A double-direction clamping device for upsetting drill pipe

Abstract

The utility model discloses a kind of drill pipe upsetting bidirectional clamping devices, belong to drill pipe processing technical field, including workbench, the top of the workbench is provided with outer die mechanism, drill pipe tube is sleeved on the outer die mechanism, the end of the drill pipe tube is provided with ranging mechanism, the inner cavity of the drill pipe tube is sleeved with support square cylinder.In the utility model, the outside of drill pipe tube is clamped by lower extrusion die and upper extrusion die on outer die mechanism, the inside of drill pipe tube is clamped by using two inner clamping plates, when inner clamping plate is placed in the inner cavity of drill pipe tube, using first oil cylinder drives two mounting seats and four moving wheels to move outward, so that moving wheel is contacted with the inner wall of drill pipe tube, so as to use the rolling of moving wheel to drive inner clamping plate to move smoothly in the inner cavity of drill pipe tube, so as to facilitate moving inner clamping plate to the inside position of lower extrusion die and upper extrusion die to clamp in two directions, and it has good practicability.

Description

Technical Field

[0001] This utility model relates to the field of drill pipe processing technology, and more specifically, to a bidirectional clamping device for drill pipe upsetting. Background Technology

[0002] A drill pipe is a threaded steel pipe used to connect the drilling rig's surface equipment to the drilling equipment or borehole assembly located at the bottom of the well. The purpose of the drill pipe is to transport drilling mud to the drill bit and, together with the drill bit, raise, lower, or rotate the bottom hole assembly.

[0003] Upsetting is a forging process that deforms materials through axial loading, which can increase the cumulative deformation of materials and refine the microstructure. Upsetting is performed on the ends of drill pipes during machining.

[0004] A search revealed that utility model patent CN203155926U discloses a bidirectional clamping device for upsetting drill pipes, comprising an outer mold, which includes an upper outer mold and a lower outer mold. An inner expansion mold is disposed between the upper outer mold and the lower outer mold. The inner expansion mold mainly consists of an upper inner expansion mold, an lower inner expansion mold, and a hydraulic cylinder. The upper inner expansion mold and the lower inner expansion mold are driven by the hydraulic cylinder to expand outward or contract inward. One end of the hydraulic cylinder is connected to an oil pipe. The upper inner expansion mold and the lower inner expansion mold are arc-shaped. During upsetting of the pipe end, the inner and outer clamping eliminates residual shear stress on the surface, avoids stress concentration and stress corrosion during use, reduces scratches and indentations on the raw material pipe by the clamping mold, and eliminates flattening and crushing phenomena, thus ensuring better appearance and quality. It also reduces the tonnage of the clamping cylinder and the size of the equipment, saving energy and improving product performance. However, the above patent still has the following shortcomings: although the drill rod can be clamped in both directions from the inside and the outside, it is not convenient to move the inner expansion mold to a suitable position inside the drill rod, which is not very practical. At the same time, it is not convenient for the inner expansion mold and the outer mold to be aligned. Therefore, we propose a bidirectional clamping device for upsetting drill rods. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a bidirectional clamping device for drill pipe upsetting.

[0006] To solve the above problems, this utility model adopts the following technical solution: a bidirectional clamping device for upsetting drill pipes, including a worktable, an outer mold mechanism on the top of the worktable, a drill pipe sleeve on the outer mold mechanism, a distance measuring mechanism at the end of the drill pipe, a supporting square tube sleeved inside the drill pipe, a first hydraulic cylinder fixedly mounted on the supporting square tube, two output ends of the first hydraulic cylinder extending to both sides of the supporting square tube and fixedly connected to mounting seats, and two moving wheels fixedly mounted on each of the two mounting seats, two second hydraulic cylinders fixedly mounted on the supporting square tube, two output ends of the two second hydraulic cylinders extending to the outside of the supporting square tube and fixedly connected to two mounting blocks, inner clamping plates being bolted to each of the two mounting blocks, an outer sleeve fixedly connected to the end of the supporting square tube, the end of the outer sleeve extending to the outside of the drill pipe, a first oil pipe fixedly connected to the first hydraulic cylinder, and a second oil pipe fixedly connected to each of the two second hydraulic cylinders, the ends of the first oil pipe and the two second oil pipes extending through the outer sleeve to the outside of the outer sleeve.

