Anti-caving casing device for geotechnical drilling

Abstract

The utility model provides a rock soil borehole is with anticollapse hole casing device, include: tubular body one, tubular body two, tubular body three, sleeve, bolt one, groove body one, board body, bolt two, groove body two, rubber ring, the tubular body one end is placed with tubular body two, the tubular body two one end is placed with tubular body three, the tubular body two and tubular body three one end all are connected with sleeve, the sleeve on tubular body two and tubular body one inner wall are pasted together, the sleeve on tubular body three and tubular body two are pasted together, the tubular body one and tubular body two all screw threads are connected with bolt one, two groups the bolt one is respectively connected with corresponding sleeve screw thread, the utility model discloses the improvement is with anticollapse hole casing device for rock soil borehole, has the mode of cable and casing synchronous down, casing protects cable, avoids its breakage, reduces construction step simultaneously, avoids the delay of construction period due to the separate threading, thereby effectively solved the problem and the deficiency in existing device.

Description

Technical Field

[0001] This utility model relates to the field of environmental surveying technology, and more specifically, to a hole-prevention casing device for rock and soil drilling. Background Technology

[0002] Anti-collapse casing for rock and soil drilling is a core piece of equipment for solving the problem of borehole collapse in complex strata such as loose, weak, and high water levels. Through physical isolation and borehole wall support, it achieves borehole stability and operational safety, and is widely used in geological exploration, pile foundation construction, mineral exploration and other fields.

[0003] In traditional drilling operations such as geological exploration, pile foundation construction, and mineral exploration, cables must be installed separately after the anti-collapse casing is fully lowered and secured. The borehole environment is complex and uncontrollable, with sharp rock fragments and weathered rock fragments often remaining around the borehole walls. Some loose strata may also experience continuous minor collapses, forming irregular obstacle zones. When cables are laid down from the borehole opening, they must traverse these areas without guidance or protection. The soft cable sheath is extremely prone to direct friction with sharp rock edges and hard gravel, causing minor wear and insulation damage, or even internal conductor breakage. Especially in medium-deep boreholes, the cable length can reach tens or even hundreds of meters. During the laying process, continuous tension is applied, further increasing the friction intensity between the cable and obstacles inside the borehole. Often, the cable shows multiple signs of wear as soon as it reaches the target depth, requiring repeated cable replacements and severely delaying the construction progress.

[0004] In view of this, we have studied and improved the existing problems and provided a hole-drilling anti-collapse casing device for rock and soil drilling. The aim of this technology is to solve the problems and improve its practical value. Utility Model Content

[0005] The purpose of this utility model is to provide a hole-proof casing device for rock and soil drilling, so as to solve the problems and shortcomings mentioned in the background art, such as the drilling operation cable being laid behind the hole, which is prone to wear and breakage due to obstacles inside the hole, thus delaying the construction period.

[0006] To achieve the above objectives, this utility model provides an anti-collapse casing device for rock and soil drilling, which is achieved by the following specific technical means:

[0007] A borehole casing device for preventing collapse in rock and soil drilling includes: a pipe body 1, a pipe body 2, a pipe body 3, a sleeve, a bolt 1, a groove 1, a plate, a bolt 2, a groove 2, and a rubber ring; a pipe body 2 is attached to one end of a pipe body 1, and a pipe body 3 is attached to one end of a pipe body 2. A sleeve is connected to one end of both pipe bodies 2 and 3. The sleeve on pipe body 2 is fitted against the inner wall of pipe body 1, and the sleeve on pipe body 3 is fitted against pipe body 2. Both pipe bodies 1 and 2... The tube body is connected by a bolt, and two sets of bolts are threadedly connected to the corresponding sleeves. One end of each of the tube body 1, tube body 2 and tube body 3 is provided with a groove, and multiple sets of grooves are connected to each other. Each set of grooves contains a plate, and one end of each plate is threadedly connected to a bolt, and multiple sets of bolts are threadedly connected to the corresponding groove. Each set of plates and tube body 1, tube body 2 and tube body 3 is provided with a groove.

[0008] As a further optimization of this technical solution, in the rock and soil drilling anti-collapse casing device of this utility model, one end of each of the multiple sets of plates is arc-shaped and the center of the circle is the same as that of pipe body one, pipe body two and pipe body three.

