Sucker rod centralizer

Abstract

The invention relates to the technical field of sucker rods, and discloses a sucker rod centralizer which comprises a centralizing sleeve, a short section, compensation sleeves and an elastic sleeve, connecting rods are integrally formed at the tops and the bottoms of the two compensation sleeves correspondingly, and racks are integrally formed at one ends of the connecting rods; when two groups of semicircular compensation sleeves are close to each other and mounted between first limiting rings at two ends of a centralizing sleeve, connecting rods and racks at two ends of the compensation sleeves are close to a turntable at the top of a supporting plate, and after the two groups of compensation sleeves are fixed by extruding a pressure spring, the two groups of racks in the same plane can be in meshing transmission with a first gear ring; a first clamping plate at the top of the rotary table can expand or contract along an arc-shaped positioning groove under the cooperation of a positioning rod and a guide groove, so that sucker rods with different diameters penetrating through a centralizing sleeve can be clamped and positioned, and synchronous work of a compensation sleeve and a clamping mechanism at the top of a supporting plate is achieved; and the centralizer can be conveniently and quickly disassembled and assembled.

Description

Technical Field

[0001] The invention relates to the technical field of sucker rods, in particular to a sucker rod centralizer. Background Art

[0002] The sucker rod moves up and down in the oil pipe. Due to the elastic deformation of the sucker rod, the rod and the oil pipe wall are prone to friction, and the sucker rod is easy to break. The sucker rod centralizer is a downhole tool to prevent eccentric wear in pumping wells. It is suitable for pumping wells with eccentric wear, especially for pumping wells and directional inclined wells with eccentric wear above the neutral point of the sucker rod. Below the neutral point of the sucker rod, it cooperates with the nylon centralizer on the sucker rod body to achieve a better anti-eccentric wear effect.

[0003] For example, the Chinese patent authorization announcement number is CN217841560U, "discloses a sucker rod centralizer, which relates to the field of petroleum machinery technology. The utility model includes a centralizing sleeve and short sections arranged at both ends of the centralizing sleeve, the short sections are hollow inside, an adjustment mechanism is arranged between the two short sections and the centralizing sleeve, and a compensation mechanism is arranged on the centralizing sleeve. The adjustment mechanism includes a ring body, a sleeve ring, a support plate, a slider and a clamping member, the ring body is arranged between the centralizing sleeve and the short section, the compensation mechanism includes an elastic member, a mounting plate and a compensation sleeve, and a plurality of receiving grooves are opened on the outer surface of the centralizing sleeve"; The adjustment mechanism and compensation mechanism set in the above-mentioned comparative document can adapt to different sucker rod sizes, improve the versatility of the stabilizer, achieve better use effect, avoid damage to the equipment, adapt to oil pipes of different sizes, have good practicality, and facilitate replacement of the compensation sleeve.

[0004] However, when the above sucker rod centralizer is assembled and used, the external compensation sleeve of the centralizer sleeve and the sucker rod clamping structure on the support plate need to be disassembled and assembled separately, which makes it very inconvenient to operate the centralizer when disassembling and assembling. In addition, the sucker rod is clamped and positioned by a group of clamping mechanisms on the support plate, and the stability between the sucker rod and the elastic sleeve is low. Summary of the invention

[0005] The object of the present invention is to provide a sucker rod centralizer, which can realize synchronous operation of the compensation sleeve and the clamping mechanism at the top of the support plate, facilitates the rapid disassembly and assembly of the centralizer, thereby facilitating the rapid and convenient assembly and positioning of the sucker rod and improving the stability between the sucker rod and the elastic sleeve.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sucker rod centralizer, comprising a centralizer sleeve, a short section, a compensation sleeve, and an elastic sleeve, wherein the top and bottom of the two groups of compensation sleeves are respectively integrally formed with a connecting rod, and one end of the connecting rod is integrally formed with a rack, the top of the centralizer sleeve is fixedly installed with a support plate, and a turntable is rotatably installed on the top of the support plate, and the first clamping plate is fixedly connected to the top of the turntable, the elastic sleeve is arranged in the inner cavity of the short section, the top of the elastic sleeve is rotatably installed with a ring sleeve, the outside of the ring sleeve is fixedly provided with a second gear ring, and a synchronous gear is rotatably installed on the outer circumference of the elastic sleeve through a rotating shaft at equal intervals, a second bevel gear is fixedly sleeved on the rotating shaft at the bottom of the synchronous gear, a screw is rotatably installed on the inner wall of the elastic sleeve at equal intervals, the first bevel gear is fixedly sleeved on the end of the screw, and a second clamping plate is threadedly installed on the outside of the screw.

