Efficient universal type drill rod joint square milling device

Abstract

The invention relates to an efficient universal type drill rod joint square milling device, and belongs to the technical field of square milling devices, the efficient universal type drill rod joint square milling device comprises a workbench, the workbench is provided with milling heads, the workbench is slidably provided with a fixed seat, the fixed seat slides in the horizontal direction, the number of the milling heads is multiple, and the milling heads are symmetrically arranged on the two sides of the sliding path of the fixed seat; limiting pieces and fixing sleeves used for vertically inserting and embedding the drill rod connector are arranged on the fixing base in a sliding mode, the limiting pieces and the fixing sleeves slide in the length direction of the fixing base, the height where the fixing sleeves are located is below the limiting pieces, and the limiting pieces and the fixing sleeves are alternately arranged in the length direction of the fixing base. A first hydraulic cylinder is arranged at one end of the fixing base, a second hydraulic cylinder is arranged at the other end of the fixing base, and the piston ends of the first hydraulic cylinder and the second hydraulic cylinder are arranged in the direction of the close limiting pieces.

Description

Technical Field

[0001] The present application relates to the technical field of square milling devices, and in particular to a highly efficient and universal drill pipe joint square milling device. Background Art

[0002] After the drill pipe joint is squared, its square structure can provide a point of force for wrenches or tools, which is convenient for frequent connection and disassembly of drill pipes in oil and geological drilling. When the squared joint is connected to other parts (such as joints, conversion joints, etc.), it can effectively prevent relative rotation due to the limitation of the square structure. This stable connection method can ensure that the connection between the drill pipes is tight during the drilling process and will not loosen due to the action of torque.

[0003] The traditional method of square milling drill pipe joints is to fix the drill pipe joints and then mill them one surface at a time.

[0004] In practical applications, drill pipe joints require multiple milling surfaces, and milling processing on a single surface has the defect of low efficiency. Summary of the invention

[0005] In order to improve the milling efficiency of drill rod joints, the present application provides a high-efficiency and universal drill rod joint square milling device.

[0006] The present application provides a high-efficiency universal drill pipe joint milling device adopts the following technical solution: A highly efficient and universal drill pipe joint square milling device comprises a workbench, on which a milling head is arranged, on which a fixed seat is slidably arranged, the fixed seat slides in a horizontal direction, and a plurality of milling heads are arranged symmetrically on both sides of the sliding path of the fixed seat; a limit piece and a fixed sleeve for upright insertion of the drill pipe joint are slidably arranged on the fixed seat, the limit piece and the fixed sleeve both slide in the length direction of the fixed seat, the height of the fixed sleeve is located below the limit piece, and the limit piece and the fixed sleeve are alternately arranged in the length direction of the fixed seat; a first hydraulic cylinder is arranged at one end of the fixed seat, and a second hydraulic cylinder is arranged at the other end, and the piston ends of the first hydraulic cylinder and the second hydraulic cylinder are both arranged in the direction of the limit piece approaching.

[0007] By adopting the above technical solution, the drill rod joint is vertically inserted into the fixed sleeve, and then the first hydraulic cylinder and the second hydraulic cylinder are started to squeeze all the limit members on the fixed seat toward the middle of the fixed seat. Since the limit members and the fixed sleeves are arranged alternately, all the limit members finally cooperate with each other to squeeze all the fixed sleeves into position. The fixed seat slides on the workbench, and the milling heads on both sides of the fixed seat start to work to mill all the drill rod joints on both sides at the same time. After milling once, the rotating rod joint is rotated as needed, and then the other two sides are beveled, thereby achieving the effect of improving the milling efficiency.

[0008] Optionally, a slide rail is fixed on the workbench, the length direction of the slide rail is the same as the length direction of the fixed seat, the fixed seat slides along the length direction of the slide rail, and a driving component for driving the fixed seat to move is provided on the workbench.

[0009] By adopting the above technical solution, the setting of the slide rail limits the sliding path for the sliding of the fixed seat, while ensuring the stability of the fixed seat during the sliding process, making the milling more accurate.

