Rotary drilling rig drill pipe

Abstract

The application discloses a rotary drilling rig drill rod, which comprises a core section rod assembly, a drill tool connecting mechanism and a plurality of section rod pipes, wherein the core section rod assembly comprises a core section rod pipe body, a puller connecting head and a traction mechanism, one end of the core section rod pipe body is connected with the puller connecting head, and the other end of the core section rod pipe body is connected with the drill tool connecting mechanism; the traction mechanism is arranged in the core section rod pipe body, one end of the traction mechanism is rotatably connected with the puller connecting head through a connecting piece, and the other end of the traction mechanism is rotatably connected with the drill tool connecting mechanism; the drill tool connecting mechanism comprises a sleeving assembly and a drill tool connecting head, and the sleeving assembly is sleeved on the core section rod pipe body. Thus, the torque force and the instantaneous tension generated on the traction mechanism when the core section rod is broken or the connection between the core section rod and the drill tool connecting head is broken can be effectively buffered, the traction mechanism is prevented from being broken, the fishing efficiency is improved, and the construction progress of the whole project is avoided from being affected.

Description

Technical Field

[0001] This application relates to the technical field of rotary drilling rigs, and more particularly to a drill rod for a rotary drilling rig. Background Technology

[0002] In the construction process of rotary drilling rigs, the drill rods need to be of varying lengths according to the construction requirements, and the length can be adjusted as needed. Multiple sections of the drill rod are nested and interlocked. Because the drill rod is subjected to combined stresses such as shearing, torsion, and compression during operation, in the construction of highways, railways, bridges, and high-rise buildings, improper operation by the operator or manufacturing defects can lead to breakage of the core section or the connection between the core section and the drill bit. This causes the drill bit to fall into the pile hole, making retrieval extremely difficult, and sometimes impossible, thus affecting the entire construction progress.

[0003] The drill rod of the relevant rotary drilling rig is pulled by a traction mechanism (steel wire rope or metal chain) inside the core section to prevent the drill bit from falling into the pile hole if the core section breaks or the connection between the core section and the drill bit breaks.

[0004] However, when the core rod breaks or the connection between the core rod and the drill bit breaks, the upper section of the core rod tube will continue to rotate at a high speed for a period of time before the breakage is detected. Therefore, it usually generates a large torsion and instantaneous tension on the traction mechanism, which can easily cause the traction mechanism to break and affect the salvage efficiency. Summary of the Invention

[0005] This application aims to at least partially address one of the technical problems in the related art.

[0006] Therefore, one objective of this application is to provide a rotary drilling rig drill rod that can effectively buffer the torque and instantaneous tension generated on the traction mechanism when the core section breaks or the connection between the core section and the drill bit joint breaks, thereby preventing the traction mechanism from breaking, improving the salvage efficiency, and avoiding affecting the construction progress of the entire project.

[0007] To achieve the above objectives, a first aspect of this application provides a rotary drilling rig drill rod, including a core section assembly, a drill string connection mechanism, and multiple section tubes. The core section assembly includes a core section tube body, a lifting device connector, and a traction mechanism. One end of the core section tube body is connected to the lifting device connector, and the other end is connected to the drill string connection mechanism. The traction mechanism is disposed within the core section tube body, and one end of the traction mechanism is rotatably connected to the lifting device connector via a connector. The other end of the traction mechanism is rotatably connected to the drill string connection mechanism; the drill string connection mechanism includes a sleeve assembly and a drill string connector, wherein the sleeve assembly is sleeved on the core section tube body, the sleeve assembly is fixedly connected to the core section tube body by a pin, and the sleeve assembly is rotatably connected to the traction mechanism; the drill string connector is disposed on the sleeve assembly; multiple sections are layered and fitted onto the core section tube body, and the multiple sections are sequentially snapped together and connected to the core section tube body by a drive key.

[0008] The rotary drilling rig drill rod of this application embodiment can effectively reduce the torque and tension generated on the traction mechanism when the core section breaks or the connection between the core section and the drill bit joint breaks, thereby preventing the traction mechanism from breaking, improving the salvage efficiency, and avoiding affecting the construction progress of the entire project.

