Casing wrench with adjustable back-up wrench height
By introducing a suspension spring adjustment device and a sensing distance device into the casing wrench, the problem of the non-adjustable height of the main wrench and the back wrench was solved, and the floating of the back wrench and the real-time measurement of torque were realized, thus improving the stability and quality of casing operations.
Patent Information
- Application Number
- CN202422714752.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-11-07
AI Technical Summary
The existing casing wrench has a non-adjustable height between the main wrench and the back wrench, resulting in low structural strength, poor stability, and the inability to measure and transmit torque data in real time, which affects the quality of casing operations.
A suspension spring adjustment device is used to connect the back clamp and the main clamp, enabling the back clamp to float and adjust its height relative to the main clamp. The torque is measured in real time by a sensing distance device, and the real-time torque during operation is calculated by multiplying the tension value by the torque arm length.
The adjustable height of the back clamp was achieved, which improved the structural stability of the casing clamp and the accuracy of torque measurement, thereby enhancing the quality of casing operations.
Smart Images
Figure CN223647756U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to oilfield drilling equipment technical field, especially in a back wrench height adjustable type casing tongs. BACKGROUND
[0002] In oil and gas well repair operation, generally adopt the power tongs with back wrench casing. But the main tongs and back wrench of the power tongs used in casing operation in domestic oilfield generally adopt slide bar connection mode, and its shortcoming is low structural strength and poor stability. The casing tongs generally adopt spring to adjust the make-up (or breakout), and because of the distance between the main tongs and back wrench when operating, the back wrench can only clamp the casing coupling but not the casing body. Therefore, the structure has the shortcomings of short adjustment distance and poor reliability.
[0003] At the same time, the current back wrench casing tongs generally adopt hydraulic cylinder to measure torque, so that the torque data cannot be measured and transmitted in real time, the measurement precision is low, and the quality of casing operation cannot be improved. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a back wrench height adjustable type casing tongs to solve one or more of the above problems.
[0005] The utility model provides a back wrench height adjustable type casing tongs, which comprises a main tongs, a back wrench and a hanging spring adjusting device, the lower part of the main tongs is fixedly connected with the back wrench through a plurality of hanging spring adjusting devices, and the hanging spring adjusting device is used to make the back wrench go up and down to adjust the distance between the main tongs and the back wrench. Therefore, the back wrench can float left and right relative to the main tongs, and can also go up and down through the hanging spring adjusting device.
[0006] As a preferred mode, the number of spring adjusting devices is four, the hanging spring adjusting device comprises an adjusting screw rod, an adjusting cylinder and an outer cylinder body, a spring is sleeved between the adjusting cylinder and the outer cylinder body, one end of the spring is connected to the outer cylinder body, the other end is connected to a spring seat, the spring seat is sleeved on the lower end of the adjusting screw rod, the adjusting screw rod is arranged in the interior of the adjusting cylinder and is fixedly connected with the adjusting cylinder in a threaded mode.
[0007] As a preferred mode, the upper end of the adjusting cylinder is connected with the main tongs, and the lower end of the outer cylinder body is fixedly connected with the back wrench.
[0008] As a preferred mode, a flange is arranged on the outer circle of the outer cylinder body, the outer cylinder body is fixedly connected with the back wrench through the flange, the upper end of the adjusting cylinder is connected with a connecting chain, and the connecting chain is connected with the main tongs in a threaded mode through an adjusting bolt and a nut. Therefore, the adjusting cylinder and the main tongs are stably connected, and the back wrench can float left and right relative to the main tongs.
[0009] As a preferred mode of implementation, the tail of the main tong is provided with a bracket, a sensing distance measuring device is arranged between the tail of the back tong and the bracket, the bracket is provided with a guide groove in the vertical direction, and the sensing distance measuring device slides up and down along the guide groove.
[0010] As a preferred mode of implementation, the sensing distance measuring device comprises a tension sensor, one end of the tension sensor is fixedly connected with the tail of the back tong through a first pull rod, the other end is hingedly connected with a sliding device through a pull head, the sliding device slides up and down in the guide groove of the bracket, and the sliding device is connected with the tail of the back tong. Thus, by utilizing the flexibility of the connecting chain and the elasticity of the spring, the structure can realize the floating function of the back tong relative to the main tong.