[0009] As a further optimization of this technical solution, the anti-collapse casing device for rock and soil drilling of this utility model has rubber rings bonded inside multiple sets of the second set of the grooves.

[0010] As a further optimization of this technical solution, the anti-collapse casing device for rock and soil drilling of this utility model has a funnel-shaped end of the casing body.

[0011] As a further optimization of this technical solution, the anti-collapse hole casing device for rock and soil drilling of this utility model has a slotted groove at one end of each of the multiple sets of bolts one and multiple sets of bolts two.

[0012] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0013] 1. The design of this utility model, including the groove body one, plate body, bolt two, groove body two, and rubber ring, features groove one at each end of the pipe body one, pipe body two, and pipe body three, all adapted to the plate body. One end of the plate body has an arc-shaped design, with its center aligned with each pipe body. This arc-shaped fit and nested groove one structure allows the plate body, after being embedded in the groove one, to form a seamless, smooth curved surface with the outer wall of the pipe body, completely avoiding the problem of the plate body protruding from the pipe body and scraping the borehole wall during lowering. Simultaneously, the two ends of the plate body are threadedly fixed to the groove body one by bolt two, ensuring that the plate body does not shift or fall off when subjected to borehole wall pressure or vibration, further maintaining the integrity of the pipe body's external shape and reducing disturbance to the borehole wall in loose or weak formations. Especially in high-water-level formations, it effectively reduces the risk of seepage and collapse caused by borehole wall damage, enhancing the active protection effect on the borehole wall. The design of the second cable tray allows for centralized cable storage. Combined with rubber rings adhered to the inner wall of the second tray, a flexible protective layer is formed. The rubber rings fill the gaps between the cables and the edges of the second tray, preventing wear caused by direct contact between the cables and the metal tray. They also act as a buffer against construction vibrations or slight cable displacement, reducing the probability of accidental cable breakage. Furthermore, the simultaneous lowering of cables and conduits, with the conduits protecting the cables from damage and reducing construction steps, avoids delays caused by individual cable pulling. Centralized cable storage also facilitates precise control of cable position during subsequent construction, preventing tangling and misalignment that could affect data transmission, such as for testing cables in geological surveys or construction operations. This ensures the stability of cable transmission and the continuity of the construction process, making it widely applicable to a certain extent.

[0014] 2. The utility model's design incorporates three tubes (tube 1, tube 2, tube 3), a sleeve, and a bolt. This device employs a modular assembly of tubes 1, 2, and 3, with the threaded connection between the sleeve and bolt 1 as the core splicing mechanism, constructing a sleeve system that combines stability and flexibility. Structurally, tube 2 serves as an addable or subtractable intermediate unit. Its two ends are respectively nested with tubes 1 and 3 via sleeves. The sleeve at the end of tube 2 fits against the inner wall of tube 1, while the sleeve at the end of tube 3 adapts to the inner wall of tube 2. Bolt 1 penetrates the side wall of the tube and locks into the sleeve's thread, forming a splicing node. This design, to a certain extent, prevents the sleeve from loosening or disengaging under borehole pressure or during lowering, ensuring the overall structural stability. In shallow drilling operations, only the combination of pipe body one and pipe body three can be used, simplifying the structure and improving construction efficiency. In medium-deep drilling scenarios, the number of pipe body two sections can be increased according to the actual depth requirements. For example, when the drilling depth exceeds the combined length of pipe body one and pipe body three, each additional pipe body two section can extend the corresponding length, and the splicing process for the new pipe body two sections is the same as the initial splicing, requiring no additional adjustments to the construction process. This allows the same device to be applied to different scenarios such as shallow sampling drilling in geological exploration, medium-deep support drilling in pile foundation construction, and deep well detection in mineral exploration, reducing the cost for construction units to purchase special casings for drilling at different depths, while also reducing the pressure on equipment storage and transportation, and to a certain extent improving the versatility and construction flexibility of the device.

