A clamping structure for friction welding of drill pipe

Abstract

This application discloses a clamping structure for friction welding of drill pipes, including a movable frame mounted on a friction welding machine. A support frame is mounted on the movable frame, and multiple mounting brackets are mounted on the support frame. A slider is slidably mounted on each mounting bracket via a slide rail. The slider is adjusted by a clamping cylinder mounted on one side of the mounting bracket. A clamping block is mounted on one end of the slider, and a flash cutting tool is mounted on the side of the clamping block near the welding point. A thrust cylinder for moving the support frame is also mounted at the tail of the friction welding machine. Guide rods are mounted on both sides of the friction welding machine, and the guide rods pass through the movable frame. This application, through the clamping and positioning of the drill pipe and the rapid turning settings, can improve the welding efficiency and quality of the drill pipe. Simultaneously, this application can optimize the welding process, improve production efficiency, thereby accelerating production progress and reducing production energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and in particular to a clamping structure for friction welding of drill rods. Background Technology

[0002] Drill pipe is a crucial piece of equipment in the oil extraction process. Its primary function is to connect the drill bit to the drill string or top drive, forming a complete drill string. It transmits torque and drilling pressure from the surface to the drill bit underground, while also providing a channel for drilling fluid circulation. Drill pipe is a steel pipe with a threaded tail, used to connect the drilling rig's surface equipment to the drilling equipment or bottom hole assembly located at the bottom of the well. The purpose of 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. Drill pipe must be able to withstand enormous internal and external pressures, torsion, bending, and vibration. Drill pipe can be reused multiple times during oil and gas extraction and refining processes.

[0003] In the drill pipe manufacturing process, friction welding is typically used to connect the drill bit and the pipe body. During this process, the pipe body needs to be clamped and positioned, and burrs need to be removed. In the original design, since the cutting tool is a fixed structure, the entire drill pipe is moved by an ejector mechanism to achieve the purpose of cutting burrs. The execution steps are: clamping - ejecting - releasing - retracting - clamping again - ejecting again, resulting in low execution efficiency. Furthermore, conventional clamping methods are relatively fixed, using a single clamp, usually with two halves, which cannot achieve universality for various specifications, and it is not easy to adjust for misalignment after clamping. Therefore, we have proposed a clamping structure for friction welding of drill pipes to solve the above problems. Utility Model Content

[0004] This application provides a clamping structure for friction welding of drill pipes, which solves the problems of difficulty in positioning the head of the drill pipe and low production efficiency during the drill pipe production process.

[0005] This application provides a clamping structure for friction welding of drill pipe, including a movable frame mounted on a friction welding machine, a support frame mounted on the movable frame, a plurality of mounting frames mounted on the support frame, a slider slidably mounted on the mounting frame via a slide rail, the slider being adjusted by a clamping cylinder mounted on one side of the mounting frame, a clamping block being mounted on one end of the slider, a flash cutting tool being mounted on the side of the clamping block near the welding point, and a thrust cylinder for moving the support frame being mounted at the tail of the friction welding machine.

[0006] Preferably, guide rods are also installed on both sides of the friction welding machine, and the guide rods pass through the movable frame.

[0007] Preferably, there are 3-8 mounting brackets.

[0008] Preferably, the mounting brackets are evenly distributed on the support frame.

[0009] Preferably, the support frame is formed by two semi-circular brackets.

[0010] Preferably, the clamping block has a G-shaped cross-section.

[0011] Preferably, the thrust cylinder has a thrust of 200 kg.

