Butt joint positioning structure of drill pipe

Abstract

The application provides a butt joint positioning structure of a drill pipe, which is arranged on a drill hole and is used for screwing an upstream drill pipe into a downstream drill pipe, and the butt joint positioning structure comprises screwing assemblies, clamping assemblies and a shell, the shell is installed on an upper end of the drill hole, two clamping assemblies are arranged on an upper end of the shell and face each other, one screwing assembly is installed on the other end of each clamping assembly, the clamping assemblies can drive the screwing assemblies to approach or move away from the periphery of the upstream drill pipe, and the execution ends of the two screwing assemblies can be rollingly connected to the periphery of the upstream drill pipe and drive the upstream drill pipe to rotate. The butt joint positioning structure of the drill pipe can drive the screwing assemblies to approach the upstream drill pipe through the clamping assemblies on the two sides, and the screwing assemblies rotate to drive the upstream drill pipe to rotate through rolling friction, and the threaded end of the upstream drill pipe is screwed into the upper end of the downstream drill pipe to connect the two drill pipes.

Description

Technical Field

[0001] This invention belongs to the field of drill pipe docking, and in particular relates to a drill pipe docking and positioning structure. Background Technology

[0002] Drilling operations in the coal mining industry are primarily aimed at meeting the needs of safe production, efficient mining, and system support underground. Various types of boreholes are constructed to achieve gas extraction, water exploration and drainage, pressure relief and outburst prevention, and support and anchoring. This prevents safety accidents such as gas, water hazards, and roof collapses from the source. Simultaneously, it provides working conditions for blasting coal, roadway excavation, coal seam exploration, ventilation and drainage, and grouting reinforcement, ensuring the smooth progress of coal mining processes and improving mine safety and production efficiency. During the process of drilling the pipe deeper into the borehole, multiple sections of drill pipe need to be sequentially lowered into the borehole and threaded together to form a continuous borehole support and working channel. Traditional drill pipe connection often relies on manual positioning and tightening with pipe wrenches, which is labor-intensive, time-consuming, and has poor connection accuracy, failing to meet the needs of coal mine construction. Summary of the Invention

[0003] In view of this, the present invention aims to propose a docking and positioning structure for drill pipes to solve the problems of high labor intensity, low operation efficiency and poor docking accuracy when manually docking two sections of drill pipe.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A docking and positioning structure for a drill pipe is provided. The docking and positioning structure is provided on the drill hole and is used to screw an upstream drill pipe into a downstream drill pipe. The docking and positioning structure includes a tightening component, a clamping component, and a housing. The housing is installed at the upper end of the drill hole. Two clamping components are provided at the upper end of the housing. The two clamping components are arranged opposite each other. A tightening component is installed at the other end of each clamping component. The clamping components can drive the tightening components to move closer to or away from the periphery of the upstream drill pipe. The actuating ends of the two tightening components can roll to the periphery of the upstream drill pipe and drive the upstream drill pipe to rotate.

[0006] Furthermore, the clamping assembly includes a support block, a slider, and a first hydraulic cylinder. Two support blocks are arranged opposite each other on the upper end of the housing. A first hydraulic cylinder is installed in each support block. The movable end of each first hydraulic cylinder is connected to one end of a slider. The periphery of each slider is slidably connected to a support block.

[0007] Furthermore, each tightening assembly includes a mounting frame, rollers, and a drive unit. One end of the slider is slidably connected to the middle of the mounting frame. Two rollers are rotatably arranged inside the mounting frame. The periphery of each roller can be rotatably connected to the periphery of the upstream drill pipe. A drive unit is provided at the lower end of the mounting frame, which can drive any one of the rollers to rotate.

[0008] Furthermore, the drive unit includes a rotary motor, a synchronous pulley, and a synchronous belt. The rotary motor is installed inside the mounting frame. The output shaft of the rotary motor and the periphery of the synchronous pulley are connected by a synchronous belt to form a synchronous transmission structure. The synchronous pulley is coaxially connected to the lower end of any one of the rollers.

[0009] Furthermore, each mounting bracket has a groove in the middle, and a corresponding slider is slidably connected to one end of the outer periphery in each groove. A hydraulic rod is provided on the bottom surface of each groove and the lower end of the slider. One end of the hydraulic rod is connected to the bottom surface of the groove, and the other end of the hydraulic rod is connected to the lower end of the slider.