[0010] Optionally, the driving assembly includes a moving platform, a screw rod, a driving motor and a slider, the slider is inserted into the slide rail and slides along the length direction of the slide rail; the top surface of the moving platform is fixedly connected to the fixed seat, the bottom surface is slidably abutted against the top of the slide rail, and the slider is fixed to the bottom surface of the moving platform; the driving motor is fixed on the workbench, the output end of the driving motor is fixedly connected to one end of the screw rod, the other end of the screw rod passes through the slider, the screw rod is threadedly connected to the slider, and the length of the screw rod is set along the length direction of the slide rail.

[0011] By adopting the above technical solution, the drive motor is started, and the drive motor drives the lead screw to rotate. The lead screw and the slider are threadedly connected, but the slider is located in the slide rail and is limited by the slide rail so that the slider cannot rotate synchronously with the lead screw, and finally the slider is translated on the slide rail along the length direction of the lead screw. The slider drives the mobile platform to move, and finally the drive motor is started and the fixed seat is moved on the slide rail.

[0012] Optionally, an elastic member is provided in the fixing sleeve, the elastic member is located on the inner wall of the fixing sleeve, and the elastic member is used to improve the tightness of the drill pipe joint inserted into the fixing sleeve.

[0013] By adopting the above technical solution, when the drill rod joint is vertically inserted into the fixed sleeve, the elastic member is squeezed, and the elastic member is squeezed between the outer wall of the drill rod joint and the inner wall of the fixed sleeve to fill the gap between the two, so that the drill rod joint is more stable after being inserted into the fixed sleeve, and the drill rod joint is convenient to rotate with the rotation of the fixed sleeve.

[0014] Optionally, a first slide groove, a second slide groove and an inverted T slide groove are provided on the fixed seat along the length direction of the fixed seat, the first slide groove is located at the top of the fixed seat, the second slide groove is located on the vertical groove wall of the first slide groove, the inverted T slide groove is located at the bottom of the first slide groove, the end of the limit piece is located in the second slide groove, the bottom of the fixed sleeve is located in the inverted T slide groove, and the vertical height of the top surface of the fixed sleeve is lower than the vertical height of the bottom surface of the limit piece; a steering assembly for rotating the fixed sleeve is provided on the fixed seat.

[0015] By adopting the above technical solution, the second slide groove limits the sliding path of the limiter, the inverted T slide groove limits the sliding path of the fixed sleeve, and the position limitation of the limiter and the fixed sleeve ensures that all limiters can clamp the drill pipe joints on all fixed sleeves.

[0016] Optionally, the steering assembly includes a rack, a gear ring and a cylinder, the number of gear rings corresponding to the number of fixed sleeves, the gear ring ring is fixed on the outer wall of the fixed sleeve, and the gear ring is also located in an inverted T-groove, the rack is located in the inverted T-groove, the length of the rack is set along the length direction of the fixed seat, the rack is slidably set on the fixed seat, the cylinder is fixed on the fixed seat to push the rack closer to or away from the gear ring, the piston end of the cylinder is slidably connected to the rack and the sliding direction is along the length direction of the rack; when the rack slides along the length direction of the fixed seat, it engages with the gear ring to drive the fixed sleeve to rotate.

[0017] By adopting the above technical solution, when all drill rod joints have finished milling two sides, it is necessary to rotate all drill rod joints. At this time, the cylinder is started, and the cylinder pushes the rack to move in the direction close to the gear ring. Finally, the rack meshes with the gear ring, and then the rack is moved to synchronously rotate all fixed sleeves, that is, all drill rod joints are synchronously rotated. Since the gear ring is located in the inverted T-slot, the inverted T-slot provides a placement space for the gear ring, and also protects the gear ring and the rack to prevent metal debris from falling between the two, ensuring the smooth meshing of the gear ring and the rack. The gear ring also limits the fixed sleeve, so that the fixed sleeve cannot be separated from the inverted T-slot in the vertical direction, and they complement each other.

