Well drilling pipe column connector

Abstract

Relates to the field of well drilling equipment, and discloses a well drilling pipe column connector which comprises a connector connected with a well drill and a connecting device arranged at the lower end of the connector and used for fixing the connector and a drill rod. The connecting piece is adjustably arranged in the connecting rod; the fixing piece is detachably fixed on the drill rod, is connected with the connector and is used for connecting the drill rod with the connector; the limiting piece is arranged at the lower end of the connecting piece, abuts against the inner wall of the drill rod and is used for fixing the interior of the drill rod, the connector can tightly abut against the inner wall of the drill rod, loosening and falling of the connector in the drilling process are effectively reduced, the safety and stability of drilling operation are ensured, and the drilling efficiency is improved. The efficiency and the safety of drilling operation are improved, and wide market application prospects and remarkable economic benefits are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of drilling equipment, in particular to a drilling pipe column joint. Background Art

[0002] In the process of exploration and development of resources such as oil and natural gas, drilling operations are a vital link. The drilling string is the core component in the drilling operation, and the design and performance of its joints are directly related to the efficiency and safety of the drilling operation. The installation method of the pile driver drill bit in the prior art is to insert one end of the drill bit into the installation hole of the drilling machine, and then rotate the mechanism in the installation head to clamp the drill bit, so as to fix the drill bit in the installation hole.

[0003] The existing equipment has the following disadvantages: When the drill bit is drilling a hole in a relatively solid ground, the drill bit is subjected to a large torsional stress, causing the connection between the drill bit and the connector to be subjected to a large stress, increasing the risk of the drill bit and the connector falling off.

[0004] Therefore, the present application now proposes a drilling pipe joint to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a drilling pipe column joint to solve the above-mentioned problem of increasing the risk of the drill bit and the connector falling off.

[0006] To achieve the above object, the present invention provides the following technical solution: a drilling pipe column joint, comprising a connector connected to a drilling machine, and a connecting device arranged at the lower end of the connector for fixing the connector to a drill pipe:

[0007] The connecting device comprises:

[0008] A connecting rod connected to the connecting head;

[0009] A connecting piece, adjustably arranged inside the connecting rod;

[0010] A fixing member, which is detachably fixed on the drill rod and connected to the connector, and is used to connect the drill rod to the connector;

[0011] The limiting member is arranged at the lower end of the connecting member and abuts against the inner wall of the drill rod. When the connecting head drives the connecting member to rotate, the limiting member moves toward the side close to the inside of the drill rod to fix the inside of the drill rod.

[0012] Among them, the connecting head includes a fixing seat fixedly connected to the drilling machine, a mounting ring fixed at the lower end of the fixing seat and a connecting column fixed inside the mounting ring, and a fixing block is arranged at an equal angle on the outer circular end surface of the mounting ring, and the fixing piece is connected to the fixing block.

[0013] Among them, an arc-shaped moving groove is opened on the connecting rod at the position corresponding to the fixed block, and a placement groove for placing the fixed block is opened at the position of the connecting rod at the lower end of the moving groove. A fixing rod is fixed to the lower end of the connecting rod, and a connecting bearing is arranged inside the fixing rod.

[0014] Wherein, the connecting member includes a rotating rod sleeved on the connecting bearing, a top plate fixed to the upper end of the rotating rod and a first plug rod fixed to the upper end of the top plate, the first plug rod is plugged and fixed to the connecting column, and the connecting column is provided with a first plug hole for placing the first plug rod.

[0015] Among them, the lower end of the rotating rod is connected to the limiting member through a transmission member, and the transmission member includes a screw sleeve arranged at the lower end of the rotating rod and a connecting ring fixed at the lower end of the screw sleeve, and the connecting ring is connected to the limiting member, and a second plug rod is fixed to the lower end of the rotating rod, and a second plug hole for placing the second plug rod is opened at a position corresponding to the second plug rod on the screw sleeve.

[0016] Among them, the limiting member includes an abutment column placed inside the drill rod, a screw fixed at the upper end of the abutment column, a pushing ring sleeved on the abutment column and a fixing unit arranged on the abutment column and connected to the pushing ring, the screw sleeve is threadedly connected to the screw, the connecting ring is inserted into the pushing ring, a limiting plate is arranged on one side of the connecting ring located inside the pushing ring, and a sliding groove is opened on the pushing ring for the movement of the limiting plate.