[0007] In a preferred embodiment of this utility model, the ranging mechanism includes a mounting base disposed at the end of the drill pipe, a sliding groove disposed on the mounting base, springs fixedly connected to both ends of the inner cavity of the sliding groove, clamping plates fixedly connected to the ends of the two springs, the ends of the two clamping plates extending to the inner and outer sides of the end of the outer sleeve respectively, a sliding rod fixedly sleeved in the inner cavity of the sliding groove, the sliding rod and the clamping plates being movably sleeved, two ranging sensors fixedly sleeved on the mounting base, two display screens disposed on the mounting base, two control buttons disposed on the outer side of the mounting base, and a lithium battery disposed on the mounting base.

[0008] As a preferred embodiment of this utility model, the outer mold mechanism includes an outer lower mold base fixedly connected to the top surface of the workbench, an outer upper mold base provided at the top of the outer lower mold base, a lower mounting groove provided at the top of the outer lower mold base, a lower extrusion mold fitted inside the inner cavity of the lower mounting groove, an upper mounting groove provided at the bottom of the outer upper mold base, an upper extrusion mold fitted inside the inner cavity of the upper mounting groove, multiple screw holes provided in the inner cavities of both the upper and lower mounting grooves, multiple stepped holes provided on both the lower and upper extrusion molds, internal hexagon screws fitted inside the inner cavities of each of the multiple stepped holes, the ends of the internal hexagon screws being threaded into the inner cavities of the screw holes, external clamping grooves provided on both the upper and lower extrusion molds, and the drill pipe fitting inside the inner cavities of the two external clamping grooves.

[0009] In a preferred embodiment of this utility model, the outer side of the inner clamping plate is in contact with the inner wall of the drill pipe.

[0010] In a preferred embodiment of this utility model, the outer surface of the drill pipe is equal to the inner wall of the outer clamping groove.

[0011] In a preferred embodiment of this utility model, the lower extrusion die, the upper extrusion die, and the inner clamping plate are of equal length.

[0012] Compared with the prior art, the advantages of this utility model are: (1) In this utility model, the outer side of the drill pipe is clamped by the lower extrusion die and the upper extrusion die on the outer mold mechanism, and the inner side of the drill pipe is clamped by the two inner clamping plates. When the inner clamping plate is placed in the inner cavity of the drill pipe, the first oil cylinder drives the two mounting seats and four moving wheels to move outward, so that the moving wheels contact the inner wall of the drill pipe, so that the inner clamping plate can be smoothly moved in the inner cavity of the drill pipe by the rolling of the moving wheels, thereby conveniently moving the inner clamping plate to the inner position of the lower extrusion die and the upper extrusion die for bidirectional clamping.

[0013] (2) In this utility model, when the inner clamping plate moves in the inner cavity of the drill pipe, the clamping seat is clamped on the outside of the drill pipe by two clamping plates. Two distance measuring sensors are used to measure the distance between the upper extrusion die and the inner clamping plate respectively. The measured data is displayed on two screens. When the data measured by the two distance measuring sensors are the same, it indicates that the end of the inner clamping plate and the end of the upper extrusion die are flush. It indicates that the supporting square tube and the inner clamping plate are located inside the lower extrusion die and the upper extrusion die. This realizes the function of internal and external positioning of the inner clamping plate, the lower extrusion die and the upper extrusion die, and has good practicality. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 is a schematic cross-sectional view of the present invention.

[0016] Figure 3 is an exploded view of the outer mold mechanism of this utility model.

[0017] Figure 4 is a schematic diagram of the structure of the supporting square tube of this utility model.

[0018] Figure 5 is a cross-sectional schematic diagram of the supporting square tube of this utility model.

[0019] Figure 6 is a schematic diagram of the distance measuring mechanism of this utility model.

[0020] Figure 7 is a schematic diagram of the structure of the card holder of this utility model.

