Automatic seat return mechanism

Abstract

The application discloses a kind of automatic reset mechanism of tooth seat, it is related to oil pipe tongs technical field, including clamp body, slope plate, jaw plate frame, jaw plate, tooth seat, roller shaft assembly and tooth block;Two groups of roller shaft assembly are set in the opposite sides of clamp body, each roller shaft assembly is symmetrically provided with slope plate on both sides, the slope plate is installed in the inner wall of the clamp body, and the thickness of the slope plate is gradually increased;The roller shaft assembly has a guide shaft, and the bottom of the clamp body cavity is provided with a guide groove, one guide groove is provided for each slope plate, and the guide groove is arranged so that when the clamp body and the jaw plate frame rotate relative to each other, the movement path of the guide shaft in the guide groove is the same as the movement path of the roller shaft assembly relative to the slope plate.The cooperation of the guide shaft and the guide groove realizes the automatic reset of the tooth seat, improves the work efficiency under the condition of ensuring the normal work of the oil pipe tongs, and avoids the safety hazard caused by the non-return of the tooth seat.

Description

Technical Field

[0001] This invention relates to the fields of oil and gas drilling and production technology and tubing wrench technology. More specifically, this invention relates to an automatic tooth holder reset mechanism. Background Technology

[0002] In oilfield drilling operations, tubing power tongs are mainly used for coupling and uncoupling of tubing, casing, and drill pipe, connecting each string of pipe into a single unit. These tubing power tongs typically consist of a main tong and a back tong. The main tong and back tong work together to tighten the coupling threads. Both tongs have openings to facilitate the insertion of the tubing string into the center. During operation, the main tong primarily clamps and rotates the tubing string, while the back tong primarily clamps it. When coupling or uncoupling, the jaw base and jaw plate are integrated. As the main tong or back tong head rotates, the jaw base moves towards the center until it clamps the tubing string, achieving the coupling or uncoupling function. After coupling or uncoupling, the main tong or back tong body rotates in the opposite direction to align the openings. At this point, due to structural limitations, the jaw base often passively retracts to its original position using the impact of the tubing string or the centrifugal force of the reverse rotation. In actual operation, the operator often needs to manually push the jaw plate back, which is inconvenient, inefficient, and poses safety hazards. With the increasing demand for automated operations in oilfields, there is an urgent need to solve the problem that the traditional tubing power pliers jaw plate assembly (tooth seat) cannot be retracted. This will provide assistance and a foundation for the automated transformation of tubing power pliers, and improve the operating efficiency and safety of tubing power pliers. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic tooth holder reset mechanism, which achieves automatic tooth holder reset through the cooperation of the guide shaft and the guide groove. While ensuring the normal operation of the oil pipe wrench, it improves work efficiency and avoids the safety hazards caused by the tooth holder not retracting.

[0004] The technical solution adopted by the present invention to solve this technical problem is: an automatic tooth seat reset mechanism, comprising: a clamp body, a ramp, a jaw plate frame, a jaw plate, a tooth seat, a roller shaft assembly, and a tooth block;

[0005] Two sets of roller shaft assemblies are arranged on opposite sides of the clamp body. Each roller shaft assembly has symmetrically arranged slope plates on both sides. The slope plates are installed on the inner wall of the clamp body, and the thickness of the slope plates increases progressively.

[0006] The roller assembly has a guide shaft, and the bottom of the jaw cavity is provided with a guide groove. Each slope plate is provided with a corresponding guide groove. The guide groove is configured such that when the jaw body and the jaw plate frame rotate relative to each other, the movement path of the guide shaft in the guide groove is the same as the movement path of the roller assembly relative to the slope plate.

[0007] Preferably, the automatic tooth seat reset mechanism is characterized in that the guide groove is provided with ramps at both ends to connect the bottom of the forceps cavity with the guide groove.

[0008] Preferably, the automatic tooth seat reset mechanism is characterized in that the roller shaft assembly includes: a roller, a guide shaft, a locking nut, a tension spring, and a roller shaft body;

[0009] The roller is mounted on the roller shaft body and can rotate around the roller shaft body;

[0010] The roller shaft body has a blind hole slide inside, and the outlet end of the blind hole slide has an internal thread. The locking nut is installed through the internal thread to prevent the guide shaft from disengaging from the blind hole slide. The tension spring is placed at the bottom of the blind hole slide, and the guide shaft is installed at the middle position between the locking nut and the tension spring.

[0011] Preferably, the automatic tooth holder reset mechanism is characterized in that the jaw plate frame is located in the forceps body; the jaw plate and the tooth holder are installed in the jaw plate frame; the roller shaft assembly is installed at the tail of the jaw plate; and the tooth block is installed on the tooth holder.

[0012] Preferably, the automatic tooth seat reset mechanism is characterized in that the jaw plate and the tooth seat are installed in the jaw plate frame slide groove, the tooth seat and the jaw plate are connected by a T-slot, and the tooth block is installed on the tooth seat by a dovetail groove and a threaded pin.

