A vertical pipe well casing fixing device

Abstract

The utility model relates to a casing fixing device belongs to vertical tube well technical field, concretely is a vertical tube well casing fixing device, including a plurality of casings and a plurality of support rods, both ends of casing are all provided with mounting slot, still include mounting sleeve, spacing cover subassembly and buffer assembly, the utility model reached the effect that the stability and sealing performance of overall structure have been improved, solved the support leg and the top board of the existing patent rigid structure, cannot absorb external vibration, easily lead to casing connecting part deviation or loosening, long -term stability is poor, in addition every section casing needs to install top board and adjusting screw alone, and the construction efficiency is low and is easy to appear the problem of section misregistration.

Description

Technical Field

[0001] This utility model relates to the field of vertical well technology, and in particular to a vertical well casing fixing device. Background Technology

[0002] Vertical wells are generally used in drilling operations to create vertical shafts, in building, municipal engineering, or underground engineering projects. Casing is required to ensure that the well remains stable and vertical during construction and use, and to prevent displacement or leakage.

[0003] A search revealed Chinese patent CN211231878U, which discloses a sleeve fixing device. This device consists of two parts, a top plate forming a complete circle, with multiple support legs at the bottom of the top plate. In use, the pipe is first inserted into the sleeve, and then the two top plates are inserted to form a circular support structure that positions the sleeve and pipe. The gap between the pipe and sleeve is determined by the width A of the support legs. A positioning nut and a support screw are located above the top plate, allowing for fine-tuning of the gap between the pipe and sleeve by adjusting the support screw. This device can completely position the sleeve and pipe, achieving coaxial constraint. After constraining the pipe, the device can be removed to allow for internal material filling to completely fix the pipe. Its simple structure, high construction accuracy, low cost, and ease of use make it an ideal sleeve fixing device.

[0004] Based on the above search and existing technology, the findings were as follows:

[0005] The support legs and top plate of the aforementioned patents are rigid structures that cannot absorb external vibrations, which can easily lead to displacement or loosening of the sleeve connection and poor long-term stability. In addition, each sleeve section requires a separate installation of the top plate and adjusting screw, resulting in low construction efficiency and easy misalignment between sections, thus having certain limitations. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model proposes a vertical well casing fixing device, which improves the overall structural stability and sealing performance.

[0007] The technical solution to achieve the purpose of this utility model is: a vertical well casing fixing device, including multiple casings and multiple support rods, with mounting grooves opened at both ends of the casings, and also including a mounting sleeve, a limiting cover assembly and a buffer assembly;

[0008] The mounting sleeve is fitted onto the mounting groove, and a mounting ring is provided at the top of the mounting sleeve;

[0009] The limiting cover assembly includes multiple connecting rods fixedly mounted on the mounting ring, and the limiting ring is fixedly mounted together among the multiple connecting rods.

[0010] The buffer assembly includes an elastic damping rod fixedly installed outside the mounting sleeve, and a roller is rotatably mounted on the telescopic end of the elastic damping rod.

[0011] Preferably, a rotating sleeve is rotatably mounted on the mounting ring, and multiple fastening bolts are threaded onto the external side of the mounting sleeve. The mounting sleeve is fixedly connected to the mounting groove by the fastening bolts, and an clearance groove is provided on the mounting sleeve.

[0012] Preferably, the mounting ring is rotatably provided with multiple baffles, the baffles are rotatably connected to the mounting ring through a rotating sleeve, the rotating sleeve is disposed outside the mounting ring, a connecting plate is fixedly installed on the rotating sleeve, and an arc-shaped plate is fixedly installed on the connecting plate, both the connecting plate and the arc-shaped plate are adapted to the clearance groove.

[0013] Preferably, a plurality of sliding sleeves are fixedly installed on the limiting ring, the limiting ring is slidably connected to the support rod through the sliding sleeves, and a clearance is formed between the limiting ring and the mounting sleeve through a connecting rod.

[0014] Compared with existing technologies, the significant advantages of this invention are:

[0015] Firstly, this invention achieves precise guidance and automatic alignment, improving installation accuracy. By setting an installation groove at the end of the sleeve, and in conjunction with the installation sleeve and the inverted conical limiting cover structure, each sleeve section can slide and adjust its position along the inclined surface of the limiting cover during lowering, thereby achieving automatic guidance and alignment. This design effectively reduces potential deviations during initial installation, improves docking accuracy and coaxiality, and ensures stable connection and sealing between sleeves.

