An oilfield well workover tubing tripping speed-up device

Abstract

This utility model relates to the field of oilfield development technology, and in particular to an oilfield well workover tubing tripping speed-up device. It includes a base with a tubing tripping channel in the middle, and an adjusting ring groove inside the base. Three sets of drive gears are evenly distributed in a ring within the adjusting ring groove. The drive gears are rotatably connected to the base. An adjusting rack is rotatably connected to one side of the drive gear, and the adjusting rack is located in the upper half of the drive gear. The drive gear is rotated by an adjusting mechanism, which moves the adjusting rack to a different position. A limit plate is provided at the front end of the adjusting rack, limiting the tripping path according to the tubing specifications. This utility model, through integrated adjustment, flexibly adjusts the wellhead limiting channel according to the actual tubing specifications, ensuring stable tubing tripping trajectory, preventing damage to the tubing outer wall from impacts, and offering simple and convenient operation with short adjustment time, thus effectively enhancing the device's practical value.

Description

Technical Field

[0001] This utility model relates to the field of oilfield development technology, and in particular to an oilfield well workover and tubing tripping speed-up device. Background Technology

[0002] In oilfield well workover operations, repeatedly pulling in and out tubing (i.e., repeatedly pulling in and out of the tubing from the wellbore) is a common operation. Most current tubing pulling devices have relatively simple structures and lack tubing pulling path limiting structures, making it difficult to adapt to the operational needs of different tubing specifications. This leads to unstable tubing movement trajectories and affects operational efficiency. Devices with limiting structures are mostly split-type limiting structures. When adjusting the limiting structure according to the tubing specifications, it is often necessary to adjust each independent structure in turn, which takes a certain amount of time. Moreover, they may only be able to limit the adjustment for a few specific tubing specifications, which has a limited scope of application and is inconvenient in actual use.

[0003] Therefore, given the inconvenience of adjusting the limiting channel in existing tubing tripping speed-up devices, an oilfield well workover tubing tripping speed-up device can be designed. Through integrated adjustment, the wellhead limiting channel can be flexibly adjusted according to the actual tubing specifications, ensuring the stability of the tubing tripping trajectory and avoiding damage to the outer wall of the tubing, thereby effectively enhancing the practical value of the device. Utility Model Content

[0004] In order to overcome the problem that most tubing raising and lowering devices are difficult to adapt to the operational needs of tubing of different specifications, and that most devices with limiting structures are split limiting structures, which often require adjusting each independent structure in turn, which takes a certain amount of time and is inconvenient in actual use, this utility model is proposed.

[0005] The technical solution of this utility model is as follows: an oilfield well workover tubing tripping speed-up device, including a base with a tubing tripping groove in the middle, and an adjustment ring groove opened on the inner side of the base. Three sets of drive gears are distributed in a ring at equal intervals in the adjustment ring groove. The drive gears are rotatably connected to the base. An adjustment rack is meshed and rotatably connected to one side of the drive gear. The adjustment rack is set in the upper half of the drive gear. The drive gear is rotated by an adjustment mechanism. Rotating the drive gear moves the position of the adjustment rack. A limit plate is set at the front end of the adjustment rack. The limit plate limits the tripping path of the tubing according to the tubing specifications.

[0006] Preferably, the drive gear in the adjusting ring groove is controlled by an adjusting mechanism. The rotating drive gear drives the adjusting rack to mesh and move. The adjusting rack moves on the base according to the actual specifications of the tubing, thereby flexibly adjusting the spacing between each set of limiting plates. This allows the tubing to be raised and lowered within the limiting channel formed by the limiting plates, thus achieving flexible adjustment of the wellhead limiting channel according to the actual tubing specifications. This ensures the stability of the tubing's raising and lowering trajectory, avoids damage to the outer wall of the tubing from impacts, and enhances the practical value of the device.

