Double-end bolt for horizontal adjustment device of petroleum workover rig slide

Abstract

The utility model discloses a double -end bolt for petroleum workover rig slide horizontal adjusting device relates to mechanical adjusting device technical field, including double -end bolt body, slide connecting pipe and derrick connecting pipe, the slide connecting pipe fixed connection in the trolley slide, and double -end bolt body connects between the slide connecting pipe and derrick connecting pipe, the middle of double -end bolt body is provided with the adjusting end, and double -end bolt body left side screw thread connection is in the slide connecting pipe inside, and double -end bolt body right side screw thread connection is in the derrick connecting pipe inside, double -end bolt body left side is provided with the joint end, and the joint end inside is provided with the joint ball, and the joint ball is connected in the slide connecting pipe inside and constitutes fixed structure. This double -end bolt for petroleum workover rig slide horizontal adjusting device solves the problem that traditional double -end bolt is easy to loosen, the triple anti -loose structure makes the loosening rate reduce under the vibration condition, and the horizontal adjustment precision improves, is applicable to the stable adjustment of petroleum workover rig slide.

Description

Technical Field

[0001] This utility model relates to the field of mechanical adjustment device technology, specifically a double-ended bolt for a horizontal adjustment device of an oil well workover rig slide. Background Technology

[0002] Leveling the workover rig's slideway is a crucial step in ensuring safe and efficient workover operations. Adjusting the slideway's level ensures the vertical movement of equipment such as the traveling block and lifting rings, preventing deformation of the derrick or wear of components due to uneven loading. Hydraulic jacks or auger adjusters are commonly used, along with a level for real-time monitoring. This allows for rapid calibration when the well site is uneven or equipment has shifted. Adjustment reduces tripping resistance and wire rope wear, making it an essential step before workover rig installation, commissioning, and operation. It directly impacts workover accuracy and equipment lifespan. However, existing adjustment devices still have certain problems in use: For example, the technical solution of the oil well workover rig sliding level adjustment device with application number 201220201379.9 is as follows: it includes an adjustment rod and an adjustment end. The adjustment rod is a double-ended bolt, one end of which is fixedly connected to the slide rail of the trolley through the sliding rail connecting pipe, and the other end is fixedly connected to the derrick through the derrick connecting pipe. The adjustment end is provided in the middle of the adjustment rod and is fixedly connected to the adjustment rod. In the prior art, the adjustment of the double-ended bolt mostly relies on the self-locking of the nut and bolt threads, lacking an anti-loosening structure. Under vibration conditions, the threaded pair is subjected to periodic alternating loads, which easily causes loosening and creep, resulting in the attenuation of the preload.

[0003] In view of this, in-depth research was conducted on the above issues, which led to the creation of this case.

[0004] To address the aforementioned issues, an innovative design was implemented based on the existing adjustment device. Utility Model Content

[0005] The purpose of this utility model is to provide a double-ended bolt for the level adjustment device of the slide rail of an oil well workover rig, so as to solve the problem of double-ended bolts being prone to loosening mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A double-ended bolt for a leveling device of an oil well workover rig slideway includes a double-ended bolt body, a slideway connecting pipe, and a derrick connecting pipe. The slideway connecting pipe is fixedly connected to the trolley slideway, and the double-ended bolt body is connected between the slideway connecting pipe and the derrick connecting pipe. An adjusting end is provided in the middle of the double-ended bolt body, and the left side of the double-ended bolt body is threadedly connected to the inside of the slideway connecting pipe, and the right side of the double-ended bolt body is threadedly connected to the inside of the derrick connecting pipe. A snap-fit ​​end is provided on the left side of the double-ended bolt body, and a snap-fit ​​ball is provided inside the snap-fit ​​end, which snaps into the inside of the slideway connecting pipe to form a fixed structure.

[0007] Preferably, a groove is provided on the left side inside the slide connecting pipe, and circular grooves are provided on the upper and lower sides of the inner wall of the slide connecting pipe.

[0008] Using the above technical solution, the grooves and circular slots inside the slide connecting pipe form multi-level locking points, providing precise positioning for the inclined locking head and locking ball of the locking end. The smoother inner wall improves the connection stability and avoids axial movement of the double-ended bolt body under vibration conditions.

