Directional drilling equipment for horizontal curtain construction

Abstract

The application provides a directional drilling equipment for horizontal curtain construction, a limiting cylinder is rotationally arranged in a limiting mechanism, and the limiting cylinder is sleeved with a drill rod; a plurality of limiting claws are arranged on the outer wall of the limiting mechanism and abut on the inner wall of a drilling hole; one end of a supporting mechanism is detachably connected with the limiting mechanism, the supporting mechanism comprises a plurality of detachably connected supporting cylinders, the drill rod is arranged in the supporting cylinders, and a plurality of telescopic supporting claws are arranged on the outer wall of the supporting cylinders; a distance limiting mechanism is arranged between the limiting mechanism and a blowout preventer of a drilling hole orifice, the distance limiting mechanism is connected with the supporting cylinders in series and connected with the supporting claws of the supporting cylinders. The limiting mechanism and the limiting cylinder are matched, the supporting mechanism can move along with the drilling of the drill rod, cannot rotate along with the drill rod, can facilitate the separation between adjacent supporting cylinders, meanwhile, the supporting cylinder can form segmented support for the drill rod when the supporting cylinder abuts against the hole wall through the telescopic supporting claws, the drill bit is effectively prevented from being skewed, and the construction quality of the horizontal curtain is improved.

Description

Technical Field

[0001] This application belongs to the field of drilling equipment technology, and more specifically, relates to a directional drilling device for horizontal curtain construction. Background Technology

[0002] A horizontal curtain is a continuous, artificially constructed horizontal impermeable body, such as a curtain grouting system, a high-pressure jet grouting system, or an impermeable membrane, that cuts off the vertical and horizontal seepage path of groundwater. It is commonly used in scenarios such as vertical groundwater barrier in mines, seepage prevention in underground engineering, and seepage prevention in tailings dams.

[0003] When constructing a horizontal curtain wall, horizontal drilling is required first. During horizontal drilling, the drill rod is horizontal, and its own weight and the varying properties of the rock can cause borehole deviation. When the drill rod is short, its own stiffness is sufficient to resist the bending moment generated during drilling, and the drilling direction is relatively stable. However, as the drill rod lengthens, the lever arm of gravity increases, and the bending moment increases significantly. Once it exceeds the stiffness limit of the drill rod itself, the drill rod will sag in the middle, similar to a long horizontally placed rod bending due to its own weight. This causes the drill bit to deviate from the horizontal direction, resulting in deviation and affecting the construction quality of the horizontal curtain wall. Summary of the Invention

[0004] The purpose of this application is to provide a directional drilling device for horizontal curtain wall construction, so as to improve the horizontality of the drilling and ensure the construction quality of the horizontal curtain wall.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: A directional drilling device for horizontal curtain wall construction is provided, comprising a limiting mechanism, a supporting mechanism, and a limiting mechanism. The limiting mechanism has a columnar inner cavity, within which a limiting cylinder is rotatably disposed, and the limiting cylinder is sleeved and fixed to the drill rod. The outer wall of the limiting mechanism is provided with multiple limiting claws, which abut against the inner wall of the borehole, fixing the limiting mechanism and the borehole circumferentially. The limiting claws can also slide axially along the borehole. The supporting mechanism includes multiple detachably connected supporting cylinders. A rod passes through the support cylinder. One end of the support cylinder near the limiting mechanism is detachably connected to the limiting mechanism. The outer wall of the support cylinder is provided with multiple retractable support claws. The distance limiting mechanism is connected in series with the support cylinder and is drivenly connected to the support claws of the support cylinder. One end of the distance limiting mechanism is fixedly connected to the blowout preventer at the borehole opening. If the axial distance between the support cylinder and the borehole opening reaches a preset distance, the distance limiting mechanism can cause the support claws to extend outward and press against the borehole wall, and the support cylinder separates from the adjacent support cylinder.

[0006] In one possible implementation, the limiting claw includes a limiting rod and a limiting plate disposed at the top of the limiting rod, wherein the front end face and the rear cross-section of the limiting plate are chamfered; the outer wall of the limiting mechanism is provided with a telescopic hole extending radially along the drill hole, the limiting rod is slidably inserted into the telescopic hole, and a first spring is provided between the limiting rod and the bottom of the telescopic hole.

[0007] In one possible implementation, the limiting mechanism is cylindrical, including two first limiting semi-cylinders. The inner wall of the first limiting semi-cylinder is provided with a limiting semi-groove, and the two sides of the first limiting semi-cylinder are provided with connecting ears extending radially outward. When the two first limiting semi-cylinders are fastened together, the limiting semi-grooves are combined to form an annular limiting groove, and the two opposite connecting ears are connected by bolts. The limiting cylinder includes two second limiting semi-cylinders, the outer wall of the second limiting semi-cylinder is provided with a limiting semi-ring. When the two second limiting semi-cylinders are fastened together, the two limiting semi-rings are combined to form a limiting ring, and the limiting ring is inserted into the limiting groove.

