A steel solid sucker rod inverted anti-reversal device

Abstract

The present invention discloses a steel solid sucker rod inverted anti-reversal device, which relates to the technical field of sucker rod auxiliary tools. It comprises a brake bottom ring and a sucker rod body, wherein the brake bottom ring is used to be fixed on the wellhead, a brake bottom block is fixedly installed inside the brake bottom ring, and a driving ring is rotatably connected to the center position of the brake bottom block. The invention installs the sucker rod on the driving ring, and then uses the positioning component and the stabilizing component in coordination to make the sucker rod close to the driving ring, thereby avoiding position changes caused by vibration or external force during operation. At the same time, the anti-reversal tooth block on the driving ring is used in coordination with the brake block to effectively avoid the reverse state of the sucker rod body, and then the torsion of the buffer torsion spring is adjusted by the adjusting component, so that the torsion generated by the buffer torsion spring can buffer the impact force generated by the sucker rod body when the reverse occurs, thereby effectively improving the safety of the anti-reversal device.

Description

Technical Field

[0001] The invention relates to the technical field of sucker rod auxiliary tools, in particular to a steel solid sucker rod inverted anti-reversal device. Background Art

[0002] When using a wellbore pump for oil production, the pump is lowered into the tubing and pumps oil by moving up and down. A sucker rod is connected to the pump to drive it upward. As oilfield development and production enter the middle and late stages, sand production in the formation often becomes more severe. Once entering the wellbore, the sucker rod or the pump piston can become buried in sand and become stuck. This necessitates removing the tubing, and before removing the tubing, the sucker rod must be removed. This requires reverse-threading the sucker rod, rotating it in the opposite direction to separate the threads between the two rod sections.

[0003] In the prior art, a Chinese patent with publication number "CN112324363B" discloses a sucker rod inverted anti-reversal device, which fixes the brake base to the wellhead as a force-bearing basis to prevent the sucker rod from reversing. The sucker rod clamp can clamp the sucker rod through the clamping block and the clamping teeth to fix the sucker rod on the sucker rod, and cooperates with the sucker rod holder to prevent rotation. The one-way rotation structure can ensure the normal inverted operation of the sucker rod, and when the sucker rod fails to be inverted and is about to reverse, the sucker rod holder is braked relative to the brake base, thereby preventing the sucker rod from reversing, solving the problem in the prior art that the sucker rod is prone to reversal and poses a safety hazard when it is inverted.

[0004] During the use of existing sucker rods, the sucker rods are usually clamped with pipe clamps or hydraulic clamps in conjunction with special tools, and then the reverse torque is applied to perform the reverse operation. However, when the sucker rod is in a reversed state, although the sucker rod itself is relatively soft and can effectively buffer the generated reverse force, some of the reverse force will still act on the pipe clamps or hydraulic clamps and special tools, which will cause damage to or failure of these tools. At the same time, the sucker rod is long. When the sucker rod is pulled out, the contact between the sucker rod tools is small, and the sucker rod itself is relatively soft. When the sucker rod is in a descending state, it is easy to bend significantly, which can easily cause damage to the sucker rod. Therefore, the present invention proposes a steel solid sucker rod reverse anti-reversal device to solve the above-mentioned problems. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a steel solid sucker rod inverted anti-reversal device, which solves the problems mentioned in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A steel solid sucker rod inverted anti-reversal device comprises a brake bottom ring and a sucker rod body. The brake bottom ring is used to be fixed to the wellhead. A brake bottom block is fixedly installed inside the brake bottom ring. The center position of the brake bottom block is rotatably connected to a drive ring. The brake bottom block is provided with a positioning assembly and a stabilizing assembly. The positioning assembly and the stabilizing assembly cooperate to confine the sucker rod body inside the drive ring.

[0008] An anti-reversal component is provided inside the brake bottom block, and the anti-reversal component prevents the sucker rod body from reversing.

[0009] Preferably, the anti-reverse component includes an anti-reverse tooth block fixedly mounted on the drive ring, a mounting groove is provided on the side end face of the brake bottom block, an adjustment component is provided inside the mounting groove, a rotating block is provided on the adjustment component, a brake block is fixedly mounted on the side end face of the rotating block, and the anti-reverse effect is achieved by the brake block being clamped between the anti-reverse tooth blocks.

