the same time, the rubber layer plays a buffering protection role to prevent damage to the casing surface by hard contact.

[0027] The deflection telescopic column and the angle-adjustable deflection mounting bracket enable the abutting arc panel to self-adapt to casings of different diameters and optimize the occlusal angle, ensuring effective torque transmission.

[0028] IV. Enhance environmental adaptability and functional expansibility

[0029] The jet angle of the arc-shaped rubber guide plate of the flushing mechanism is adjustable, which can target cleaning according to different pipe diameters and dirt distribution, improving cleaning effect and water resource utilization efficiency.

[0030] The device can be flexibly installed on an external frame or a mobile device through the fixed mounting plate, facilitating on-site deployment and position adjustment, and improving the flexibility of the overall operation.

[0031] V. Improve operation safety

[0032] Mechanization and modularization of operation reduce high-risk operations such as direct knocking and prying, and reduce labor intensity and personal injury risk.

[0033] The strength maintaining module and the stable clamping structure work together to prevent sudden failure of the device or splashing of parts during high-pressure disassembly, improving overall operation safety. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0035] Figure 1 It is a bottom side view of a kind of drilling construction casing quick disassembly device.

[0036] Figure 2 It is a top side view of a kind of drilling construction casing quick disassembly device.

[0037] Figure 3 is a zoomed-in view of a portion of Figure 2

[0038] Figure 4 is a perspective view of an elastic arc panel in a drilling construction casing quick dismounting device.

[0039] Figure 5 is a perspective view of a rotating arc panel in a drilling construction casing quick dismounting device.

[0040] Figure 6 is a semi-perspective view of a rotating arc panel in a drilling construction casing quick dismounting device.

[0041] Figure 7 is a zoomed-in view of a portion of Figure 6

[0042] Figure 8 is a perspective view of a reverse dismounting mechanism in a drilling construction casing quick dismounting device.

[0043] Figure 9 is a perspective view of a dismounting module in a drilling construction casing quick dismounting device.

[0044] Figure 10 is a partial perspective view of an abutting arc panel in a drilling construction casing quick dismounting device.

[0045] 1 - support arc panel, 2 - rotating arc panel, 3 - support mounting frame, 4 - butt joint mounting column, 5 - rotating buckle, 6 - support driving column, 7 - swing mounting column, 8 - fixed mounting plate, 9 - rotating mounting cylinder, 10 - arc-shaped flow guide cylinder, 11 - arc-shaped limiting guide cylinder, 12 - abutting arc panel, 13 - arc surface reinforcing strip, 14 - combined mounting block, 15 - elastic arc panel, 16 - combined mounting column, 17 - nut, 18 - connecting rotating shaft, 19 - driving mounting frame, 20 - driving telescopic column, 21 - arc-shaped limiting guide column, 22 - deflection telescopic column, 23 - driving rotating column, 24 - transmission mounting column, 25 - deflection driving column, 26 - arc-shaped rubber flow guide plate, 27 - booster pump, 28 - jet hole, 29 - deflection mounting frame, 30 - abutting engagement tooth, 31 - rubber layer, 32 - positioning mounting hole, 33 - external thread, 34 - combined mounting hole, 35 - liquid supply conduit, 36 - transmission mounting frame. DETAILED DESCRIPTION

[0046] ​​Embodiments of the present application are described below in detail with reference to the drawings, in which like or similar elements or components each having the same or similar function are designated by the same reference numerals throughout the drawings. The embodiments described below are exemplary and are intended to explain the present application, and are not to be understood as limiting the present application.

[0047] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplicity, the elements and settings of the specific examples below are described in some detail. Of course, they are merely examples and are intended to teach a broadest possible interpretation of the present application. In addition, the present application can refer to a number of different examples throughout the following disclosure. Such repetition is for the sake of simplicity and clarity and is not to be interpreted as a limitation of the various embodiments and / or settings discussed.