[0015] 3. This utility model improves the anti-collapse casing device for rock and soil drilling, featuring a mode in which the cable and casing are lowered simultaneously. The casing protects the cable and prevents it from being damaged. At the same time, it reduces construction steps and avoids construction delays caused by separate cable threading, thus effectively solving the problems and shortcomings of existing devices. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 Schematic diagrams of cross-sectional structures of tube body one, tube body two, and tube body three;

[0019] Figure 3 A schematic diagram of the structure of the trough body 1, the plate body, and the bolts 2;

[0020] Figure 4 This is a schematic diagram of the structure of tank body two, the rubber ring, and tank body one.

[0021] In the diagram: 1. Pipe body one; 2. Pipe body two; 3. Pipe body three; 4. Sleeve; 5. Bolt one; 6. Groove one; 7. Plate; 8. Bolt two; 9. Groove two; 10. Rubber ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some embodiments of the present utility model, but not all embodiments.

[0023] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to has a specific orientation, or is constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms “first,” “second,” “third,” etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0025] Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figures 1 to 4 This utility model provides a specific technical implementation scheme for an anti-collapse casing device for rock and soil drilling:

[0027] A borehole casing device for rock and soil drilling includes: a pipe body 1, a pipe body 2, a pipe body 3, a sleeve 4, a bolt 1 5, a groove 1 6, a plate 7, a bolt 2 8, a groove 2 9, and a rubber ring 10. Pipe body 2 is fitted to one end of pipe body 1, and pipe body 3 is fitted to one end of pipe body 2. Pipe bodies 1, 2, and 3 are modularly designed, allowing for selection of the number of pipe bodies 2 according to actual needs, thus adapting to boreholes of different depths. Sleeves 4 are connected to one end of both pipe bodies 2 and 3. The sleeve 4 on pipe body 2 fits against the inner wall of pipe body 1, and the sleeve 4 on pipe body 3 fits against pipe body 2. Both pipe bodies 1 and 2 are threaded together with bolts 1 5. After bolts 1 5 are screwed into sleeves 4, pipe body 2 and pipe body 1 can be connected together. Alternatively, tube body 3 can be connected to tube body 2. Two sets of bolts 5 are threadedly connected to the corresponding sleeves 4. One end of tube body 1, tube body 2, and tube body 3 is provided with a groove 6. Multiple sets of grooves 6 are connected. Plates 7 are placed in each set of grooves 6. One end and the other end of each set of plates 7 are threadedly connected with bolts 8. Bolts 8 are used to fix plates 7 in the grooves 6. Multiple sets of bolts 8 are threadedly connected to the corresponding grooves 6. One end of each set of plates 7 and tube body 1, tube body 2, and tube body 3 is provided with a groove 9. Grooves 9 are used to insert cables. When inserting tube body 1, tube body 2, and tube body 3, the cables can be inserted into the borehole together to avoid the cables directly rubbing against sharp rocks or falling blocks in the hole, or being accidentally broken by subsequent operations such as drilling or sampling.

[0028] One end of each of the multiple plates 7 is arc-shaped and the center of the circle is the same as that of tube 1, tube 2 and tube 3. After the plate 7 is inserted into the groove 6, it fits with the outer wall of the tube, thus avoiding the problem of the plate 7 protruding and causing the drilling to break.

[0029] Rubber rings 10 are glued inside multiple sets of tanks 2 9 to prevent the cables from rubbing against the tanks 2 9;

[0030] One end of the tube body is funnel-shaped, which makes centering easier and insertion into the drill hole more convenient;

[0031] Both bolt group 15 and bolt group 28 have a slotted groove at one end to facilitate the tightening of bolt group 15 and bolt group 28 with tools.

[0032] Specifically, before use, the rubber ring 10 can be inspected to check if it is damaged, so as to avoid cable damage caused by the damage of the rubber ring 10. The groove 6 can be cleaned to avoid debris in the groove 6, which may cause some areas to remain outside the groove 6 after the plate 7 is inserted, making it difficult to insert the device into the drilling hole, and may also cause the drilling hole to break, which may lead to the problem of the drilling hole collapsing.