[0010] Preferably, the adjustment assembly includes a brake groove arranged inside the mounting groove, the brake groove is rotatably connected to a brake threaded shaft inside, the rotating block is fixedly mounted on the brake threaded shaft, the brake threaded shaft is threadedly connected to an adjusting nut, the adjusting nut is threadedly mounted with a positioning bolt, and the end of the positioning bolt extends to the interior of the brake threaded shaft.

[0011] Preferably, a buffer torsion spring is fixedly mounted on the adjusting nut, and one end of the buffer torsion spring away from the adjusting nut is fixedly connected to the inside of the brake groove, and the buffer torsion spring is located outside the brake threaded shaft.

[0012] Preferably, the positioning assembly includes a rotating plate fixedly mounted on the driving ring, four positioning plates fixedly mounted on the rotating plate, a second bearing fixedly mounted on each of the four positioning plates, a threaded barrel fixedly mounted on the second bearing, a threaded rod movably connected inside the threaded barrel, a first bearing fixedly mounted on the end of the threaded rod, and a limiting top block fixedly mounted on the first bearing.

[0013] Preferably, a rotating ring is rotatably connected on the rotating plate and inside the positioning plate, the upper end face of the rotating ring is set as a driving bevel gear, and a driven bevel gear is fixedly installed on the outer side of the threaded cylinder, and the driving bevel gear is meshed with the driven bevel gear.

[0014] Preferably, a positioning slide is fixedly installed on the side end face of the limiting top block, and a stabilizing plate is fixedly installed on the rotating plate and on the inner side of the rotating ring. A positioning groove for use with the positioning slide is provided on the stabilizing plate, and the positioning slide is slidably connected to the positioning groove.

[0015] Preferably, the stabilizing component includes a U-shaped frame rod fixedly mounted on the limiting top block, the inner side of the U-shaped frame rod is provided with a rotation groove, the internal rotation of the rotation groove is connected to a rotation shaft, and the end of the rotation shaft away from the rotation groove is fixedly mounted with a pressing top plate.

[0016] Preferably, a return torsion spring is fixedly connected to the rotating shaft, and one end of the return torsion spring away from the rotating shaft is fixedly connected to the inside of the rotating groove. A limit baffle is fixedly installed on the stabilizing plate, and the position of the pressed top plate is limited by the limit baffle.

[0017] Preferably, a limiting ring is fixedly mounted on the side end surface of the driving ring, and a limiting groove for use with the limiting ring is provided on the inner side surface of the braking bottom block, and the limiting ring is movably connected to the limiting groove.

[0018] The present invention provides a steel solid sucker rod inverted anti-reversal device. Compared with the prior art, it has the following advantages:

[0019] 1. The present invention installs the sucker rod body on the driving ring. When the sucker rod body rotates, the driving ring is synchronously driven to rotate on the brake bottom block. At the same time, the driving ring drives the anti-reverse gear block to rotate when rotating. When the sucker rod body reverses, the driving ring drives the anti-reverse gear block to rotate. The anti-reverse gear block cooperates with the brake block to effectively prevent the sucker rod body from reversing. When the anti-reverse gear block contacts the brake block, the torsion generated by the buffer torsion spring is used to effectively buffer the impact force generated by the anti-reverse gear block, thereby preventing the sucker rod body from being damaged due to sudden reversal. This effectively improves the safety of the anti-reversal device.

[0020] 2. In the present invention, the adjusting nut is rotated to move on the brake threaded shaft. The torsion of the buffer torsion spring can be adjusted by the movement of the adjusting nut, which can achieve precise adjustment of the torsion of the buffer torsion spring, avoiding excessive impact and wear, thereby helping to extend the service life of the equipment and reduce maintenance frequency and cost;

[0021] 3. In the present invention, the rotating ring is driven and the active bevel gear and the driven bevel gear on the rotating ring are used in conjunction to synchronously adjust the rotation of the four threaded barrels. When the threaded barrel rotates, the threaded rod in the threaded barrel will be adjusted to the horizontal position through the cooperation of the positioning slide and the positioning slide groove, and then the position of the sucker rod body is limited by the limiting top block on the threaded rod. The position of the sucker rod body can be effectively limited by the limiting top block, avoiding position changes caused by vibration or external force during operation, and improving the stability and safety of the device.