[0009] In addition, the rotary drilling rig drill rod proposed above in this application may also have the following additional technical features:

[0010] In one embodiment of this application, the traction mechanism includes a traction rope, a chain, a D-shaped shackle, a buffer assembly, and a connecting seat. One end of the traction rope is rotatably connected to the lifting device connector via a connector, and the other end of the traction rope is detachably connected to one end of the chain, which is also detachably connected to the D-shaped shackle. The D-shaped shackle is pivotally connected to the connecting seat via the buffer assembly. The connecting seat is movably connected to the core section rod tube.

[0011] In one embodiment of this application, the buffer assembly includes a support ring and two buffer components, wherein one end of the support ring is sleeved on the D-shaped shackle, and the other end of the support ring is pivotally connected to the connecting seat; the two buffer components are symmetrically and retractably disposed within the ring wall of the support ring, and the two buffer components are respectively abutting against the D-shaped shackle.

[0012] In one embodiment of this application, the support ring has a slide rail inside its ring wall, and the buffer component includes a guide rod, a retaining ring, and a spring. The guide rod is movably disposed within the slide rail, and one end of the guide rod is in contact with the D-type shackle. The retaining ring is slidably disposed within the slide rail, close to the inner wall of the support ring and disposed on the guide rod. The spring is sleeved on the guide rod, and one end of the spring is connected to the retaining ring, while the other end of the spring is connected to the inner cavity end wall of the slide rail.

[0013] In one embodiment of this application, the sleeve assembly includes a sleeve, a boss, and a spiral claw. The sleeve is sleeved on the end of the core section rod tube, and a spiral groove is provided on the inner wall of the sleeve. The sleeve is fixedly connected to the core section rod tube by a pin. The boss is disposed inside the sleeve and is rotatably connected to the connecting seat. The spiral claw is movably disposed in the spiral groove and abuts against the core section rod tube.

[0014] In one embodiment of this application, a spline is provided on the inner wall of the core section tube, and a spline groove is provided on the outer wall of the connecting seat. The connecting seat engages with the spline through the spline groove, and a groove is provided at the bottom end of the connecting seat. Multiple slide rails are provided on the inner wall of the groove and away from the bottom wall of the groove.

[0015] In one embodiment of this application, the boss includes a support base and a support platform, wherein the support base is fixedly connected to the bottom wall of the inner cavity of the sleeve; the support platform is fixedly connected to the support base through a support column, and the periphery of the support platform is provided with a plurality of sliding grooves, and the support platform is slidably connected to the slide rail through the sliding grooves.

[0016] In one embodiment of this application, the drill rod of the rotary drilling rig further includes a plurality of ball bearings, which are rotatably disposed between the support platform and the corresponding slide rail.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of a rotary drilling rig drill rod according to an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the structure of a rotary drilling rig drill rod according to another embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the structure of a rotary drilling rig drill rod according to another embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the structure of a buffer component according to an embodiment of this application;

[0023] Figure 5 This is a partial structural schematic diagram of the drill rod of a rotary drilling rig according to an embodiment of this application;

[0024] Figure 6 This is an exploded structural diagram of a connector and a boss according to an embodiment of this application;

[0025] Figure 7 This is an exploded structural diagram of the connector and boss according to another embodiment of this application.

[0026] As shown in the figure: 10. Core rod assembly; 11. Core rod tube body; 111. Spline; 12. Lifter connector; 13. Traction mechanism; 131. Traction rope; 132. Iron chain; 133. D-type shackle; 134. Buffer assembly; 1341. Support ring; 13411. Slide rail; 1342. Buffer component; 13421. Guide rod; 13422. Retaining ring; 13423. Spring; 35. Connecting seat; 1351. Spline groove; 1352. Groove; 1353. Slide rail; 20. Drill tool connecting mechanism; 21. Sleeve assembly; 211. Sleeve; 2111. Helical groove; 212. Boss; 2121. Support seat; 2122. Support platform; 21221. Slide groove; 213. Helical chuck; 22. Drill tool connector; 30. Rod extension tube; 40. Drive key; 50. Ball bearing. Detailed Implementation

[0027] Embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. Rather, embodiments of this application include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0028] The rotary drilling rig drill rod of the present application embodiment will now be described with reference to the accompanying drawings.

[0029] The rotary drilling rig drill rod provided in this application embodiment can be applied to the construction of rotary pile holes for highways, railways, bridges, high-rise buildings, etc.

[0030] like Figures 1-3As shown in the embodiment of this application, the rotary drilling rig drill rod may include a core rod assembly 10, a drill string connection mechanism 20, and multiple rod tubes 30.