[0008] In one possible implementation, the sidewall of the support cylinder is provided with a plurality of axially extending drive cavities, and a first drive plug is slidably disposed in the drive cavity, the first drive plug corresponding one-to-one with the support claw; the sidewall of the support cylinder is provided with a plurality of radially extending drive holes, the drive holes communicating with one end of the drive cavity, a second drive plug being slidably disposed in the drive hole, the support claw being connected to the outer end of the second drive plug, the drive cavity behind the first drive plug and the drive hole below the second drive plug being connected to form a sealed cavity, the sealed cavity being filled with hydraulic oil.

[0009] In one possible implementation, one end of the support cylinder is provided with a plurality of locking rods, and a locking strip is slidably provided on the locking rods along the radial direction of the support cylinder. The locking strip can extend out of the locking rod or retract into the locking rod. The other end of the support cylinder is provided with a plurality of locking holes, and a locking groove is provided on one side of the locking hole. The locking rod is inserted into the locking hole, and a portion of the locking strip extends into the locking groove to be fixed to the adjacent support cylinder.

[0010] In one possible implementation, the locking rod has a first sliding hole, and the locking strip is slidably disposed within the first sliding hole, the length of the locking strip being greater than the length of the first sliding hole; a reset groove communicating with the first sliding hole is provided on one side of the first sliding hole, and a reset plate is provided on the locking strip, the reset plate being slidably disposed within the reset groove, a second spring being provided between the reset plate and the reset groove, the second spring being configured with a preload force to retract the locking strip back to the inner side of the locking rod; a plurality of unlocking plates are slidably disposed on the support cylinder, the unlocking plates corresponding one-to-one with the locking rods, and the unlocking plates being disposed on the inner side of the corresponding locking rods, the unlocking plates being able to slide toward the locking strip so that the locking strip extends outward from the locking rod, or the unlocking plates being able to slide away from the locking strip so that the locking strip retracts back to the inner side of the locking rod.

[0011] In one possible implementation, the end of the support cylinder near the drill bit is provided with a first groove, and the unlocking plate is slidably disposed in the first groove along the axial direction of the support cylinder. The end of the support cylinder away from the drill bit is provided with a second groove extending along the axial direction of the support cylinder. The second groove is disposed inside the locking hole and communicates with the locking hole. When two adjacent support cylinders are locked, the first groove communicates with the second groove, and a portion of the unlocking plate is inserted into the second groove.

[0012] In one possible implementation, the first drive plug and the unlocking plate are connected by a first connecting rod. One side of the drive cavity is provided with a clearance groove communicating with the drive cavity, and the first connecting rod is inserted into the clearance groove. A sealing plate is provided on the first connecting rod, and the sealing plate blocks the clearance groove behind the first drive plug to prevent hydraulic oil from leaking into the first groove.

[0013] In one possible implementation, the distance limiting mechanism includes multiple distance limiting components, each including an automatic reel and a rope. The rear end face of the support cylinder has a receiving hole, the automatic reel is disposed within the receiving hole, which is located at one end of the drive cavity. The automatic reel is connected to the first drive plug via a second connecting rod. One end of the rope is connected to the automatic reel, and the other end of the rope is connected to an adjacent support cylinder.

[0014] In one possible implementation, the support claw includes a support plate and a ratchet structure disposed on the support plate, the ratchet structure extending beyond the support plate, and the ratchet of the ratchet structure constituting a unidirectional rotation when pulled out of the borehole; the automatic reel is slidably arranged, and a third spring is provided between the automatic reel and the bottom of the receiving hole, the third spring being configured with a preload force for the support claw to retract at times.

[0015] The beneficial effects of the directional drilling equipment for horizontal curtain wall construction provided in this application are as follows: Compared with the prior art, this application achieves circumferential fixation by using limiting claws to press against the hole wall, while simultaneously sliding along the axial direction. In conjunction with the limiting cylinder, the support mechanism can move with the drilling rod but will not rotate with it, facilitating separation between adjacent support cylinders. Furthermore, the support mechanism consists of multiple detachable support cylinders, with the drill rod passing through them. When the support cylinders are pressed against the hole wall by retractable support claws, they can be fixed relative to the borehole. The fixed support cylinders separate from those with the support claws not extended. By fixing and separating the support cylinders one by one with the borehole, segmented support is provided for the drill rod, dispersing the bending moment generated by the drill rod's own weight and preventing sagging in the middle. The distance limiting mechanism can control the support cylinders to automatically fix at a preset distance and separate from adjacent support cylinders, allowing the support cylinders to be sequentially fixed along the borehole axis as the drill rod extends, achieving "multi-point segmented support" for long drill rods. This effectively prevents the drill bit from tilting downwards, ensuring the stability of the horizontal drilling direction and improving the quality of the horizontal curtain wall construction. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the working structure of the directional drilling equipment for horizontal curtain construction provided in the embodiments of this application; Figure 2 This is a schematic diagram of the limiting mechanism provided in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the limiting cylinder provided in the embodiments of this application; Figure 4 A schematic diagram of the structure of the support cylinder at one angle provided in an embodiment of this application; Figure 5 This is a structural schematic diagram of the support cylinder provided in an embodiment of this application from another angle; Figure 6 This is a schematic diagram of the structure when adjacent support cylinders are locked, as provided in an embodiment of this application. Figure 7 for Figure 6 Enlarged view of part A; Figure 8 for Figure 6 Enlarged view of part B; Figure 9 This is a structural schematic diagram of adjacent support cylinders when separated, as provided in an embodiment of this application. Figure 10 for Figure 9 Enlarged view of part C; Figure 11 for Figure 10 Enlarged view of part D.