[0048] Embodiment one, please refer to Figures 1-2 In the embodiment of the present application, a quick dismounting device for drilling construction casing pipe comprises a supporting arc panel 1, a supporting mounting frame 3 is arranged at the middle position of one side of the supporting arc panel 1, a supporting drive column 6 is rotatably arranged on the supporting mounting frame 3, a swing mounting column 7 is arranged on the supporting drive column 6, a fixed mounting plate 8 is arranged at the outer end of the swing mounting column 7, a plurality of fixed mounting holes are arranged on the fixed mounting plate 8, two rotating arc panels 2 are symmetrically arranged at the other side of the supporting arc panel 1, a connecting rotating shaft 18 is symmetrically arranged at the two ends of the supporting arc panel 1, a rotating installation cylinder 9 is rotatably arranged on one end of the rotating arc panel 2 in cooperation with the connecting rotating shaft 18, a butt joint column 4 is arranged at the other end of the rotating arc panel 2, the butt joint columns 4 are connected through a plurality of rotating buckles 5, and two groups of strength maintaining modules are further included.

[0049] The flushing mechanism is arranged at the inner side of the rotating arc panel 2 and comprises two groups of uniform flushing modules symmetrically arranged at the inner side of the rotating arc panel 2.

[0050] The reverse dismounting mechanism is arranged at the inner side of the rotating arc panel 2 and comprises a dismounting module symmetrically arranged at the inner side of the rotating arc panel 2 between the uniform flushing modules.

[0051] The swing mounting column 7 is fixed on the frame arranged outside through the fixed mounting plate 8 and the plurality of fixed mounting holes thereon, or is mounted on the mobile device arranged outside, so that the device is sleeved on the drilling casing pipe;

[0052] If the device needs to be operated during the drilling construction, the rotating buckle 5 is opened, the rotating arc panel 2 is rotated to open around the connecting rotating shaft 18, the drilling casing pipe under construction is arranged in the device, then the rotating arc panel 2 is rotated to make the butt joint columns 4 contact, at this time the rotating buckle 5 is rotated to lock the two butt joint columns 4; if the drilling construction is not in progress, the drilling casing pipe is inserted into the device for dismounting operation;

[0053] Specifically, the drilling casing is first flushed by a uniform flushing module to remove sand and mud, ensuring the smooth disassembly process and preventing slippage or even disassembly failure.

[0054] After flushing is completed, the symmetrical disassembly module is controlled to reverse drive, and finally the drilling casing is disassembled.

[0055] Example 2, based on Example 1, please refer to... Figures 1-7 In this embodiment of the invention, two sets of strength-maintaining modules are respectively arranged on the outer side of the rotating arc panel 2, including several arc-shaped reinforcing strips 13 arranged horizontally at equal intervals on the outer side of the rotating arc panel 2, several combined mounting blocks 14 arranged at equal angles on the outer side of the arc-shaped reinforcing strips 13, and an elastic arc panel 15 arranged between the combined mounting blocks 14. A combined mounting hole 34 is provided through the elastic arc panel 15 directly opposite the combined mounting block 14, and a positioning mounting hole 32 is also provided through the combined mounting block 14 directly opposite the combined mounting hole 34. A combined mounting post 16 is provided through both the positioning mounting hole 32 and the combined mounting hole 34. Both ends of the combined mounting post 16 are provided with external threads 33, and nuts 17 are provided with the external threads 33.

[0056] Place the elastic arc panel 15 between the combined mounting blocks 14 and align the combined mounting hole 34 with the positioning mounting hole 32. Then insert the combined mounting post 16 and tighten the nuts 17 with the external threads 33 at both ends to fix the elastic arc panel 15. The arc reinforcing strip 13 significantly improves the structural strength of the rotating arc panel 2, increases the bearing torque limit during disassembly, and expands the applicability of the device disassembly.

