A casing power tong with automatic righting mechanism

Abstract

This utility model provides a power pliers for casing with an automatic straightening mechanism, including a power pliers base, a positioning block fixedly installed inside the power pliers base, a connecting seat fixedly installed at the bottom of the power pliers base, a sliding groove formed on the outer side of the connecting seat, a pliers disc fixedly installed on the outer side of the power pliers base, a threaded hole formed at the bottom of the pliers disc, and a straightening mechanism provided on the outer side of the power pliers base. This power pliers for casing with an automatic straightening mechanism ensures precise alignment between the casing and the pliers disc, reducing the probability of slippage due to misalignment. The threaded hole can be fixed at different positions to adjust the clamping distance between the moving seat and the straightening pliers, enhancing the adaptability of the equipment to casing operations of different specifications. It ensures even distribution of force on the casing during straightening, avoiding casing deformation or tilting of the power pliers base due to excessive force on one side, and reducing the safety risks of component loosening or casing detachment.

Description

Technical Field

[0001] This utility model relates to the technical field of power sleeve clamps, and in particular to a power sleeve clamp with an automatic straightening mechanism. Background Technology

[0002] In oil drilling operations, casing power tongs are key equipment used for connecting and disconnecting casing. They clamp the casing and rotate it to connect or disconnect it. However, existing casing power tongs have significant shortcomings in use. During lifting and lowering, the casing is prone to tilting due to uneven gravity, swaying of the lifting device, and other factors. When the tilted casing enters the power tong, the clamping mechanism of the power tong will not be properly aligned with the casing, which not only affects the stability of the clamping but may also cause the casing to slip during operation, reducing work efficiency. The tilted casing may also collide with the inlet end of the power tong, causing scratches on the casing surface or damage to the power tong components, increasing equipment maintenance costs and casing wear rate. Therefore, there is a particular need for a casing power tong with an automatic straightening mechanism.

[0003] Existing casing power wrenches rely heavily on manual operation, requiring rudimentary tools such as crowbars and ropes. Through repeated prying and pulling, the casing is gradually aligned with the wellhead center. This requires multiple workers to coordinate, expending significant physical strength, and maintaining high concentration for extended periods to handle various unforeseen situations. The alignment accuracy is heavily influenced by the operator's experience, making it difficult to accurately judge the casing's deviation angle, often resulting in poor alignment. This fails to meet the high-precision requirements of modern engineering operations. Furthermore, the rapid lowering of the casing poses a high safety risk. When the casing loses control due to its own weight and inertia, it is prone to swinging, potentially pulling nearby personnel into the equipment or causing a violent collision between the casing and the wellhead, leading to equipment damage, wellhead collapse, and other serious accidents, severely threatening the lives of workers and the safety of the engineering construction. Utility Model Content

[0004] The purpose of this invention is to provide a casing power pliers with an automatic straightening mechanism to solve the problems mentioned in the background art. Existing casing power pliers rely heavily on manual operation, requiring simple tools such as crowbars and ropes to repeatedly pry and pull the casing to align it with the wellhead center. This requires multiple workers to cooperate, expending significant physical strength and maintaining high concentration for extended periods to handle various emergencies during the straightening process. The straightening accuracy is highly dependent on the operator's experience, making it difficult to accurately judge the casing deviation angle, often resulting in poor straightening effects. This fails to meet the high-precision operation requirements of modern engineering. Furthermore, there are extremely high safety risks during rapid casing descent. When the casing loses control due to its own weight and inertia, it is prone to swinging, potentially pulling nearby operators into the equipment or causing a violent collision between the casing and the wellhead, leading to equipment damage, wellhead collapse, and other serious accidents, severely threatening the lives of workers and the safety of engineering construction.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a power clamp with an automatic straightening mechanism, comprising a power clamp base, a positioning block fixedly installed inside the power clamp base, a connecting seat fixedly installed at the bottom of the power clamp base, a sliding groove formed on the outer side of the connecting seat, a clamp disc fixedly installed on the outer side of the power clamp base, a threaded hole formed at the bottom of the clamp disc, a straightening mechanism provided on the outer side of the power clamp base, the straightening mechanism including a movable seat, a threaded hole formed at the top of the movable seat, a threaded post formed on the outer side of the movable seat, anti-slip texture formed on the inner side of the movable seat, a connecting block fixedly installed on the inner side of the power clamp base, a rotating column rotatably installed at the bottom of the connecting block, a straightening clamp fixedly installed on the outer side of the rotating column, a straightening frame provided on the outer side of the connecting seat, a slide rail fixedly installed on the outer side of the straightening frame, a limit block fixedly installed on the outer side of the straightening frame, a limit post fixedly installed on the outer side of the limit block, and a tension spring fixedly installed on the outer side of the limit block.