[0010] Furthermore, a fixing component is provided inside the housing for fixing the downstream drill pipe.

[0011] Furthermore, the fixing component includes a support ring and a fixing block. The support ring is provided inside the housing. The upper end of the support ring has multiple through holes along the circumference. The lower periphery of a fixing block is slidably connected in each through hole. The upper inner side of the fixing block can abut against the periphery of the downstream drill pipe.

[0012] Furthermore, the fixing assembly also includes a second hydraulic cylinder, with one second hydraulic cylinder fixedly connected to one side of each fixing block, and multiple second hydraulic cylinders are fixedly installed inside the housing.

[0013] Compared with the prior art, the drilling pipe docking and positioning structure of the present invention has the following advantages:

[0014] (1) The drilling pipe docking and positioning structure of the present invention, through the cooperation of the clamping component and the tightening component, pushes the tightening component closer to the upstream drilling pipe by the clamping components on both sides to prevent the upstream drilling pipe from shaking, and drives the upstream drilling pipe to rotate by the rolling friction force through the rotation of the tightening component, so as to screw the threaded end of the upstream drilling pipe into the upper end of the downstream drilling pipe to connect the two sections of drilling pipe, extend the overall length, and improve the working efficiency.

[0015] (2) The drilling pipe docking and positioning structure of the present invention is provided with a clamping component. The clamping component can push the tightening component closer to or away from the upstream drilling pipe. When it is close, it can fix the lower end of the upstream drilling pipe to prevent the upstream drilling pipe from shaking and ensure that the lower end of the upstream drilling pipe and the upper end of the downstream drilling pipe are stably docked.

[0016] (3) The drilling pipe docking and positioning structure of the present invention is provided with a tightening assembly. One roller shaft is driven to rotate by the driving part, and the other roller shaft is driven by the roller shaft. The rolling contact method is adopted, and the upstream drilling pipe is rotated by the rolling friction force, so as to screw the upstream drilling pipe into the downstream drilling pipe.

[0017] (4) The drilling pipe docking and positioning structure of the present invention flexibly connects one end of the mounting bracket and the slider through a hydraulic rod. During the process of screwing the upstream drilling pipe into the downstream drilling pipe, the tightening component can slowly descend with the upstream drilling pipe. After tightening, the tightening component is pushed back to its original position by the liquid pressure in the hydraulic rod, which is convenient to adapt to the movement trajectory of the upstream drilling pipe.

[0018] (5) The drilling pipe docking and positioning structure of the present invention ensures that the drilling pipe is centered and prevents the downstream drilling pipe from deviating during the descent process by the rolling contact between the outer periphery of the downstream drilling pipe and multiple correction rollers, and the radial position of each correction roller is the same in the borehole.

[0019] (6) The drilling pipe docking and positioning structure of the present invention is provided with an adjustment component, which can synchronously adjust the radial position of each correction roller shaft to adapt to drilling pipes of different diameters, expand the overall device's adaptability range, ensure that drilling pipes of different diameters are always in the center of the borehole, and prevent the drilling pipe from deviating and getting stuck during the descent process.

[0020] (7) The drilling pipe docking and positioning structure of the present invention achieves synchronous radial adjustment of multiple correction roller shafts through handwheel and multi-stage gear transmission, ensuring that multiple correction roller shafts can move synchronously and equidistantly, and the adjustment process is smooth and convenient, and is suitable for correction of drilling pipes of different specifications.

