Back-up wrench special for well drilling bit
By designing a special back clamp for drilling drill bit, using sliding connection and linkage device, the uniform stress and upward stress buffering of the drill bit is achieved, which solves the problem of floating and insufficient relative movement of the back clamp suspension system in the prior art, and improves the upward lifting force and protection effect of the drill bit.
Patent Information
- Application Number
- CN202422148663.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-09-02
AI Technical Summary
During the shackle of the drill rod, the suspension system of the back clamp is difficult to float, and the clamp head cannot achieve relative movement when clamping and loosening, resulting in collision with the clamp head when the drill rod rotates, causing damage.
A special back clamp for drilling drill bit is designed, which adopts a sliding connection between the column and the clamping device. The clamping device includes a linkage device, an upper plate, a lower plate, a clamp and a guide ring. The drill bit is clamped through four sets of clamps, and the upper and lower stress buffering of the drill bit is achieved through the linkage device and the compression spring.
The drill bit is subjected to uniform force through four sets of clamps to avoid damage caused by the force in a single direction, and at the same time, the lifting force of the drill bit is increased to ensure the smooth pulling of the drill bit. The pressure spring on the linkage device buffers the upper and lower stresses, avoiding hard contact of the drill bit and protecting the drill bit.
Smart Images
Figure CN222909963U_ABST
Abstract
Description
Technical Field:
[0001] The utility model relates to oil extraction equipment and facilities, and particularly relates to a special back-up tong for a drilling bit. Background Art:
[0002] In recent years, with the continuous development of drilling equipment and in order to better meet the needs of drilling special process wells, a top drive drilling device has been developed. This device combines a swivel with a motor, drives the drill string and the drill bit to rotate at the upper part of the derrick space, and is equipped with a device for screwing on and unscrewing drill pipes, capable of completing various drilling operations. Since the top drive drilling device is a new type of oil drilling equipment with the function of screwing on and unscrewing drill pipes, it can perform screwing on and unscrewing operations at any height of the derrick. The function of screwing on and unscrewing is achieved by the back-up tong of the top drive drilling device clamping the drill pipe while the hydraulic power drives the main shaft to rotate.
[0003] When screwing on and unscrewing drill pipes, two conditions need to be met: First, the suspension system of the back-up tong should be able to float up and down along the axis of the drill pipe as the thread is screwed. Second, when the jaws of the back-up tong clamp or release the drill pipe, relative movement should occur between the left jaw and the right jaw of the back-up tong. That is, when clamping, the left jaw and the right jaw quickly contract and move towards the center of the drill pipe; when releasing, the left jaw and the right jaw move outwards along the center of the drill pipe and keep a certain distance from the drill pipe, and the drill pipe should not collide with the jaws during rotation and drilling. To solve the above technical problems, a new technical solution is specifically proposed. Summary of the Utility Model:
[0004] The purpose of the utility model is to overcome the deficiencies of the above-mentioned existing technologies and provide a special back-up tong for a drilling bit.
[0005] The technical solution adopted by the utility model is as follows: A special back-up tong for a drilling bit includes a column, the column is connected with a clamping device and is in a sliding connection therebetween. The clamping device is connected with one end of a telescopic rod, and the other end of the telescopic rod is connected with the top of the column. The clamping device includes a linkage device, a lower plate, an upper plate, a jaw and a guide ring. One end of the linkage device passes through the upper plate and the lower plate, four groups of jaws are arranged between the upper plate and the lower plate, and a guide ring is arranged at the bottom of the lower plate.
[0006] As a preferred technical solution, the number of the linkage devices is two. The linkage device includes an inner rod, a connecting rod, a movable rod, a link rod, a compression spring and a limit block. One end of the inner rod is connected with the column, the other end of the inner rod is connected with the connecting rod and is in a sliding connection therebetween. The connecting rod is connected with the movable rod and is in a rotational connection therebetween. One end of the movable rod is connected with the link rod, the other end of the link rod passes through a through hole on the upper plate, the compression spring and a through hole on the lower plate and is connected with the limit block, and the link rod is fixedly connected with the limit block.
[0007] As a preferred technical solution, the compression spring is located between the upper plate and the lower plate and the compression spring passes through the connecting rod.
[0008] As a preferred technical solution, the number of the clamps is four groups. The four groups of clamps are placed around the guide ring. The clamp includes a fixed frame, a clamping block, a locking clip and a hydraulic cylinder. The fixed frame is fixed between the upper plate and the lower plate. A hydraulic cylinder is arranged inside the fixed frame. The hydraulic cylinder is connected with the clamping block and the connection between them is a sliding connection. A locking clip is arranged at the front end of the clamping block.
[0009] The beneficial effects of the utility model are as follows: The drill bit is clamped by four groups of clamps, so that the drill bit can be stressed in four directions, and the stress on the drill bit can be more uniform. In this way, the damage of the drill bit caused by the stress in a single direction can be avoided. At the same time, the lifting force of the drill bit can be increased to ensure that the drill bit can be smoothly pulled out. Moreover, through the compression spring on the linkage device, the up-and-down stress on the drill bit can be buffered, the hard contact of the drill bit can be effectively avoided, the damage of the drill bit can be avoided, and the drill bit can be effectively protected. Description of the drawings:
[0010] Figure 1 is the front view of the utility model.
[0011] Figure 2 is the structural schematic diagram of the clamping device of the utility model.
[0012] Figure 3 is the top view of the clamping device of the utility model.
[0013] Figure 4 is the structural schematic diagram of the clamp of the utility model. Specific implementation manners:
[0014] The drawings are only for illustrative purposes and cannot be construed as a limitation of this patent; for better illustrating this embodiment, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.