[0018] Optionally, the elastic member includes a rubber ring, and the rubber ring is fixed on the inner wall of the fixed sleeve.

[0019] By adopting the above technical solution, when the drill rod joint is vertically inserted into the fixed sleeve, the rubber ring is squeezed between the outer wall of the drill rod joint and the inner wall of the fixed sleeve, filling the gap between the two, making the drill rod joint more stable after being inserted into the fixed sleeve, and facilitating the drill rod joint to rotate with the fixed sleeve.

[0020] Optionally, the elastic member includes a spring and an extrusion plate, one end of the spring is fixedly connected to the inner wall of the fixed sleeve, and the other end is fixedly connected to the extrusion plate, and the side wall of the extrusion plate facing away from the spring is used to abut against the outer wall of the drill pipe joint.

[0021] By adopting the above technical solution, when the drill rod joint is vertically inserted into the fixed sleeve, the spring is squeezed, and the spring and the squeezing plate are squeezed between the outer wall of the drill rod joint and the inner wall of the fixed sleeve. The rebound force of the spring cooperates with the squeezing plate to make the drill rod joint more stable after being inserted into the fixed sleeve, so that the drill rod joint can rotate with the fixed sleeve.

[0022] Optionally, an adjustment assembly is provided on the workbench, which includes a C-shaped base, a first bolt and a second bolt. The C-shaped base is placed on the edge of the workbench and semi-wrapped around the edge of the workbench. The first bolt and the second bolt are respectively distributed on the upper and lower sides of the C-shaped base. The first bolt and the second bolt both pass through the C-shaped base and are threadedly connected to the C-shaped base. Ends of the first bolt and the second bolt both abut against the workbench. The milling head is located on the top of the C-shaped base.

[0023] By adopting the above technical solution, when milling surfaces of different heights need to be opened on the drill pipe joint, the vertical position of the C-shaped base relative to the workbench can be adjusted by rotating and adjusting the first bolt and the second bolt, thereby achieving the effect of adjusting the vertical height of the milling head.

[0024] Optionally, a plug plate is inserted and connected to the fixing seat, and the plug plate is used to block one end of the sliding path of the limiter; and a connecting piece for connecting to one end of the rack is provided on the piston end of the first hydraulic cylinder.

[0025] By adopting the above technical solution, the position of the first hydraulic cylinder is adjusted, and the piston end of the first hydraulic cylinder is connected to the rack end through a connecting piece, so that the first hydraulic cylinder is fully utilized, and the second hydraulic cylinder cooperates with the plug plate to squeeze all the limit members on the fixed seat.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The symmetrically arranged milling head cooperates with the movable fixed seat to perform two-sided milling on all drill pipe joints, which improves the milling efficiency; 2. After all the drill pipe joints have been milled on two sides, all the drill pipe joints need to be rotated. At this time, the cylinder is started, and the cylinder pushes the rack to move toward the gear ring. Finally, the rack engages with the gear ring. Then, the rack is moved to synchronously rotate all the fixed sleeves, that is, all the drill pipe joints are synchronously rotated, which is convenient for milling the remaining two sides of the drill pipe joints, and the milling efficiency is further improved; 3. The setting of the adjustment component can not only change the position of the milling head, but also cooperate with the plug plate to change the position of the first hydraulic cylinder, thereby fully utilizing the power of the first hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application from the right side perspective; Figure 2 It is a partial structural cross-sectional view of the slide rail; Figure 3 It is a schematic diagram of the overall structure of the embodiment of the present application from the left side perspective; Figure 4 yes Figure 3 The structural section view of the fixed seat is partially hidden from the perspective of the milling head; Figure 5 yes Figure 4 A partial enlarged schematic diagram of part A; Figure 6 yes Figure 4 A partial enlarged schematic diagram of part B in the middle Figure 7 It is a vertical structural cross-sectional view at the fixed seat; Figure 8 To show the difference from Figure 7 Schematic diagram of different types of elastic parts.