[0021] (8) The drilling pipe docking and positioning structure of the present invention can improve the connection stability between the shell and the borehole, avoid the shell from shifting or shaking during docking and correction, and improve the positioning accuracy of drilling pipe docking and drilling pipe lowering. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is an overall schematic diagram of a drill pipe docking and positioning structure according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the tightening assembly described in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the drive unit according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the clamping assembly described in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the chute described in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the fixing component according to an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the fixing block according to an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the correction component described in an embodiment of the present invention;

[0031] Figure 9 This is a partial cross-sectional schematic diagram of the sleeve according to an embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the correction roller shaft described in an embodiment of the present invention;

[0033] Figure 11 This is a schematic diagram of the snap-fit ​​sleeve according to an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1-Upstream drill pipe; 2-Downstream drill pipe; 3-Tightening assembly; 31-Mounting bracket; 311-Slide groove; 32-Roller shaft; 33-Drive unit; 331-Rotating motor; 332-Synchronous pulley; 333-Synchronous belt; 4-Clamping assembly; 41-Support block; 42-Slider; 43-First hydraulic cylinder; 44-Hydraulic rod; 5-Housing; 51-Snap-fit ​​sleeve; 6-Fixing assembly; 61-Support ring; 611-Through hole; 62-Fixing block; 63-Second hydraulic cylinder; 7-Correction assembly; 71-Sleeve; 711-Groove; 72-Correction roller shaft frame; 73-Correction roller shaft; 8-Adjusting assembly; 81-Lead screw; 82-Splined rod; 83-Splined wheel; 84-First helical gear; 85-Second helical gear; 86-First gear; 87-Second gear; 88-Shaft; 89-Handwheel. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] like Figure 1As shown, a drill pipe docking and positioning structure includes a tightening assembly 3, a clamping assembly 4, and a housing 5. The housing 5 is installed at the upper end of the borehole, and a drill pipe channel is provided in the middle of the housing 5. The drill pipe moves within the drill pipe channel. Two clamping assemblies 4 are provided at the upper end of the housing 5, facing each other. A tightening assembly 3 is installed at the other end of each clamping assembly 4. The clamping assembly 4 can drive the tightening assembly 3 to move closer to or away from the periphery of the upstream drill pipe 1. The actuating ends of the two tightening assemblies 3 can roll to connect with the periphery of the upstream drill pipe 1 and drive the upstream drill pipe 1 to rotate. During the process of reinforcing the borehole, multiple drill pipes need to be lowered into the borehole, and... A reinforcing agent, such as concrete, is injected between the drill pipe and the borehole to fix the drill pipe inside the borehole and form a support structure. During the docking process of the upstream drill pipe 1 and the downstream drill pipe 2, the downstream drill pipe 2 needs to be fixed first, and then the upstream drill pipe 1 is hoisted above the downstream drill pipe 2. The clamping components 4 on both sides push the tightening components 3 close to the upstream drill pipe 1 to prevent the upstream drill pipe 1 from shaking. The tightening components 3 rotate, and the rolling friction drives the upstream drill pipe 1 to rotate. During the rotation, it slowly descends and screws the threaded end of the upstream drill pipe 1 into the upper end of the downstream drill pipe 2 to connect the two sections of the drill pipe, extend the overall length, and improve work efficiency.

[0041] like Figure 2 and Figure 4 As shown, the clamping assembly 4 includes a support block 41, a slider 42, and a first hydraulic cylinder 43. Two support blocks 41 are arranged opposite each other on the upper end of the housing 5. A first hydraulic cylinder 43 is installed in each support block 41. The movable end of each first hydraulic cylinder 43 is connected to one end of a slider 42. The periphery of each slider 42 is slidably connected to a support block 41. The first hydraulic cylinder 43 is existing technology, and its model is TAIYO-PARKER100H-2. When an upstream drill pipe 1 is hoisted to the downstream... When the drill pipe 2 is above the upstream drill pipe, the controller starts the external hydraulic pump and extends the first hydraulic cylinder 43. The first hydraulic cylinder 43 pushes the slider 42 to slide along the support block 41. The slider 42 drives the tightening assembly 3 to move closer to or away from the upstream drill pipe 1, completing the clamping and releasing action. A clamping assembly 4 is provided. The clamping assembly 4 can push the tightening assembly 3 closer to or away from the upstream drill pipe 1. When it moves closer, it can fix the lower end of the upstream drill pipe 1 to prevent the upstream drill pipe 1 from shaking and ensure that the lower end of the upstream drill pipe 1 and the upper end of the downstream drill pipe 2 are stably connected.