[0012] As can be seen from the above technical solution, this application provides a clamping structure for friction welding of drill rods. When in use, the drill rod head is located on the spindle chuck, and the rod body is located at the tail end, extending from the tail end into the clamping structure of this application. It should be understood that the clamping structure of this application is used for docking and positioning of the rod body and the drill rod head. Its clamping force is not large. The clamping of the rod body is mainly completed by the clamping in the friction welding machine. The drill rod extends into the clamping structure, and then, according to the size of the drill rod, the initial stroke of the clamping cylinder of that size is adjusted and set to place the drill rod head and the rod body on the same axis. Then, the friction welding machine is started. After welding is completed, the thrust cylinder pushes the support frame. The support frame moves on the track of the friction welding machine through the moving frame. The flash cutting tool on the clamping block moves to the flash position and removes the flash left by welding. Then, the clamping block opens, the friction welding machine resets, and the welding and flash removal work is completed quickly for continuous production.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This application uses multiple clamping structures to clamp the drill rod around its circumference in multiple modules, which facilitates the adjustment of the drill rod's axial position. Furthermore, the multiple-module clamping reduces the risk of damage to the drill rod's surface, thus maintaining the drill rod's surface quality. 2. The flash cutting tool of this application is used in conjunction with the clamping block. After welding, it can be repaired along the surface of the drill rod. After welding, the flash can be removed without positioning, which improves the turning accuracy. 3. By setting up the thrust cylinder, the support frame can be pushed to complete the turning after welding, which effectively reduces the reciprocating path of the friction welding machine and improves production efficiency.

[0014] In summary, this application improves the welding efficiency and quality of drill pipes by optimizing the clamping and positioning and rapid turning settings. Furthermore, it optimizes the welding process, increases production efficiency, accelerates production progress, and reduces energy consumption. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0016] Figure 1This is a schematic diagram of the installation structure of a clamping structure for friction welding of drill rods proposed in this utility model; Figure 2 This is a schematic diagram of a clamping structure for friction welding of drill rods proposed in this utility model; Figure 3 This is an enlarged view of section A of the friction welding clamping structure for drill rods proposed in this utility model; Figure 4 This is a schematic diagram of the clamping block structure of a friction welding clamping structure for drill rods proposed in this utility model.

[0017] In the diagram: 1 Friction welding machine, 2 Guide rod, 3 Moving frame, 4 Thrust cylinder, 5 Support frame, 6 Mounting frame, 7 Clamping cylinder, 8 Slider, 9 Slide rail, 10 Clamping block, 11 Flash cutting tool, 111 Cutting edge. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0019] See Figure 1-4This application discloses a clamping structure for friction welding of drill rods. Specifically, it is used for connecting the rod body and head of a drill rod, and is applied in a friction welding machine 1. The structure includes a movable frame 3 mounted on the friction welding machine 1, which slides on a slide rail. A support frame 5 is mounted on the movable frame 3. The support frame 5 is formed by two semi-circular brackets fixed in the middle by a fixing bolt for support. Its center is concentric with the main shaft of the friction welding machine 1, and under the limitation of the movable frame 3, its center always moves on the axis of the main shaft. Multiple mounting brackets 6 are mounted on the support frame 5, serving as mounting references and providing relatively precise linear movement. The mounting brackets 6 are 3... - Eight mounting brackets are arranged around the center of the support frame 5. The mounting brackets 6 are evenly distributed on the support frame 5. Slider 8s are slidably mounted on the mounting brackets 6 via slide rails 9. The sliders 8 slide linearly along the slide rails 9 on the mounting brackets 6, providing stable support. Multiple sliders 8 are arranged radially, sliding at positions close to or away from the center of the support frame 5. The sliders 8 are adjusted by clamping cylinders 7 mounted on one side of the mounting bracket 6. A clamping block 10 is mounted on one end of each slider 8. During clamping, multiple clamping blocks 10 move simultaneously towards the center. Before processing a new drill rod, the initial position of the clamping blocks 10 is set. When the drill rod body and head... When deviation occurs, it can be adjusted by multiple clamping blocks 10. A flash cutting tool 11 is installed on the side of the clamping block 10 near the welding point. In this application, the flash cutting tool 11 is directly installed on the clamping block 10. Since the clamping structure of this application is only used for positioning, its clamping force is not high. The entire structure can be moved in the friction welding machine 1 by external force. The cutting edge 111 of the flash cutting tool 11 is located on the surface of the rod. The tail of the friction welding machine 1 is also equipped with a thrust cylinder 4 for moving the support frame 5. The thrust cylinder 4 only needs to have a thrust of 200 kg. After welding is completed, the clamping mechanism in the friction welding machine 1 opens, the drill rod rotates, and then the thrust cylinder... Cylinder 4 pushes the support frame 5 to move, which in turn moves the flash cutting tool 11 to the flash position for cutting. When the thrust cylinder 4 moves to the designated position, there is no need to position the cutting tool during the flash removal process. The spindle of the friction welding machine 1 stops rotating, the spindle chuck and the clamping structure of this application open, and the feeding equipment or workers continue to move the batch production after completing the material handling. The entire production process can reduce the reciprocating movement of the spindle module of the friction welding machine 1 by one, thereby achieving the purpose of improving production efficiency. The operation of the large cylinder of the spindle module is changed to the operation of the small cylinder of the thrust cylinder 4, which also improves the flexibility of the entire system and further reduces the energy consumption of the friction welding machine 1.