[0031] The core rod assembly 10 may include a core rod tube body 11, a hoist connector 12, and a traction mechanism 13. One end of the core rod tube body 11 is connected to the hoist connector 12, and the other end is connected to the drill string connection mechanism 20. It should be noted that the hoist connector 12 described in this embodiment is used to connect to the hoist of the rotary drilling rig (not shown in the figure).

[0032] The traction mechanism 13 is housed within the core rod body 11, with one end rotatably connected to the lifting device connector 12 via a connector, and the other end rotatably connected to the drill string connection mechanism 20. The traction mechanism 13 has a buffering function, used to pull the drill string connection mechanism in the event of breakage of the core rod body 11 or the connection between the core rod body 11 and the drill string connection mechanism 20. Simultaneously, the traction mechanism 13 can buffer the instantaneous tensile and torsional forces experienced during breakage. It should be noted that the connector described in this embodiment can be a swivel shackle.

[0033] The drill string connection mechanism 20 may include a sleeve assembly 21 and a drill string connector 22. The sleeve assembly 21 is sleeved on the core section tube body 11 and is fixedly connected to the core section tube body 11 via a pin (not specifically marked in the figure). The sleeve assembly 21 is used to hold tightly onto the core section tube body 11 when the pin breaks and the drill string connection mechanism 20 momentarily disengages from the core section tube body 11, thus buffering the traction force of the traction mechanism 13. The sleeve assembly 21 is rotatably connected to the traction mechanism 13. The drill string connector 22 is disposed on the sleeve assembly 21. It should be noted that the drill string connector 22 is used to connect a rotary drilling tool (not shown in the figure).

[0034] It should be noted that the drill bit connector 22 described in this embodiment can be connected to the sleeve assembly 21 by welding, threaded fastening or integral molding. The specific connection method can be set according to the specific situation and is not limited here.

[0035] Multiple segment tubes 30 are layered on the core segment tube body 11. For example, there may be 3, 4, 5, or 6 segment tubes 30, and the specific number is not limited here. The multiple segment tubes 30 are sequentially snapped together and connected to the core segment tube body 11 through the drive key 40.

[0036] Specifically, when the rotary drilling rig is drilling a pile hole at the location to be drilled (this location can be the construction location of rotary pile holes for highways, railways, bridges, high-rise buildings, etc.), if the core section tube 11 breaks, the traction mechanism 13 pulls the broken core section tube 11 and the drill string connection mechanism 20 connected to the core section tube 11. At the same time, since the traction mechanism 13 and the drill string connection mechanism 20 are rotatably connected.

[0037] Therefore, the torsional force generated at the moment the core rod tube 11 breaks can be converted into a force that causes the traction mechanism 13 to rotate, thereby preventing the traction mechanism 13 from being subjected to large torque and breaking. At the same time, since the traction mechanism 13 has a buffering function, it can buffer the tensile force generated at the moment the core rod tube 11 breaks, thereby effectively buffering the torsional and tensile forces generated at the moment the core rod tube 11 breaks, playing a protective role for the traction mechanism 13, preventing the traction mechanism 13 from breaking and affecting the salvage of the broken core rod tube 11 and the drill string connection mechanism 20.

[0038] When the connection between the core rod body 11 and the sleeve assembly 21 in the drill string connection mechanism 20 (which may be a broken pin) breaks (i.e., the drill string connection mechanism 20 detaches from the core rod body 11), the drill string connection mechanism 20 will also generate torque and traction force. However, since the traction mechanism 13 and the drill string connection mechanism 20 are rotatable, the torque generated by the drill string connection mechanism 20 will be converted into a force that drives the drill string connection mechanism 20 to rotate. That is, the rotation of the drill string connection mechanism 20 buffers the torque generated at the moment the drill string connection mechanism 20 detaches from the core rod body 11, avoiding the generation of torque on the traction mechanism 13 and causing the traction mechanism 13 to break.