[0007] Preferably, first limiting rings are integrally formed at both ends of the straightening sleeve, and clearance grooves are respectively provided at the edges of both sides of the first limiting ring, and the clearance grooves extend to the edge of the support plate.

[0008] Preferably, a second limiting ring is threadedly mounted on the top of the short section, a third limiting ring is integrally formed in the inner wall of the short section, and positioning plugs are fixedly mounted on both sides of the top of the inner wall of the second limiting ring.

[0009] Preferably, compression springs are fixedly installed at equal intervals on the circumference of the inner wall of the straightening sleeve, ear plates are integrally formed on both sides of the two groups of compensation sleeves, and locking nuts are fixedly installed between the two adjacent groups of ear plates.

[0010] Preferably, the connecting rod is movably inserted into the corresponding inner wall of the give way groove, and the outer edges of the two groups of racks located in the same plane are meshed with the outer edge of the first gear ring.

[0011] Preferably, a guide groove matching the positioning rod is provided on the top of the first limiting ring, positioning grooves are provided at equal intervals on the top circumference of the turntable, and multiple groups of positioning rods movably penetrate the corresponding positioning grooves and extend into the bottom guide groove.

[0012] Preferably, the short section is installed at the top edge of the turntable by means of threads, the first clamping plate extends into the inner cavity of the short section, and a fixing bolt is fixedly installed between the support plate and the first limiting ring.

[0013] Preferably, the elastic sleeve is located at the top of the third limiting ring, and the positioning plugs on both sides of the bottom of the second limiting ring are movably inserted into the top plug holes of the ring sleeve respectively.

[0014] Preferably, the elastic sleeve is provided with sliding grooves at equal intervals on the circumference of the ring sleeve, one end of the second clamping plate slides in the sliding groove, and the screw is rotatably installed in the sliding groove.

[0015] Preferably, the elastic sleeve is fixed with a fixed seat at equal intervals near the circumference of the ring sleeve, and the synchronous gear is rotatably installed on the fixed seat through a rotating shaft. The outer edges of multiple groups of synchronous gears are meshed with the outer edges of the second gear ring, and the outer edges of the second bevel gears are meshed with the corresponding outer edges of the first bevel gears.

[0016] Compared with the prior art, the present invention has the following beneficial effects: When the two groups of semicircular compensation sleeves in the present invention are installed close to each other and between the first limit rings at both ends of the straightening sleeves, the connecting rods and the racks at both ends of the compensation sleeves and the turntable on the top of the support plate are close to each other. After the two groups of compensation sleeves are fixed by squeezing the compression springs, the two groups of racks in the same plane can mesh and transmit the first gear ring, thereby making the turntable rotate. In this way, the first clamping plate on the top of the turntable can expand or contract along the arc-shaped positioning groove under the cooperation of the positioning rod and the guide groove, so that the sucker rods with different diameters passing through the straightening sleeve can be clamped and positioned, thereby realizing the synchronous operation of the compensation sleeve and the clamping mechanism on the top of the support plate, and facilitating the rapid disassembly and assembly of the straightening device.