[0018] The labels for the attached figures are as follows: 1. Limiting mechanism; 2. Drill pipe; 3. Support mechanism; 101. Inner cavity; 102. Limiting cylinder; 103. Limiting claw; 104. Limiting rod; 105. Limiting plate; 106. First limiting half-cylinder; 107. Second limiting half-cylinder; 108. Limiting groove; 109. Connecting lug; 110. Limiting half-ring; 111. Limiting ring; 301. Support claw; 302. Support cylinder; 303. Drive cavity; 304. First drive plug; 305. Drive hole; 306. Second drive plug; 307. Locking rod; 308. Locking bar; 309. Locking hole; 310. Locking groove; 311. Reset groove; 312. Reset plate; 313. Second spring; 314. Unlocking plate; 315. First slide groove; 316. Second slide groove; 317. First connecting rod; 318. Clearance groove; 319. Sealing plate; 320. Support plate; 321. Ratchet structure; 401. Distance limiting component; 402. Automatic reel; 403. Rope; 404. Third spring. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] It should be further noted that the accompanying drawings and embodiments of this application mainly describe the concept of this application. Based on this concept, some specific forms and arrangements of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of this application, they can implement the above-mentioned specific forms and arrangements in a well-known manner.

[0021] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] The terms “length”, “width”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0024] The directional drilling equipment for horizontal curtain construction provided in this application will now be described.

[0025] Please refer to the following: Figures 1 to 11 A directional drilling device for horizontal curtain wall construction includes a limiting mechanism 1, a support mechanism 3, and a limiting mechanism. The limiting mechanism 1 has a columnar inner cavity 101, within which a limiting cylinder 102 is rotatably mounted and fixed to the drill rod 2. Multiple limiting claws 103 are provided on the outer wall of the limiting mechanism 1, abutting against the inner wall of the borehole, thus fixing the limiting mechanism 1 to the borehole circumferentially. The limiting claws 103 can also slide axially along the borehole. The support mechanism 3 includes multiple detachably connected support cylinders 302, through which the drill rod 2 passes. Inside the support cylinder 302, one end of the support cylinder 302 adjacent to the limiting mechanism 1 is detachably connected to the limiting mechanism 1. The outer wall of the support cylinder 302 is provided with multiple retractable support claws 301. The distance limiting mechanism is connected in series with the support cylinder 302 and is drivenly connected to the support claws 301 of the support cylinder 302. One end of the distance limiting mechanism is fixedly connected to the blowout preventer at the borehole opening. If the axial distance between the support cylinder 302 and the borehole opening reaches a preset distance, the distance limiting mechanism can make the support claws 301 extend outward and press against the borehole wall, and the support cylinder 302 separates from the adjacent support cylinder 302.

[0026] The beneficial effects of the directional drilling equipment for horizontal curtain wall construction provided in this embodiment are as follows: Compared with the prior art, the directional drilling equipment for horizontal curtain wall construction provided in this embodiment achieves circumferential fixation by the limiting claw 103 pressing against the hole wall, while sliding axially and cooperating with the limiting cylinder 102, so that the support mechanism 3 can move with the drilling rod 2 as it drills, but will not rotate with the drilling rod 2, which facilitates the separation between adjacent support cylinders 302. At the same time, the support mechanism 3 is composed of multiple detachable support cylinders 302, and the drilling rod 2 passes through the support cylinder 302. When the support cylinder 302 presses against the hole wall through the telescopic support claw 301, it can be relatively fixed relative to the drilling rod 2. The hole is fixed, and the fixed support cylinder 302 is separated from the support cylinder 302 that is not extended by the support claw 301. By fixing and separating the support cylinders 302 one by one with the drill hole, the drill rod 2 can be segmented to support it, dispersing the bending moment generated by the weight of the drill rod 2 and preventing sagging in the middle. The distance limiting mechanism can control the support cylinders 302 to be automatically fixed at a preset distance and separated from the adjacent support cylinders 302, so that the support cylinders 302 are fixed in segments along the drilling axis as the drill rod 2 extends, realizing "multi-point segmented support" for the long drill rod 2, effectively preventing the drill bit from tilting downward, ensuring the stability of the horizontal drilling direction, and improving the construction quality of the horizontal curtain.