[0006] Preferably, the movable seat, threaded hole two, threaded column, anti-slip texture, connecting block, rotating column and straightening clamp are provided in two identical sets, and the two sets of movable seat, threaded hole two, threaded column, anti-slip texture, connecting block, rotating column and straightening clamp are symmetrically distributed about the vertical center line of the power clamp seat.

[0007] Preferably, the diameter of the second threaded hole is the same as that of the first threaded hole, and both the second threaded hole and the first threaded hole are adapted to the threaded post.

[0008] Preferably, the movable seat has a “]” shaped structure and is adapted to the straightening clamp.

[0009] Preferably, the threaded holes are provided in multiple identical sets, and the multiple sets of threaded holes are equidistantly distributed on the movable seat.

[0010] Preferably, the slide rail and the limiting block are fixedly connected, and the slide rail is adapted to the slide groove.

[0011] Preferably, the straightening frame, slide rail, limiting block and limiting post are provided in two identical sets, and the two sets of the straightening frame, slide rail, limiting block and limiting post are symmetrically distributed about the vertical center line of the connecting seat, and the tension spring is located between the two sets of limiting blocks.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This power clamp with an automatic straightening mechanism, by setting a straightening mechanism, drives the straightening clamp to rotate through the rotating column, and can apply clamping and straightening force from both sides of the casing. In conjunction with the anti-slip texture on the inner side of the moving seat, it can increase the friction with the casing and prevent the casing from slipping during the straightening process. The two sets of straightening frames on the outer side of the connecting seat can be adjusted in position through the cooperation of the slide rail and the slide groove. The tension spring between the limit blocks can provide continuous opposing tension, so that the limit column can assist in limiting the casing from the circumference, ensuring that the casing and the clamp disc are accurately aligned, which greatly reduces the probability of clamping slippage caused by misalignment. By selecting the threaded hole two at different positions and fixing it through the threaded column, the clamping distance of the moving seat and the straightening clamp can be adjusted, which greatly enhances the adaptability of the equipment to the operation of casings of different specifications, so that the force on the casing during the straightening process is evenly distributed, avoiding casing deformation or tilting of the power clamp seat due to excessive force on one side, and reducing the safety risks of component loosening or casing falling off. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the mating structure between the clamp disc and the threaded hole of this utility model;

[0015] Figure 3 This is a schematic diagram of the interlocking structure of the connecting seat and the sliding groove of this utility model;

[0016] Figure 4 This is a schematic diagram of the uprighting mechanism of this utility model.