[0017] In the present invention, after the elastic sleeve is positioned by the third limiting ring in the short section, when the second limiting ring is installed by threading, the positioning plug block can be inserted into the top socket of the sleeve and rotate synchronously, so that the second gear ring can be driven synchronously, and the second gear ring drives multiple sets of synchronous gears synchronously, and the second bevel gear at the bottom of the synchronous gear meshes with the corresponding first bevel gear. In this way, the screw drives the second clamping plate, so that multiple sets of circumferentially arranged second clamping plates can further clamp and position the sucker rod inside the elastic sleeve, and the second clamping plate and the first clamping plate can clamp both sides of the sucker rod in the stabilizer, thereby improving the clamping stability of the sucker rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 Schematic diagram of the structure of the second limiting ring in the present invention; Figure 3 It is a schematic diagram of the split structure of two groups of compensation sleeves in the present invention; Figure 4 It is a schematic diagram of the side cross-sectional structure of the elastic sleeve in the present invention; Figure 5 for Figure 2 A schematic diagram of the partially enlarged structure at center A; Figure 6 for Figure 2 A schematic diagram of the partially enlarged structure at B in the middle; Figure 7 for Figure 4 Schematic diagram of the partial enlarged structure at point C in the middle.

[0019] In the figure: 1. straightening sleeve; 2. short section; 3. compensation sleeve; 4. connecting rod; 5. support plate; 6. elastic sleeve; 7. second clamping plate; 11. first limiting ring; 12. clearance groove; 21. second limiting ring; 22. third limiting ring; 23. positioning plug; 31. compression spring; 32. ear plate; 33. locking nut; 41. rack; 51. turntable; 52. fixing bolt; 53. first gear ring; 54. positioning groove; 55. positioning rod; 56. first clamping plate; 61. ring sleeve; 71. screw; 72. first bevel gear; 610. second gear ring; 611. fixing seat; 612. synchronous gear; 613. second bevel gear. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Embodiment 1: This embodiment introduces a sucker rod centralizer, such as Figure 1-Figure 7 As shown, a sucker rod centralizer comprises a centralizing sleeve 1, a short section 2, a compensation sleeve 3, and an elastic sleeve 6. The top and bottom of the two groups of compensation sleeves 3 are respectively integrally formed with connecting rods 4, and one end of the connecting rod 4 is integrally formed with a rack 41. A support plate 5 is fixedly installed on the top of the centralizing sleeve 1, and a turntable 51 is rotatably installed on the top of the support plate 5. A first gear ring 53 is fixedly sleeved on the outer side of the turntable 51. Positioning rods 55 are movably penetrated at equal intervals on the circumference of the top of the turntable 51. The top of the positioning rod 55 is fixedly connected with a first clamping plate 56. The sucker rod passes through the inner cavity of the centralizing sleeve 1, extends to the short section 2, and is plugged in through the elastic sleeve 6 inside the short section 2. In this embodiment, when the two groups of semicircular compensation sleeves 3 are installed close to each other between the first limiting rings 11 at both ends of the straightening sleeve 1, the connecting rods 4 and the racks 41 at both ends of the compensation sleeves 3 and the rotating disk 51 at the top of the support plate 5 are close to each other. After the two groups of compensation sleeves 3 are fixed by squeezing the compression springs 31, the two groups of racks 41 in the same plane can mesh and transmit the first gear ring 53, so that the rotating disk 51 rotates, so that the first clamping plate 56 at the top of the rotating disk 51 can expand or contract along the arc-shaped positioning groove 54 under the cooperation of the positioning rod 55 and the guide groove, so that the sucker rods with different diameters passing through the straightening sleeve 1 can be clamped and positioned, so that the compensation sleeve 3 and the clamping mechanism at the top of the support plate 5 work synchronously, which is convenient for the rapid disassembly and assembly of the straightening device; Among them, the first limiting rings 11 are integrally formed at both ends of the straightening sleeve 1, and the edges of the two sides of the first limiting ring 11 are respectively provided with clearance grooves 12, which extend to the edge of the support plate 5. When the two groups of semicircular compensation sleeves 3 are installed close to each other between the first limiting rings 11 at both ends of the straightening sleeve 1, the connecting rod 4 in the same plane can pass through the clearance grooves 12 and approach the turntable 51 on the top of the support plate 5.