[0022] 4. In the present invention, when the limiting top block moves inward, the fixed top plate on the limiting top block will first contact the sucker rod body. When the fixed top plate continues to move inward, the fixed top plate will be affected by the rotating shaft and rotate. When the rotating shaft rotates, the return torsion spring will rotate. The reaction force generated by the return torsion spring is used to press the fixed top plate onto the sucker rod body, effectively enhancing the limiting effect of the limiting top block. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 Schematic diagram of the internal structure of the drive ring in the present invention;

[0025] Figure 3 is a cross-sectional view of the drive ring of the present invention;

[0026] Figure 4 Schematic diagram of the structure of the drive ring in the present invention;

[0027] Figure 5 Schematic diagram of the structure of the regulating component in the present invention;

[0028] Figure 6 Schematic diagram of the structure of the rotating plate in the present invention;

[0029] Figure 7 Schematic diagram of the structure of the limiting top block in the present invention;

[0030] Figure 8 is a cross-sectional view of the threaded barrel of the present invention;

[0031] Figure 9 It is a cross-sectional view of the U-shaped frame rod in the present invention.

[0032] In the figure: 1. Brake bottom ring; 2. Brake bottom block; 3. Drive ring; 4. Anti-reverse gear block; 5. Mounting groove; 6. Rotating block; 7. Brake block; 8. Brake groove; 9. Brake threaded shaft; 10. Adjusting nut; 11. Buffer torsion spring; 12. Rotating plate; 13. Positioning plate; 14. Second bearing; 15. Threaded cylinder; 16. Threaded rod; 17. Limiting top block; 18. Rotating ring; 19. Active bevel gear; 20. Driven bevel gear; 21. Positioning slide; 22. Stabilizing plate; 23. Positioning slide groove; 24. U-shaped frame rod; 25. Rotating groove; 26. Rotating shaft; 27. Pressing top plate; 28. Reset torsion spring; 29. ​​Limit baffle; 30. Limiting ring; 31. Limiting groove; 32. Positioning bolt; 33. First bearing; 34. Sucker rod body. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Example 1:

[0035] See also Figure 1-9 The present invention is a steel solid sucker rod inverted anti-reversal device, comprising a brake bottom ring 1 and a sucker rod body 34. The brake bottom ring 1 is used to be fixed to the wellhead, and a brake bottom block 2 is fixedly installed inside the brake bottom ring 1. The center position of the brake bottom block 2 is rotatably connected to the driving ring 3. A positioning component and a stabilizing component are provided on the brake bottom block 2. The sucker rod body 34 is limited to the inside of the driving ring 3 by the coordinated use of the positioning component and the stabilizing component. A limiting ring 30 is fixedly installed on the side end surface of the driving ring 3. A limiting groove 31 is provided on the inner side surface of the brake bottom block 2 for use with the limiting ring 30. The limiting ring 30 is movably connected to the limiting groove 31. The limiting ring 30 is limited in the limiting groove 31 to ensure the stability of the driving ring 3 on the brake bottom block 2 and to ensure that the driving ring 3 will not deviate from its position when rotating.

[0036] An anti-reverse component is provided inside the brake bottom block 2, which prevents the sucker rod body 34 from reversing. The anti-reverse component includes an anti-reverse tooth block 4 fixedly mounted on the drive ring 3, and a mounting groove 5 is provided on the side end face of the brake bottom block 2. An adjustment component is provided inside the mounting groove 5, and a rotating block 6 is provided on the adjusting component. A brake block 7 is fixedly mounted on the side end face of the rotating block 6, and the anti-reverse effect is achieved by clamping the brake block 7 between the anti-reverse tooth blocks 4.