[0017] Wherein, the fixing unit includes a mounting seat fixed at an equal angle on the outer circular end surface of the abutment column, a mounting frame fixed on the pushing ring, an adjusting rod rotatably arranged on the mounting frame, a limiting plate arranged on the side of the adjusting rod away from the mounting frame, and a stabilizing rod arranged between the limiting plate and the mounting seat.

[0018] Wherein, a connecting groove for placing the screw rod is opened at the lower end of the rotating rod.

[0019] Among them, the fixing part includes a fixing ring sleeved on the drill rod and a fixing plate fixed to the upper end of the fixing ring, the fixing ring is fixedly connected to the drill rod by connecting bolts, the upper end of the fixing plate is fixedly connected to the fixing block by fixing bolts, and a fixing groove for placing the fixing plate is opened at the position of the connecting rod corresponding to the fixing plate.

[0020] Among them, a plug ring is fixed on the upper end of the drill rod, and the plug ring is inserted into the inside of the fixing rod. A threaded hole for fixing the connecting bolt is opened on the drill rod, and a limiting groove for limiting the limiting plate is opened on the inner wall of the plug ring at the position corresponding to the limiting plate.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention can fix the inner and outer walls of the drill pipe at the same time by setting the device, thereby realizing a firm connection between the connector and the drill pipe. In particular, the design of the limiter can tightly abut the inner wall of the drill pipe, effectively reducing the loosening and falling off of the joint during the drilling process, ensuring the safety and stability of the drilling operation, improving the efficiency and safety of the drilling operation, and having broad market application prospects and significant economic benefits.

[0023] 2. The present invention enables the mounting frame to move up and down on the abutment column by pushing the ring, and then enables the adjusting rod to drive the limiting plate to expand outward, and then the limiting plate is fixed on the inner wall of the drill pipe and the mounting seat fixed at equal angles on the outer circular end surface of the abutment column, which can ensure the stability and uniform distribution of the entire structure on the abutment column, avoiding structural deflection or looseness caused by uneven fixation. The setting of the stabilizing rod further enhances the connection stability between the limiting plate and the mounting seat, so that the entire structure can be more stable when subjected to force, thereby improving the overall reliability and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the main structure in one embodiment of the present invention;

[0025] Figure 2 It is a schematic structural diagram of an embodiment of the present invention in a front view;

[0026] Figure 3 It is a schematic diagram of a cross-section structure in one embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of explosion in one embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the explosion bottom in one embodiment of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of a fixing base in one embodiment of the present invention;

[0030] Figure 7 It is a schematic structural diagram of a connecting rod in one embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of a connecting member in one embodiment of the present invention;

[0032] Fig. 9 It is a schematic diagram of the structure of a transmission member in one embodiment of the present invention;

[0033] Fig.10 It is a schematic structural diagram of a position-limiting member in one embodiment of the present invention;

[0034] Fig.11 It is a structural schematic diagram of a drill rod in one embodiment of the present invention;

[0035] Fig.12 It is a schematic diagram of the structure of the connection between the connecting member and the limiting member in one embodiment of the present invention;

[0036] Fig.13 It is a schematic diagram of the structure of the connection between the transmission member and the push ring in one embodiment of the present invention;

[0037] Fig.14 It is a schematic diagram of the structure of the connection between the connecting member and the fixing seat in one embodiment of the present invention;

[0038] Fig.15 It is a schematic diagram of the structure of the connection between the limiter and the plug ring in one embodiment of the present invention.

[0039] In the figure: 1, connector; 11, fixing seat; 12, mounting ring; 121, fixing block; 13, fixing bolt; 14, connecting column; 1401, first plug hole; 2, connecting device; 21, connecting rod; 2101, moving groove; 2102, placing groove; 2103, fixing groove; 22, fixing rod; 23, connecting bearing; 24, connecting member; 241, rotating rod; 24101, connecting groove; 242, top plate; 243, first plug rod; 244, second plug rod; 25, transmission member; 251 , screw sleeve; 25101, second plug hole; 252, connecting ring; 2521, limit plate; 26, limit piece; 261, abutment column; 262, screw; 263, push ring; 26301, slide groove; 264, mounting frame; 265, adjustment rod; 266, limit plate; 267, stabilizing rod; 268, mounting seat; 27, fixing piece; 271, fixing ring; 272, fixing plate; 273, connecting bolt; 3, drill rod; 301, threaded hole; 31, plug ring; 3101, limit groove. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figure 1-15The present invention provides a technical solution: a drilling pipe column joint, comprising a connector 1 connected to a drilling machine, and a connecting device 2 arranged at the lower end of the connector 1 for fixing the connector 1 to a drill pipe 3:

[0042] The connecting device 2 comprises:

[0043] A connecting rod 21 connected to the connecting head 1;

[0044] A connecting member 24, which is adjustably disposed inside the connecting rod 21;

[0045] A fixing member 27, which is detachably fixed on the drill rod 3 and connected to the connector 1, and is used to connect the drill rod 3 to the connector 1;

[0046] The limiting member 26 is disposed at the lower end of the connecting member 24 and abuts against the inner wall of the drill rod 3 . When the connecting head 1 drives the connecting member 24 to rotate, the limiting member 26 moves toward the side close to the inside of the drill rod 3 to fix the inside of the drill rod 3 .

[0047] It should be noted that, when working, the connecting rod 21 is inserted into the upper end of the drill rod 3, and then the limiter 26 is installed at the set position of the drill rod 3, and then the fixing member 27 is fixed on the drill rod 3, and the connector 1 is inserted into the upper end of the connecting rod 21, and then the connecting head 1 is rotated, so that the connecting head 1 moves downward while rotating inside the connecting rod 21, and in the process of the rotation of the connecting head 1, the connecting member 24 is driven to rotate, and then the limiter 26 connected to the lower end of the connecting member 24 is driven to expand outward, and then abutted and fixed on the inner wall of the drill rod 3, and in When the connector 1 moves down to the lowest end, the fixing piece 27 is connected to the connector 1, and then the fixing piece 27 is fixed to the connector 1. By setting up this device, the inner and outer walls of the drill pipe 3 can be fixed at the same time, thereby achieving a firm connection between the connector 1 and the drill pipe 3. In particular, the design of the limit piece 26 can tightly abut the inner wall of the drill pipe 3, effectively reducing the loosening and falling off of the joint during the drilling process, ensuring the safety and stability of the drilling operation, and improving the efficiency and safety of the drilling operation. It has broad market application prospects and significant economic benefits.

[0048] In one embodiment, the connector 1 includes a fixing seat 11 fixedly connected to the drilling machine, a mounting ring 12 fixed at the lower end of the fixing seat 11, and a connecting column 14 fixed inside the mounting ring 12. A fixing block 121 is provided at an equal angle on the outer circular end surface of the mounting ring 12, and the fixing piece 27 is connected to the fixing block 121.

[0049] This design, see Figure 6The fixing seat 11 is fixedly connected to the drilling machine, ensuring the stability and reliability between the entire connecting head 1 and the drilling machine, and preventing loosening or falling off during work. The mounting ring 12 is inserted into the interior of the connecting rod 21 and rotated during the downward movement, so that the connecting column 14 drives the connecting piece 24 connected to its lower end to rotate, and then when the fixing block 121 on the mounting ring 12 is moved down to the set position and connected to the fixing piece 27, and then the fixing piece 27 is fixedly connected to the fixing block 121. The fixing block 121 set at equal angles on the outer circular end surface of the mounting ring 12 provides a clear connection point for the fixing piece 27, making the installation and disassembly process simpler and faster. This design helps to reduce installation time, improve work efficiency, and is also more convenient when maintenance or replacement of parts is required.

[0050] In one embodiment, an arc-shaped moving groove 2101 is opened at the position of the corresponding fixed block 121 on the connecting rod 21, and a placement groove 2102 for placing the fixed block 121 is opened at the position of the connecting rod 21 at the lower end of the moving groove 2101, and a fixing rod 22 is fixed to the lower end of the connecting rod 21, and a connecting bearing 23 is arranged inside the fixing rod 22.

[0051] This design, see Figure 7 The arc-shaped moving groove 2101 opened on the connecting rod 21 allows the fixed block 121 to move along the arc path therein, so that the mounting ring 12 can rotate along the moving groove 2101 during the downward movement, and then move to the inside of the placement groove 2102. The connecting piece 24 is rotatably connected to the inside of the fixed rod 22 through the connecting bearing 23, and can drive the connecting piece 24 to rotate inside the fixed rod 22 when the connecting column 14 rotates. This design not only enhances the carrying capacity of the entire mechanical system, but also can effectively disperse and transfer the load, reducing damage or deformation caused by uneven force.