[0042] like Figure 2 and Figure 3As shown, each tightening assembly 3 includes a mounting frame 31, rollers 32, and a drive unit 33. One end of the slider 42 is slidably connected to the middle of the mounting frame 31. Two rollers 32 are rotatably arranged inside the mounting frame 31. The periphery of each roller 32 can be rolledly connected to the periphery of the upstream drill pipe 1. The drive unit 33 is arranged at the lower end of the mounting frame 31. The drive unit 33 can drive any one of the rollers 32 to rotate. The drive unit 33 includes a rotary motor 331, a synchronous pulley 332, and a synchronous belt 333. The rotary motor 331 is arranged inside the mounting frame 31. The rotary motor 331 is existing technology, and the model of the rotary motor 331 is 49TYD-500-1. The periphery of the output shaft of the rotary motor 331 and the periphery of the synchronous pulley 332 are connected by a synchronous belt 333 to form a synchronous transmission structure. The synchronous pulley 332 is coaxially connected to any one of the rollers 32. After the clamping components 4 on both sides push the tightening component 3 to clamp the lower end of the roller shaft 32, it is clamped around the outer periphery of the upstream drill pipe 1. The controller controls the output shaft of the rotating motor 331 to rotate. The output shaft drives the synchronous belt 333 to move. The synchronous belt 333 drives the synchronous pulley 332 to rotate. The synchronous pulley 332 drives the roller shaft 32 to rotate. The roller shaft 32 rolls into contact with the upstream drill pipe 1 and drives the upstream drill pipe 1 to rotate. The output shafts of the two rotating motors 331 of the two tightening components 3 rotate in the same direction to prevent the upstream drill pipe 1 from being subjected to different friction forces on both sides, which would affect the circumferential rotation. The tightening component 3 is set up so that the drive unit 33 drives one roller shaft 32 to rotate, and the other roller shaft 32 is driven. The rolling contact method is adopted. The rolling friction force drives the upstream drill pipe 1 to rotate and screws the upstream drill pipe 1 into the downstream drill pipe 2.

[0043] like Figure 5 As shown, each mounting bracket 31 has a groove 311 in the middle, and a corresponding slider 42 is slidably connected to one end of the outer periphery within each groove 311. A hydraulic rod 44 is provided on the bottom surface of each groove 311 and at the lower end of each slider 42. One end of the hydraulic rod 44 is connected to the bottom surface of the groove 311, and the other end is connected to the lower end of the slider 42. The hydraulic rod 44 is existing technology, and its model is MOBR. In the process of screwing the upstream drill pipe 1 into the downstream drill pipe 2, in addition to circumferential rotation, the vertical position of the upstream drill pipe 1 also gradually moves downward during the tightening process. The mounting frame 31, roller 32 and drive unit 33 move slowly downward, and the slider 42 moves downward in the slide groove 311. The hydraulic rod 44 is located between the bottom surface of the slide groove 311 and the lower end of the slider 42. When the slider 42 moves, the hydraulic rod 44 is compressed. After the upstream drill pipe 1 is screwed in, the tightening assembly 3 separates from the periphery of the upstream drill pipe 1. The hydraulic rod 44 pushes the slider 42 to reset through elastic force, and the mounting frame 31 and one end of the slider 42 are flexibly connected through the hydraulic rod 44. During the process of screwing the upstream drill pipe 1 into the downstream drill pipe 2, the tightening assembly 3 can slowly descend with the upstream drill pipe 1, and after tightening, the tightening assembly 3 is pushed to reset by the liquid pressure in the hydraulic rod 44, which is convenient to adapt to the movement trajectory of the upstream drill pipe 1.

[0044] like Figure 6 and Figure 7 As shown, a fixing component 6 is provided inside the housing 5. The fixing component 6 is used to fix the downstream drill pipe 2. The fixing component 6 includes a support ring 61 and a fixing block 62. The support ring 61 is provided inside the housing 5. The upper end of the support ring 61 has multiple through holes 611 along the circumference. The lower periphery of the fixing block 62 is slidably connected in each through hole 611. The upper inner side of the fixing block 62 can abut against the periphery of the downstream drill pipe 2. The fixing component 6 also includes a second hydraulic cylinder 63. A second hydraulic cylinder 63 is fixedly connected to one side of each fixing block 62. Multiple second hydraulic cylinders 63 are fixedly installed inside the housing 5. The second hydraulic cylinder 63 is existing technology. The model of the second hydraulic cylinder 63 is TAIYO-PARKER100H-2. When it is necessary to connect the next section of the upstream drill pipe 1, the controller drives the hydraulic press to control the extension of the second hydraulic cylinder 63, pushing the fixing block 62 to slide along the through hole 611 of the support ring 61. The fixing block 62 moves towards the center of the housing 5 and abuts against the outer wall of the downstream drill pipe 2, thus stably fixing the downstream drill pipe 2 inside the housing 5.