[0017] In the diagram: 1. Power clamp seat; 2. Positioning block; 3. Connecting seat; 4. Slide groove; 5. Clamp disc; 6. Threaded hole one; 7. Straightening mechanism; 701. Moving seat; 702. Threaded hole two; 703. Threaded post; 704. Anti-slip texture; 705. Connecting block; 706. Rotating post; 707. Straightening clamp; 708. Straightening frame; 709. Slide rail; 710. Limiting block; 711. Limiting post; 712. Tension spring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 This utility model provides a technical solution: a sleeve power pliers with an automatic straightening mechanism, including a power pliers base 1, a positioning block 2 fixedly installed inside the power pliers base 1, a connecting seat 3 fixedly installed at the bottom of the power pliers base 1, a sliding groove 4 opened on the outer side of the connecting seat 3, a pliers disc 5 fixedly installed on the outer side of the power pliers base 1, a threaded hole 6 opened at the bottom of the pliers disc 5, and a straightening mechanism 7 provided on the outer side of the power pliers base 1; the straightening mechanism 7 includes a movable seat 701, a threaded hole 702 opened at the top of the movable seat 701, and the movable seat 701... A threaded post 703 is provided on the outer side of the seat 701, and an anti-slip texture 704 is provided on the inner side of the movable seat 701. A connecting block 705 is fixedly installed on the inner side of the power clamp seat 1. A rotating post 706 is rotatably installed on the bottom of the connecting block 705. A straightening clamp 707 is fixedly installed on the outer side of the rotating post 706. A straightening frame 708 is provided on the outer side of the connecting seat 3. A slide rail 709 is fixedly installed on the outer side of the straightening frame 708. A limit block 710 is fixedly installed on the outer side of the straightening frame 708. A limit post 71 is fixedly installed on the outer side of the limit block 710. 1. A tension spring 712 is fixedly installed on the outer side of the limiting block 710. A straightening mechanism 7 is provided, which rotates the straightening clamp 707 via the rotating column 706, applying clamping and straightening force from both sides of the sleeve. Combined with the anti-slip texture 704 on the inner side of the moving seat 701, this increases friction with the sleeve, preventing slippage during straightening. The two sets of straightening frames 708 on the outer side of the connecting seat 3 are position-adjustable via the cooperation of the slide rail 709 and the slide groove 4. The tension spring 712 between the limiting blocks 710 provides continuous opposing tension, causing the limiting column... 711 provides circumferential auxiliary limiting to ensure precise alignment between the casing and the clamping disc 5, significantly reducing the probability of slippage due to misalignment. Different threaded holes 702 are selected and fixed via threaded posts 703, thereby adjusting the clamping distance between the moving seat 701 and the straightening clamp 707. This greatly enhances the equipment's adaptability to casing operations of different specifications, ensuring even distribution of force on the casing during straightening, preventing casing deformation or tilting of the power clamp seat 1 due to excessive force on one side, and reducing the safety risks of component loosening or casing detachment.

[0020] Furthermore, the movable seat 701, threaded hole 702, threaded post 703, anti-slip texture 704, connecting block 705, rotating post 706, and straightening clamp 707 are provided in two identical sets, and the two sets of movable seats 701, threaded hole 702, threaded post 703, anti-slip texture 704, connecting block 705, rotating post 706, and straightening clamp 707 are symmetrically distributed about the vertical center line of the power clamp seat 1. This is achieved by providing two sets of movable seats 701, threaded hole 702, threaded post 703, and anti-slip texture 704. 4. The connecting block 705, rotating column 706, and straightening clamp 707 can form symmetrical clamping and straightening forces from both sides of the sleeve, avoiding the sleeve from shifting to the other side due to uneven force during unilateral straightening. The straightening clamps 707 on both sides can move synchronously under the drive of the rotating column 706 to ensure consistent clamping force on the sleeve. In conjunction with the anti-slip texture 704 on the inner side of the moving seat 701, the friction with the sleeve can be enhanced in both directions, further preventing the sleeve from sliding or rotating during the straightening process, making the straightening operation more stable and reliable.

[0021] Furthermore, the diameter of threaded hole 702 is consistent with that of threaded hole 6. Both threaded hole 702 and threaded hole 6 are compatible with threaded post 703. By setting threaded hole 702 and threaded hole 6 to threaded post 703, the force on threaded post 703 is more even, avoiding loosening or stripping of the connection due to mismatched hole diameters. It also facilitates the standardized production and replacement of threaded post 703. When threaded post 703 is worn, it can be directly replaced with a part of the same specification, reducing the difficulty and cost of maintenance.

[0022] Furthermore, the movable seat 701 has a “]” shaped structure and is adapted to the straightening clamp 707. By setting the movable seat 701 and the straightening clamp 707, the straightening clamp 707 is kept within the preset working range during rotation, avoiding deviation or misalignment. This ensures that when the straightening clamp 707 is clamping the sleeve, the movable seat 701 can provide auxiliary support from the outside, enhancing the structural strength of the straightening clamp 707, preventing the straightening clamp 707 from deforming due to excessive clamping force, and extending the service life of the straightening clamp 707.

[0023] Furthermore, multiple sets of threaded holes 702 are provided, and these multiple sets of threaded holes 702 are equidistantly distributed on the movable seat 701. By providing multiple sets of threaded holes 702, the installation position of the threaded post 703 can be flexibly selected according to the sleeves of different diameters, thereby adjusting the position of the movable seat 701 and the straightening clamp 707, achieving precise straightening of sleeves of different specifications. The equidistant distribution design makes the adjustment process more regular, and operators can quickly find the appropriate installation hole position without repeated measurements, shortening the adjustment time, improving the operating efficiency of the equipment, and also expanding the applicability of the equipment.