[0021] The following are the labels in the diagram: 1. Workbench; 2. Outer mold mechanism; 3. Drill pipe; 4. Distance measuring mechanism; 5. Support square tube; 6. First hydraulic cylinder; 7. Mounting base; 8. Moving wheel; 9. Second hydraulic cylinder; 10. Mounting block; 11. Inner clamping plate; 12. Outer sleeve; 13. Clamping seat; 14. Slide groove; 15. Slide rod; 16. Spring; 17. Clamping plate; 18. Distance sensor; 19. Display screen; 20. Lithium battery; 21. Control button; 22. First oil pipe; 23. Second oil pipe; 24. Lower outer mold base; 25. Upper outer mold base; 26. Lower mounting groove; 27. Upper mounting groove; 28. Lower extrusion die; 29. ​​Upper extrusion die; 30. Outer clamping groove; 31. Screw hole; 32. Stepped hole; 33. Hex socket head cap screw. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0025] As shown in Figures 1 to 7, a bidirectional clamping device for upsetting drill pipes includes a workbench 1. An outer mold mechanism 2 is mounted on the top of the workbench 1. A drill pipe tube 3 is fitted onto the outer mold mechanism 2. A distance measuring mechanism 4 is mounted at the end of the drill pipe tube 3. A supporting square tube 5 is fitted inside the drill pipe tube 3. A first hydraulic cylinder 6 is fixedly mounted on the supporting square tube 5. The two output ends of the first hydraulic cylinder 6 extend to both sides of the supporting square tube 5 and are fixedly connected to mounting seats 7. Moving wheels 8 are fixedly mounted on both mounting seats 7. Two second hydraulic cylinders 9 are fixedly mounted on the supporting square tube 5. The two output ends of the two second hydraulic cylinders 9 extend to the outside of the supporting square tube 5 and are fixedly connected to two mounting blocks 10. Inner clamping plates 11 are bolted to the two mounting blocks 10. The inner clamping plates 11 are bolted together and can be adjusted according to the inner diameter of the drill pipe tube 3. Replacement is performed. An outer sleeve 12 is fixedly connected to the end of the supporting square tube 5. The end of the outer sleeve 12 extends to the outside of the drill pipe 3. A first oil pipe 22 is fixedly connected to the first oil cylinder 6, and two second oil pipes 23 are fixedly connected to each of the two second oil cylinders 9. The ends of the first oil pipe 22 and the two second oil pipes 23 respectively penetrate the outer sleeve 12 and extend to the outside of the outer sleeve 12. The ends of the first oil pipe 22 and the two second oil pipes 23 are connected to external hydraulic equipment. The external hydraulic equipment includes a hydraulic tank, a hydraulic pump, a hydraulic motor, and an accumulator. The hydraulic pump generates high-pressure liquid to drive the first oil cylinder 6 and the second oil cylinder 9. The outer mold mechanism 2 includes an outer lower mold base 24 fixedly connected to the top surface of the workbench 1. An outer upper mold base 25 is provided on the top of the outer lower mold base 24. A connecting seat connected to the external hydraulic cylinder is provided above the outer upper mold base 25 so that the outer upper mold base 25 and the upper extrusion die 29 can be driven by the external hydraulic cylinder. The outer lower mold base 24... The upper part of the die set 25 has a lower mounting groove 26 at its top, and a lower extrusion die 28 is fitted inside the inner cavity of the lower mounting groove 26. The lower part of the upper die set 25 has an upper mounting groove 27 at its bottom, and an upper extrusion die 29 is fitted inside the inner cavity of the upper mounting groove 27. Both the upper mounting groove 27 and the lower mounting groove 26 have multiple screw holes 31 inside their inner cavities. Both the lower extrusion die 28 and the upper extrusion die 29 have multiple stepped holes 32 inside their inner cavities. Hex socket head cap screws 33 are fitted inside the inner cavities of the stepped holes 32. The ends of the hex socket head cap screws 33 are threaded into the inner cavities of the screw holes 31. Both the upper extrusion die 29 and the lower extrusion die 28 have outer clamping grooves 30. The drill pipe 3 is fitted into the inner cavities of the two outer clamping grooves 30. The lower extrusion die 28 and the upper extrusion die 29 are installed through the screw holes 31, the stepped holes 32, and the hex socket head cap screws 33. The lower extrusion die 28 can be adjusted according to the outer diameter of the drill pipe 3. Replace the upper extrusion die 29. Example 2