[0027] like Figure 2 As shown, the drill bit moves forward and exits the borehole backward. The limiting claw 103 includes a limiting rod 104 and a limiting plate 105 located at the top of the limiting rod 104. The front and rear edges of the limiting plate 105 are chamfered. The outer wall of the limiting mechanism 1 has a telescopic hole extending radially along the borehole. The limiting rod 104 is slidably inserted into the telescopic hole, and a first spring is provided between the limiting rod 104 and the bottom of the telescopic hole.

[0028] The edges of the front and rear end faces of the limiting plate 105 are chamfered. When the limiting mechanism 1 slides along the borehole axis, the chamfer can reduce the frictional resistance between the limiting plate 105 and the inner wall of the borehole, avoid the edge of the limiting plate 105 from scratching the borehole wall due to sharp edges, and ensure that the limiting mechanism 1 can be smoothly advanced with the drill rod 2 without affecting the drilling efficiency.

[0029] Meanwhile, the chamfered design can reduce local compression damage to the borehole wall, protect the integrity of the borehole inner wall, and provide a stable borehole wall foundation for subsequent horizontal curtain construction.

[0030] The first spring between the limiting rod 104 and the bottom of the telescopic hole provides elastic preload to the limiting claw 103, ensuring that the limiting plate 105 always tightly abuts against the inner wall of the borehole. When the inner wall of the borehole is uneven, the first spring can adaptively adjust the extension length of the limiting claw 103 through telescoping, ensuring that the limiting claw 103 of the limiting mechanism 1 always maintains stable contact with the borehole wall.

[0031] Combination Figure 2 and Figure 3 As shown, the limiting mechanism 1 is cylindrical and includes two first limiting semi-cylinders 106. The inner wall of the first limiting semi-cylinder 106 is provided with a limiting semi-groove, and the two sides of the first limiting semi-cylinder 106 are provided with connecting ears 109 extending radially outward. When the two first limiting semi-cylinders 106 are fastened together, the limiting semi-groove is assembled into a ring-shaped limiting groove 108, and the two opposite connecting ears 109 are connected by bolts. The limiting cylinder 102 includes two second limiting semi-cylinders 107. The outer wall of the second limiting semi-cylinder 107 is provided with a limiting semi-ring 110. When the two second limiting semi-cylinders 107 are fastened together, the two limiting semi-rings 110 are assembled into a limiting ring 111, and the limiting ring 111 is inserted into the limiting groove 108.

[0032] The limiting mechanism 1 is formed by two first limiting semi-cylinders 106 fastening together, and the limiting cylinder 102 is formed by two second limiting semi-cylinders 107 fastening together, and is fixed by connecting lugs 109 and bolts. This disassembled structure eliminates the need to insert the limiting mechanism 1 and the limiting cylinder 102 from the end of the drill rod 2, and can be directly fastened and fixed at any position on the drill rod 2. It is especially suitable for scenarios where limiting devices are added to drill rod 2 that has already partially penetrated the borehole, greatly simplifying the installation process, reducing construction interruption time, and improving construction efficiency.

[0033] After the two first limiting half-cylinders 106 are engaged, the limiting half-grooves are assembled into a complete limiting groove 108; after the two second limiting half-cylinders 107 are engaged, the limiting half-rings 110 are assembled into a complete limiting ring 111, and the limiting ring 111 is inserted into the limiting groove 108. This splicing structure ensures the relative position stability between the limiting cylinder 102 and the limiting mechanism 1, allowing the drill rod 2 to rotate relative to the limiting mechanism 1 while also driving the limiting mechanism 1 to advance along the borehole. The connecting lugs 109 of the two first limiting half-cylinders 106 are bolted together, facilitating quick installation or disassembly of the limiting mechanism 1 and the limiting cylinder 102.

[0034] like Figure 6 and Figure 9 As shown, the side wall of the support cylinder 302 is provided with a plurality of axially extending drive cavities 303. A first drive plug 304 is slidably disposed in the drive cavity 303, and the first drive plug 304 corresponds one-to-one with the support claw 301. The side wall of the support cylinder 302 is provided with a plurality of radially extending drive holes 305. The drive holes 305 are connected to one end of the drive cavity 303. A second drive plug 306 is slidably disposed in the drive hole 305. The support claw 301 is connected to the outer end of the second drive plug 306. The drive cavity 303 behind the first drive plug 304 and the drive hole 305 below the second drive plug are connected to form a sealed cavity, which is filled with hydraulic oil.