[0011] As a preferred mode of implementation, the sliding device comprises a sliding shaft and a sliding sleeve, the other end of the tension sensor is hingedly connected with the sliding shaft through a pull head, the sliding sleeve is sleeved on both sides of the sliding shaft, and the other end of the sliding shaft is hingedly connected with a chain ring, and the chain ring is fixedly connected with the tail of the back tong through a second pull rod. Thus, the tension sensor is hingedly connected with the back tong and the bracket respectively, so that the torque measurement is accurate and transmission is ensured.
[0012] Compared with the prior art, the application has the following beneficial effects:
[0013] The back tong height adjustable type casing tong has the characteristics of unique structure, reliable performance and convenient adjustment control, solves the problem that the height between the main tong and the back tong of the casing tong used in the casing operation of the domestic oil field cannot be adjusted, adopts the hanging spring adjusting device to connect the back tong and the main tong, realizes the floating of the back tong relative to the main tong, and enables the back tong to ascend and descend to adjust the distance between the back tong and the main tong, and the sensing distance measuring device is arranged, the real-time torque during work is accurately calculated by multiplying the measured tension value and the torque arm length. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 FIG. 1 is a structural schematic view of the back tong height adjustable type casing tong of the utility model;
[0015] Figure 2 FIG. 2 is a structural schematic view of the back tong height adjustable type casing tong in the A perspective view; Figure 1
[0016] Figure 3 FIG. 4 is a structural schematic view of the adjusting hanging spring device in the back tong height adjustable type casing tong of the utility model;
[0017] Figure 4 FIG. 5 is a structural schematic view of the sensing distance measuring device in the back tong height adjustable type casing tong of the utility model. DETAILED DESCRIPTION
[0018] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0019] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0020] like Figures 1-4 As shown, this utility model provides a pipe wrench with adjustable back clamp height, including a main clamp 1, a back clamp 2, a lifting spring adjustment device 3, a bracket 4, and a sensing distance device 5. The main clamp 1 is fixedly connected to the back clamp 2 at the bottom via four lifting spring adjustment devices 3. The lifting spring adjustment devices are used to raise and lower the back clamp to adjust the distance between the main clamp 1 and the back clamp 2. Thus, the back clamp can float back and forth and left and right relative to the main clamp, and can also be raised and lowered via the lifting spring adjustment devices. It should be noted that the main clamp of this application is driven by a motor, which drives the clamp head to rotate through a speed change and reduction mechanism to clamp and rotate the oil pipe; the back clamp is driven by a hydraulic cylinder to clamp the pipe and works with the main clamp to perform threading or unthreading operations on the pipe.
[0021] The suspension spring adjustment device includes an adjusting screw 3.1, an adjusting cylinder 3.3, and an outer cylinder 3.4. A spring 3.5 is sleeved between the adjusting cylinder 3.3 and the outer cylinder 3.4. One end of the spring 3.5 is connected to the outer cylinder, and the other end is connected to the spring seat 3.2. The spring seat 3.2 is sleeved on the lower end of the adjusting screw 3.1. The adjusting screw 3.1 is located inside the adjusting cylinder 3.3 and is threadedly fixed to the adjusting cylinder 3.3. The adjusting screw 3.1 and the adjusting cylinder 3.3 are connected as a whole after the threaded connection. This whole is connected to the spring seat 3.2, so that the back clamp can move up and down relative to the main clamp by adjusting the adjusting screw. Specifically, the upper end of the adjusting cylinder 3.3 is connected to a connecting chain. The connecting chain is threaded to the main clamp 1 through adjusting bolts 3.7 and nuts 3.8. A flange is provided on the outer circle of the lower end of the outer cylinder 3.4 and is fixedly connected to the back clamp 2 through the flange. Therefore, by utilizing the flexibility of the connecting chain and the elasticity of the spring, this structure enables the back clamp to have a floating function relative to the main clamp.
[0022] The tail of the main tong 1 is provided with a bracket 4, the bracket 4 is fixedly connected with the main tong 1 through a threaded pin 1.1, the tail of the back tong 2 is provided with a sensing distance measuring device 5 between the bracket 4, the bracket 4 is provided with a guide groove 4.1 in the vertical direction, and the sensing distance measuring device 5 can slide up and down in the guide groove 4.1 of the bracket 4.
[0023] The sensing distance measuring device 5 comprises an adjusting nut 5.1, a first pull rod 5.2, a tension sensor 5.3, a pull head 5.4, a sliding device, a chain ring 5.7, a pin shaft 5.8 and a second pull rod 5.9. One end of the tension sensor 5.3 is fixedly connected with the tail of the back tong 2 through the first pull rod 5.2 and the adjusting nut 5.1, the other end is hingedly connected with the sliding device through the pull head 5.4, the sliding device slides up and down in the guide groove 4.1 of the bracket 4, and the sliding device is connected with the tail of the back tong 2.