[0045] like Figure 8 As shown, a deviation correction assembly 7 is installed inside the housing 5. The deviation correction assembly 7 includes a sleeve 71, a deviation correction roller frame 72, and a deviation correction roller 73. The sleeve 71 is installed inside the housing 5. The inner ring of the sleeve 71 has multiple slots 711 along the circumferential direction. A deviation correction roller frame 72 is slidably connected to the outer periphery of each slot 711. A deviation correction roller 73 is rotatably installed inside each deviation correction roller frame 72. The outer periphery of each deviation correction roller 73 can be rollably connected to the outer periphery of the downstream drill pipe 2. The deviation correction assembly 7 can restrict the movement path of the downstream drill pipe 2. During the process of inserting the drill pipe into the borehole, in order to fill the space between the drill pipe and the borehole with solidifying agent evenly, the drill pipe should be centered in the borehole, and the distance between its outer perimeter and the inner wall of the borehole should be the same. After being fixed in this way, the drill pipe will not shift and should be vertically downward. During the downward movement of the downstream drill pipe 2, the outer perimeter of the downstream drill pipe 2 and multiple correction rollers 73 make rolling contact, and each correction roller 73 is in the same radial position in the borehole, to ensure that the drill pipe is centered and prevent the downstream drill pipe 2 from shifting during the descent.

[0046] like Figures 8-10As shown, an adjustment component 8 is also provided inside the housing 5. The adjustment component 8 is located below the correction component 7. The adjustment component 8 can adjust the position of each correction roller shaft 73 in the corresponding slot 711, thereby adjusting the radial position of the correction roller shaft 73 in the borehole. The operation of the adjustment component 8 drives the correction roller shaft frame 72 to move along the slot 711 of the sleeve 71. The correction roller shaft frame 72 drives the correction roller shaft 73 to move synchronously, changing the radial position of the correction roller shaft 73 in the borehole to adapt to different types of downstream drill pipes 2. The adjustment component 8 can synchronously adjust the radial position of each correction roller shaft 73 to adapt to drill pipes of different diameters, expanding the overall adaptability range of the device, ensuring that drill pipes of different diameters are always in the center of the borehole, and preventing the drill pipe from deviating and getting stuck during the descent process.

[0047] like Figure 9 and Figure 10 As shown, the adjusting assembly 8 includes a lead screw 81, a splined rod 82, and a splined wheel 83. One end of a lead screw 81 is rotatably connected to the outer side of each correction roller shaft bracket 72. The outer periphery of each lead screw 81 is threaded into a sleeve 71. A splined rod 82 is mounted on the other end of each lead screw 81. The inner ring of a splined wheel 83 is slidably connected to the outer periphery of each splined rod 82. The adjusting assembly 8 also includes a first helical gear 84 and a second helical gear 85. A first helical gear 84 is sleeved around the outer periphery of each splined wheel 83. Multiple first helical gears 84 mesh with second helical gears 85. The second helical gears 85 are rotatably disposed within the housing 5. The adjusting assembly 8 also includes a first gear 86, a second gear 87, a shaft 88, and a handwheel 89. A first gear 86 is fixedly sleeved around the outer periphery of the first helical gear 84. Both the first gear 86 and the second gear 87 are rotatably disposed within the housing 5, with the outer periphery of the first gear 86 meshing with the outer periphery of the second gear 87. The middle portion of the second gear 87 is coaxially connected... A handwheel 89 is installed at one end of the shaft 88 and the other end of the shaft 88. The shaft 88 is rotatably connected to the upper end of the housing 5. When it is necessary to adapt to drill pipes of different diameters, rotating the handwheel 89 drives the shaft 88 to rotate. The shaft 88 drives the second gear 87 to rotate. The second gear 87 drives the first gear 86 to rotate. The first gear 86 drives the first helical gear 84 to rotate. The first helical gear 84 drives the second helical gear 85 to rotate synchronously. The second helical gear 85 drives multiple splined wheels 83 to rotate synchronously. The splined wheels 83 drive the splined rod 82 to rotate. The splined rod 82 drives the lead screw 81 to rotate. The lead screw 81 and the sleeve 71 are threaded together to push the correction roller shaft frame 72 to move along the groove 711, realizing the synchronous adjustment of the radial position of multiple correction roller shafts 73. The synchronous radial adjustment of multiple correction roller shafts 73 is achieved by the handwheel 89 in conjunction with multi-stage gear transmission, ensuring that multiple correction roller shafts 73 can move synchronously and equidistantly. The adjustment process is smooth and convenient, and it can adapt to the correction of drill pipes of different specifications.