[0024] Furthermore, the slide rail 709 and the limiting block 710 are fixedly connected. The slide rail 709 is adapted to the slide groove 4. By setting the slide rail 709 and the limiting block 710, relative displacement during adjustment is avoided, which would affect the limiting effect. The compatibility between the slide rail 709 and the slide groove 4 allows the straightening frame 708 to slide smoothly along the slide groove 4, reducing resistance during adjustment and making the position adjustment of the straightening frame 708 more convenient and effortless. At the same time, the cooperation between the slide rail 709 and the slide groove 4 also guides the movement direction of the straightening frame 708, ensuring that the straightening frame 708 always moves in a straight line.

[0025] Furthermore, two identical sets of the straightening frame 708, slide rail 709, limiting block 710, and limiting post 711 are provided, and the two sets of straightening frame 708, slide rail 709, limiting block 710, and limiting post 711 are symmetrically distributed about the vertical center line of the connecting seat 3. The tension spring 712 is located between the two sets of limiting blocks 710. By providing two sets of straightening frame 708, slide rail 709, limiting block 710, and limiting post 711, the tension spring 712 can be positioned between the two sets of limiting blocks 710. The two sides form a symmetrical limiting effect on the sleeve. With the tension of the tension spring 712, the two sets of limiting posts 711 can fit tightly against the outer side of the sleeve, and assist in straightening the sleeve from the circumference. The symmetrical distribution structure makes the limiting force on the sleeve more uniform, avoiding the sleeve from shifting due to excessive limiting force on one side. The elastic effect of the tension spring 712 can also make the spacing of the limiting posts 711 automatically adjust according to the diameter of the sleeve, enhancing the adaptability to sleeves of different specifications.

[0026] Working principle: First, the operator fixes the positioning block 2 in the preset position inside the power clamp seat 1, ensuring a firm connection between the positioning block 2 and the power clamp seat 1, providing a reference for subsequent component installation. Two sets of connecting blocks 705 are then symmetrically fixed and installed on the inner side of the power clamp seat 1. The two sets of connecting blocks 705 must be symmetrically distributed about the vertical center line of the power clamp seat 1. A rotating column 706 is rotatably installed at the bottom of each connecting block 705, ensuring that the rotating column 706 can rotate flexibly without jamming. Then, a straightening clamp 707 is fixedly installed on the outer side of the rotating column 706, ensuring that the straightening clamp 707 is properly positioned during installation. The clamping surfaces of the straightening clamps 707 face inwards, and the initial positions of the two sets of straightening clamps 707 are symmetrical. Multiple sets of equally spaced threaded holes 702 are opened on the top of the movable seat 701, and anti-slip textures 704 are provided on the inner side of the movable seat 701. The movable seat 701 is fitted onto the outer side of the straightening clamps 707, ensuring a proper fit. Based on the expected specifications of the sleeve, a suitable threaded hole 702 on the movable seat 701 is selected, aligning it with the threaded hole 6 at the bottom of the clamp disc 5. Then, the threaded post 703 is screwed into the aligned threaded hole 6. In threaded hole 702, tighten threaded post 703 to fix movable seat 701. The two sets of movable seats 701 need to be installed symmetrically. Slide rails 709 are fixedly installed on the outer sides of the two sets of straightening frames 708, and limiting blocks 710 are fixedly installed on the outer sides of the straightening frames 708, ensuring that slide rails 709 and limiting blocks 710 are firmly connected to the straightening frames 708. The two sets of straightening frames 708 are then installed in the sliding grooves 4 on the outer side of the connecting seat 3 via slide rails 709. Slide rails 709 must be compatible with sliding grooves 4. Push the straightening frame 708 to check if it can slide smoothly along the sliding grooves 4; then... The limiting post 711 is fixedly installed on the outside of the positioning block 710. The two sets of straightening frames 708 need to be symmetrically distributed about the vertical center line of the connecting seat 3. The tension spring 712 is installed between the two sets of limiting blocks 710. The two ends of the tension spring 712 are fixedly connected to the limiting blocks 710 on both sides respectively. During installation, ensure that the tension spring 712 is in a naturally stretched state, neither too tight nor too loose, so as to ensure that it can provide a stable opposing tension. After all the components are installed, push the straightening frame 708 and observe the sliding of the slide rail 709 in the slide groove 4 to ensure that there is no jamming and the movement is smooth.Rotate the rotating column 706 to check the rotational flexibility of the straightening clamp 707. Simultaneously observe the limiting effect of the moving seat 701 on the straightening clamp 707, ensuring that the straightening clamp 707 rotates within the preset range. Place the test sleeve in the straightening mechanism 7 and observe whether the limiting column 711 can tightly fit against the outside of the sleeve under the action of the tension spring 712, and whether the straightening clamp 707 can stably clamp the sleeve from both sides. If there is a deviation, the distance between the moving seat 701 and the straightening clamp 707 can be finely adjusted by adjusting the position of the threaded column 703 in the threaded hole 702 until the sleeve can be accurately straightened and aligned with the clamp disc 5. Check all threaded connections to ensure that the threaded column 703 and other components are tightened correctly. Check the firmness of each fixed connection to avoid any loosening. Finally, conduct a trial operation to simulate the sleeve uncoupling process, observe the working state of the straightening mechanism 7, and confirm that it can stably achieve the automatic straightening function without sleeve slippage, offset, or abnormal wear of components. Complete the overall installation.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A power clamp with an automatic straightening mechanism for casing, comprising a power clamp base (1), characterized in that: A positioning block (2) is fixedly installed inside the power clamp seat (1). A connecting seat (3) is fixedly installed at the bottom of the power clamp seat (1). A sliding groove (4) is opened on the outside of the connecting seat (3). A clamp plate (5) is fixedly installed on the outside of the power clamp seat (1). A threaded hole (6) is opened at the bottom of the clamp plate (5). A straightening mechanism (7) is provided on the outside of the power clamp seat (1). The straightening mechanism (7) includes a movable seat (701), the top of the movable seat (701) is provided with a threaded hole (702), the outer side of the movable seat (701) is provided with a threaded post (703), the inner side of the movable seat (701) is provided with anti-slip texture (704), the inner side of the power clamp seat (1) is fixedly installed with a connecting block (705), the bottom of the connecting block (705) is rotatably installed with a rotating column (706), the outer side of the rotating column (706) is fixedly installed with a straightening clamp (707), the outer side of the connecting seat (3) is provided with a straightening frame (708), the outer side of the straightening frame (708) is fixedly installed with a slide rail (709), the outer side of the straightening frame (708) is fixedly installed with a limiting block (710), the outer side of the limiting block (710) is fixedly installed with a limiting post (711), and the outer side of the limiting block (710) is fixedly installed with a tension spring (712).