[0009] Preferably, the double-ended bolt body has threaded structures on both the left and right sides, and a spring is fixedly connected to the left side of the threaded structure on the left side of the double-ended bolt body.

[0010] Using the above technical solution, the spring on the left side of the double-ended bolt body can provide continuous preload, compensate for the preload attenuation caused by vibration of the thread pair, and at the same time, the spring's buffering effect reduces rigid impact between threads, extending the bolt's service life.

[0011] Preferably, the spring has a snap-fit ​​end on its left side, and the snap-fit ​​end has a beveled snap-fit ​​connector on its left side, which snaps into the groove.

[0012] Using the above technical solution, the beveled snap-fit ​​end and the groove of the slide connecting pipe form a wedge fit, which, together with the thrust of the spring, achieves mechanical anti-loosening. This improves the anti-loosening effect compared to a simple threaded connection, and can still maintain reliable connection under the high-frequency vibration of the workover rig.

[0013] Preferably, the snap-fit ​​end has a slidably connected inclined block inside, and the right side of the inclined block is connected to a spring. The left side of the inclined block is provided with a sliding rod, and the snap-fit ​​end has a sliding groove inside, with the sliding rod slidably connected inside the sliding groove.

[0014] Using the above technical solution, the inclined block slides along the groove at the snap-fit ​​end via the slide rod, which can adapt to the installation error of the slide rail connecting pipe and improve the assembly fault tolerance rate compared with the fixed structure. At the same time, the groove restricts the inclined block to move only along the axial direction, avoiding snap-fit ​​failure.

[0015] Preferably, the inclined block and the outer side of the groove are provided with snap-fit ​​balls at the upper and lower positions, and the snap-fit ​​balls and the groove form a snap-fit ​​fixing structure.

[0016] By adopting the above technical solution, the spherical fit between the snap-fit ​​ball and the groove can achieve fine-tuning positioning within a 360° range. Combined with the axial thrust of the inclined block, the snap-fit ​​strength is improved, ensuring that the double-headed bolt body does not undergo radial displacement under off-center load conditions.

[0017] Preferably, the right side of the threaded structure on the right side of the double-ended bolt body is fixedly connected with an anti-slip block.

[0018] Using the above technical solution, the anti-slip block on the right side of the double-headed bolt body adopts a diamond pattern design, which increases the friction with the derrick connecting pipe, reduces relative rotation on the smoother end face, and prevents the bolt from rotating as a whole when the adjustment end rotates, thus ensuring the horizontal adjustment accuracy.

[0019] Compared with the prior art, the beneficial effects of this utility model are: the oil well workover rig's slide leveling device uses double-ended bolts, 1. Multi-stage anti-loosening, high connection reliability: The spring provides continuous pre-tightening force, which, together with the wedge-shaped self-locking of the inclined snap-fit ​​connector and the groove, and the spherical positioning of the snap-fit ​​ball and the round groove, forms a triple anti-loosening structure of "thread + mechanical + elastic". Under the high-frequency vibration of the workover rig, the loosening rate is reduced from 30% of the traditional structure to less than 1%, ensuring the stability of the slide after horizontal adjustment. 2. Adaptive adjustment, convenient assembly and maintenance: The sliding fit between the slide rod and the slide groove, and the spherical fine adjustment of the snap-fit ​​ball, make the device compatible with installation errors of ±1mm, improving assembly efficiency. Horizontal calibration can be achieved by rotating the adjustment end, saving operation time compared with hydraulic adjustment devices. In addition, the anti-slip block prevents slippage during adjustment, and a single person can complete the operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the double-headed bolt body structure of this utility model; Figure 2 This is a front sectional view of the double-headed bolt body of this utility model; Figure 3 This is a schematic diagram of the front structure of the trolley track of this utility model; Figure 4 This is a schematic diagram of the overall front sectional structure of this utility model; Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0021] In the diagram: 1. Double-ended bolt body; 2. Anti-slip block; 3. Spring; 4. Snap-fit ​​end; 5. Inclined block; 6. Slide rod; 7. Slide groove; 8. Inclined snap-fit ​​joint; 10. Snap-fit ​​ball; 11. Pulley track; 12. Slide track connecting pipe; 13. Derrick connecting pipe; 14. Groove; 15. Circular groove; 16. Adjustment end. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-5 This utility model provides a technical solution: A double-ended bolt for a leveling device of an oil well workover rig slideway includes a double-ended bolt body 1, a slideway connecting pipe 12, and a derrick connecting pipe 13. The slideway connecting pipe 12 is fixedly connected to the slideway 11 of the trolley, and the double-ended bolt body 1 is connected between the slideway connecting pipe 12 and the derrick connecting pipe 13. An adjusting end 16 is provided in the middle of the double-ended bolt body 1, and the left side of the double-ended bolt body 1 is threadedly connected to the inside of the slideway connecting pipe 12, and the right side of the double-ended bolt body 1 is threadedly connected to the inside of the derrick connecting pipe 13. A snap-fit ​​end 4 is provided on the left side of the double-ended bolt body 1, and a snap-fit ​​ball 10 is provided inside the snap-fit ​​end 4. The snap-fit ​​ball 10 snaps into the inside of the slideway connecting pipe 12 to form a fixed structure.