[0007] Preferably, the top of the limiting plate is set as a guide plate tilted outward at 45°, and multiple sets of rollers are rotatably connected to the outside of the limiting plate, with the rollers abutting against the outer wall of the oil pipe.

[0008] Preferably, the adjustment mechanism includes a servo motor. The servo motor is located at the top of the base, and its output end is connected to the drive shaft of one of the drive gears, thereby driving one of the drive gears to rotate.

[0009] Preferably, the adjustment mechanism includes a servo motor. The servo motor is located at the top of the base, and its output end is connected to the drive shaft of one of the drive gears, thereby driving one of the drive gears to rotate.

[0010] Preferably, the adjustment mechanism also includes a guide plate and an L-shaped slide groove. The guide plate is provided on the outer side of the bottom of the adjustment rack, and three sets of L-shaped slide grooves are provided at equal intervals in a ring at the top of the base. The adjustment rack and the guide plate slide along the L-shaped slide grooves.

[0011] Preferably, the rear end of the limiting plate is provided with a sliding telescopic rod, the outer telescopic end of the sliding telescopic rod is hinged to the bottom of the rear end of the limiting plate, the outer fixed end of the sliding telescopic rod is hinged to the inner wall of the base, and the outer fixed end of the sliding telescopic rod is located below the adjusting rack.

[0012] The beneficial effects of this utility model are:

[0013] When raising or lowering the tubing, the drive gear in the adjusting ring groove is rotated. The rotation of the drive gear drives the adjusting rack to mesh and move. The adjusting rack moves on the base according to the actual specifications of the tubing, thereby flexibly adjusting the spacing between each set of limit plates. This allows the tubing to be raised or lowered within the limiting channel formed by the limit plates. This solves the problem that most tubing raising and lowering devices are difficult to adapt to the operational needs of tubing of different specifications. Moreover, most devices with limit structures are split limit structures, which often require adjusting each independent structure in turn, which takes a certain amount of time and is inconvenient in actual use. This device enhances its practical value. Attached Figure Description

[0014] Figure 1 The diagram shown is a three-dimensional structural schematic of an oilfield well workover tubing tripping acceleration device according to this utility model.

[0015] Figure 2 The diagram shown is a three-dimensional structural illustration of the internal structure of an oilfield well workover tubing tripping acceleration device according to this utility model.

[0016] Figure 3 The diagram shown is a first three-dimensional structural schematic of the adjustment mechanism of an oilfield well workover tubing tripping speed-up device according to this utility model.

[0017] Figure 4 The diagram shown is a two-dimensional structural schematic of the adjustment mechanism of an oilfield well workover tubing tripping speed-up device according to this utility model.

[0018] Figure 5 The diagram shows a three-dimensional structural schematic of the limiting plate of an oilfield well workover tubing tripping speed-up device according to this utility model.

[0019] Figure 6 The diagram shown is a cross-sectional three-dimensional structural schematic of an oilfield well workover tubing tripping and running-out speed-up device according to this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Base; 2. Adjusting ring groove; 3. Drive gear; 301. Servo motor; 302. Ring rack; 303. Limiting ring; 304. Guide plate; 305. L-shaped slide groove; 4. Adjusting rack; 5. Limiting plate; 501. Ball bearing; 502. Sliding telescopic rod. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figure 1 and Figure 2 This utility model provides an embodiment of an oilfield well workover tubing tripping speed-up device, including a base 1 with a tubing tripping groove in the middle, and an adjustment ring groove 2 on the inner side of the base 1. Three sets of drive gears 3 are distributed in a ring at equal intervals in the adjustment ring groove 2. The drive gears 3 are rotatably connected to the base 1. An adjustment rack 4 is rotatably connected to one side of the drive gear 3. The adjustment rack 4 is set in the upper half of the drive gear 3. The drive gear 3 is rotated by an adjustment mechanism. Rotating the drive gear 3 moves the position of the adjustment rack 4. A limit plate 5 is set at the front end of the adjustment rack 4. The limit plate 5 limits the tripping path of the tubing according to the tubing specifications.