[0022] Among them, a second limiting ring 21 is installed on the top of the short section 2 through a thread, a third limiting ring 22 is integrally formed in the inner wall of the short section 2, and positioning blocks 23 are fixedly installed on both sides of the top of the inner wall of the second limiting ring 21. After the elastic sleeve 6 is positioned by the third limiting ring 22 in the short section 2, when the second limiting ring 21 is installed through a thread, the positioning block 23 can be inserted into the top hole of the ring sleeve 61 and rotate synchronously, so that the second gear ring 610 can be driven synchronously.

[0023] Among them, compression springs 31 are fixedly installed at equal intervals on the circumference of the inner wall of the straightening sleeve 1, ear plates 32 are integrally formed on both sides of the two groups of compensation sleeves 3, and locking nuts 33 are fixedly installed between the two adjacent groups of ear plates 32. When the two groups of semicircular compensation sleeves 3 are installed close to each other between the first limiting rings 11 at both ends of the straightening sleeve 1, the ear plates 32 between the two groups of compensation sleeves 3 can be fixed by the locking nuts 33.

[0024] Among them, the connecting rod 4 is movably inserted in the inner wall of the corresponding give way groove 12, and the outer edges of the two groups of racks 41 located in the same plane are meshed with the outer edges of the first gear ring 53. A guide groove matching the positioning rod 55 is provided on the top of the first limit ring 11. Positioning grooves 54 are evenly spaced through the top circumference of the turntable 51. Multiple groups of positioning rods 55 movably penetrate the corresponding positioning grooves 54 and extend to the bottom guide groove. The connecting rods 4 and racks 41 at both ends of the compensation sleeve 3 and the turntable 51 on the top of the support plate 5 are close to each other. After the two groups of compensation sleeves 3 are squeezed and fixed by the compression springs 31, the two groups of racks 41 in the same plane can mesh and transmit the first gear ring 53, thereby making the turntable 51 rotate, so that the first clamping plate 56 on the top of the turntable 51 can expand or contract along the arc-shaped positioning groove 54 under the cooperation of the positioning rod 55 and the guide groove.

[0025] Embodiment 2: Based on Embodiment 1, this embodiment introduces a sucker rod centralizer, such as Figure 2 , Figure 4 , Figure 7As shown, the elastic sleeve 6 is arranged in the inner cavity of the short section 2, a ring sleeve 61 is rotatably installed on the top of the elastic sleeve 6, a second gear ring 610 is fixedly sleeved on the outside of the ring sleeve 61, a synchronous gear 612 is rotatably installed on the outer circumference of the elastic sleeve 6 through a rotating shaft at equal intervals, a second bevel gear 613 is fixedly sleeved on the rotating shaft at the bottom of the synchronous gear 612, a screw rod 71 is rotatably installed on the inner wall of the elastic sleeve 6 at equal intervals, a first bevel gear 72 is fixedly sleeved on the end of the screw 71, and a second clamping plate 7 is installed on the outside of the screw 71 through a thread; In this embodiment, after the elastic sleeve 6 is positioned by the third limiting ring 22 in the short section 2, when the second limiting ring 21 is installed by threading, the positioning plug 23 can be inserted into the top socket of the ring sleeve 61 and rotate synchronously, so that the second gear ring 610 can be driven synchronously, and the second gear ring 610 drives multiple sets of synchronous gears 612 synchronously. The second bevel gear 613 at the bottom of the synchronous gear 612 meshes and transmits the corresponding first bevel gear 72, so that the screw 71 drives the second clamping plate 7, so that multiple sets of circumferentially arranged second clamping plates 7 can further clamp and position the sucker rod inside the elastic sleeve 6, and the second clamping plate 7 and the first clamping plate 56 can clamp both sides of the sucker rod in the stabilizer, thereby improving the clamping stability of the sucker rod.