[0052] In one embodiment, the connecting member 24 includes a rotating rod 241 sleeved on the connecting bearing 23, a top plate 242 fixed to the upper end of the rotating rod 241, and a first plug rod 243 fixed to the upper end of the top plate 242. The first plug rod 243 is plugged and fixed to the connecting column 14, and a first plug hole 1401 for placing the first plug rod 243 is opened on the connecting column 14.

[0053] This design, see Figure 8When connecting the connector 1 to the connecting device 2, align the first plug hole 1401 on the connecting column 14 with the first plug rod 243 on the top plate 242, and then rotate the fixing seat 11 so that the fixing block 121 at the outer end of the mounting ring 12 is aligned with the movable groove 2101, and then rotate the fixing seat 11 so that the fixing block 121 moves down along the movable groove 2101 and rotates along the movable groove 2101, and the first plug rod 243 is gradually inserted into the first plug hole 1401, and the connecting column 14 drives the top plate 242 to rotate, and then the rotating rod 241 drives the transmission member 25 to rotate. The plug-in fixing design of the first plug rod 243 and the connecting column 14 ensures a firm connection between the connecting member 24 and the connector 1. This connection method is not only simple and convenient, but also easy to disassemble, which greatly simplifies the installation and disassembly process, improves work efficiency, and reduces maintenance costs.

[0054] In one embodiment, the lower end of the rotating rod 241 is connected to the limit member 26 through a transmission member 25. The transmission member 25 includes a screw sleeve 251 arranged at the lower end of the rotating rod 241 and a connecting ring 252 fixed at the lower end of the screw sleeve 251. The connecting ring 252 is connected to the limit member 26. A second plug rod 244 is fixed to the lower end of the rotating rod 241. A second plug hole 25101 for placing the second plug rod 244 is opened at the position of the screw sleeve 251 corresponding to the second plug rod 244.

[0055] This design, see Figure 8 ,as well as Fig. 9 When installing the connecting device 2, the second plug rod 244 at the lower end of the rotating rod 241 is inserted into the second plug hole 25101 at the upper end of the screw sleeve 251, so that the rotating rod 241 is connected to the screw sleeve 251, and the screw sleeve 251 rotates with the rotating rod 241, so that the screw sleeve 251 moves on the limit member 26, and the limit member 26 is fixed inside the drill rod 3.

[0056] In one embodiment, the limiting member 26 includes an abutment column 261 placed inside the drill rod 3, a screw 262 fixed to the upper end of the abutment column 261, a pushing ring 263 sleeved on the abutment column 261, and a fixing unit arranged on the abutment column 261 and connected to the pushing ring 263. The screw sleeve 251 is threadedly connected to the screw 262, the connecting ring 252 is inserted into the pushing ring 263, and a limiting plate 2521 is arranged on one side of the connecting ring 252 located inside the pushing ring 263. The pushing ring 263 is provided with a sliding groove 26301 for the limiting plate 2521 to move.

[0057] This design, see Figure 4-5 , Fig.10 ,as well as Fig.12The limit plate 2521 at the lower end of the connecting ring 252 is slidably connected to the slide groove 26301 in the pushing ring 263. When the rotating rod 241 drives the screw sleeve 251 to rotate, the screw sleeve 251 is threadedly connected with the screw rod 262, and then moves up and down on the screw sleeve 251. The screw sleeve 251 can be restricted in the longitudinal direction by the threaded connection between the screw sleeve 251 and the screw rod 262, which can reduce the sliding of the screw sleeve 251 on the screw rod 262 and improve the screw sleeve 251. 1 is connected to the screw rod 262, thereby improving the stability of the connection between the fixing unit and the inner wall of the drill rod 3. During the rotation of the screw rod sleeve 251, the connecting ring 252 can drive the pushing ring 263 to move up and down on the abutting column 261, so that the fixing unit connected to the pushing ring 263 is expanded outward and abutted and fixed on the inner wall of the drill rod 3. Under the restriction of the limiting plate 2521, the connecting ring 252 can drive the pushing ring 263 to move up and down with the screw rod sleeve 251.

[0058] In one embodiment, the fixing unit includes a mounting seat 268 fixed at an equal angle on the outer circular end surface of the abutment column 261, a mounting frame 264 fixed on the pushing ring 263, an adjusting rod 265 rotatably arranged on the mounting frame 264, a limiting plate 266 arranged on the side of the adjusting rod 265 away from the mounting frame 264, and a stabilizing rod 267 arranged between the limiting plate 266 and the mounting seat 268.