[0048] like Figure 11As shown, a snap-fit ​​sleeve 51 is provided at the lower end of the housing 5. The snap-fit ​​sleeve 51 can be inserted into the borehole. The snap-fit ​​sleeve 51 at the lower end of the housing 5 is directly inserted into the borehole. The snap-fit ​​sleeve 51 forms a positioning fit with the inner wall of the borehole, fixing the housing 5 as a whole at the upper opening position of the borehole. This maintains the coaxial state of the drill pipe channel inside the housing 5 and the borehole. The snap-fit ​​sleeve 51 can improve the connection stability between the housing 5 and the borehole, avoid the housing 5 from shifting or shaking during docking and correction, and improve the positioning accuracy of drill pipe docking and drill pipe lowering. In addition, the lower end of the housing 5 is fixed on the foundation. In this embodiment, the foundation is the ground at the borehole opening or the construction platform. By fixing the lower end of the housing 5 on the ground, the entire device is fixed on the ground.

[0049] The working process of a drill pipe docking and positioning structure:

[0050] 1. Device positioning

[0051] The snap-fit ​​sleeve 51 at the lower end of the housing 5 is inserted into the borehole, and the lower end of the housing 5 is fixed to the ground at the upper end of the borehole, so that the drill pipe channel inside the housing 5 is coaxial with the borehole.

[0052] 2. Correction dimension adjustment

[0053] According to the diameter of the drill pipe, turn the handwheel 89 to drive the shaft 88 and the second gear 87 to rotate. The second gear 87 drives the first gear 86, the first helical gear 84 and the second helical gear 85 to rotate. The second helical gear 85 drives multiple splined wheels 83 and splined rod 82 to rotate synchronously. The screw 81 rotates to push the correction roller shaft frame 72 to move along the groove 711, and synchronously adjusts the radial position of each correction roller shaft 73 to adapt to drill pipes of different diameters. At this time, a drill pipe is hoisted and placed into the correction assembly.

[0054] 3. Drill pipe lowering and correction

[0055] As the downstream drill pipe 2 moves downward, its outer wall rolls into contact with the correction roller shaft 73. Multiple correction roller shafts 73 with the same radial position restrict the movement path of the downstream drill pipe 2, keeping the drill pipe centered as it descends.

[0056] 4. Downstream drill pipe fixing

[0057] The second hydraulic cylinder 63 pushes the fixing block 62 to move towards the center along the through hole 611 of the support ring 61. The inner side of the fixing block 62 presses against the outer wall of the downstream drill pipe 2, and stably locks the downstream drill pipe 2 inside the housing 5 to prevent rotation or movement during docking.

[0058] 5. Upstream drill pipe clamping and positioning

[0059] The upstream drill pipe 1 is hoisted onto the upper end of the downstream drill pipe 2. The first hydraulic cylinder 43 pushes the slider 42 to slide along the support block 41. The slider 42 drives the tightening assembly 3 to approach the upstream drill pipe 1. The roller 32 presses against the outer wall of the upstream drill pipe 1 to limit the swaying of the upstream drill pipe 1 and ensure that the upstream drill pipe 1 and the downstream drill pipe 2 are aligned.

[0060] 6. Tighten and connect the drill pipe.