2. The sleeve power clamp with an automatic straightening mechanism according to claim 1, characterized in that: The movable seat (701), threaded hole two (702), threaded column (703), anti-slip texture (704), connecting block (705), rotating column (706) and straightening clamp (707) are provided in two identical sets, and the two sets of movable seat (701), threaded hole two (702), threaded column (703), anti-slip texture (704), connecting block (705), rotating column (706) and straightening clamp (707) are symmetrically distributed about the vertical center line of the power clamp seat (1).

3. A power sleeve clamp with an automatic straightening mechanism according to claim 1, characterized in that: The diameter of the second threaded hole (702) is the same as that of the first threaded hole (6), and the second threaded hole (702) and the first threaded hole (6) are both compatible with the threaded post (703).

4. A power sleeve clamp with an automatic straightening mechanism according to claim 1, characterized in that: The movable seat (701) has a "]" shaped structure and is adapted to the straightening clamp (707).

5. A power sleeve clamp with an automatic straightening mechanism according to claim 1, characterized in that: The threaded holes (702) are provided in multiple identical sets, and the multiple sets of threaded holes (702) are located on the movable seat (701) and are distributed at equal intervals.

6. A power sleeve clamp with an automatic straightening mechanism according to claim 1, characterized in that: The slide rail (709) and the limiting block (710) are fixedly connected, and the slide rail (709) is adapted to the slide groove (4).

7. A power sleeve clamp with an automatic straightening mechanism according to claim 1, characterized in that: The straightening frame (708), slide rail (709), limiting block (710) and limiting post (711) are provided in two identical sets, and the two sets of the straightening frame (708), slide rail (709), limiting block (710) and limiting post (711) are symmetrically distributed about the vertical center line of the connecting seat (3), and the tension spring (712) is located between the two sets of limiting blocks (710).

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