[0059] This design, see Fig.10 ,as well as Fig.12 , the mounting frame 264 pushes the ring 263 up and down on the abutment column 261, and then the adjusting rod 265 drives the limiting plate 266 to expand outward, and then the limiting plate 266 is fixed on the inner wall of the drill pipe 3, and the mounting seat 268 fixed at equal angles on the outer circular end surface of the abutment column 261 can ensure the stability and uniform distribution of the entire structure on the abutment column 261, avoiding structural deflection or looseness caused by uneven fixation. The setting of the stabilizing rod 267 further enhances the connection stability between the limiting plate 266 and the mounting seat 268, so that the entire structure can be more stable when subjected to force, thereby improving the overall reliability and durability.

[0060] In one embodiment, a connecting groove 24101 for accommodating the screw rod 262 is formed at the lower end of the rotating rod 241 .

[0061] This design, see Fig.13 The connecting groove 24101 provides a precise placement position for the screw rod 262 and provides movement space for the screw rod 262, which greatly simplifies the assembly process and improves work efficiency.

[0062] In one embodiment, the fixing member 27 includes a fixing ring 271 sleeved on the drill rod 3 and a fixing plate 272 fixed to the upper end of the fixing ring 271. The fixing ring 271 is fixedly connected to the drill rod 3 via a connecting bolt 273. The upper end of the fixing plate 272 is fixedly connected to the fixing block 121 via a fixing bolt 13. A fixing groove 2103 for placing the fixing plate 272 is provided at the position of the connecting rod 21 corresponding to the fixing plate 272.

[0063] This design, see Figure 5 The fixing ring 271 is tightly sleeved on the drill rod 3 and is fixedly connected to the drill rod 3 by connecting bolts 273, ensuring the stability of the fixing member 27 on the drill rod 3 and preventing loosening or falling off due to vibration or external force during use. After the fixing block 121 at the upper end of the mounting ring 12 moves down to the lowest point, it is connected to the fixing plate 272, and then the fixing block 121 and the fixing plate 272 are fixed by fixing bolts 13 to achieve the fixing of the outer side of the drill rod 3 and the connecting head 1, and when the fixing block 121 is aligned with the fixing plate 272, the rotating rod 241 drives the limiting plate 266 to abut and be fixed on the inner wall of the drill rod 3, thereby achieving the fixing of the inside of the drill rod 3 and enhancing the strength and stability of the entire structure. This design enables the drill rod 3 to maintain stable performance when subjected to large torque or pressure.

[0064] In one embodiment, an insert ring 31 is fixed to the upper end of the drill rod 3, and the insert ring 31 is inserted into the interior of the fixing rod 22. A threaded hole 301 for fixing the connecting bolt 273 is provided on the drill rod 3, and a limiting groove 3101 for limiting the limiting plate 266 is provided on the inner wall of the insert ring 31 at the position corresponding to the limiting plate 266.

[0065] This design, see Fig.11 The plug ring 31 is plugged into the interior of the fixed rod 22. This plug-in connection method is not only simple and easy, but also can provide stable support and positioning, avoiding shaking or falling off due to unstable connection. The limiting groove 3101 opened on the inner wall of the plug ring 31 matches the limiting plate 266, which effectively limits the limiting plate 266, not only preventing the limiting plate 266 from moving randomly during the operation of the drill rod 3, but also ensuring the stability and safety of the entire mechanical system. At the same time, the limiting groove 3101 also guides the limiting plate 266, so that the limiting plate 266 can move according to the predetermined trajectory.

[0066] In addition, if there are descriptions involving "first", "second", etc. in the embodiments, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying the importance of the relative description or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

Claims

1. A drilling pipe joint, comprising a connector (1) connected to a drilling machine, and a connecting device (2) arranged at the lower end of the connector (1) for fixing the connector (1) to a drill pipe (3), characterized in that: The connecting device (2) comprises: A connecting rod (21) connected to the connecting head (1); A connecting member (24) is adjustably arranged inside the connecting rod (21); A fixing member (27) is detachably fixed to the drill rod (3) and connected to the connector (1), and is used to connect the drill rod (3) to the connector (1); A limiter (26) is arranged at the lower end of the connecting member (24) and abuts against the inner wall of the drill rod (3). When the connecting head (1) drives the connecting member (24) to rotate, the limiter (26) moves toward a side close to the inside of the drill rod (3) to fix the inside of the drill rod (3).