[0026] Based on Embodiment 1, as shown in Figures 1, 6, and 7, the ranging mechanism 4 includes a mounting base 13 disposed at the end of the drill pipe 3. A groove 14 is provided on the mounting base 13. Springs 16 are fixedly connected to both ends of the inner cavity of the groove 14. Clamping plates 17 are fixedly connected to the ends of the two springs 16, extending to the inner and outer sides of the outer sleeve 12. A sliding rod 15 is fixedly sleeved within the inner cavity of the groove 14, and the sliding rod 15 and clamping plates 17 are movably sleeved. Two ranging sensors 18 are fixedly sleeved on the mounting base 13. Two displays 19 are provided on the mounting base 13. Two control buttons 21 are provided on the outer side of the mounting base 13. A lithium battery 20 is provided on the mounting base 13. The side of the clamping plate 17 fits against the inner wall of the groove 14 to ensure the stability of the clamping plate 17 within the inner cavity of the groove 14. The lithium battery 20... The display screen 19, control button 21, and distance sensor 18 are powered by wires. The control button 21 controls the distance sensor 18 and display screen 19 via wires. The display screen 19 displays the data detected by the distance sensor 18 via wires. Example 3

[0027] Based on Embodiments 1 and 2, as shown in Figures 2 to 4, the outer side of the inner clamping plate 11 is in contact with the inner wall of the drill pipe 3, ensuring that the two inner clamping plates 11 can clamp the inner wall of the drill pipe 3 outward. The outer side of the drill pipe 3 is equal to the inner wall of the outer clamping groove 30, ensuring that the lower extrusion die 28 and the outer clamping groove 30 can clamp the outer side of the drill pipe 3. The lower extrusion die 28, the upper extrusion die 29 and the inner clamping plate 11 are of equal length, ensuring the symmetry of the clamping of the drill pipe inside and outside by the lower extrusion die 28, the upper extrusion die 29 and the inner clamping plate 11.

[0028] It should be noted that this utility model is a bidirectional clamping device for drill pipe upsetting. In use, the drill pipe 3 is first placed in the outer clamping groove 30 inside the lower extrusion die 28 and the upper extrusion die 29. An external hydraulic cylinder drives the outer upper die seat 25 and the upper extrusion die 29 downwards, using the lower extrusion die 28 and the upper extrusion die 29 to clamp and fix the outer side of the drill pipe 3. Then, the supporting square tube 5 is placed inside the drill pipe 3. At this time, an external hydraulic pump introduces oil from the first oil pipe 22 into the first oil cylinder 6. The first oil cylinder 6 drives the two mounting seats 7 to move away from each other, so that the moving wheels 8 on the two mounting seats 7 abut against the inner wall of the drill pipe 3. At this time, the outer sleeve 12 can be pushed, causing the moving wheels 8 to drive the supporting square tube 5 towards the inner cavity of the drill pipe 3. Then, the two clamping plates 17 on the clamping seat 13 are clamped on the inner and outer sides of the end of the drill pipe 3, using the spring 16... The elastic force causes the two clamping plates 17 to clamp the sides of the drill pipe 3. The control button 21 controls the two distance measuring sensors 18 to measure the distance between the upper extrusion die 29 and the inner clamping plate 11 respectively. At the same time, the measured data is displayed on the two display screens 19. Finally, when the data measured by the two distance measuring sensors 18 are the same, it means that the end of the inner clamping plate 11 is flush with the end of the upper extrusion die 29, indicating that the supporting square tube 5 and the inner clamping plate 11 are located inside the lower extrusion die 28 and the upper extrusion die 29. At this time, hydraulic oil is introduced into the two second oil cylinders 9 through the second oil pipe 23. The second oil cylinders 9 drive the two inner clamping plates 11 to move outward. The two inner clamping plates 11 support the inner wall of the drill pipe 3. The drill pipe 3 is clamped in both directions by the cooperation of the inner clamping plate 11, the lower extrusion die 28 and the upper extrusion die 29, so as to carry out the upsetting operation later.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A bidirectional clamping device for upsetting drill pipes, comprising a worktable (1), characterized in that: The top of the workbench (1) is provided with an outer mold mechanism (2), on which a drill pipe (3) is fitted. A distance measuring mechanism (4) is provided at the end of the drill pipe (3). A support square tube (5) is fitted inside the drill pipe (3). A first hydraulic cylinder (6) is fixedly installed on the support square tube (5). The two output ends of the first hydraulic cylinder (6) extend to both sides of the support square tube (5) and are fixedly connected to mounting seats (7). Each of the two mounting seats (7) is fixedly installed with a moving wheel (8). Two second hydraulic cylinders (9) are fixedly installed on the support square tube (5). The two output ends of the two second hydraulic cylinders (9) are fixedly connected to the support square tube (5). Each output end extends to the outside of the supporting square tube (5) and is fixedly connected to two mounting blocks (10). The two mounting blocks (10) are respectively equipped with inner clamping plates (11) by bolts. The end of the supporting square tube (5) is fixedly connected to an outer sleeve (12). The end of the outer sleeve (12) extends to the outside of the drill pipe (3). The first oil cylinder (6) is fixedly connected to a first oil pipe (22). The two second oil cylinders (9) are each fixedly connected to a second oil pipe (23). The ends of the first oil pipe (22) and the two second oil pipes (23) respectively pass through the outer sleeve (12) and extend to the outside of the outer sleeve (12).