[0035] The drive chamber 303 of the support cylinder 302 is connected to the drive hole 305. The first drive plug 304 and the second drive plug 306 are linked by hydraulic oil. When the first drive plug 304 moves, the hydraulic oil can evenly transmit force to multiple second drive plugs 306, causing multiple support claws 301 on the outer wall of the support cylinder 302 to extend and retract synchronously. This synchronicity ensures that the support cylinder 302 is subjected to uniform force in the circumference, thus guaranteeing the horizontal accuracy of the drill rod 2.

[0036] In addition, the drive cavity 303 and the drive hole 305 form a closed space, which can prevent the slag and groundwater in the borehole from entering the hydraulic transmission structure, avoid hydraulic oil contamination or component corrosion, extend the service life of the support mechanism 3, reduce equipment failures during construction, and ensure the continuity of horizontal curtain wall construction.

[0037] Combination Figure 4 , Figure 5 , Figure 9 ,and Figure 10 As shown, one end of the support cylinder 302 is provided with multiple locking rods 307, and a locking strip 308 is slidably provided on the locking rod 307 along the radial direction of the support cylinder 302. The locking strip 308 can extend out of the locking rod 307 or retract into the locking rod 307. The other end of the support cylinder 302 is provided with multiple locking holes 309, and a locking groove 310 is provided on one side of the locking hole 309. The locking rod 307 is inserted into the locking hole 309, and a portion of the locking strip 308 extends into the locking groove 310 to be fixed with the adjacent support cylinder 302.

[0038] The locking rod 307 at one end of the support cylinder 302 is inserted into the locking hole 309 of the adjacent support cylinder 302, and the locking strip 308 extends into the locking groove 310. This can fix multiple support cylinders 302 as a whole before the support cylinder 302 reaches the preset position, which makes it easier to push multiple support cylinders 302 into the hole simultaneously by the thrust of the drill rod 2, thereby improving construction efficiency.

[0039] When the support cylinder 302 reaches the preset position and needs to be separated, the locking bar 308 can be disengaged from the locking groove 310, realizing the rapid separation of adjacent support cylinders 302. This "lockable and separable" design ensures both the integrity of the support cylinder 302 during the propulsion process and its independence when fixed, further improving the stability of the drill pipe 2 support.

[0040] The corresponding arrangement of multiple locking rods 307 and locking holes 309 makes the connection between adjacent support cylinders 302 more uniform and firm, avoids the unexpected separation of support cylinders 302 due to the failure of a single locking point, and reduces construction risks.

[0041] like Figure 10 and Figure 11As shown, the locking rod 307 has a first sliding hole, and the locking bar 308 is slidably disposed in the first sliding hole. The length of the locking bar 308 is greater than the length of the first sliding hole. A reset groove 311 communicating with the first sliding hole is provided on one side of the first sliding hole. A reset plate 312 is provided on the locking bar 308, and the reset plate 312 is slidably disposed in the reset groove 311. A second spring 313 is provided between the reset plate 312 and the reset groove 311. The second spring 313 is configured to cause the locking bar 308 to... The pre-tightening force inside the retracting locking rod 307; multiple unlocking plates 314 are slidably provided on the support cylinder 302, each unlocking plate 314 corresponding to a locking rod 307, and the unlocking plate 314 is located inside the corresponding locking rod 307. The unlocking plate 314 can slide towards the locking bar 308 so that the locking bar 308 extends out of the outside of the locking rod 307, or the unlocking plate 314 can slide away from the locking bar 308 so that the locking bar 308 retracts into the inside of the locking rod 307.

[0042] The second spring 313 between the reset plate 312 and the reset groove 311 has a preload force that retracts the locking bar 308 to the inside of the locking rod 307. When the support cylinder 302 needs to be unlocked, the locking bar 308 can automatically retract. The bottom end of the locking bar 308 is inclined so that the unlocking plate 314 can abut against the bottom end of the locking bar 308 when it slides. Then, the unlocking plate 314 continues to slide, which can drive the unlocking bar to extend to the outside of the locking rod 307. When it is necessary to separate the adjacent support cylinder 302, the unlocking plate 314 slides away from the unlocking bar, causing the locking bar 308 to retract under the action of the second spring 313, thus achieving precise unlocking. This design ensures the connection reliability of the support cylinder 302 during the advancement process, while ensuring the timeliness of separation and preventing the drill rod 2 from sagging due to the lag in fixing the support cylinder 302.

[0043] Meanwhile, components such as locking bar 308, reset plate 312, and second spring 313 are integrated inside locking rod 307, which has a compact structure, does not occupy the external space of support cylinder 302, avoids interference with the inner wall of the borehole, and protects internal components from wear by slag and soil, thus extending service life.