[0016] Secondly, this invention provides shock absorption protection through a buffer assembly, enhancing seismic performance. The buffer assembly, composed of elastic damping rods and rollers, provides necessary support and shock absorption during the lowering and use of the casing. This assembly not only reduces frictional resistance but also absorbs the impact force from external vibrations, preventing further displacement or damage to the connection points due to lack of buffering. Compared to the problem of traditional methods where compaction after filling easily exacerbates deviations, this solution significantly enhances the system's seismic resistance and structural stability.

[0017] Thirdly, this invention features an automatic opening and clearance design for the sealing cover, optimizing filling effect and fluid transmission. It employs a conical sealing cover structure composed of baffles, combined with a control plate and rotating sleeve to achieve automatic opening of the sealing cover. This ensures the internal cavity is connected after the upper and lower casings are connected, while preventing filler material from accumulating at the top of the mounting sleeve and causing blockage. Furthermore, the clearance opening on the limiting ring facilitates the smooth passage of filling material, preventing localized accumulation that could affect cementing performance. These designs collectively improve filling density and construction efficiency, ensuring the safety and reliability of subsequent operation.

[0018] This invention solves the problem that the existing patented support legs and top plate are rigid structures that cannot absorb external vibrations, which can easily lead to misalignment or loosening of the sleeve connection and poor long-term stability. In addition, each sleeve section requires a separate installation of the top plate and adjusting screw, resulting in low construction efficiency and a tendency for misalignment between sections. Attached Figure Description

[0019] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is a schematic diagram of the overall structure provided by this utility model;

[0021] Figure 2 This is a schematic diagram of the support rod structure provided by this utility model;

[0022] Figure 3 This is a schematic diagram of the sleeve structure provided by this utility model;

[0023] Figure 4 This is a three-dimensional structural diagram of the sealing cover provided by this utility model;

[0024] Figure 5 This utility model provides Figure 4 Enlarged structural diagram at point A in the diagram;

[0025] Figure 6 This is a top view schematic diagram of the sealing cover structure provided by this utility model;

[0026] Figure 7 This is a three-dimensional structural diagram of the mounting sleeve provided by this utility model;

[0027] Figure 8 This is a front view structural diagram of the mounting sleeve provided by this utility model;

[0028] Figure 9 This is a schematic diagram of the baffle structure provided by this utility model;

[0029] Figure 10 This is a schematic diagram of the control board structure provided by this utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Sleeve; 2. Connecting rod; 3. Clearance opening; 4. Sliding sleeve; 5. Mounting sleeve; 6. Fastening bolt; 7. Elastic damping rod; 8. Roller; 9. Mounting ring; 10. Rotating sleeve; 11. Baffle; 12. Connecting plate; 121. Arc plate; 13. Clearance groove; 14. Support rod; 15. Limiting ring; 16. Mounting groove. Detailed Implementation

[0032] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0033] This utility model provides an improved vertical well casing fixing device. The technical solution of this utility model is as follows:

[0034] like Figures 1-10 As shown, a vertical well casing fixing device includes multiple casings 1 and multiple support rods 14. Both ends of the casing 1 are provided with mounting grooves 16. The mounting grooves 16 cooperate with the mounting sleeve 5 and the inverted conical limiting cover structure, so that each section of casing 1 can slide and adjust its position along the inclined surface of the limiting cover during the lowering process, thereby realizing automatic guidance and centering. It also includes the mounting sleeve 5, the limiting cover assembly and the buffer assembly.

[0035] The mounting sleeve 5 is fitted onto the mounting groove 16, and the top of the mounting sleeve 5 is provided with a mounting ring 9, which improves the docking accuracy and coaxiality.

[0036] The limiting cover assembly includes multiple connecting rods 2 fixedly mounted on the mounting ring 9. The multiple connecting rods 2 are jointly fixedly mounted with the limiting ring 15, which ensures the stable connection and sealing between the sleeves 1.

[0037] The buffer assembly includes an elastic damping rod 7 fixedly installed on the outside of the mounting sleeve 5. A roller 8 is rotatably installed on the telescopic end of the elastic damping rod 7. The roller 8 can reduce friction. Secondly, the elastic damping rod 7 can ensure the stability of the mounting sleeve 5 during lowering through its elasticity.

[0038] Furthermore, a rotating sleeve 10 is rotatably mounted on the mounting ring 9, and multiple fastening bolts 6 are threadedly connected to the external of the mounting sleeve 5. The mounting sleeve 5 is fixedly connected to the mounting groove 16 through the fastening bolts 6. An avoidance groove 13 is provided on the mounting sleeve 5, and the sealing cover has a positive conical structure, so that the filler will not accumulate at the top of the mounting sleeve 5 when the filler is put in.