[0020] In this utility model, in order to further improve the stability of the clamping structure, guide rods 2 are installed on both sides of the friction welding machine 1. The guide rods 2 pass through the moving frame 3. In addition to moving on the original slide rail of the friction welding machine 1, the guide rods 2 provide further support and positioning to ensure the stability of the support and movement of the present application.

[0021] In this invention, the clamping block 10 has a G-shaped cross-section, which provides a certain buffer and reduces the maximum peak load, thereby improving the service life of the flash cutting tool 11.

[0022] As can be seen from the above technical solution, when this application is in use, the drill rod head is located on the spindle chuck, and the rod body is located at the tail. It extends from the tail into the clamping structure of this application. It should be understood that the clamping structure of this application is used for docking and positioning of the rod body and the drill rod head. Its clamping force is not large. The clamping of the rod body is mainly completed by the clamping in the friction welding machine 1. The drill rod extends into the clamping structure. Then, according to the size of the drill rod, the initial stroke of the clamping cylinder 7 of that size is adjusted and set so that the drill rod head and the rod body are on the same axis. Then, the friction welding machine 1 is started. After the welding is completed, the thrust cylinder 4 pushes the support frame 5. The support frame 5 moves on the track of the friction welding machine 1 through the moving frame 3. The flash cutting tool 11 on the clamping block 10 moves to the flash position and removes the flash left by welding. Then the clamping block 10 is opened, the friction welding machine 1 is reset, and the welding and flash removal work is completed quickly for continuous production.

[0023] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the claims.

[0024] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this application described above do not constitute a limitation on the scope of protection of this application.

Claims

1. A clamping structure for friction welding of a drill pipe, comprising a moving frame (3) mounted on a friction welding machine (1), characterized in that: The movable frame (3) is equipped with a support frame (5), and the support frame (5) is equipped with multiple mounting frames (6). The mounting frame (6) is equipped with a slider (8) via a slide rail (9). The slider (8) is adjusted by a clamping cylinder (7) installed on one side of the mounting frame (6). A clamping block (10) is installed at one end of the slider (8). A flash cutting tool (11) is installed on the side of the clamping block (10) near the welding point. The tail of the friction welding machine (1) is also equipped with a thrust cylinder (4) for moving the support frame (5).

2. A clamping structure for friction welding of a drill pipe according to claim 1, wherein Guide rods (2) are also installed on both sides of the friction welding machine (1), and the guide rods (2) pass through the moving frame (3).

3. A clamping structure for friction welding of a drill pipe according to claim 1, wherein There are 3-8 mounting brackets (6).

4. A clamping structure for friction welding of a drill pipe according to claim 3, wherein The mounting brackets (6) are evenly distributed on the support frame (5).

5. The clamp structure for friction welding of a drill pipe according to claim 1, wherein The support frame (5) is formed by two semi-circular brackets.

6. A clamping structure for friction welding of a drill pipe according to claim 1, wherein The clamping block (10) has a G-shaped cross-section.

7. The clamp structure for friction welding of a drill pipe according to claim 1, wherein The thrust cylinder (4) has a thrust of 200 kg.

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