[0039] Meanwhile, because the traction mechanism 13 has a buffering function and the sleeve assembly 21 has a clamping function when subjected to tension, when the broken drill string connection mechanism 20 generates a pulling force to detach from the core rod tube body 11, the traction mechanism 13 first buffers the generated pulling force. Secondly, during the process of the drill string connection mechanism 20 detaching from the core rod tube body 11, the sleeve assembly 21 gradually clamps onto the core rod tube body 11. The core rod tube body 11 further receives the detachment pulling force generated by the drill string connection mechanism 20 and transfers the received pulling force layer by layer to the multi-layer section tubes 30 for absorption. This prevents the traction mechanism 13 from being subjected to excessive tension and breaking, thus affecting the retrieval of the drill string connection mechanism 20. This effectively improves retrieval efficiency and avoids affecting the overall construction progress.

[0040] In one embodiment of this application, such as Figure 3 As shown, the traction mechanism 13 may include a traction rope 131, an iron chain 132, a D-type shackle 133, a buffer assembly 134, and a connecting seat 135.

[0041] In this embodiment, one end of the traction rope 131 is rotatably connected to the lifting device connector 12 via a connector (swivel shackle), and the other end of the traction rope 131 is detachably connected to one end of the iron chain 132, the other end of which is detachably connected to a D-type shackle 133. It should be noted that the traction rope 131 described in this embodiment can be a steel wire rope, and the iron chain 132 described in this embodiment can be composed of multiple chains and multiple butterfly buckles connected together.

[0042] The D-type shackle 133 is pivotally connected to the connecting seat 135 via the buffer assembly 134. The connecting seat 135 is movably connected to the core section rod tube 11.

[0043] To clearly illustrate the previous embodiment, in one embodiment of this application, as follows: Figure 4 As shown, the buffer assembly 134 may include a support ring 1341 and two buffer components 1342.

[0044] One end of the support ring 1341 is fitted onto the D-type shackle 133, and the other end of the support ring 1341 is pivotally connected to the connecting seat 135.

[0045] In this embodiment of the application, in order to prevent the inner ring wall of the support ring 1341 from being worn and subjected to hard impact, a leather pad (not specifically marked in the figure) may also be provided on the inner ring wall of the support ring 1341.

[0046] Two buffer components 1342 are symmetrically and telescopically arranged inside the ring wall of the support ring 1341, and the two buffer components 1342 are respectively connected to the D-type shackle 133.

[0047] Furthermore, in one embodiment of this application, such as Figure 4 As shown, the support ring 1341 has a slide 13411 inside the ring wall, and the buffer component 1342 may include a guide rod 13421, a retaining ring 13422 and a spring 13423.

[0048] The guide rod 13421 is movably disposed within the slide rail 13411, and one end of the guide rod 13421 is in contact with the D-type shackle 133. It should be noted that the surface on which the guide rod 13421 and the D-type shackle 133 are in contact in this embodiment is an inclined surface.

[0049] The retaining ring 13422 is slidably disposed within the slide rail 13411, and is located near the inner wall of the support ring 1341 and disposed on the guide rod 13421. It should be noted that the retaining ring 13422 described in this embodiment is fixedly connected to the guide rod 13421.

[0050] Spring 13423 is sleeved on guide rod 13421, and one end of spring 13423 is connected to retaining ring 13422, while the other end of spring 13423 is connected to the inner cavity end wall of slide rail 13411.

[0051] Specifically, when the traction mechanism 13 is subjected to tension, the support ring 1341 is pulled downwards. At this time, the D-type shackle 133 presses against the guide rod 13421. The guide rod 13421, under force, pushes the retaining ring 13422 outwards and compresses the spring 13423 until the D-type shackle 133 presses the guide rod 13421 into the slide rail 13411. Then, the D-type shackle 133 enters the inner ring at the top of the support ring 1341. That is, by setting the buffer component 1342 inside the support ring 1341, the traction of the traction mechanism 13 can be buffered, effectively preventing the traction mechanism 13 from breaking due to excessive tension and avoiding affecting the drilling progress.

[0052] As a possible approach, in order to improve the buffering effect of the buffer assembly 134, multiple sets of buffer components 1342 can be provided inside the ring wall of the support ring 1341 in the buffer assembly 134. Each set of buffer components 1342 is arranged vertically and horizontally within the ring wall of the support ring 1341, and each set of buffer components 1342 includes two buffer components 1342.

[0053] In one embodiment of this application, such as Figure 5 As shown, the socket assembly 21 may include a sleeve 211, a boss 212, and a spiral claw 213.

[0054] The sleeve 211 is fitted onto the end of the core rod tube 11. The inner wall of the sleeve 211 is provided with a spiral groove 2111, and the sleeve 211 is fixedly connected to the core rod tube 11 by a pin (not specifically marked in the figure).