[0028] In the figure, 1. workbench; 11. milling head; 12. slide rail; 2. fixed seat; 21. limit member; 22. fixed sleeve; 23. first hydraulic cylinder; 24. second hydraulic cylinder; 25. first slide groove; 26. second slide groove; 27. inverted T slide groove; 3. drive assembly; 31. mobile platform; 32. screw rod; 33. drive motor; 34. slider; 4. elastic member; 41. rubber ring; 42. spring; 43. extrusion plate; 5. steering assembly; 51. rack; 52. gear ring; 53. cylinder; 6. adjustment assembly; 61. C-type base; 62. first bolt; 63. second bolt; 7. plug plate; 71. slot; 8. connector. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 8 This application is described in further detail.

[0030] The embodiment of the present application discloses a highly efficient and universal drill rod joint square milling device.

[0031] refer to Figure 1 A high-efficiency and universal drill pipe joint milling device includes a workbench 1, a slide rail 12 is fixed on the workbench 1, a fixed seat 2 is slidably arranged on the slide rail 12, a plurality of milling heads 11 are arranged on the workbench 1, the milling heads 11 are symmetrically distributed on both sides of the slide rail 12, and the drill pipe joint is inserted and limited on the fixed seat 2. With the movement of the fixed seat 2, the milling head 11 mills the two side surfaces of the drill pipe joint, and after the milling is completed, the drill pipe joint is rotated, and then the remaining two surfaces are milled, thereby improving the efficiency of the milling of the drill pipe joint.

[0032] refer to Figure 1 and Figure 2, the slide rail 12 is in the shape of a long strip. A driving assembly 3 is provided on the workbench 1, and the driving assembly 3 drives the fixed seat 2 to move on the slide rail 12. The driving assembly 3 includes a mobile platform 31, a driving motor 33, a slider 34 and a screw rod 32. The vertical cross-section of the slide rail 12 is in the shape of a concave letter. The slider 34 is located in the slide rail 12 and slides along the length direction of the slide rail 12. The mobile platform 31 slides against the top surface of the slide rail 12, the top surface of the slider 34 is fixedly connected to the bottom surface of the mobile platform 31, the screw rod 32 is located in the slide rail 12 and the screw rod 32 passes through the slider 34, the screw rod 32 is threadedly connected to the slider 34, one end of the screw rod 32 is fixedly connected to the output end of the driving motor 33, and the driving motor 33 is fixed on the workbench 1. The lengths of the mobile platform 31, the fixed seat 2 and the slide rail 12 are set in the same direction.

[0033] refer to Figure 1 and Figure 3 In this embodiment, four milling heads 11 are provided. An adjustment assembly 6 is provided on the workbench 1, a first hydraulic cylinder 23 is provided at one end of the fixed seat 2, and a second hydraulic cylinder 24 is provided at the other end of the fixed seat 2, and the piston ends of the first hydraulic cylinder 23 and the second hydraulic cylinder 24 are both facing the inside of the fixed seat 2. The body of the second hydraulic cylinder 24 is fixedly connected to the fixed seat 2. The adjustment assembly 6 includes a C-type base 61, a first bolt 62 and a second bolt 63, and the C-type base 61 is placed on the edge of the workbench 1 and is semi-wrapped to the edge of the workbench 1. The first bolt 62 and the second bolt 63 are respectively distributed on the upper and lower sides of the C-type base 61, the first bolt 62 is on the top, and the second bolt 63 is on the bottom. The first bolt 62 and the second bolt 63 both penetrate the C-type base 61 and are threadedly connected to the C-type base 61, and the ends of the first bolt 62 and the second bolt 63 are both in contact with the workbench 1; the milling head 11 is fixed on the top of the C-type base 61. The body of the first hydraulic cylinder 23 is fixed to the fixing seat 2 by conventional bolts. The vertical height of the first hydraulic cylinder 23 relative to the fixing seat 2 is adjusted by changing the position of the conventional bolts. That is, a plurality of bolt holes are spaced apart in the vertical direction on the side wall of the fixing seat 2, and conventional bolts are installed in the corresponding bolt holes.

