A fabricated wellbore annulus leakage repair assist device

Abstract

The utility model relates to an assembly type shaft gap leakage repair auxiliary device, which belongs to the technical field of assembly type shaft leakage repair and comprises a main support assembly, an adjusting assembly and a positioning assembly. The main support assembly is connected with the telescopic rod through the bidirectional threaded sleeve to uniformly open the inner wall of the shaft. The arc-shaped support and the puncture piece of the positioning assembly are combined to enhance the stability and provide the drainage function. The adjusting assembly is locked by the driving block locking device. The device adopts the modular design, has the compact structure and is convenient to operate. It can meet the construction requirements in the narrow space and significantly improve the repair efficiency. The application effectively solves the problems of easy falling of the hose and inconvenient operation in the traditional repair mode.

Description

Technical Field

[0001] This utility model relates to the field of municipal repair, specifically a prefabricated auxiliary device for repairing leakage in well shaft gaps. Background Technology

[0002] In practical applications of existing prefabricated manholes in coastal areas, due to the deep underground depth of the manholes and the high water content of the groundwater, gaps may exist at the joints of the manhole casing due to construction or material properties. Groundwater can easily seep into the manhole through these gaps. To ensure the integrity and impermeability of the manhole, a common practice is to use quick-setting mortar to grout and repair the leaking gaps, and install thin pipes in the seepage area to divert the water and reduce the impact of groundwater on the quick-setting mortar layer. After the quick-setting mortar layer has cured... The drainage holes are then repaired one by one. However, during the repair process, in actual construction, the seepage area is filled with a quick-setting mortar layer that forms a barrier layer. The water flow from the capillary tube, which collects the seepage water in the well, causes it to fall off. Therefore, additional support is needed to fix the capillary tube to maintain drainage. The current support mechanism usually adopts a ring-shaped support at the well joint to overcome gravity and support and fix the capillary tube. While the ring support has strong support force, it occupies a lot of space in the well, which restricts the operation of construction personnel and thus affects the repair efficiency and effect.

[0003] Therefore, there is an urgent need for a prefabricated well gap leakage repair auxiliary device that can maintain stable support while reducing the space ratio of the well shaft and facilitating operation by construction personnel. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, this utility model provides an auxiliary device for repairing leaks in wellbore gaps.

[0005] The objective of this utility model can be achieved through the following technical solutions: An auxiliary device for repairing leaks in wellbore gaps includes a main support assembly and a positioning assembly. At least two main support assemblies are symmetrically arranged in the wellbore. Each main support assembly includes a bidirectional threaded sleeve, a spreading assembly, and an adjusting assembly. One end of the spreading assembly is telescopically disposed within the bidirectional threaded sleeve, while the other end abuts against the interior of the wellbore to form a stable support. The adjusting assembly is threaded onto the spreading assembly. The positioning assembly is engaged between the two sets of main support assemblies. The positioning assembly includes a puncture component. The adjusting assembly is used to push the puncture component into the wellbore joint to drain the seepage water.

[0006] The expansion assembly includes a telescopic rod and a fixing block. One end of the telescopic rod is symmetrically disposed on the bidirectional threaded sleeve, and the other end is movably connected to the fixing block. The telescopic rod and the bidirectional threaded sleeve provide opposite synchronous support to the inner wall of the wellbore through their reverse threads.

[0007] The adjustment assembly includes a short threaded section, a drive block, a moving part, and a locking part. The short threaded section is located at one end of the telescopic rod, the drive block is threadedly connected to the short threaded section, the moving part is fixed to one side of the drive block, and the locking part slides on the telescopic rod and is movably connected to the moving part.

[0008] The card slot has several card slots.

[0009] The positioning component also includes an arc-shaped bracket and several sliding blocks. The two ends of the arc-shaped bracket are respectively engaged with the grooves of the locking part, and the several sliding blocks slide on the arc-shaped bracket. The puncture member is adjustablely disposed on the sliding blocks.

[0010] The arc of the arc-shaped support is consistent with the inner arc of the wellbore.

[0011] The puncture member and the sliding block are adjustable via a threaded connection.

[0012] The puncture device is a hollow tube with one end pointed.

[0013] The bidirectional threaded sleeve is connected to the telescopic rod by a symmetrical trapezoidal thread engagement.

[0014] The two ends of the inner arc-shaped bracket can be inserted into the slots of the same group of card slots, or they can be inserted into the same side of the card slots of two groups to achieve quick installation and disassembly.