[0055] The boss 212 is disposed inside the sleeve 211, and the boss 212 is rotatably connected to the connecting seat 135. The spiral claw 213 is movably disposed inside the spiral groove 2111, and the spiral claw 213 is in contact with the core section rod tube 11.

[0056] It should be noted that the boss 212 described in this embodiment can be connected to the sleeve 211 by welding or integral molding. The specific connection method can be selected according to the actual situation, and will not be elaborated on here.

[0057] Specifically, when the connection between the sleeve 211 and the core rod body 11 breaks (i.e., the pin breaks), the drill string connection mechanism 20 disengages from the core rod body 11 and moves downward along the core rod body 11. At this time, the sleeve 211 moves downward along the core rod body 11, and the spiral claw 213 abuts against the outer wall of the core rod body 11. Therefore, as the sleeve 211 moves downward along the core rod body 11, the spiral claw 213 is driven to rub against the outer wall of the core rod body 11. Under the action of friction, the spiral claw 213 is squeezed into the gap between the sleeve 211 and the core rod body 11, thereby increasing the friction between the sleeve 211 and the core rod body 11.

[0058] Therefore, when the sleeve 211 moves down a certain distance along the core rod body 11 (this distance is less than or equal to the buffer distance of the buffer assembly 134), the sleeve 211 squeezes the spiral claw 213 and clamps it onto the core rod body 11. That is, the core rod body 11 receives part of the longitudinal tensile force generated at the moment the pin breaks, thereby preventing the traction mechanism 13 from being subjected to excessive tensile force and breaking when the pin breaks, thus preventing the drill string connection mechanism 20 from disengaging from the core rod body 11. This avoids affecting the retrieval of the drill string, improves the retrieval efficiency of the drill string, and improves the construction progress of the entire project.

[0059] In one embodiment of this application, such as Figures 5-7 As shown, a spline 111 is provided on the inner wall of the core rod tube 11, and a spline groove 1351 is provided on the outer wall of the connecting seat 135. The connecting seat 135 cooperates with the spline 111 through the spline groove 1351, and a groove 1352 is provided at the bottom end of the connecting seat 135. Multiple slide rails 1353 are provided on the inner wall of the groove 1352 and on the bottom wall away from the groove 1352.

[0060] It is understandable that by providing a spline groove 1351 on the outer wall of the connecting seat 135, the connecting seat 135 can be snapped onto the inner wall of the core rod tube 11, so that the connecting seat 135 is circumferentially fixed (that is, the connecting seat 135 cannot rotate inside the core rod tube 11, but can only move longitudinally on the core rod tube 11).

[0061] To clearly illustrate the previous embodiment, in one embodiment of this application, as follows: Figure 6 and Figure 7 As shown, the boss 212 may include a support base 2121 and a support platform 2122.

[0062] Among them, the support base 2121 is fixedly connected to the bottom wall of the inner cavity of the sleeve 211, the support platform 2122 is fixedly connected to the support base 2121 through the support column, and the periphery of the support platform 2122 is provided with multiple sliding grooves 21221, and the support platform 2122 is slidably connected to the slide rail 1353 through the sliding grooves 21221.

[0063] It is understandable that by providing a sliding groove 21221 on the support platform 2122, the support platform 2122 can slide along the slide rail 1353 into the groove 1352 on the connecting seat 135. By rotating the support platform 2122 at a certain angle, the support platform 2122 can be rotatably set in the groove 1352, thereby facilitating the installation and disassembly of the boss 212 and the connecting seat 135.

[0064] Furthermore, in one embodiment of this application, such as Figure 5 As shown, the drill rod of the rotary drilling rig may also include multiple balls 50, which are rotatably disposed between the support platform 2122 and the corresponding slide rail 1353.

[0065] It is understandable that by setting ball bearings 50 between the support platform 2122 and the slide rail 1353, the rotational friction of the support platform 2122 on the slide rail 1353 can be reduced, which can help improve the service life of the support platform 2122.

[0066] In summary, the rotary drilling rig drill rod of this application embodiment can effectively buffer the torque and instantaneous tension generated on the traction mechanism when the core section breaks or the connection between the core section and the drill bit joint breaks, thereby preventing the traction mechanism from breaking, improving the salvage efficiency, and avoiding affecting the construction progress of the entire project.