[0037] In this embodiment, by installing the sucker rod body 34 on the drive ring 3, when the sucker rod body 34 rotates, it will synchronously drive the drive ring 3 to rotate on the brake bottom block. At the same time, the drive ring 3 will drive the anti-reverse tooth block 4 to rotate when rotating. When the sucker rod body 34 reverses, the drive ring 3 is used to drive the anti-reverse tooth block 4 to rotate, and then the anti-reverse tooth block 4 is used in conjunction with the brake block 7 to effectively avoid the reversal of the sucker rod body 34. When the anti-reverse tooth block 4 contacts the brake block 7, the torsion generated by the buffer torsion spring 11 is used to effectively buffer the impact force generated by it, thereby avoiding the sudden reversal of the sucker rod body 34 and causing damage to it, thereby effectively improving the safety of the anti-reversal device.

[0038] Example 2:

[0039] See also Figure 1-9On the basis of embodiment 1, the adjusting component includes a brake groove 8 arranged inside the mounting groove 5, and the brake groove 8 is rotatably connected to the inside of the brake threaded shaft 9. The rotating block 6 is fixedly installed on the brake threaded shaft 9, and the brake threaded shaft 9 is threadedly connected to an adjusting nut 10. A positioning bolt 32 is threadedly installed on the adjusting nut 10, and the end of the positioning bolt 32 extends to the inside of the brake threaded shaft 9. A buffer torsion spring 11 is fixedly installed on the adjusting nut 10, and the end of the buffer torsion spring 11 away from the adjusting nut 10 is fixedly connected to the inside of the brake groove 8. The position of the buffer torsion spring 11 is on the outside of the brake threaded shaft 9. When the adjusting nut 10 rotates, the torsion of the buffer torsion spring 11 is adjusted, and the position of the adjusting nut 10 is fixed by the positioning bolt 32 to prevent the adjusting nut 10 from being subjected to the reaction force of the buffer torsion spring 11 and causing the adjusting nut 10 to rotate.

[0040] In this embodiment, the adjusting nut 10 is rotated to move the adjusting nut 10 on the brake threaded shaft 9. The torsion of the buffer torsion spring 11 can be adjusted by the movement of the adjusting nut 10, thereby achieving precise adjustment of the torsion of the buffer torsion spring 11 and avoiding excessive impact and wear, thereby helping to extend the service life of the equipment and reduce maintenance frequency and cost.

[0041] Example 3:

[0042] See also Figure 1-9 On the basis of the second embodiment, the positioning assembly includes a rotating plate 12 fixedly mounted on the driving ring 3, four positioning plates 13 fixedly mounted on the rotating plate 12, a second bearing 14 fixedly mounted on each of the four positioning plates 13, a threaded cylinder 15 fixedly mounted on the second bearing 14, a threaded rod 16 movably connected to the inside of the threaded cylinder 15, a first bearing 33 fixedly mounted on the end of the threaded rod 16, a limited top block 17 fixedly mounted on the first bearing 33, a rotating ring 18 rotatably connected to the rotating plate 12 and located inside the positioning plate 13, and the upper end surface of the rotating ring 18 is set as an active inclined surface Bevel gear 19, the outer side surface of the threaded cylinder 15 is fixedly mounted with a driven bevel gear 20, the active bevel gear 19 is meshed with the driven bevel gear 20, the side end surface of the limiting top block 17 is fixedly mounted with a positioning slide 21, and a stabilizing plate 22 is fixedly mounted on the rotating plate 12 and on the inner side of the rotating ring 18. The stabilizing plate 22 is provided with a positioning groove 23 for use with the positioning slide 21, and the positioning slide 21 is slidably connected to the positioning groove 23. The positioning slide 21 is positioned and slid in the positioning groove 23 by the positioning slide 21 to ensure that the threaded rod 16 can push the limiting top block 17 to move horizontally when it rotates.

[0043] In this embodiment, by driving the rotating ring 18, the active bevel gear 19 and the driven bevel gear 20 on the rotating ring 18 are used in conjunction with each other to synchronously adjust the rotation of the four threaded barrels 15. When the threaded barrel 15 rotates, the threaded rod 16 in the threaded barrel 15 will be adjusted to a horizontal position through the cooperation of the positioning slide 21 and the positioning groove 23, and then the position of the sucker rod body 34 is limited by the limiting top block 17 on the threaded rod 16. The limiting top block 17 can effectively limit the position of the sucker rod body 34, thereby avoiding position changes caused by vibration or external force during operation, and improving the stability and safety of the device.