[0044] Combination Figure 6 and Figure 10 As shown, the support cylinder 302 has a first groove 315 at the end near the drill bit, and the unlocking plate 314 is slidably disposed in the first groove 315 along the axial direction of the support cylinder 302. The support cylinder 302 has a second groove 316 extending along the axial direction of the support cylinder 302 at the end away from the drill bit. The second groove 316 is disposed inside the locking hole 309 and is connected to the locking hole 309. When two adjacent support cylinders 302 are locked, the first groove 315 is connected to the second groove 316, and a portion of the unlocking plate 314 is inserted into the second groove 316.

[0045] When adjacent support cylinders 302 are locked, the first slide groove 315 and the second slide groove 316 are connected, and the unlocking plate 314 is partially inserted into the second slide groove 316, so that the unlocking plate 314 of one support cylinder 302 can be linked with the unlocking structure of the adjacent support cylinder 302. When the support cylinder 302 near the orifice reaches the preset position and triggers unlocking, its unlocking plate 314 is retracted, causing the unlocking bar to retract to the inside of the locking rod 307, the adjacent support cylinders 302 are separated, the support cylinder 302 near the orifice is fixed relative to the drill hole, and the remaining support cylinders 302 continue to advance with the drill rod 2, greatly improving the separation efficiency.

[0046] It is worth noting that in this embodiment, the end face of the limiting mechanism 1 near the orifice is also provided with the same locking hole 309, locking groove 310, and second sliding groove 316 as the end of the support cylinder 302 near the orifice, so as to facilitate the connection between the limiting mechanism 1 and the foremost support cylinder 302, and to facilitate the limiting mechanism 1 to drive the support mechanism 3 forward. Because the drill rod 2 needs to pass through the fixed support cylinder 302 to continue forward, the support cylinder 302 cannot be fixed relative to the drill rod 2, so the support mechanism 3 can only move forward with the limiting mechanism 1. When adjacent support cylinders 302 separate, they cannot rotate relative to each other, so the limiting mechanism 1 is set to be fixed in the circumferential direction relative to the drill hole.

[0047] like Figure 7 and Figure 8 As shown, the first drive plug 304 and the unlocking plate 314 are connected by a first connecting rod 317. A clearance groove 318 communicating with the drive cavity 303 is provided on one side of the drive cavity 303. The first connecting rod 317 is inserted into the clearance groove 318. A sealing plate 319 is provided on the first connecting rod 317. The sealing plate 319 blocks the clearance groove 318 behind the first drive plug 304 to prevent hydraulic oil from leaking into the first slide groove 315.

[0048] The first drive piston 304 and the unlocking plate 314 are connected by a first connecting rod 317. When hydraulic oil drives the first drive piston 304 to move and extend the support claw 301, the first connecting rod 317 simultaneously drives the unlocking plate 314 to slide, realizing the synchronous action of "the support claw 301 extending outward to press against the hole wall" and "the adjacent support cylinder 302 unlocking and separating". This linkage design does not require an additional power source to control unlocking, simplifying the equipment structure. At the same time, it ensures that the support cylinder 302 separates immediately while being fixed, avoiding stress superposition caused by the support claw 301 pressing against the hole wall but the support cylinder 302 not separating, further protecting the drill pipe 2.

[0049] The sealing plate 319 blocks the clearance groove 318 behind the first drive plug 304 to prevent hydraulic oil from leaking from the clearance groove 318, ensuring hydraulic transmission efficiency. At the same time, it prevents the slag in the borehole from entering the drive chamber 303 and contaminating the hydraulic oil, extending the service life of the hydraulic system and reducing the number of equipment maintenance.

[0050] In this embodiment, a sealing groove is provided on one side of the clearance groove 318, and the sealing groove is located on the outer side of the end of the clearance groove 318 near the opening. A portion of the sealing plate 319 is always inserted into the sealing groove. The sealing groove provides clearance space for the movement of the sealing plate 319.

[0051] like Figure 6 and Figure 9 As shown, the distance limiting mechanism includes multiple distance limiting components 401. Each distance limiting component 401 includes an automatic reel 402 and a rope 403. The rear end face of the support cylinder 302 is provided with a receiving hole, and the automatic reel 402 is disposed in the receiving hole. The receiving hole is located at one end of the drive cavity 303. The automatic reel 402 is connected to the first drive plug 304 through a second connecting rod. One end of the rope 403 is connected to the automatic reel 402, and the other end of the rope 403 is connected to the adjacent support cylinder 302.

[0052] An automatic reel is located inside a support cylinder 302, and a rope 403 connects adjacent support cylinders 302. As the support cylinder 302 advances with the drill pipe 2, the rope 403 is gradually pulled out. The preset distance is the length of the rope 403. When the preset distance is reached, the rope 403 tightens, pulling the automatic reel 402, which in turn moves the first drive piston 304 via a second connecting rod, triggering the extension and unlocking of the support claw 301. This design precisely controls the fixed position of the support cylinder 302 through the length of the rope 403, avoiding errors from manual measurement, resulting in a more uniform distribution of support points and effectively counteracting the bending moment of the drill pipe 2's own weight.