[0057] The uniform flushing module includes an arc-shaped guide tube 10 disposed on the inner side of the rotating arc panel 2, an arc-shaped rubber guide plate 26 disposed on the outer side of the arc-shaped guide tube 10, and a plurality of jet holes 28 disposed at equal angles inside the arc-shaped rubber guide plate 26, all of which are connected to the inside of the arc-shaped guide tube 10.

[0058] Each of the arc-shaped guide tubes 10 is connected to a liquid supply conduit 35, which extends out from the outside of the rotating arc panel 2, and each liquid supply conduit 35 is connected in series with a booster pump 27.

[0059] The external cleaning fluid is connected through the liquid supply conduit 35. The external cleaning fluid is pressurized and introduced into the arc-shaped guide tube 10 through the booster pump 27. It is then ejected through the arc-shaped rubber guide plate 26 and the jet hole 28 inside to perform high-pressure flushing on the drilling casing inside the device to remove any mud, sand and other impurities that may be present on it.

[0060] The angle of the arc-shaped rubber guide plate 26 can be pre-adjusted according to the jet angle to accommodate more models of drilling casing.

[0061] Example 3, based on Example 2, please refer to... Figure 1 , Figure 2 , Figures 8-10 In this embodiment of the invention, the disassembly module includes an arc-shaped limiting guide cylinder 11 disposed on the inner side of the rotating arc panel 2, an arc-shaped limiting guide post 21 disposed in conjunction with the arc-shaped limiting guide cylinder 11, a plurality of transmission mounting posts 24 disposed at equal angles on the portion of the arc-shaped limiting guide post 21 extending out of the arc-shaped limiting guide cylinder 11, a deflection drive post 25 disposed at the outer end of each transmission mounting post 24, a deflection mounting frame 29 rotatably disposed on each deflection drive post 25, a deflection telescopic post 22 disposed on the deflection mounting frame 29, an abutting arc panel 12 rotatably disposed at the outer end of the deflection telescopic post 22, a rubber layer 31 covered the inner side of the abutting arc panel 12, a plurality of abutting teeth 30 disposed at equal angles inside the rubber layer 31, and the outer ends of the abutting teeth 30 extending out of the rubber layer 31;

[0062] Each of the arc-shaped limiting guide columns 21 has a transmission mounting bracket 36 rotatably mounted on one end near the supporting arc panel 1. A drive telescopic column 20 is mounted on the transmission mounting bracket 36. The end of the drive telescopic column 20 is mounted on a drive mounting bracket 19 via a drive rotating column 23. The drive mounting bracket 19 is fixed to the supporting arc panel 1.

[0063] By controlling the extension and retraction of the drive telescopic column 20, the movement direction of the arc-shaped limit guide column 21 is adjusted. The drive telescopic column 20 connected to the arc-shaped limit guide column 21 facing each other on the two rotating arc panels 2 is driven in opposite directions, and the drive telescopic column 20 connected to the arc-shaped limit guide column 21 facing each other on the same rotating arc panel 2 is driven in opposite directions.

[0064] When the telescopic column 20 is extended or retracted, the arc-shaped limiting guide column 21 moves inside the arc-shaped limiting guide cylinder 11, and moves together with the abutting arc panel 12 on it, applying rotational force in two directions to the drilling casing to achieve the disassembly of the drilling casing.