[0044] Example 4:

[0045] See also Figure 1-9 On the basis of embodiment three, the stabilizing assembly includes a U-shaped frame rod 24 fixedly mounted on the limiting top block 17, and the inner side surface of the U-shaped frame rod 24 is provided with a rotating groove 25, and the internal rotation of the rotating groove 25 is connected to a rotating shaft 26, and the end of the rotating shaft 26 away from the rotating groove 25 is fixedly mounted with a pressing top plate 27, and the rotating shaft 26 is fixedly connected to a return torsion spring 28, and the end of the return torsion spring 28 away from the rotating shaft 26 is fixedly connected to the inside of the rotating groove 25, and a limiting baffle 29 is fixedly mounted on the stabilizing plate 22, and the position of the pressing top plate 27 is limited by the limiting baffle 29, wherein the friction between the pressing top plate 27, the limiting top block 17 and the sucker rod body 34 is small, which effectively ensures that the sucker rod body 34 can be normally lifted and lowered during work, wherein the end heads of the limiting top block 17 and the pressing top plate 27 are both set to arc surfaces, which are convenient for fitting with the surface of the sucker rod body 34.

[0046] In this embodiment, when the limiting top block 17 moves inward, the fixed top plate 27 on the limiting top block 17 will first contact the sucker rod body 34. When the fixed top plate 27 continues to move inward, the fixed top plate 27 will be affected by the rotating shaft 26 and rotate. When the rotating shaft 26 rotates, the return torsion spring 28 will rotate. The reaction force generated by the return torsion spring 28 is used to press the fixed top plate 27 onto the sucker rod body 34, effectively enhancing the limiting effect of the limiting top block 17.

[0047] Working principle:

[0048] During use, by driving the rotating ring 18, the active bevel gear 19 on the rotating ring 18 cooperates with the driven bevel gear 20 to synchronously adjust the rotation of the four threaded barrels 15. When the threaded barrel 15 rotates, the threaded rod 16 in the threaded barrel 15 will adjust its horizontal position through the cooperation of the positioning slide 21 and the positioning groove 23, and then the position of the sucker rod body 34 is limited by the limiting top block 17 on the threaded rod 16. The limiting top block 17 can effectively limit the position of the sucker rod body 34, avoiding position changes caused by vibration or external force during operation.

[0049] When the limiting top block 17 moves inward, the pressing top plate 27 on the limiting top block 17 will first contact the sucker rod body 34. When the pressing top plate 27 continues to move inward, the pressing top plate 27 will be affected by the rotating shaft 26 and rotate. When the rotating shaft 26 rotates, the return torsion spring 28 will rotate. The reaction force generated by the return torsion spring 28 is used to press the pressing top plate 27 on the sucker rod body 34, effectively enhancing the limiting effect of the limiting top block 17.

[0050] By inserting the sucker rod body 34 into the drive ring 3, when the sucker rod body 34 rotates, it will synchronously drive the drive ring 3 to rotate on the brake bottom block 2. At the same time, the drive ring 3 will drive the anti-reverse gear block 4 to rotate when rotating. When the sucker rod body 34 reverses, the drive ring 3 drives the anti-reverse gear block 4 to rotate, and then the anti-reverse gear block 4 cooperates with the brake block 7 to effectively prevent the sucker rod body 34 from reversing. When the anti-reverse gear block 4 contacts the brake block 7, the torsion generated by the buffer torsion spring 11 is used to effectively buffer the impact force generated by them, thereby preventing the sucker rod body 34 from being suddenly reversed and causing damage to it.

[0051] By rotating the adjusting nut 10, the adjusting nut 10 is moved on the brake threaded shaft 9. The torsion of the buffer torsion spring 11 can be adjusted by the movement of the adjusting nut 10, which can achieve precise adjustment of the torsion of the buffer torsion spring 11, avoiding excessive impact and wear, thereby helping to extend the service life of the equipment.