[0024] As shown in Figure 4 The sliding device comprises a sliding shaft 5.5 and a sliding sleeve 5.6, the other end of the tension sensor 5.3 is hingedly connected with the sliding shaft 5.5 through the pull head 5.4, the sliding sleeve 5.6 is sleeved on both sides of the sliding shaft 5.5, the sliding device is arranged in the guide groove 4.1 on both sides of the bracket 4 as a whole, and the other end of the sliding shaft 5.5 is hingedly connected with the chain ring 5.7, and the chain ring 5.7 is fixedly connected with the tail of the back tong 2 through the second pull rod 5.9 and the adjusting nut 5.1. Therefore, the tension sensor in the application is hingedly connected with the back tong and the bracket respectively, so that the measured tension value is more accurate, and the real-time torque of the casing tong during work can be accurately measured by multiplying the tension value and the torque arm length.
[0025] The above description is only a preferred mode of the utility model, and it should be pointed out that, for ordinary skilled persons in the art, without departing from the creative concept of the utility model, a plurality of deformations and improvements can be made, which should also be regarded as the protection range of the utility model.
Claims
1. A back pincer height adjustable pipe wrench characterized by, The device comprises a main clamp (1), a back clamp (2) and a spring adjusting device (3), the lower part of the main clamp (1) is fixedly connected with the back clamp (2) through a plurality of spring adjusting devices (3), the spring adjusting device is used for lifting the back clamp up and down to adjust the distance between the main clamp (1) and the back clamp (2); The number of the spring adjusting device is four, the spring adjusting device comprises an adjusting screw rod (3.1), an adjusting cylinder (3.3) and an outer cylinder body (3.4), a spring (3.5) is sleeved between the adjusting cylinder (3.3) and the outer cylinder body (3.4), one end of the spring (3.5) is connected to the outer cylinder body, the other end is connected to a spring seat (3.2), the spring seat (3.2) is sleeved on the lower end of the adjusting screw rod (3.1), the adjusting screw rod (3.1) is arranged in the inside of the adjusting cylinder (3.3) and is fixedly connected with the adjusting cylinder (3.3) in a threaded mode.
2. The back pincer height adjustable type pipe wrench according to claim 1, wherein The upper end of the adjusting cylinder (3.3) is connected with the main clamp, the lower end of the outer cylinder body (3.4) is fixedly connected with the back clamp (2).
3. The back pincer height adjustable type pipe wrench according to claim 2, wherein A flange is arranged on the outer circle of the outer cylinder body, the outer cylinder body is fixedly connected with the back clamp through the flange, the upper end of the adjusting cylinder (3.3) is connected with a connecting chain, the connecting chain is threadedly connected with the main clamp (1) through an adjusting bolt (3.7) and a nut (3.8).
4. The back pincer height adjustable type pipe wrench according to claim 3, wherein A bracket (4) is arranged at the tail of the main clamp (1), a sensing distance measuring device (5) is arranged between the tail of the back clamp (2) and the bracket (4), a guide groove (4.1) is formed in the bracket (4) in the vertical direction, the sensing distance measuring device (5) slides up and down along the guide groove (4.1).
5. The back pincer height adjustable cannula forceps according to claim 4, wherein, The sensing distance measuring device (5) comprises a tension sensor (5.3), one end of the tension sensor (5.3) is fixedly connected with the tail of the back clamp (2) through a first pull rod (5.2), the other end is hingedly connected with a sliding device through a pull head (5.4), the sliding device slides up and down in the guide groove (4.1) of the bracket (4), and the sliding device is connected with the tail of the back clamp (2).
6. The back pincer height adjustable type pipe wrench according to claim 5, wherein The sliding device comprises a sliding shaft (5.5) and a sliding sleeve (5.6), the other end of the tension sensor (5.3) is hingedly connected with the sliding shaft (5.5) through the pull head (5.4), the sliding sleeve (5.6) is sleeved on both sides of the sliding shaft (5.5), and the other end of the sliding shaft (5.5) is hingedly connected with a chain ring (5.7), the chain ring (5.7) is fixedly connected with the tail of the back clamp (2) through a second pull rod (5.9).