2. The bidirectional clamping device for drill pipe upsetting according to claim 1, characterized in that: The ranging mechanism (4) includes a mounting base (13) provided at the end of the drill pipe (3). The mounting base (13) is provided with a groove (14). Springs (16) are fixedly connected to both ends of the inner cavity of the groove (14). Clamping plates (17) are fixedly connected to the ends of the two springs (16). The ends of the two clamping plates (17) extend to the inner and outer sides of the end of the outer sleeve (12). A sliding rod (15) is fixedly sleeved in the inner cavity of the groove (14). The sliding rod (15) and the clamping plate (17) are movably sleeved. Two ranging sensors (18) are fixedly sleeved on the mounting base (13). Two displays (19) are provided on the mounting base (13). Two control buttons (21) are provided on the outer side of the mounting base (13). A lithium battery (20) is provided on the mounting base (13).

3. The bidirectional clamping device for drill pipe upsetting according to claim 1, characterized in that: The outer mold mechanism (2) includes an outer lower mold base (24) fixedly connected to the top surface of the workbench (1). An outer upper mold base (25) is provided on the top of the outer lower mold base (24). A lower mounting groove (26) is provided on the top of the outer lower mold base (24). A lower extrusion mold (28) is fitted inside the inner cavity of the lower mounting groove (26). An upper mounting groove (27) is provided at the bottom of the outer upper mold base (25). An upper extrusion mold (29) is fitted inside the inner cavity of the upper mounting groove (27). The upper mounting groove (27) and the lower mounting groove (26) The inner cavity of each die is provided with multiple screw holes (31). The lower extrusion die (28) and the upper extrusion die (29) are provided with multiple stepped holes (32). The inner cavity of each of the multiple stepped holes (32) is fitted with an internal hexagon screw (33). The ends of the internal hexagon screws (33) are threaded into the inner cavity of the screw holes (31). The upper extrusion die (29) and the lower extrusion die (28) are provided with external clamping grooves (30). The drill pipe (3) is fitted into the inner cavity of the two external clamping grooves (30).

4. The bidirectional clamping device for drill pipe upsetting according to claim 1, characterized in that: The outer side of the inner clamping plate (11) is in contact with the inner wall of the drill pipe (3).

5. The bidirectional clamping device for drill pipe upsetting according to claim 3, characterized in that: The outer side of the drill pipe (3) is equal to the inner wall of the outer clamping groove (30).

6. The bidirectional clamping device for drill pipe upsetting according to claim 3, characterized in that: The lower extrusion die (28), the upper extrusion die (29), and the inner clamping plate (11) are of equal length.

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