[0013] Preferably, the automatic tooth seat reset mechanism is characterized in that an opening ramp is provided at the opening of the clamp body, and the opening ramp is connected to the guide groove.

[0014] The present invention has at least the following beneficial effects:

[0015] 1. By setting guide grooves on the clamp body that correspond to the slope plate, it can adapt to different specifications of climbing-type hydraulic pipe power clamps, and has good versatility.

[0016] 2. Through the cooperation of the guide shaft and the guide groove, the automatic reset of the oil pipe power clamp jaw seat can be realized, avoiding the operation of inertial swing back or manual push back, meeting the needs of automation transformation, avoiding the phenomenon of the jaw seat grabbing or snagging the pipe during operation, and improving safety.

[0017] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0018] Figure 1 This is a top view of the main body of the automatic tooth socket reset mechanism of the present invention;

[0019] Figure 2 This is a cross-sectional view of the AA structure in an automatic tooth socket resetting mechanism of the present invention;

[0020] Figure 3 This is a top view of the clamp body in an automatic tooth socket reset mechanism of the present invention;

[0021] Figure 4 This is a cross-sectional view of the BB structure of the clamp body in an automatic tooth socket reset mechanism of the present invention;

[0022] In the diagram: 1. Jaw body; 2. Slope plate; 3. Roller; 4. Roller shaft assembly; 41. Guide shaft; 42. Locking nut; 43. Spring; 44. Roller shaft; 5. Jaw plate frame; 6. Jaw plate; 7. Tooth base; 8. Tooth block; 9. Guide groove; 10. Opening ramp; 11. Inclined slope. Detailed Implementation

[0023] The present invention will now be described in detail and completely with reference to the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention with reference to the accompanying drawings, it should be particularly noted that the technical solutions and features provided in various parts of the present invention, including the following description, can be combined with each other without conflict.

[0024] Furthermore, the embodiments of the present invention described below are generally only some, not all, of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The specific implementation process is as follows:

[0026] An automatic tooth socket resetting mechanism, such as Figure 1 As shown, it includes: jaw body 1, ramp 2, jaw plate frame 5, jaw plate 6, tooth base 7, roller shaft assembly 4, and tooth block 8;

[0027] Furthermore, the ramp 2 is installed on the inner wall of the jaw body 1; the jaw plate frame 5 rotates relative to the center of the jaw body 1; the jaw plate 6 and the tooth holder 7 are installed in the slide groove of the jaw plate frame 5; the roller shaft assembly 4 is installed at the tail of the jaw plate 6; and the tooth block 8 is installed on the tooth holder 7. Two jaw plates 6 and two tooth holders 7 are symmetrically distributed on the jaw plate frame 5, and two tooth blocks 8 are symmetrically distributed on each tooth holder 7.

[0028] In the above technical solution, the inner wall of the clamp body 1 has mounting holes for the ramp plates 2, and the ramp plates 2 are distributed around its inner wall. During operation, when the jaw plate frame 5 or the clamp body 1 is rotated relative to each other by power, the roller 3 is squeezed by the working surface of the ramp plate 2 and makes a climbing motion. At this time, the tooth seat 7, jaw plate 6 and tooth block 8 are fixed together as one unit. Driven by the roller 3, they converge towards the center along the sliding groove of the jaw plate frame 5, thereby clamping the tube column to be processed or driving the tube column to continue to rotate and reciprocate after clamping.

[0029] Furthermore, two sets of roller shaft assemblies 4 are arranged on opposite sides inside the jaw body 1. Each roller shaft assembly 4 has symmetrically arranged slope plates 2 on both sides. The slope plates 2 are installed on the inner wall of the jaw body 1, and the thickness of the slope plates 2 gradually increases to drive the roller shaft assembly 4 to move towards the center of the jaw body 1. The roller shaft assembly 4 is installed on the jaw plate 6, and the jaw plate 6 is installed in the slide groove of the jaw plate frame 5. The jaw plate 6 can move along the side wall of the slide groove of the jaw plate frame 5 towards the center of the jaw body.

[0030] like Figure 2 As shown, the roller shaft assembly 4 has a guide shaft 41, and the bottom of the jaw body 1 is provided with a guide groove 9. Each slope plate 2 is provided with a corresponding guide groove 9. The guide groove 9 is configured such that when the jaw body 1 and the jaw plate frame 5 rotate relative to each other, the movement path of the guide shaft 41 in the guide groove 9 is the same as the movement path of the roller shaft assembly 4 relative to the slope plate 2.

[0031] In the above technical solution, when the roller 3 performs the climbing motion, the guide shaft 41 moves along the predetermined path of the guide groove 9. After the climbing motion of the roller 3 is completed, the relative rotational motion of the jaw plate frame 5 and the jaw body 1 reverses. Under the drive of the rotational torque, a squeezing force is formed on the side of the guide groove 9, causing the guide shaft 41 to perform the climbing motion within the guide groove 9, thereby driving the jaw seat 7 back to its initial position. Through the cooperation of the guide shaft 41 and the guide groove 9, the automatic reset of the hydraulic power jaw seat can be achieved, avoiding the operation of inertial swing back or manual push back, meeting the needs of automation transformation, avoiding the phenomenon of the jaw seat grabbing or snagging the pipe during operation, and improving safety.