[0024] The slide connecting pipe 12 has a groove 14 on the left side inside, and the inner wall of the slide connecting pipe 12 has a circular groove 15 on both the upper and lower sides. The groove 14 and the circular groove 15 inside the slide connecting pipe 12 form a multi-level snap-fit ​​point, which provides precise positioning for the inclined snap-fit ​​joint 8 and snap-fit ​​ball 10 of the snap-fit ​​end 4. The smoother inner wall improves the connection stability and prevents the double-headed bolt body 1 from axially moving under vibration conditions.

[0025] The double-ended bolt body 1 has threaded structures on both the left and right sides. A spring 3 is fixedly connected to the left side of the threaded structure on the left side of the double-ended bolt body 1. A snap-fit ​​end 4 is provided on the left side of the spring 3, and a beveled snap-fit ​​connector 8 is provided on the left side of the snap-fit ​​end 4. The beveled snap-fit ​​connector 8 snaps into the groove 14. The spring 3 on the left side of the double-ended bolt body 1 can provide continuous preload to compensate for the preload attenuation caused by vibration of the threaded pair. At the same time, the buffering effect of the spring 3 reduces the rigid impact between the threads and extends the service life of the bolt. The beveled snap-fit ​​connector 8 of the snap-fit ​​end 4 forms a wedge fit with the groove 14 of the slide connecting pipe 12. With the thrust of the spring 3, mechanical anti-loosening is achieved, which improves the anti-loosening effect compared with simple threaded connection. It can still maintain reliable connection under the high-frequency vibration of the workover rig.

[0026] The snap-fit ​​end 4 has a slidably connected inclined block 5 inside, and the right side of the inclined block 5 is connected to the spring 3. The left side of the inclined block 5 is provided with a sliding rod 6, and the snap-fit ​​end 4 has a sliding groove 7 inside, with the sliding rod 6 slidably connected inside the sliding groove 7. Snap-fit ​​balls 10 are provided at the upper and lower positions on the outer sides of the inclined block 5 and the sliding groove 7, and the snap-fit ​​balls 10 and the circular groove 15 form a snap-fit ​​fixing structure. The inclined block 5 slides along the sliding groove 7 of the snap-fit ​​end 4 via the sliding rod 6, which can adapt to the installation error of the sliding connecting pipe 12, improving the assembly fault tolerance rate compared to the fixed structure. At the same time, the sliding groove 7 restricts the inclined block 5 to move only along the axial direction, avoiding snap-fit ​​failure. The spherical fit between the snap-fit ​​balls 10 and the circular groove 15 allows for fine-tuning positioning within a 360° range. Combined with the axial thrust of the inclined block 5, the snap-fit ​​strength is improved, ensuring that the double-ended bolt body 1 does not undergo radial displacement under off-center load conditions.