[0026] Among them, the short section 2 is installed at the top edge of the turntable 51 through threads, the first clamping plate 56 extends into the inner cavity of the short section 2, a fixing bolt 52 is fixedly installed between the support plate 5 and the first limiting ring 11, the elastic sleeve 6 is located at the top of the third limiting ring 22, and the positioning blocks 23 on both sides of the bottom of the second limiting ring 21 are respectively movably inserted in the top sockets of the ring sleeve 61. After the elastic sleeve 6 is positioned by the third limiting ring 22 in the short section 2, when the second limiting ring 21 is installed by threads, the positioning block 23 can be inserted into the top socket of the ring sleeve 61 and rotate synchronously, so that the second gear ring 610 can be driven synchronously.

[0027] Among them, the elastic sleeve 6 is provided with sliding grooves at equal intervals on the circumference of the ring sleeve 61, one end of the second clamping plate 7 slides in the sliding groove, and the screw 71 is rotatably installed in the sliding groove. The elastic sleeve 6 is fixed with a fixed seat 611 at equal intervals on the circumference of the ring sleeve 61, and the synchronous gear 612 is rotatably installed on the fixed seat 611 through the rotating shaft. The outer edges of multiple groups of synchronous gears 612 are meshed with the outer edges of the second gear ring 610, and the outer edges of the second bevel gears 613 are meshed with the outer edges of the corresponding first bevel gears 72. The second gear ring 610 drives the multiple groups of synchronous gears 612 synchronously, and the second bevel gear 613 at the bottom of the synchronous gear 612 meshes and transmits the corresponding first bevel gear 72. In this way, the screw 71 drives the second clamping plate 7, so that the multiple groups of circumferentially arranged second clamping plates 7 can further clamp and position the sucker rod inside the elastic sleeve 6.

[0028] Working principle: When in use, firstly, the short section 2, the second limiting ring 21 at the top and the straightening sleeve 1 are respectively mounted on the outside of the sucker rod; Then, when the two groups of semicircular compensation sleeves 3 are installed close to each other between the first limiting rings 11 at both ends of the straightening sleeve 1, the connecting rods 4 and the racks 41 at both ends of the compensation sleeves 3 are close to each other with the turntable 51 at the top of the support plate 5, and the ear plates 32 between the two groups of compensation sleeves 3 are fixed by the locking nuts 33. After the two groups of compensation sleeves 3 are fixed by squeezing the compression springs 31, the two groups of racks 41 in the same plane can mesh and transmit the first gear ring 53, so that the turntable 51 rotates, so that the first clamping plate 56 on the top of the turntable 51 can expand or contract along the arc-shaped positioning groove 54 under the cooperation of the positioning rod 55 and the guide groove, so that the sucker rods with different diameters passing through the straightening sleeve 1 can be clamped and positioned; Finally, after the elastic sleeve 6 is positioned by the third limiting ring 22 in the short section 2, when the second limiting ring 21 is installed by threading, the positioning plug 23 can be inserted into the top socket of the ring sleeve 61 and rotate synchronously, so that the second gear ring 610 can be driven synchronously, and the second gear ring 610 drives multiple sets of synchronous gears 612 synchronously. The second bevel gear 613 at the bottom of the synchronous gear 612 meshes and transmits the corresponding first bevel gear 72, so that the screw 71 drives the second clamping plate 7, so that multiple sets of circumferentially arranged second clamping plates 7 can further clamp and position the sucker rod inside the elastic sleeve 6, and the second clamping plate 7 and the first clamping plate 56 can clamp both sides of the sucker rod in the stabilizer, thereby improving the clamping stability of the sucker rod.