[0023] Please see Figure 5In this embodiment, the top of the limiting plate 5 is set as an inclined plate tilted outward at 45°. Multiple sets of rolling balls 501 are rotatably connected to the outer side of the limiting plate 5. The rolling balls 501 abut against the outer wall of the oil pipe. The oil pipe moves up and down between the limiting plates 5. By using the rolling balls 501 to abut against the outer wall of the oil pipe, the rolling balls 501 are driven to roll when the oil pipe moves up and down. This can reduce the direct contact area between the oil pipe and the limiting plate 5, avoid wear on the outer wall of the oil pipe, and at the same time, improve the lubrication of the oil pipe when it moves up and down.

[0024] Please see Figure 1 , Figure 3 and Figure 4 In this embodiment, the adjustment mechanism includes a servo motor 301, a ring rack 302, a limiting ring 303, a guide plate 304, and an L-shaped slide groove 305. The servo motor 301 is located at the top of the base 1. The output end of the servo motor 301 is connected to the drive shaft of one set of drive gears 3, driving one set of drive gears 3 to rotate. The ring rack 302 is rotatably connected to the inner side of the adjustment ring groove 2. The inner rack of the ring rack 302 meshes with the lower half of the drive gear 3. The ring rack 302 is located below the adjustment rack 4. A limiting ring 303 is located on the outer side of the ring rack 302, engaging and rotating with the base 1. A guide plate 304 is located on the outer bottom of the adjustment rack 4. Three sets of ring-shaped slide grooves are equidistantly spaced at the top of the base 1. The L-shaped slide 305, along which the adjusting rack 4 and guide plate 304 slide, allows the servo motor 301 to operate according to the specifications of the oil pipe being lifted, controlled by external equipment. The servo motor 301 drives one set of drive gears 3 to rotate, which in turn drives the ring rack 302 to mesh and rotate. As the ring rack 302 rotates, the limiting ring 303 rotates synchronously within the base 1. The rotation of the ring rack 302 drives the other two sets of drive gears 3 to mesh and rotate synchronously. The synchronous rotation of the three sets of drive gears 3 causes the adjusting rack 4 to move synchronously. At this time, the guide plate 304 moves synchronously along the L-shaped slide 305, limiting the movement path of the adjusting rack 4 and ensuring stable displacement of the adjusting rack 4. This achieves the effect of flexibly adjusting the spacing of the limiting plates 5 according to the specifications of the oil pipe.

[0025] Please see Figure 6 In this embodiment, a sliding telescopic rod 502 is provided at the rear end of the limiting plate 5. The outer telescopic end of the sliding telescopic rod 502 is hinged to the bottom of the rear end of the limiting plate 5, and the outer fixed end of the sliding telescopic rod 502 is hinged to the inner wall of the base 1. The outer fixed end of the sliding telescopic rod 502 is located below the adjusting rack 4. When the spacing of the limiting plate 5 is adjusted, the sliding telescopic rod 502 is driven to extend and retract, and the sliding telescopic rod 502 is used to ensure the stability of the position of the limiting plate 5.

[0026] When adjusting the inner diameter of the limiting passage, the external equipment control servo motor 301 is raised according to the actual specifications of the oil pipe. The servo motor 301 drives one set of drive gears 3 in the adjusting ring groove 2 to rotate. The rotation of one set of drive gears 3 drives the ring rack 302 to mesh and rotate, and at the same time drives the limiting ring 303 to rotate synchronously in the base 1. The rotation of the ring rack 302 drives the other two sets of drive gears 3 to mesh and rotate synchronously. The synchronous rotation of the three sets of drive gears 3 drives the adjusting rack 4 to move synchronously. At this time, the guide plate 304 moves along the L-shaped slide groove 305, thereby reducing the distance between the limiting plates 5. At the same time, the sliding telescopic rod 502 extends synchronously to ensure that the limiting plates 5 are placed stably.