[0015] The beneficial effects of this utility model are as follows: 1. The design of the bidirectional threaded sleeve and telescopic rod achieves uniform expansion of the inner wall of the wellbore, which maintains strong support and solves the problems of large space occupation and inconvenient operation of the traditional ring expansion mechanism.

[0016] 2. The combined design of the arc-shaped support and the puncture component not only enhances the stability of the device, but also provides an additional drainage function, effectively meeting the drainage needs of quick-setting repair mortar.

[0017] 3. The modular design allows for quick disassembly and replacement of components, adapting to repair needs in different locations without requiring complete dismantling, thus significantly improving construction efficiency.

[0018] 4. The overall structure is compact and easy to operate, and the repair task can be completed smoothly even in the narrow space inside the well, reducing the difficulty of construction and labor costs. Attached Figure Description

[0019] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention in its working state; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a partial cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 4 This is a partial cross-sectional view of the three-dimensional structure of this utility model; Legend: 1. Bidirectional threaded sleeve; 2. Telescopic rod; 3. Fixing block; 4. Locking part; 5. Short threaded section; 6. Driving block; 7. Moving part; 8. Arc-shaped bracket; 9. Sliding block; 10. Puncture part. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0022] This utility model relates to an auxiliary device for repairing leaks in wellbore gaps, and its specific implementation method is described in detail with reference to the accompanying drawings. Figure 1 and Figure 2 As shown, the device includes a main support assembly, an adjustment assembly, and a positioning assembly. The main support assembly consists of at least one bidirectional threaded sleeve 1 and a telescopic rod 2. The adjustment assembly consists of a drive block 6 and a moving part 7. The positioning assembly includes an arc-shaped bracket 8, a sliding block 9, and a puncture element 10. These components are modularly designed for quick disassembly and adjustment, while using metal materials instead of traditional flexible hoses to enhance stability and reduce construction difficulty.

[0023] In practical applications, the bidirectional threaded sleeve 1 is first placed at a suitable position on the inner wall of the wellbore. Two telescopic rods 2 are connected to both ends of the bidirectional threaded sleeve 1 via trapezoidal threads. One end of each telescopic rod 2 has a fixing block 3, on which a locking part 4 is slidably connected. The fixing block 3 and the telescopic rod 2 are connected by a rotating connection, allowing for adaptive support force and ensuring that the fixing block 3 fits tightly against the inner wall surface of the wellbore. The outer surface of the fixing block 3 has anti-slip textures to increase friction with the inner wall of the wellbore and prevent slippage. The locking part 4 has multiple slots for installing the arc-shaped bracket 8. Figure 3 As shown, the bidirectional threaded sleeve 1 achieves synchronous guidance through the reverse thread design. When the bidirectional threaded sleeve 1 is rotated, the telescopic rods 2 move away from each other along the thread direction, driving the fixed block 3 to open the inner wall of the well barrel, thereby forming a stable support state.

[0024] The drive block 6 in the adjusting assembly is threadedly engaged with the telescopic rod 2 via a short threaded section 5. For example... Figure 4 As shown, when the rotating drive block 6 is rotated, it pushes the moving part 7 to move axially along the telescopic rod 2 until it contacts the locking part 4. At this time, the slot on the locking part 4 is locked, keeping the arc-shaped bracket 8 in a stable state; both the end face of the moving part 7 and the contact surface of the locking part 4 are provided with elastic pads, and the pre-tightening force is generated by compressing the elastic pads, which further improves the overall stability of the device.

[0025] The arc-shaped bracket 8 in the positioning assembly is made of high-strength aluminum alloy and is detachably installed in the slot of the locking part 4. After the arc-shaped bracket 8 is close to the inner wall of the well shaft, the position of the puncture piece 10 can be adjusted by the sliding block 9. Figure 2 As shown, the sliding block 9 is slidably connected to the arc-shaped bracket 8. The sliding connection between the sliding block 9 and the arc-shaped bracket 8 adopts a dovetail groove structure to ensure smooth sliding and prevent it from falling off. The puncture member 10 is connected to the sliding block 9 by threads. The puncture member 10 is a hollow metal tube with one end pointed. Its tip has been hardened and has good penetration ability. The tip of the puncture member 10 is inserted into the inner wall of the well to enhance the overall stability and can be used as a drainage channel when necessary.