[0052] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0053] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A steel solid sucker rod undercut anti-reversal device, comprising a brake bottom ring (1) and a sucker rod body (34), characterized in that: The brake bottom ring (1) is used to be fixed at the wellhead, a brake bottom block (2) is fixedly installed inside the brake bottom ring (1), a driving ring (3) is rotatably connected to the center of the brake bottom block (2), and a positioning component and a stabilizing component are provided on the brake bottom block (2), and the sucker rod body (34) is confined inside the driving ring (3) by the coordinated use of the positioning component and the stabilizing component; An anti-reversal component is arranged inside the brake bottom block (2), and the anti-reversal component is used to prevent the sucker rod body (34) from reversing. The anti-reverse component comprises an anti-reverse tooth block (4) fixedly mounted on the drive ring (3); a mounting groove (5) is provided on the side end surface of the brake bottom block (2); an adjustment component is arranged inside the mounting groove (5); a rotating block (6) is arranged on the adjustment component; a brake clamping block (7) is fixedly mounted on the side end surface of the rotating block (6); and an anti-reverse effect is achieved by the brake clamping block (7) being clamped between the anti-reverse tooth blocks (4); The positioning assembly comprises a rotating plate (12) fixedly mounted on the driving ring (3), four positioning plates (13) fixedly mounted on the rotating plate (12), second bearings (14) fixedly mounted on the four positioning plates (13), a threaded cylinder (15) fixedly mounted on the second bearing (14), a threaded rod (16) movably connected inside the threaded cylinder (15), a first bearing (33) fixedly mounted on the end of the threaded rod (16), and a limiting top block (17) fixedly mounted on the first bearing (33); A rotating ring (18) is rotatably connected to the rotating plate (12) and located inside the positioning plate (13); the upper end surface of the rotating ring (18) is provided as a driving bevel gear (19); a driven bevel gear (20) is fixedly mounted on the outer side surface of the threaded cylinder (15); the driving bevel gear (19) meshes with the driven bevel gear (20); A positioning slide plate (21) is fixedly mounted on the side end surface of the limiting top block (17); a stabilizing plate (22) is fixedly mounted on the rotating plate (12) and on the inner side of the rotating ring (18); a positioning slide groove (23) for use with the positioning slide plate (21) is formed on the stabilizing plate (22); and the positioning slide plate (21) is slidably connected to the positioning slide groove (23); The stabilizing component comprises a U-shaped frame rod (24) fixedly mounted on the limiting top block (17); a rotation groove (25) is provided on the inner side surface of the U-shaped frame rod (24); a rotation shaft (26) is rotatably connected inside the rotation groove (25); and a pressing top plate (27) is fixedly mounted on one end of the rotation shaft (26) away from the rotation groove (25); A return torsion spring (28) is fixedly connected to the rotating shaft (26); one end of the return torsion spring (28) away from the rotating shaft (26) is fixedly connected to the inside of the rotating groove (25); a limit baffle (29) is fixedly installed on the stabilizing plate (22); and the position of the pressing top plate (27) is limited by the limit baffle (29); A limiting ring (30) is fixedly mounted on the side end surface of the driving ring (3), and a limiting groove (31) for use with the limiting ring (30) is provided on the inner side surface of the braking bottom block (2), and the limiting ring (30) is movably connected to the limiting groove (31).

2. The steel solid sucker rod undercut anti-reversal device according to claim 1, characterized in that: The adjustment assembly comprises a braking groove (8) arranged inside the mounting groove (5); a braking threaded shaft (9) is rotatably connected inside the braking groove (8); the rotating block (6) is fixedly mounted on the braking threaded shaft (9); an adjusting nut (10) is threadedly connected to the braking threaded shaft (9); a positioning bolt (32) is threadedly mounted on the adjusting nut (10); and the end of the positioning bolt (32) extends into the interior of the braking threaded shaft (9).

3. The steel solid sucker rod undercut anti-reversal device according to claim 2, characterized in that: A buffer torsion spring (11) is fixedly mounted on the adjusting nut (10); one end of the buffer torsion spring (11) away from the adjusting nut (10) is fixedly connected to the inside of the brake groove (8); and the buffer torsion spring (11) is located outside the brake threaded shaft (9).

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