[0015] Referring to the various figures, a special back clamp for a drilling bit includes a column 1. The column 1 is connected to a clamping device 3 and the connection between them is a sliding connection. One end of the clamping device 3 is connected to one end of a telescopic rod 2, and the other end of the telescopic rod 2 is connected to the top of the column 1. The clamping device 3 includes a linkage device, a lower plate 206, an upper plate 207, a clamp 205 and a guide ring 204. One end of the linkage device passes through the upper plate 207 and the lower plate 206. There are four groups of clamps 205 between the upper plate 207 and the lower plate 206, and a guide ring 204 is provided at the bottom of the lower plate 206. The working principle of this device is that the drill bit is locked by the four groups of clamps 205, and then the linkage device in the clamping device 3 is driven by the telescopic rod 2 to move the upper plate 207 and the lower plate 206 up and down, so that the drill bit moves up and down. This movement can be adjusted according to the requirements of the use scenario.
[0016] As a preferred technical solution, the number of the linkage devices is two. The linkage device includes an inner rod, a connecting rod 201, a movable rod 202, a connecting link, a compression spring 203 and a limit block. One end of the inner rod is connected to the column 1, and the other end of the inner rod is connected to the connecting rod 201 and the connection between them is a sliding connection. The connecting rod 201 is connected to the movable rod 202 and the connection between them is a rotational connection. One end of the movable rod 202 is connected to one end of the connecting link, and the other end of the connecting link passes through a through hole 208 on the upper plate 207, the compression spring 203 and a through hole 208 on the lower plate 206 and is connected to the limit block and the connecting link is fixedly connected to the limit block. The linkage device is the device for the up and down movement of the whole mechanism and is the device that can ensure the longitudinal movement of the clamping device 3. The compression spring 203 of the linkage device can be replaced according to the requirements, so as to adjust the buffer force received longitudinally. Through the compression spring 203, the up and down stress on the drill bit can be buffered, which can effectively avoid the hard contact of the drill bit, avoid the damage of the drill bit and effectively protect the drill bit.
[0017] As a preferred technical solution, the compression spring 203 is located between the upper plate 207 and the lower plate 206 and the connecting link passes through the compression spring 203. The connecting link passing through the compression spring 203 can realize the directional compression of the compression spring 203, which can ensure that the force receiving direction of the compression spring is longitudinal and ensure the buffering of the longitudinal force.
[0018] As a preferred technical solution, the number of the clamps 205 is four groups, and the four groups of clamps 205 are placed around the guide ring 204. The clamps 205 include a fixed frame 501, a clamping block 502, a locking clamp 503 and a hydraulic cylinder 504. The fixed frame 501 is fixed between the upper plate 207 and the lower plate 206. A hydraulic cylinder 504 is arranged inside the fixed frame 501. The hydraulic cylinder 504 is connected to the clamping block 502 and the two are slidably connected. A locking clamp 503 is arranged at the front end of the clamping block 502. The clamps 205 mainly play the role of locking the drill bit. By clamping the drill bit with four groups of clamps, the drill bit can be stressed in four directions, and the drill bit can be stressed more evenly, so that the drill bit can be prevented from being damaged by stress in a single direction, and the lifting force on the drill bit can also be increased to ensure that the drill bit can be pulled out smoothly. In addition, by increasing the friction between the lines on the locking clamp 503 and the drill bit, the drill bit clamping effect can be guaranteed to be better.
[0019] This device clamps the drill bit through four sets of clamps 205, so that the drill bit can be subjected to force in four directions, and the force on the drill bit can be made more uniform. This can avoid damage to the drill bit caused by force in a single direction of the drill bit, and can also increase the lifting force on the drill bit to ensure that the drill bit can be pulled out smoothly. Moreover, through the compression spring 203 on the linkage device, the upper and lower stresses of the drill bit can be buffered, which can effectively avoid hard contact of the drill bit, avoid damage to the drill bit, and effectively protect the drill bit.
[0020] In the figure, the description of the positional relationship is only for illustrative purposes and cannot be understood as a limitation of this patent; obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not limitations on the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the scope of protection of the claims of the utility model.
Claims
1. A back-up tong for a drilling bit, comprising a column, characterized in that: The column is connected to the clamping device and the two are slidably connected. The clamping device is connected to one end of the telescopic rod, and the other end of the telescopic rod is connected to the top of the column. The clamping device includes a linkage device, a lower plate, an upper plate, a clamp and a guide ring. One end of the linkage device passes through the upper plate and the lower plate, four sets of clamps are provided between the upper plate and the lower plate, and a guide ring is provided at the bottom of the lower plate.
2. The special back-up tong for drilling bit according to claim 1, characterized in that: There are two groups of linkage devices, which include an inner rod, a connecting rod, a movable rod, a connecting rod, a compression spring and a limit block. One end of the inner rod is connected to the column, and the other end of the inner rod is connected to the connecting rod and the two are slidably connected. The connecting rod is connected to the movable rod and the two are rotatably connected. The movable rod is connected to one end of the connecting rod, and the other end of the connecting rod passes through a through hole on the upper plate, a compression spring and a through hole on the lower plate to be connected to the limit block, and the connecting rod and the limit block are fixedly connected.
3. A special back-up tong for drilling bit according to claim 2, characterized in that: The compression spring is located between the upper plate and the lower plate and passes through the connecting rod.
4. The special backup tong for drilling bit according to claim 1, characterized in that: There are four groups of clamps, which are placed around the guide ring. The clamps include a fixed frame, a clamping block, a locking clamp and a hydraulic cylinder. The fixed frame is fixed between the upper plate and the lower plate. A hydraulic cylinder is provided inside the fixed frame. The hydraulic cylinder is connected to the clamping block and the two are slidably connected. A locking clamp is provided at the front end of the clamping block.