[0067] In the description of this specification, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0069] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A drill rod for a rotary drilling rig, characterized in that, It includes a core rod assembly, a drill string connection mechanism, and multiple rod sections, among which, The core section rod assembly includes a core section rod tube body, a lifting device connector, and a traction mechanism, wherein... One end of the core rod tube is connected to the lifting device connector, and the other end of the core rod tube is connected to the drill string connection mechanism; The traction mechanism is disposed inside the core section tube, and one end of the traction mechanism is rotatably connected to the lifting device connector through a connector, and the other end of the traction mechanism is rotatably connected to the drill bit connection mechanism. The traction mechanism includes a D-type shackle, a buffer assembly, and a connecting seat. The D-type shackle is pivotally connected to the connecting seat via the buffer assembly. The connecting seat is movably connected to the core section tube body. The buffer assembly includes a support ring and two buffer components. One end of the support ring is fitted onto the D-shaped shackle, and the other end of the support ring is pivotally connected to the connecting seat. The two buffer components are symmetrically and telescopically arranged inside the ring wall of the support ring, and the two buffer components are respectively abutting against the D-shaped shackle. The support ring has a slide rail inside its ring wall. The buffer component includes a guide rod, a retaining ring, and a spring. The guide rod is movably disposed within the slide rail, and one end of the guide rod is in contact with the D-type shackle. The retaining ring is slidably disposed within the slide rail, close to the inner wall of the support ring and disposed on the guide rod. The spring is sleeved on the guide rod, and one end of the spring is connected to the retaining ring, while the other end of the spring is connected to the inner wall of the slide rail. When the traction mechanism is subjected to tension, the support ring is pulled down. At this time, the D-type shackle squeezes the guide rod, and the guide rod is pushed by the force to move the retaining ring outward and compress the spring. After the D-type shackle presses the guide rod into the slide, the D-type shackle enters the inner ring at the top of the support ring. By setting a buffer component in the support ring, the traction of the traction mechanism is buffered. The drill string connection mechanism includes a sleeve assembly and a drill string connector, wherein... The sleeve assembly is sleeved on the core section rod tube body. The sleeve assembly is fixedly connected to the core section rod tube body by a pin, and the sleeve assembly is rotatably connected to the traction mechanism. The sleeve assembly is used to hold the core rod body tightly when the drill bit connection mechanism instantly detaches from the core rod body after the pin breaks, thus buffering the traction force of the traction mechanism. The sleeve assembly includes a sleeve, a boss, and a spiral claw. The sleeve is sleeved on the end of the core section rod tube body, and the inner wall of the sleeve is provided with a spiral groove. The sleeve is fixedly connected to the core section rod tube body by a pin. The boss is disposed inside the sleeve and is rotatably connected to the connecting seat. The spiral claw is movably disposed in the spiral groove and abuts against the core section rod tube body. The drill bit connector is disposed on the sleeve assembly; Multiple section rod tubes are layered and fitted onto the core section rod tube body, and the multiple section rod tubes are sequentially snapped together and connected to the core section rod tube body via a drive key.

2. The rotary drilling rig drill rod according to claim 1, characterized in that, The traction mechanism also includes a traction rope and an iron chain, wherein... One end of the traction rope is rotatably connected to the lifting device connector via a connector, and the other end of the traction rope is detachably connected to one end of the iron chain, and the other end of the iron chain is detachably connected to the D-type shackle.

3. The rotary drilling rig drill rod according to claim 1, characterized in that, The inner wall of the core section tube is provided with a spline, and the outer wall of the connecting seat is provided with a spline groove. The connecting seat engages with the spline through the spline groove, and a groove is provided at the bottom end of the connecting seat. Multiple slide rails are provided on the inner wall of the groove and away from the bottom wall of the groove.

4. The rotary drilling rig drill rod according to claim 3, characterized in that, The boss includes a support base and a support platform, wherein... The support base is fixedly connected to the bottom wall of the inner cavity of the sleeve; The support platform is fixedly connected to the support base via a support column, and the periphery of the support platform is provided with multiple sliding grooves, through which the support platform is slidably connected to the slide rail.

5. The rotary drilling rig drill rod according to claim 4, characterized in that, It also includes a plurality of ball bearings, which are rotatably disposed between the support platform and the corresponding slide rail.

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