[0065] Before the telescopic column 20 is extended or retracted, in coordination with the direction of movement of the arc-shaped limiting guide column 21, the deflection drive column 25 causes the deflection mounting bracket 29 and the deflection telescopic column 22 on it to rotate at a certain angle. At the same time, the length of the deflection telescopic column 22 is adjusted so that the rubber layer 31 and the abutting teeth 30 on the arc panel 12 come into contact with the drilling casing. This further drives the deflection telescopic column 22 so that the abutting teeth 30 abut and engage with the drilling casing. This facilitates the transmission of torque to the drilling casing when the telescopic column 20 is extended or retracted. The rubber layer 31 can raise the force-bearing surface and protect the abutting teeth 30.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A quick-release device for drilling casing, comprising a support arc panel, a support mounting frame disposed at the middle position of one side of the support arc panel, a support drive column rotatably disposed on the support mounting frame, a swing mounting column disposed on the support drive column, a fixed mounting plate disposed at the outer end of the swing mounting column, and a plurality of fixed mounting holes disposed on the fixed mounting plate, characterized in that, Two rotating arc panels are symmetrically arranged on the other side of the supporting arc panel, and the system further includes: Two sets of strength-maintaining modules are respectively located on the outer side of the rotating arc panel; The flushing mechanism is located on the inner side of the rotating arc panel and includes two sets of uniform flushing modules symmetrically arranged on the inner side of the rotating arc panel. The reverse disassembly mechanism is located on the inner side of the rotating arc panel, including disassembly modules symmetrically arranged on the inner side of the rotating arc panel between the uniform flushing modules.

2. The drilling casing quick disassembly device according to claim 1, characterized in that, The supporting arc panel has symmetrical connecting shafts at both ends. One end of the rotating arc panel is fitted with a rotating mounting cylinder that rotatably cooperates with the connecting shaft. The other end of the rotating arc panel is provided with a docking mounting post, and the docking mounting posts are connected by several rotating buckles.

3. The drilling casing quick disassembly device according to claim 1, characterized in that, The strength-maintaining module includes several horizontally arranged arc-shaped reinforcing strips at equal intervals on the outer side of the rotating arc panel. Several combined mounting blocks are arranged at equal angles on the outer side of the arc-shaped reinforcing strips. An elastic arc panel is arranged between the combined mounting blocks. A combined mounting hole is provided through the elastic arc panel directly opposite the combined mounting block. A positioning mounting hole is also provided through the combined mounting block directly opposite the combined mounting hole. A combined mounting post is provided through both the positioning mounting hole and the combined mounting hole. Both ends of the combined mounting post are provided with external threads, and nuts are provided with the external threads.

4. The drilling casing quick disassembly device according to claim 1, characterized in that, The uniform flushing module includes an arc-shaped guide tube disposed on the inner side of a rotating arc panel, an arc-shaped rubber guide plate disposed on the outer side of the arc-shaped guide tube, and a plurality of jet holes disposed at equal angles inside the arc-shaped rubber guide plate, all of which are connected to the inside of the arc-shaped guide tube.

5. A quick disassembly device for drilling casing according to claim 4, characterized in that, Each of the arc-shaped guide tubes is connected to a liquid supply conduit, which extends from the outside of the rotating arc panel, and a booster pump is connected in series on each liquid supply conduit.

6. The drilling casing quick disassembly device according to claim 1, characterized in that, The disassembly module includes an arc-shaped limiting guide cylinder on the inner side of the rotating arc panel, an arc-shaped limiting guide post in conjunction with the arc-shaped limiting guide cylinder, and a number of transmission mounting posts at equal angles on the part of the arc-shaped limiting guide post extending out of the arc-shaped limiting guide cylinder. Each transmission mounting post has a deflection drive post at its outer end, a deflection mounting frame rotatably mounted on each deflection drive post, a deflection telescopic post mounted on the deflection mounting frame, and an abutment arc panel rotatably mounted on the outer end of the deflection telescopic post.

7. A quick disassembly device for drilling casing according to claim 6, characterized in that, The inner side of the abutting arc panel is covered with a rubber layer, and a number of abutting teeth are arranged at equal angles in the rubber layer, with the outer ends of the abutting teeth extending out of the rubber layer.

8. A quick disassembly device for drilling casing according to claim 7, characterized in that, Each of the arc-shaped limiting guide columns has a transmission mounting bracket rotatably mounted on one end near the supporting arc panel. The transmission mounting bracket is equipped with a drive telescopic column, and the end of the drive telescopic column is equipped with a drive mounting bracket via a drive rotating column. The drive mounting bracket is fixed to the supporting arc panel.

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