[0026] In actual construction, the main support assembly is first placed at an appropriate position on the inner wall of the well. By rotating the bidirectional threaded sleeve 1, the telescopic rods 2 are moved away from each other along the thread direction, which drives the fixing block 3 to open the inner wall of the well, forming a stable support state. The angle adaptive design of the fixing block 3 ensures that it can fit tightly against the surface of the inner wall of the well. Next, the arc-shaped bracket 8 is installed in the slot of the locking part 4. By adjusting the drive block 6 in the assembly, the moving part 7 is pushed to move axially along the telescopic rod 2 until it contacts the locking part 4, locking the slot to keep the arc-shaped bracket 8 stable. Subsequently, the position of the puncture part 10 is adjusted by the sliding block 9 so that its tip is inserted into the inner wall of the well to enhance the overall stability and to be used as a drainage channel when necessary. The hollow tube design of the puncture part 10 ensures the drainage effect.

[0027] The entire device is designed with full consideration of the requirements of the complex downhole environment. The connection between the bidirectional threaded sleeve 1 and the telescopic rod 2 is a trapezoidal thread engagement, which has high load-bearing capacity and anti-loosening performance. The curvature of the arc-shaped support 8 can be customized according to the wellbore diameter. Its material is high-strength aluminum alloy, which has the advantages of both lightweight and strength. The end face of the moving part 7 and the contact surface of the locking part 4 are equipped with elastic gaskets. By compressing the elastic gaskets, a pre-tightening force is generated, which further improves the overall stability of the device.

[0028] As can be seen from the above specific embodiments, this utility model provides a prefabricated wellbore gap leakage repair auxiliary device with a compact structure, convenient operation, and strong adaptability. The device achieves rapid disassembly and adjustment through modular design, solving the problems of large space occupation and inconvenient operation associated with traditional annular support mechanisms. The combined design of the arc-shaped support 8 and the puncture component 10 not only enhances the stability of the device but also provides additional drainage function, effectively addressing the drainage needs of quick-setting repair mortar. The modular design allows for rapid disassembly and replacement of each component, adapting to repair needs in different locations without requiring overall dismantling, significantly improving construction efficiency. The hollow tube design of the puncture component 10 ensures drainage effectiveness. The overall structure is compact and easy to operate, enabling successful repair tasks even in confined spaces within the well, reducing construction difficulty and labor costs.

[0029] To enable those skilled in the art to fully understand and implement this utility model, the specific implementation principle of this utility model is further explained below in conjunction with a specific application scenario.

[0030] In the actual construction process of wellbore gap leakage repair, the bidirectional threaded sleeve 1 of the main support component is first placed at an appropriate position on the inner wall of the wellbore. The position of the bidirectional threaded sleeve 1 is adjusted according to the wellbore diameter to ensure that its two ends can be connected to the two telescopic rods 2 via trapezoidal thread engagement. Then, the bidirectional threaded sleeve 1 is rotated, causing its internal reverse thread structure to move the two telescopic rods 2 away from each other along the thread direction. During this process, the fixing block 3 at one end of the telescopic rod 2 gradually expands and contacts the inner wall surface of the wellbore. Because the fixing block 3 and the telescopic rod 2 adopt a rotating connection design, the fixing block 3 can adaptively adjust its angle according to the curved shape of the inner wall of the wellbore, thereby achieving a tight fit. The anti-slip texture on the outer surface of the fixing block 3 increases the friction with the inner wall of the wellbore, preventing slippage of the device under high water pressure and ensuring the stability of the support.

[0031] Next, the arc-shaped bracket 8 is installed into the slot of the locking part 4. At this time, by manually rotating the drive block 6, the short threaded section 5 of the drive block 6 engages with the thread of the telescopic rod 2, pushing the moving part 7 to move axially along the telescopic rod 2 until the moving part 7 contacts the locking part 4. Both the contact surfaces of the moving part 7 and the locking part 4 are provided with elastic gaskets. When the two contact, the elastic gaskets are compressed to generate a pre-tightening force, thereby locking the slot on the locking part 4 and keeping the arc-shaped bracket 8 in a stable state. This step avoids the problem of traditional hoses easily falling off during drainage by mechanical locking, and at the same time improves the overall stability of the device.