[0039] As a further embodiment of this utility model, multiple baffles 11 are rotatably mounted on the mounting ring 9. The baffles 11 are rotatably connected to the mounting ring 9 via a rotating sleeve 10. The rotating sleeve 10 is located outside the mounting ring 9, and a connecting plate 12 is fixedly mounted on the rotating sleeve 10. An arc-shaped plate 121 is fixedly mounted on the connecting plate 12. Both the connecting plate 12 and the arc-shaped plate 121 are adapted to the clearance groove 13. The connecting plate 12 and the arc-shaped plate 121 constitute a control plate. The baffles 11 form a positive conical sealing cover structure. Combined with the control plate and the rotating sleeve 10, the sealing cover can be automatically opened, which not only ensures the internal cavity is connected after the upper and lower sleeves 1 are connected, but also avoids the problem of filling material accumulating on the top of the mounting sleeve 5 and causing blockage.

[0040] Furthermore, multiple sliding sleeves 4 are fixedly installed on the limiting ring 15. The limiting ring 15 is slidably connected to the support rod 14 through the sliding sleeves 4. The limiting ring 15 and the mounting sleeve 5 are connected by a connecting rod 2 to form an avoidance opening 3. The setting of the support rod 14 ensures the stability of the mounting sleeve 5 with the sleeve 1 when it is lowered.

[0041] The specific working method is as follows: Install mounting sleeves 5 in the upper and lower mounting grooves 16 of each casing section 1 and fix them with fastening bolts 6. Slide the limiting ring 15 to the support rod 14 inside the vertical well via the sliding sleeve 4 to ensure the guiding stability of the casing 1 during lowering. Place the first casing section 1 into the well, and the elastic damping rod 7 and roller 8 of the buffer assembly contact the inner wall of the well. Adjust the elasticity to automatically center the casing 1. During the lowering process, the roller 8 reduces friction, and the elastic damping rod 7 absorbs vibration, keeping the casing 1 vertical. After the first casing section 1 is in place, fill it with sand and gravel to below the bottom of the mounting sleeve 5. When lowering the second casing section 1, its bottom end slides into the first section along the inverted conical limiting cover. The mounting sleeve 5 at the top of the sleeve 1 enables precise docking. During docking, the bottom of the second sleeve 1 presses against the control plate, causing the rotating sleeve 10 to rotate and the baffle 11 to open in a petal shape, forming a connecting channel. After the control plate fully enters the clearance groove 13, the two sleeve sections 1 fit tightly together, and the baffle 11 remains open inside the second sleeve section 1 to ensure material flow. Sand and gravel are then filled and evenly distributed through the clearance opening 3 to avoid accumulation. The above steps are repeated, and the sleeve 1 is lowered and docked section by section until all installations are completed. During construction and use, the elastic damping rod 7 continuously buffers external vibrations, and the roller 8 and support rod 14 work together to keep the sleeve 1 centered, enhancing the overall structural stability.

[0042] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. A vertical well casing fixing device, comprising multiple casings (1) and multiple support rods (14), characterized in that: The sleeve (1) has mounting grooves (16) at both ends, and also includes; Mounting sleeve (5), which is fitted onto mounting groove (16), and mounting ring (9) is provided at the top of mounting sleeve (5); A limiting cover assembly, the limiting cover assembly including a plurality of connecting rods (2) fixedly mounted on a mounting ring (9), and a limiting ring (15) fixedly mounted together among the plurality of connecting rods (2); The buffer assembly includes an elastic damping rod (7) fixedly installed outside the mounting sleeve (5), and a roller (8) is rotatably installed on the telescopic end of the elastic damping rod (7).

2. The vertical well casing fixing device according to claim 1, characterized in that: A rotating sleeve (10) is rotatably mounted on the mounting ring (9). Multiple fastening bolts (6) are threaded onto the outside of the mounting sleeve (5). The mounting sleeve (5) is fixedly connected to the mounting groove (16) by the fastening bolts (6). An clearance groove (13) is provided on the mounting sleeve (5).

3. The vertical well casing fixing device according to claim 2, characterized in that: Multiple baffles (11) are rotatably arranged on the mounting ring (9). The baffles (11) are rotatably connected to the mounting ring (9) via a rotating sleeve (10). The rotating sleeve (10) is located outside the mounting ring (9). A connecting plate (12) is fixedly installed on the rotating sleeve (10). An arc plate (121) is fixedly installed on the connecting plate (12). Both the connecting plate (12) and the arc plate (121) are adapted to the clearance groove (13).

4. A vertical well casing fixing device according to any one of claims 1-3, characterized in that: Multiple sliding sleeves (4) are fixedly installed on the limiting ring (15). The limiting ring (15) is slidably connected to the support rod (14) through the sliding sleeves (4). The limiting ring (15) and the mounting sleeve (5) form an avoidance opening (3) through the connecting rod (2).

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