[0034] refer to Figure 3 , Figure 4 and Figure 5 The fixed seat 2 is slidably provided with a limiter 21 and a fixed sleeve 22, and a plurality of limiters 21 and fixed sleeves 22 are provided, and both limiters 21 and fixed sleeves 22 slide along the length direction of the fixed seat 2. The limiters 21 and fixed sleeves 22 are alternately arranged along the length direction of the fixed seat 2, and the fixed sleeve 22 is arranged vertically, and the height of the top surface of the fixed sleeve 22 is lower than the height of the bottom surface of the limiter 21.

[0035] refer to Figure 5 and Figure 6The fixing seat 2 is provided with a first slide groove 25, a second slide groove 26 and an inverted T slide groove 27, and the first slide groove 25, the second slide groove 26 and the inverted T slide groove 27 are all provided along the length direction of the fixing seat 2. The first slide groove 25 is located at the top of the fixing seat 2, and the second slide groove 26 is located on the vertical groove wall of the first slide groove 25. In this embodiment, the second slide groove 26 is provided on both vertical groove walls of the first slide groove 25. The inverted T slide groove 27 is located at the bottom of the first slide groove 25. The end of the stopper 21 is located in the second slide groove 26, and the bottom of the fixing sleeve 22 is located in the inverted T slide groove 27.

[0036] refer to Figure 7 and Figure 8 , an elastic member 4 is arranged in the fixed sleeve 22, and the elastic member 4 is located inside the fixed sleeve 22. The elastic member 4 can be a rubber ring 41. After the drill rod joint is vertically inserted into the fixed sleeve 22, the rubber ring 41 is squeezed. At this time, the rubber ring 41 is located between the outer wall of the drill rod joint and the inner wall of the fixed sleeve 22, which has a stabilizing effect on the posture of the drill rod joint. The elastic member 4 can also be a combination of a spring 42 and a squeeze plate 43. One end of the spring 42 is fixedly connected to the inner wall of the fixed sleeve 22, and the other end of the spring 42 is fixedly connected to the squeeze plate 43. After the drill rod joint is vertically inserted into the fixed sleeve 22, the spring 42 is squeezed, and the side wall of the squeeze plate 43 facing away from the spring 42 abuts against the outer wall of the drill rod joint. The rebound force of the spring 42 pushes the squeeze plate 43 to position the drill rod joint. The setting of the elastic member 4 enables the positioning sleeve to drive the drill rod joint to rotate synchronously when rotating.

[0037] refer to Figure 4 , Figure 5 and Figure 6 , a steering assembly 5 is arranged on the fixed seat 2, and the steering assembly 5 drives all the fixed sleeves 22 to rotate synchronously. The rotating assembly includes a rack 51, a ring gear 52 and a cylinder 53. The number of the ring gear 52 corresponds to the number of the fixed sleeves 22. The ring gear 52 is fixed on the outer wall of the fixed sleeve 22, and the ring gear 52 is located in the inverted T-shaped groove 27 at the same time. The rack 51 is located in the inverted T-shaped groove 27. The length of the rack 51 is arranged along the length direction of the fixed seat 2. The rack 51 is slidably arranged on the fixed seat 2. The cylinder 53 is fixed on the outer wall of the fixed seat 2. The piston end of the cylinder 53 penetrates into the inverted T-shaped groove 27. The piston end of the cylinder 53 is slidably connected with the rack 51 and the sliding direction is along the length direction of the rack 51. The cylinder 53 pushes the rack 51 to approach or move away from the ring gear 52.