[0061] The rotating motor 331 operates, driving the roller shaft 32 to rotate via the synchronous belt 333 and synchronous pulley 332. The roller shaft 32 drives the upstream drill pipe 1 to rotate through rolling friction. While rotating, the upstream drill pipe 1 slowly descends, and the threaded end screws into the upper end of the downstream drill pipe 2 to complete the docking. During the screwing process, the upstream drill pipe 1 moves downward, and the mounting bracket 31 moves downward accordingly. The slider 42 slides in the slide groove 311 and compresses the hydraulic rod 44. The hydraulic rod 44 provides flexible buffering, allowing the tightening assembly 3 to adapt to the movement path of the drill pipe. After docking is completed, the hydraulic rod 44 pushes the tightening assembly 3 to reset.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drilling pipe docking and positioning structure, characterized in that: The docking positioning structure includes a tightening component (3), a clamping component (4), and a housing (5). The housing (5) is installed at the upper end of the borehole. A drill pipe channel is provided in the middle of the housing (5). Two clamping components (4) are provided at the upper end of the housing (5). The two clamping components (4) are arranged opposite each other. A tightening component (3) is installed at the other end of each clamping component (4). The clamping component (4) can drive the tightening component (3) to approach or move away from the periphery of the upstream drill pipe (1). The execution ends of the two tightening components (3) can roll to connect to the periphery of the upstream drill pipe (1) and drive the upstream drill pipe (1) to rotate.

2. The drilling pipe docking and positioning structure according to claim 1, characterized in that: The clamping assembly (4) includes a support block (41), a slider (42) and a first hydraulic cylinder (43). Two support blocks (41) are arranged opposite each other on the upper end of the housing (5). A first hydraulic cylinder (43) is installed in each support block (41). The movable end of each first hydraulic cylinder (43) is connected to one end of a slider (42). The periphery of each slider (42) is slidably connected to a support block (41).

3. The drilling pipe docking and positioning structure according to claim 2, characterized in that: Each tightening assembly (3) includes a mounting frame (31), rollers (32) and a drive unit (33). One end of the slider (42) is slidably connected to the middle of the mounting frame (31). Two rollers (32) are rotatably arranged inside the mounting frame (31). The periphery of each roller (32) can be rotatably connected to the periphery of the upstream drill pipe (1). The lower end of the mounting frame (31) is provided with a drive unit (33), which can drive any one of the rollers (32) to rotate.

4. The drilling pipe docking and positioning structure according to claim 3, characterized in that: The drive unit (33) includes a rotating motor (331), a synchronous pulley (332) and a synchronous belt (333). The rotating motor (331) is installed in the mounting frame (31). The output shaft of the rotating motor (331) and the synchronous pulley (332) are connected by a synchronous belt (333) to form a synchronous transmission structure. The synchronous pulley (332) is coaxially connected to the lower end of any roller (32).

5. The drilling pipe docking and positioning structure according to claim 3, characterized in that: Each mounting bracket (31) has a groove (311) in the middle. A corresponding slider (42) is slidably connected to one end of the outer periphery in each groove (311). A hydraulic rod (44) is provided on the bottom surface of each groove (311) and the lower end of a slider (42). One end of the hydraulic rod (44) is connected to the bottom surface of the groove (311), and the other end of the hydraulic rod (44) is connected to the lower end of the slider (42).

6. The drilling pipe docking and positioning structure according to claim 1, characterized in that: A fixing component (6) is provided inside the housing (5) for fixing the downstream drill pipe (2).

7. The drilling pipe docking and positioning structure according to claim 6, characterized in that: The fixing component (6) includes a support ring (61) and a fixing block (62). The support ring (61) is provided inside the housing (5). The upper end of the support ring (61) is provided with multiple through holes (611) along the circumferential direction. The lower periphery of a fixing block (62) is slidably connected in each through hole (611). The upper inner side of the fixing block (62) can abut against the periphery of the downstream drill pipe (2).

8. The drilling pipe docking and positioning structure according to claim 7, characterized in that: The fixing component (6) also includes a second hydraulic cylinder (63), with a second hydraulic cylinder (63) fixedly connected to one side of each fixing block (62), and multiple second hydraulic cylinders (63) are fixedly installed inside the housing (5).

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