[0027] When raising or lowering the oil pipe, the oil pipe is placed into the limiting passage formed by multiple sets of limiting plates 5, so that the outer wall of the oil pipe abuts against the ball 501. When raising or lowering the oil pipe, the ball 501 is rotated to ensure that the oil pipe is raised or lowered quickly.

[0028] Through the above steps, the drive gear 3 in the adjusting ring groove 2 is controlled to rotate by the adjusting mechanism. The rotation of the drive gear 3 drives the adjusting rack 4 to mesh and move. The adjusting rack 4 moves on the base 1 according to the actual specifications of the tubing, thereby flexibly adjusting the spacing of each set of limit plates 5. This allows the tubing to be raised and lowered within the limiting channel formed by the limit plates 5. Thus, the wellhead limiting channel is flexibly adjusted according to the actual specifications of the tubing to be raised and lowered, ensuring the stability of the tubing's raising and lowering trajectory and avoiding damage to the outer wall of the tubing from impacts.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An oilfield well workover tubing tripping speed-up device, comprising a base (1) with a tubing tripping groove in the middle, characterized in that: It also includes an adjustment ring groove (2) opened inside the base (1). Three sets of drive gears (3) are distributed in a ring at equal intervals in the adjustment ring groove (2). The drive gears (3) are rotatably connected to the base (1). An adjustment rack (4) is meshed and rotatably connected to one side of the drive gears (3). The adjustment rack (4) is set in the upper half of the drive gears (3). The drive gears (3) are rotated by the adjustment mechanism. Rotating the drive gears (3) moves the position of the adjustment rack (4). A limit plate (5) is set at the front end of the adjustment rack (4). The limit plate (5) limits the lifting and lowering path of the oil pipe according to the specifications of the oil pipe.

2. The oilfield well workover tubing tripping speed-up device according to claim 1, characterized in that: The top of the limiting plate (5) is set as an inclined plate tilted outward at 45°. Multiple sets of rollers (501) are rotatably connected to the outside of the limiting plate (5), and the rollers (501) abut against the outer wall of the oil pipe.

3. The oilfield well workover tubing tripping speed-up device according to claim 1, characterized in that: The adjustment mechanism includes a servo motor (301). The servo motor (301) is installed at the top of the base (1). The output end of the servo motor (301) is connected to the drive shaft of one of the drive gears (3). The servo motor (301) drives one of the drive gears (3) to rotate.

4. The oilfield well workover tubing tripping speed-up device according to claim 3, characterized in that: The adjustment mechanism also includes an annular rack (302) and a limiting ring (303). The annular rack (302) is rotatably connected to the inner side of the adjustment ring groove (2). The inner rack of the annular rack (302) meshes with the lower half of the drive gear (3) and is rotatably connected. The annular rack (302) is located below the adjustment rack (4). The limiting ring (303) is provided on the outer side of the annular rack (302). The limiting ring (303) is rotatably connected to the base (1).

5. The oilfield well workover tubing tripping speed-up device according to claim 4, characterized in that: The adjustment mechanism also includes a guide plate (304) and an L-shaped slide (305). The bottom outer side of the adjustment rack (4) is provided with a guide plate (304), and the top of the base (1) is provided with three sets of L-shaped slides (305) in a ring shape at equal intervals. The adjustment rack (4) and the guide plate (304) slide along the L-shaped slide (305).

6. The oilfield well workover tubing tripping speed-up device according to claim 1, characterized in that: The rear end of the limiting plate (5) is provided with a sliding telescopic rod (502). The outer telescopic end of the sliding telescopic rod (502) is hinged to the bottom of the rear end of the limiting plate (5). The outer fixed end of the sliding telescopic rod (502) is hinged to the inner wall of the base (1). The outer fixed end of the sliding telescopic rod (502) is located below the adjusting rack (4).

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