[0027] The threaded structure on the right side of the double-ended bolt body 1 is fixedly connected to an anti-slip block 2. The anti-slip block 2 on the right side of the double-ended bolt body 1 adopts a diamond pattern design to increase the friction with the derrick connecting pipe 13. The smoother end face reduces relative rotation and prevents the bolt from rotating as a whole when the adjusting end 16 rotates, thus ensuring the horizontal adjustment accuracy.

[0028] Working principle: When using this utility model, Connection and anti-loosening: Screw the left side of the double-headed bolt body 1 into the slide connecting pipe 12 and the right side into the derrick connecting pipe 13. The spring 3 pushes the inclined snap-fit ​​connector 8 of the snap-fit ​​end 4 into the groove 14. At the same time, the inclined block 5 slides along the slide groove 7, so that the snap-fit ​​ball 10 is snapped into the round groove 15, forming multiple mechanical anti-loosening measures. Horizontal adjustment: By rotating the adjustment end 16 with a wrench, the reverse threads on the left and right sides of the double-headed bolt body 1 drive the slide rail connecting pipe 12 and the derrick connecting pipe 13 to move relative to each other, thereby achieving the horizontal calibration of the trolley slide rail 11. Vibration compensation: During well workover operations, spring 3 continuously compensates for the preload, the inclined clamp 8 and clamp ball 10 prevent the bolt from moving axially and rotating radially, and the anti-slip block 2 prevents the right-side thread from loosening, ensuring that the connection is always reliable.

[0029] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-ended bolt for a leveling device of a servicing rig slideway, comprising a double-ended bolt body (1), a slideway connecting pipe (12), and a derrick connecting pipe (13), wherein the slideway connecting pipe (12) is fixedly connected to the trolley slideway (11), and the double-ended bolt body (1) is connected between the slideway connecting pipe (12) and the derrick connecting pipe (13), characterized in that: The double-headed bolt body (1) has an adjustment end (16) in the middle, and the left side of the double-headed bolt body (1) is threaded to the inside of the slide connecting pipe (12), and the right side of the double-headed bolt body (1) is threaded to the inside of the derrick connecting pipe (13). The left side of the double-headed bolt body (1) has a snap-fit ​​end (4), and the snap-fit ​​end (4) has a snap-fit ​​ball (10) inside, and the snap-fit ​​ball (10) snaps into the inside of the slide connecting pipe (12) to form a fixed structure.

2. The double-ended bolt for the leveling device of the oil well workover rig slideway according to claim 1, characterized in that: The slide connecting pipe (12) has a groove (14) on the left side inside, and the inner wall of the slide connecting pipe (12) has a circular groove (15) on both the top and bottom.

3. The double-ended bolt for the leveling device of the oil well workover rig slideway according to claim 2, characterized in that: The double-headed bolt body (1) has threaded structures on both the left and right sides, and a spring (3) is fixedly connected to the left side of the threaded structure on the left side of the double-headed bolt body (1).

4. The double-ended bolt for the leveling device of the oil well workover rig slideway according to claim 3, characterized in that: The spring (3) has a snap-fit ​​end (4) on its left side, and a beveled snap-fit ​​connector (8) is provided on the left side of the snap-fit ​​end (4), and the beveled snap-fit ​​connector (8) snaps into the groove (14).

5. The double-ended bolt for the leveling device of the oil well workover rig slideway according to claim 1, characterized in that: The snap-fit ​​end (4) is slidably connected to an inclined block (5), and the right side of the inclined block (5) is connected to a spring (3). A slide rod (6) is provided on the left side of the inclined block (5), and a slide groove (7) is provided inside the snap-fit ​​end (4), and the slide rod (6) is slidably connected inside the slide groove (7).

6. The double-ended bolt for the leveling device of the oil well workover rig slideway according to claim 5, characterized in that: The inclined block (5) and the sliding groove (7) are both provided with snap-fit ​​balls (10) at the upper and lower positions on the outside, and the snap-fit ​​balls (10) and the circular groove (15) form a snap-fit ​​fixing structure.

7. The double-ended bolt for the leveling device of the oil well workover rig slideway according to claim 1, characterized in that: The threaded structure on the right side of the double-headed bolt body (1) is fixedly connected to an anti-slip block (2).

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