[0053] In practical use, the rope 403 of the distance-limiting component 401 on the support cylinder 302 closest to the orifice of the support mechanism 3 is connected to the blowout preventer at the orifice. Specifically, the connection can be achieved by welding a connecting ring onto the blowout preventer and securing the rope 403 to the connecting lug 109; other suitable structures are also possible.

[0054] like Figure 5 As shown, the support claw 301 includes a support plate 320 and a ratchet structure 321 disposed on the support plate 320. The ratchet structure 321 extends beyond the support plate 320, and the ratchet of the ratchet structure 321 is configured to rotate in one direction when pulled out of the drill hole. The automatic winding reel 402 is slidably arranged, and a third spring 404 is provided between the automatic winding reel 402 and the bottom of the receiving hole. The third spring 404 is configured with a preload force when the support claw 301 retracts.

[0055] The ratchet structure 321 of the support claw 301 rotates in one direction when pulled out of the borehole, that is, it can only be pulled out of the borehole and cannot move inward. When drilling is in progress, the support claw 301 presses against the support cylinder 302 of the borehole wall and cannot move forward with the drilling, which facilitates the support of the borehole at a fixed distance.

[0056] When drilling is complete, as drill rod 2 retracts, limiting mechanism 1 first retracts the foremost support cylinder 302. At this time, the distance between the foremost support cylinder 302 and the adjacent support cylinder 302 is less than the length of rope 403. The third spring 404 drives the first drive plug 304 to reset, which in turn drives the second drive plug 306 to reset. At this time, support claw 301 retracts. Similarly, the support cylinder 302 closer to limiting mechanism 1 will also drive the support claw 301 of the adjacent support cylinder 302 farther away from limiting mechanism 1 to retract.

[0057] In practical use, the directional drilling equipment for horizontal curtain wall construction of the present invention is installed by first fixing the limiting mechanism 1, then sleeved on the drill rod 2 with the support cylinder 302, first pulling the support claw 301 outward to retract the unlocking plate 314, then inserting the locking rod 307 into the locking hole 309, and then pressing down the support claw 301 to insert the unlocking plate 314 into the second sliding groove 316. In the present invention, the bottom end of the locking strip 308 is arranged at an angle so that when the unlocking plate 314 is inserted into the second sliding groove 316, it can push the locking strip 308 to slide and partially lock it in the locking groove 310. The adjacent support cylinders 302 are installed in the same way. The rope 403 of the last support cylinder 302 is connected to the blowout preventer until the support cylinder 302 is completely inserted into the borehole, and then the blowout preventer is installed and fixed.

[0058] Finally, magnets are provided on the end faces of both ends of the support cylinder 302, and adjacent support cylinders 302 can be magnetically attracted and fixed together when they are close. The force that overcomes the attraction of the magnets and separates two adjacent support cylinders 302 is greater than the sum of the force that overcomes the automatic winding device 402 and pulls the rope 403 outward and the force that overcomes the third spring 404 and moves the first drive plug 304. Therefore, in actual use, even if adjacent support cylinders 302 are unlocked, they will not separate immediately. Only when the rope 403 is fully taut and the support claw 301 extends and fixes the support cylinders 302 relative to the drilled hole will the adjacent support cylinders 302 separate.

[0059] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A directional drilling device for horizontal curtain wall construction, characterized in that, include: The limiting mechanism has a columnar inner cavity, in which a limiting cylinder is rotatably installed and fixed to the drill rod; the outer wall of the limiting mechanism is provided with multiple limiting claws, which abut against the inner wall of the borehole, so that the limiting mechanism and the borehole are fixed in the circumferential direction, and the limiting claws can also slide along the axial direction of the borehole. The support mechanism includes multiple detachably connected support cylinders, with the drill rod passing through the support cylinders. One end of the support cylinder near the limiting mechanism is detachably connected to the limiting mechanism, and multiple retractable support claws are provided on the outer wall of the support cylinder. A distance limiting mechanism is connected in series with the support cylinder and driven by the support claw of the support cylinder. One end of the distance limiting mechanism is fixedly connected to the blowout preventer at the borehole opening. If the axial distance between the support cylinder and the borehole opening reaches a preset distance, the distance limiting mechanism can make the support claw extend outward and press against the borehole wall, and the corresponding support cylinder separates from the adjacent support cylinder. The side wall of the support cylinder is provided with a plurality of axially extending drive cavities, and a first drive plug is slidably disposed in the drive cavity, the first drive plug corresponding one to one with the support claw; The side wall of the support cylinder is provided with a plurality of radially extending drive holes. The drive holes are connected to one end of the drive cavity. A second drive plug is slidably disposed in the drive hole. The support claw is connected to the outer end of the second drive plug. The drive cavity behind the first drive plug is connected to the drive hole below the second drive plug to form a sealed cavity. The sealed cavity is filled with hydraulic oil. The distance limiting mechanism includes multiple distance limiting components, each of which includes: An automatic cable reel has a receiving hole on the rear end face of the support cylinder, and the automatic cable reel is disposed in the receiving hole. The receiving hole is located at one end of the drive cavity, and the automatic cable reel is connected to the first drive plug through a second connecting rod. A rope, one end of which is connected to the automatic reel, and the other end of which is connected to the adjacent support cylinder.