[0038] refer to Figure 1 , Figure 4 and Figure 6, a slot 71 is provided on the top of the fixed seat 2, and the slot 71 is provided in the vertical direction. A plug plate 7 is inserted and connected to the fixed seat 2, and the edge of the plug plate 7 is inserted in the slot 71. The plug plate 7 blocks the end of the fixed seat 2 close to the first hydraulic cylinder 23. A connecting member 8 is provided on the piston end of the first hydraulic cylinder 23. The connecting member 8 can be a latch or a U-shaped bolt. One end of the connecting member 8 is connected to the piston end of the first hydraulic cylinder 23, and the other end is connected to one end of the rack 51. The position of the first hydraulic cylinder 23 is adjusted by the adjustment component 6, and the first hydraulic cylinder 23 is started. The first hydraulic cylinder 23 drives the rack 51 to move through the connecting member 8, and the rack 51 starts to slide along the length direction of the fixed seat 2. Before the rack 51 is about to slide along the length direction of the fixed seat 2, the cylinder 53 pushes the rack 51 to move, and the rack 51 is in a meshing state with the gear ring 52.

[0039] The implementation principle of the high-efficiency universal drill pipe joint milling device of the embodiment of the present application is as follows: the drill pipe joint is vertically inserted into the fixed sleeve 22, the plug plate 7 is inserted into the slot 71, the second hydraulic cylinder 24 is started to squeeze the limiter 21, and the limiter 21 and the fixed sleeve 22 slide on the fixed seat 2 until they are squeezed and compacted. The position of the milling head 11 is adjusted by the adjustment component 6, the drive motor 33 is started, the mobile platform 31 starts to move on the slide rail 12, and the milling head 11 is started synchronously. The operation of the milling head 11 is the prior art and no other description is made. The milling head 11 mills the two sides of the drill pipe joint. After the milling is completed, the cylinder 53 is started, the rack 51 is meshed with the gear ring 52, and the first hydraulic cylinder 23 is started to rotate all the drill pipe joints, and then the drive motor 33 is started again to make the mobile platform 31 start to slide in the opposite direction. The milling head 11 mills the other two sides of the drill pipe joint, thereby achieving the effect of improving the milling efficiency.

[0040] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An efficient and universal drill pipe joint milling device, comprising a workbench (1), on which a milling head (11) is arranged, characterized in that: A fixed seat (2) is slidably arranged on the workbench (1), and the fixed seat (2) slides in a horizontal direction. The milling head (11) is provided with a plurality of fixed seats (21) and is symmetrically arranged on both sides of the sliding path of the fixed seat (2). A limiting member (21) and a fixed sleeve (22) for vertical insertion of a drill pipe joint are slidably arranged on the fixed seat (2). The limiting member (21) and the fixed sleeve (22) both slide in the length direction of the fixed seat (2). The height of the fixed sleeve (22) is located below the limiting member (21). The limiting member (21) and the fixed sleeve (22) are alternately arranged in the length direction of the fixed seat (2). A first hydraulic cylinder (23) is arranged at one end of the fixed seat (2), and a second hydraulic cylinder (24) is arranged at the other end. The piston ends of the first hydraulic cylinder (23) and the second hydraulic cylinder (24) are both arranged in the direction of the limiting member (21) to which they are close.

2. The high-efficiency universal drill rod joint square milling device according to claim 1, characterized in that: A slide rail (12) is fixed on the workbench (1), the length direction of the slide rail (12) is the same as the length direction of the fixed seat (2), the fixed seat (2) slides along the length direction of the slide rail (12), and a driving component (3) for driving the fixed seat (2) to move is arranged on the workbench (1).

3. The high-efficiency universal drill rod joint square milling device according to claim 2, characterized in that: The driving assembly (3) comprises a moving platform (31), a screw rod (32), a driving motor (33) and a slider (34); the slider (34) is inserted into the slide rail (12) and slides along the length direction of the slide rail (12); the top surface of the moving platform (31) is fixedly connected to the fixed seat (2), the bottom surface is slidably abutted against the top of the slide rail (12), and the slider (34) is fixed to the bottom surface of the moving platform (31); the driving motor (33) is fixed to the workbench (1), the output end of the driving motor (33) is fixedly connected to one end of the screw rod (32), the other end of the screw rod (32) passes through the slider (34), the screw rod (32) is threadedly connected to the slider (34), and the length of the screw rod (32) is set along the length direction of the slide rail (12).