[0032] Subsequently, the position of the puncture component 10 is adjusted according to actual construction needs. The sliding block 9 is slidably connected to the arc-shaped support 8 through a dovetail groove structure, allowing construction personnel to precisely adjust the position of the puncture component 10 via the sliding block 9. The puncture component 10 is a hollow metal tube, and its tip, after hardening treatment, possesses excellent penetrating ability, enabling it to easily insert into the inner wall of the well shaft to enhance the overall stability of the device. The hollow tube design of the puncture component 10 provides an additional drainage channel; this design is particularly suitable for high water pressure environments, solving the problem of high groundwater pressure while ensuring the smoothness of the drainage process.

[0033] After completing the above steps, the entire device forms a stable support and drainage system. The fixing block 3 evenly expands the inner wall of the wellbore through the adjustment of the bidirectional threaded sleeve 1; the arc-shaped bracket 8 achieves rapid installation and disassembly through the cooperation of the slot and the locking part 4; and the puncture component 10 meets the repair needs of different positions through the flexible adjustment of the sliding block 9. The modular design allows each component to be replaced or adjusted individually without the need for overall disassembly, significantly improving construction efficiency. Furthermore, the trapezoidal threaded connection method and the application of high-strength aluminum alloy further enhance the device's load-bearing capacity and anti-loosening performance, ensuring its long-term stable operation in complex downhole environments.

[0034] As can be seen from the specific application scenarios described above, this utility model achieves uniform expansion of the wellbore inner wall through the synergistic action of the bidirectional threaded sleeve 1 and the telescopic rod 2, solving the problems of large space occupation and inconvenient operation of traditional annular expansion mechanisms. The combined design of the arc-shaped support 8 and the puncture component 10 not only enhances the stability of the device but also provides an additional drainage function, effectively addressing the drainage needs of quick-setting repair mortar. The hollow tube design of the puncture component 10 ensures the drainage effect and extends the service life of the device. The overall structure is compact and easy to operate, enabling successful completion of repair tasks even in confined spaces within the well, reducing construction difficulty and labor costs.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A prefabricated wellbore gap leakage repair auxiliary device, characterized in that, The device includes a main support assembly and a positioning assembly. There are at least two sets of main support assemblies symmetrically arranged in the well casing. Each main support assembly includes a bidirectional threaded sleeve, a spreading assembly, and an adjusting assembly. One end of the spreading assembly is telescopically disposed inside the bidirectional threaded sleeve, and the other end abuts against the inside of the well casing to form a stable support. The adjusting assembly is threaded onto the spreading assembly. The positioning assembly can be engaged between the two sets of main support assemblies. The positioning assembly includes a puncture member. The adjusting assembly is used to push the puncture member into the well casing joint to drain the seepage water.

2. The prefabricated wellbore gap leakage repair auxiliary device according to claim 1, characterized in that, The expansion assembly includes a telescopic rod and a fixing block. One end of the telescopic rod is symmetrically disposed on the bidirectional threaded sleeve, and the other end is movably connected to the fixing block. The telescopic rod and the bidirectional threaded sleeve provide opposite synchronous support to the inner wall of the wellbore through their reverse threads.

3. The prefabricated wellbore gap leakage repair auxiliary device according to claim 2, characterized in that, The adjustment assembly includes a short threaded section, a drive block, a moving part, and a locking part. The short threaded section is located at one end of the telescopic rod, the drive block is threadedly connected to the short threaded section, the moving part is fixed to one side of the drive block, and the locking part slides on the telescopic rod and is movably connected to the moving part.

4. The prefabricated wellbore gap leakage repair auxiliary device according to claim 3, characterized in that, The card slot has several card slots.

5. The prefabricated wellbore gap leakage repair auxiliary device according to claim 4, characterized in that, The positioning component also includes an arc-shaped bracket and several sliding blocks. The two ends of the arc-shaped bracket are respectively engaged with the grooves of the locking part, and the several sliding blocks slide on the arc-shaped bracket. The puncture member is adjustablely disposed on the sliding blocks.

6. The prefabricated wellbore gap leakage repair auxiliary device according to claim 5, characterized in that, The arc of the arc-shaped support is consistent with the inner arc of the wellbore.

7. The prefabricated wellbore gap leakage repair auxiliary device according to claim 5, characterized in that: The puncture member and the sliding block are adjustable via a threaded connection.

8. The prefabricated wellbore gap leakage repair auxiliary device according to claim 5, characterized in that: The puncture device is a hollow tube with one end pointed.

9. The prefabricated wellbore gap leakage repair auxiliary device according to claim 2, characterized in that: The bidirectional threaded sleeve is connected to the telescopic rod by a symmetrical trapezoidal thread engagement.

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