2. The directional drilling equipment for horizontal curtain wall construction as described in claim 1, characterized in that: The limiting claw includes a limiting rod and a limiting plate disposed at the top of the limiting rod, wherein the front end face and the rear end face of the limiting plate are chamfered at their edges. The outer wall of the limiting mechanism is provided with a telescopic hole extending radially along the drill hole. The limiting rod is slidably inserted into the telescopic hole, and a first spring is provided between the limiting rod and the bottom of the telescopic hole.

3. The directional drilling equipment for horizontal curtain wall construction as described in claim 2, characterized in that: The limiting mechanism is cylindrical and includes two first limiting semi-cylinders. The inner wall of the first limiting semi-cylinder is provided with a limiting semi-groove, and the two sides of the first limiting semi-cylinder are provided with connecting ears that extend radially outward. When the two first limiting semi-cylinders are fastened together, the limiting semi-grooves are combined to form an annular limiting groove, and the two opposite connecting ears are connected by bolts. The limiting cylinder includes two second limiting semi-cylinders. The outer wall of the second limiting semi-cylinder is provided with a limiting semi-ring. When the two second limiting semi-cylinders are fastened together, the two limiting semi-rings are combined to form a limiting ring, which is inserted into the limiting groove.

4. The directional drilling equipment for horizontal curtain wall construction as described in claim 1, characterized in that: One end of the support cylinder is provided with a plurality of locking rods, and a locking strip is slidably provided on the locking rod along the radial direction of the support cylinder. The locking strip can extend out of the locking rod or retract into the locking rod. The other end of the support cylinder is provided with a plurality of locking holes, and a locking groove is provided on one side of the locking hole. The locking rod is inserted into the locking hole, and a portion of the locking strip extends into the locking groove to be fixed to the adjacent support cylinder.

5. The directional drilling equipment for horizontal curtain wall construction as described in claim 4, characterized in that: The locking rod is provided with a first sliding hole, and the locking strip is slidably disposed in the first sliding hole. The length of the locking strip is greater than the length of the first sliding hole. A reset groove communicating with the first sliding hole is provided on one side of the first sliding hole. A reset plate is provided on the locking bar. The reset plate is slidably disposed in the reset groove. A second spring is provided between the reset plate and the reset groove. The second spring is configured with a preload force to retract the locking bar to the inside of the locking rod. Multiple unlocking plates are slidably provided on the support cylinder. Each unlocking plate corresponds to a locking rod, and the unlocking plate is located on the inner side of the corresponding locking rod. The unlocking plate can slide toward the locking bar so that the locking bar extends out of the outer side of the locking rod, or the unlocking plate can slide away from the locking bar so that the locking bar retracts into the inner side of the locking rod.

6. The directional drilling equipment for horizontal curtain wall construction as described in claim 5, characterized in that: The support cylinder has a first groove at one end near the drill bit. The unlocking plate is slidably disposed in the first groove along the axial direction of the support cylinder. The support cylinder has a second groove at one end away from the drill bit, extending along the axial direction of the support cylinder. The second groove is disposed inside the locking hole and communicates with the locking hole. When two adjacent support cylinders are locked, the first groove communicates with the second groove, and a portion of the unlocking plate is inserted into the second groove.

7. The directional drilling equipment for horizontal curtain wall construction as described in claim 6, characterized in that: The first driving plug is connected to the unlocking plate by a first connecting rod. One side of the driving cavity is provided with a clearance groove communicating with the driving cavity, and the first connecting rod is inserted into the clearance groove. The first connecting rod is provided with a sealing plate, which blocks the clearance groove behind the first drive plug to prevent hydraulic oil from leaking into the first slide groove.

8. The directional drilling equipment for horizontal curtain wall construction as described in claim 1, characterized in that: The support claw includes a support plate and a ratchet structure disposed on the support plate. The ratchet structure extends beyond the support plate, and the ratchet of the ratchet structure is configured to rotate in one direction when pulled out of the borehole. The automatic reel is slidably arranged, and a third spring is provided between the automatic reel and the bottom of the receiving hole. The third spring is configured with a preload force to sometimes retract the support claw.

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