2. The drilling pipe joint according to claim 1, characterized in that: The connector (1) comprises a fixing seat (11) fixedly connected to a drilling machine, a mounting ring (12) fixed at the lower end of the fixing seat (11), and a connecting column (14) fixed inside the mounting ring (12); a fixing block (121) is provided at an equal angle on the outer circular end surface of the mounting ring (12); and the fixing member (27) is connected to the fixing block (121).

3. The drilling pipe joint according to claim 2, characterized in that: An arc-shaped moving groove (2101) is provided on the connecting rod (21) at a position corresponding to the fixed block (121); a placement groove (2102) for placing the fixed block (121) is provided on the connecting rod (21) at a position below the moving groove (2101); a fixing rod (22) is fixed at the lower end of the connecting rod (21); and a connecting bearing (23) is provided inside the fixing rod (22).

4. The drilling pipe column joint according to claim 3, characterized in that: The connecting member (24) comprises a rotating rod (241) sleeved on the connecting bearing (23), a top plate (242) fixed to the upper end of the rotating rod (241), and a first plug rod (243) fixed to the upper end of the top plate (242), the first plug rod (243) being plugged and fixed to the connecting column (14), and the connecting column (14) is provided with a first plug hole (1401) for accommodating the first plug rod (243).

5. The drilling pipe joint according to claim 4, characterized in that: The lower end of the rotating rod (241) is connected to the limiting member (26) through a transmission member (25); the transmission member (25) comprises a screw sleeve (251) arranged at the lower end of the rotating rod (241) and a connecting ring (252) fixed to the lower end of the screw sleeve (251); the connecting ring (252) is connected to the limiting member (26); a second plug rod (244) is fixed to the lower end of the rotating rod (241); a second plug hole (25101) for placing the second plug rod (244) is provided at a position corresponding to the second plug rod (244) on the screw sleeve (251).

6. The drilling pipe joint according to claim 5, characterized in that: The limiting member (26) comprises an abutting column (261) placed inside the drill rod (3), a screw rod (262) fixed at the upper end of the abutting column (261), a pushing ring (263) sleeved on the abutting column (261), and a fixing unit arranged on the abutting column (261) and connected to the pushing ring (263); the screw rod sleeve (251) is threadedly connected to the screw rod (262); the connecting ring (252) is inserted into the pushing ring (263); a limiting plate (2521) is arranged on one side of the connecting ring (252) located inside the pushing ring (263); and a sliding groove (26301) for the limiting plate (2521) to move is opened on the pushing ring (263).

7. The drilling pipe joint according to claim 6, characterized in that: The fixing unit comprises a mounting seat (268) fixed at an equal angle on the outer circular end surface of the abutment column (261), a mounting frame (264) fixed on the pushing ring (263), an adjusting rod (265) rotatably arranged on the mounting frame (264), a limiting plate (266) arranged on a side of the adjusting rod (265) away from the mounting frame (264), and a stabilizing rod (267) arranged between the limiting plate (266) and the mounting seat (268).

8. The drilling pipe joint according to claim 6, characterized in that: The lower end of the rotating rod (241) is provided with a connecting groove (24101) for accommodating the screw rod (262).

9. The drilling pipe joint according to claim 7, characterized in that: The fixing member (27) comprises a fixing ring (271) sleeved on the drill rod (3) and a fixing plate (272) fixed to the upper end of the fixing ring (271); the fixing ring (271) is fixedly connected to the drill rod (3) via a connecting bolt (273); the upper end of the fixing plate (272) is fixedly connected to the fixing block (121) via a fixing bolt (13); and a fixing groove (2103) for placing the fixing plate (272) is provided at a position of the connecting rod (21) corresponding to the fixing plate (272).

10. The drilling pipe joint according to claim 9, characterized in that: An insert ring (31) is fixed to the upper end of the drill rod (3), and the insert ring (31) is inserted into the interior of the fixing rod (22). A threaded hole (301) for fixing the connecting bolt (273) is provided on the drill rod (3), and a limiting groove (3101) for limiting the limiting plate (266) is provided on the inner wall of the insert ring (31) at a position corresponding to the limiting plate (266).

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