[0032] Furthermore, such as Figure 3-4 As shown, the guide groove 9 has ramps 11 at both ends to connect the bottom of the clamp body 1 cavity with the guide groove 9.

[0033] In the above technical solution, the guide shaft 41 can be moved to the contact surface between the forceps 1 and the jaw plate frame 5 by means of the ramp 11. When the openings of the forceps 1 and the jaw plate frame 5 are aligned, the guide shaft 41 has climbed away from the guide groove 9 via the ramp 11. At this time, the tooth holder 7 can be manually pulled to slide out of the groove of the jaw plate frame 5, thereby realizing the replacement of different tooth blocks 8 and tooth holders 7 according to different column specifications.

[0034] Furthermore, such as Figure 2 As shown, the roller shaft assembly 4 includes: roller 3, guide shaft 41, locking nut 42, tension spring 43 and roller shaft body 44;

[0035] The roller 3 is mounted on the roller shaft body 44, and the roller 3 can rotate around the roller shaft body 44;

[0036] The roller shaft body 44 has a blind hole slide inside, and the outlet end of the blind hole slide has an internal thread. The locking nut 42 is installed through the internal thread. The tension spring 43 is placed at the bottom of the blind hole slide, and the guide shaft 41 is installed at the middle position between the locking nut 42 and the tension spring 43.

[0037] In the above technical solution, when the jaw plate frame 5 and the jaw body 1 rotate relative to each other, the guide shaft 41 always tends to move outward under the influence of the tension spring 43. In order to adapt to the height of the guide groove 9 and the contact surface between the jaw body 1 and the jaw plate frame 5, the guide shaft 41 will slide back and forth in the slide of the roller shaft body 44 with the help of the tension spring 43 and the external force (the pressure of the jaw body 1 on the guide shaft 41).

[0038] Furthermore, the jaw plate 6 and the tooth holder 7 are installed in the sliding groove of the jaw plate frame 5. The tooth holder 7 is connected to the jaw plate 6 through a T-slot, and the tooth block 8 is installed on the tooth holder 7 through a dovetail groove and a threaded pin. The tooth holder 7, jaw plate 6, and tooth block 8 are connected as a whole, which facilitates the entire assembly returning to its initial position.

[0039] Furthermore, such as Figure 3-4 As shown, the opening of the clamp body 1 is provided with an opening ramp 10, which is connected to the guide groove 9. Its function is to facilitate the guide shaft 41 to return to the guide groove 9 through the opening ramp 10 after it leaves the guide groove 9.

[0040] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and embodiments shown and described herein.

Claims

1. An automatic tooth socket resetting mechanism, characterized in that, include: Jaw body, bevel plate, jaw plate frame, jaw plate, tooth holder, roller shaft assembly and tooth block; Two sets of roller shaft assemblies are arranged on opposite sides of the clamp body. Each roller shaft assembly has symmetrically arranged slope plates on both sides. The slope plates are installed on the inner wall of the clamp body, and the thickness of the slope plates increases progressively. The roller assembly has a guide shaft, and the bottom of the jaw cavity is provided with a guide groove. Each slope plate is provided with a corresponding guide groove. The guide groove is configured such that when the jaw body and the jaw plate frame rotate relative to each other, the movement path of the guide shaft in the guide groove is the same as the movement path of the roller assembly relative to the slope plate. The guide groove is provided with ramps at both ends to connect the bottom of the clamp body cavity to the guide groove; The roller shaft assembly includes: rollers, guide shafts, lock nuts, tension springs, and roller shaft bodies; The roller is mounted on the roller shaft body and can rotate around the roller shaft body; The roller shaft body has a blind hole slide inside, and a locking nut is installed at the outlet end of the blind hole slide to prevent the guide shaft from disengaging from the blind hole slide; the tension spring is placed at the bottom of the blind hole slide, and the guide shaft is installed at the middle position between the locking nut and the tension spring.

2. The automatic tooth socket reset mechanism according to claim 1, characterized in that, The blind hole slide outlet end is provided with an internal thread, and the locking nut is installed through the internal thread.

3. The automatic tooth socket reset mechanism according to claim 1, characterized in that, The jaw plate frame is located within the jaw body; the jaw plate and the tooth holder are mounted in the jaw plate frame; the roller shaft assembly is mounted at the tail of the jaw plate; and the tooth block is mounted on the tooth holder.

4. The automatic tooth socket reset mechanism according to claim 3, characterized in that, The jaw plate and the tooth holder are installed in the jaw plate frame slide groove. The tooth holder and the jaw plate are connected by a T-slot. The tooth block is installed on the tooth holder by a dovetail groove and a threaded pin.

5. The automatic tooth socket reset mechanism according to claim 1, characterized in that, The opening of the clamp body is provided with an opening ramp, which is connected to the guide groove.

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