4. The high-efficiency universal drill rod joint square milling device according to claim 1, characterized in that: An elastic member (4) is disposed in the fixed sleeve (22); the elastic member (4) is located on the inner wall of the fixed sleeve (22); the elastic member (4) is used to increase the tightness of the drill pipe joint inserted into the fixed sleeve (22).

5. The high-efficiency universal drill rod joint square milling device according to claim 4, characterized in that: The fixed seat (2) is provided with a first slide groove (25), a second slide groove (26) and an inverted T slide groove (27) along the length direction of the fixed seat (2); the first slide groove (25) is located at the top of the fixed seat (2); the second slide groove (26) is located on the vertical groove wall of the first slide groove (25); the inverted T slide groove (27) is located at the groove bottom of the first slide groove (25); the end of the limiting member (21) is located in the second slide groove (26); the bottom of the fixed sleeve (22) is located in the inverted T slide groove (27); the vertical height of the top surface of the fixed sleeve (22) is lower than the vertical height of the bottom surface of the limiting member (21); and the fixed seat (2) is provided with a steering assembly (5) for rotating the fixed sleeve (22).

6. The high-efficiency universal drill rod joint square milling device according to claim 5, characterized in that: The steering assembly (5) comprises a rack (51), a gear ring (52) and a cylinder (53). The number of gear rings (52) corresponds to the number of fixed sleeves (22). The gear rings (52) are fixed on the outer wall of the fixed sleeve (22) by an annular sleeve, and the gear rings (52) are simultaneously located in an inverted T-shaped slide groove (27). The rack (51) is located in the inverted T-shaped slide groove (27). The length of the rack (51) is arranged along the length direction of the fixed seat (2). The rack (51) is slidably arranged on the fixed seat (2). The cylinder (53) is fixed on the fixed seat (2) and is used to push the rack (51) toward or away from the gear ring (52). The piston end of the cylinder (53) is slidably connected to the rack (51) and the sliding direction is along the length direction of the rack (51). When the rack (51) slides along the length direction of the fixed seat (2), it meshes with the gear ring (52) and is used to drive the fixed sleeve (22) to rotate.

7. The high-efficiency universal drill rod joint square milling device according to claim 4, characterized in that: The elastic member (4) comprises a rubber ring (41), and the rubber ring (41) is fixed on the inner wall of the fixed sleeve (22).

8. The high-efficiency universal drill rod joint square milling device according to claim 4, characterized in that: The elastic member (4) comprises a spring (42) and an extrusion plate (43); one end of the spring (42) is fixedly connected to the inner wall of the fixed sleeve (22), and the other end is fixedly connected to the extrusion plate (43); the side wall of the extrusion plate (43) facing away from the spring (42) is used to abut against the outer wall of the drill pipe joint.

9. The high-efficiency universal drill rod joint square milling device according to claim 6, characterized in that: The workbench (1) is provided with an adjustment component (6), which comprises a C-shaped base (61), a first bolt (62) and a second bolt (63); the C-shaped base (61) is placed on the edge of the workbench (1) in a semi-wrapped shape with respect to the edge of the workbench (1); the first bolt (62) and the second bolt (63) are respectively distributed on the upper and lower sides of the C-shaped base (61); the first bolt (62) and the second bolt (63) both pass through the C-shaped base (61) and are threadedly connected to the C-shaped base (61); the ends of the first bolt (62) and the second bolt (63) both abut against the workbench (1); and the milling head (11) is located on the top of the C-shaped base (61).

10. The high-efficiency universal drill rod joint square milling device according to claim 9, characterized in that: A plug plate (7) is inserted and connected to the fixing seat (2), and the plug plate (7) is used to block one end of the sliding path of the limiter (21); and a connecting piece (8) for connecting to one end of the rack (51) is provided on the piston end of the first hydraulic cylinder (23).

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