[0033] Specific implementation steps:

[0034] The sleeve 4 at the end of pipe body 2 fits against the inner wall of pipe body 1, and the sleeve 4 at the end of pipe body 3 fits against the inner wall of pipe body 2. Bolt 5 penetrates the side walls of pipe body 1 and pipe body 2 and is threadedly locked to the corresponding sleeve 4, forming a stable splicing node. This allows multiple pipe sections to be combined into a single casing structure, preventing loosening or disassembly during lowering or under borehole pressure. The number of pipe bodies 2 can be increased or decreased depending on the actual drilling depth requirements. Shallow drilling can use only pipe body 1 and pipe body 3, while medium-deep drilling extends the total casing length by adding pipe bodies 2, adapting to different depth operating scenarios without adjusting the construction process. The grooves 6 at the ends of pipe body 1, pipe body 2, and pipe body 3 are connected. Plate 7 is embedded in groove 6 and fixed by bolt 8. Plate 7 and groove 9 opened in each pipe body form a cable channel. The cable is run through it and lowered synchronously with the sleeve, avoiding direct friction with sharp rock debris and collapsed blocks in the hole when the cable is run alone. The rubber ring 10 adhered to the inner wall of groove 9 forms a flexible protective layer, filling the gap between the cable and the edge of groove 9. This prevents the cable from directly contacting the metal groove 9 and causing wear, and also acts as a buffer during construction vibration or slight cable displacement, reducing the risk of cable breakage. One end of plate 7 is designed as an arc concentric with the pipe body. After being embedded in groove 6, it forms a smooth curved surface that seamlessly connects with the outer wall of the pipe body, preventing plate 7 from protruding and scraping the hole wall, reducing disturbance to the hole wall of loose and weak strata, and reducing the possibility of water seepage and collapse in high water table strata.

[0035] In summary, this anti-collapse casing device for geotechnical drilling utilizes an adaptable groove at each of the first, second, and third ends of the casing. An arc-shaped plate is embedded within the groove, seamlessly connecting to the outer wall of the casing. Bolts secure the groove to prevent displacement, reducing borehole wall disturbance and mitigating the risk of collapse due to water seepage in high-water-level formations. The second groove houses the cable, with an inner rubber ring for wear protection and buffering. The cable is lowered synchronously with the casing, eliminating delays caused by separate cable threading and ensuring continuous transmission and construction. The modular design, achieved through the connection of the sleeve and bolts, allows for the addition or removal of the second casing, adapting to both shallow and deep boreholes. This reduces procurement and storage costs, enhances versatility and flexibility, and effectively addresses the problems and shortcomings of existing devices.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A borehole casing device for preventing collapse during rock and soil drilling, comprising: Pipe body one (1), pipe body two (2), pipe body three (3), sleeve (4), bolt one (5), groove one (6), plate (7), bolt two (8), groove two (9), rubber ring (10); characterized in that: pipe body one (1) is fitted with pipe body two (2) at one end, pipe body two (2) is fitted with pipe body three (3) at one end, and sleeve (4) is connected to one end of both pipe body two (2) and pipe body three (3). The sleeve (4) on pipe body two (2) is fitted with the inner wall of pipe body one (1), and the sleeve (4) on pipe body three (3) is fitted with pipe body two (2). (2) All are threaded with bolts (5), and the two sets of bolts (5) are threaded to the corresponding sleeves (4). One end of the pipe body (1), pipe body (2) and pipe body (3) is provided with a groove (6). Multiple sets of grooves (6) are connected. Plates (7) are placed in the grooves (6). One end and the other end of the multiple sets of plates (7) are threaded with bolts (8). Multiple sets of bolts (8) are threaded to the corresponding grooves (6). One end of the multiple sets of plates (7) and pipe body (1), pipe body (2) and pipe body (3) is provided with a groove (9).

2. The anti-collapse casing device for rock and soil drilling according to claim 1, characterized in that: One end of each of the multiple sets of plates (7) is arc-shaped and the center of the circle is the same as that of tube one (1), tube two (2) and tube three (3).

3. The anti-collapse casing device for rock and soil drilling according to claim 1, characterized in that: Rubber rings (10) are adhered to the inside of multiple sets of the second (9) tank.

4. The anti-collapse casing device for rock and soil drilling according to claim 1, characterized in that: One end of the tube body (3) is funnel-shaped.

5. The anti-collapse casing device for rock and soil drilling according to claim 1, characterized in that: Both the first set of bolts (5) and the second set of bolts (8) have a slotted groove at one end.

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