[0029] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes and modifications may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sucker rod centralizer, comprising a centralizing sleeve (1), a short joint (2), a compensating sleeve (3), and an elastic sleeve (6), characterized in that: The top and bottom of the two groups of compensation sleeves (3) are respectively integrally formed with connecting rods (4), one end of the connecting rod (4) is integrally formed with a rack (41), a support plate (5) is fixedly installed on the top of the straightening sleeve (1), a turntable (51) is rotatably installed on the top of the support plate (5), a first toothed ring (53) is provided on the outer fixed sleeve of the turntable (51), positioning rods (55) are movably penetrated at equal intervals on the circumference of the top of the turntable (51), and a first clamping plate (56) is fixedly connected to the top of the positioning rod (55), and the elastic sleeve (6) is arranged in the inner cavity of the short section (2). In the embodiment, a ring sleeve (61) is rotatably mounted on the top of the elastic sleeve (6), a second gear ring (610) is fixedly mounted on the outside of the ring sleeve (61), a synchronous gear (612) is rotatably mounted on the outer circumference of the elastic sleeve (6) via a rotating shaft at equal intervals, a second bevel gear (613) is fixedly mounted on the rotating shaft at the bottom of the synchronous gear (612), a screw rod (71) is rotatably mounted on the inner wall of the elastic sleeve (6) at equal intervals, a first bevel gear (72) is fixedly mounted on the end of the screw rod (71), and a second clamping plate (7) is mounted on the outside of the screw rod (71) via a thread.

2. The sucker rod centralizer according to claim 1, characterized in that: First limiting rings (11) are integrally formed at both ends of the straightening sleeve (1), and clearance grooves (12) are respectively provided at the edges of both sides of the first limiting ring (11), and the clearance grooves (12) extend to the edge of the support plate (5).

3. A sucker rod centralizer according to claim 2, characterized in that: A second limiting ring (21) is threadedly mounted on the top of the short section (2), a third limiting ring (22) is integrally formed in the inner wall of the short section (2), and positioning plugs (23) are respectively fixedly mounted on both sides of the top of the inner wall of the second limiting ring (21).

4. A sucker rod centralizer according to claim 3, characterized in that: Compression springs (31) are fixedly installed at equal intervals on the circumference of the inner wall of the straightening sleeve (1), ear plates (32) are integrally formed on both sides of the two groups of compensation sleeves (3), and locking nuts (33) are fixedly installed between two adjacent groups of ear plates (32).

5. A sucker rod centralizer according to claim 4, characterized in that: The connecting rod (4) is movably inserted into the inner wall of the corresponding clearance groove (12), and the outer edges of the two groups of racks (41) located in the same plane are meshed with the outer edge of the first gear ring (53).

6. A sucker rod centralizer according to claim 5, characterized in that: A guide groove matching the positioning rod (55) is provided on the top of the first limiting ring (11), positioning grooves (54) are provided at equal intervals on the circumference of the top of the rotating disk (51), and a plurality of groups of positioning rods (55) movably penetrate the corresponding positioning grooves (54) and extend into the bottom guide groove.

7. A sucker rod centralizer according to claim 6, characterized in that: The short section (2) is threadedly mounted on the top edge of the rotating disk (51); the first clamping plate (56) extends into the inner cavity of the short section (2); and a fixing bolt (52) is fixedly mounted between the support plate (5) and the first limiting ring (11).

8. The sucker rod centralizer according to claim 7, characterized in that: The elastic sleeve (6) is located at the top of the third limiting ring (22), and the positioning plugs (23) on both sides of the bottom of the second limiting ring (21) are movably plugged into the top plug holes of the ring sleeve (61).

9. A sucker rod centralizer according to claim 8, characterized in that: The elastic sleeve (6) is provided with sliding grooves at equal intervals on the circumference of the ring sleeve (61), one end of the second clamping plate (7) slides in the sliding groove, and the screw rod (71) is rotatably installed in the sliding groove.

10. The sucker rod centralizer according to claim 9, characterized in that: A fixing seat (611) is fixedly mounted at equal intervals on the circumference of the elastic sleeve (6) close to the ring sleeve (61); the synchronous gear (612) is rotatably mounted on the fixing seat (611) via a rotating shaft; the outer edges of multiple groups of the synchronous gears (612) are meshed with the outer edges of the second gear ring (610); and the outer edges of the second bevel gears (613) are meshed with the outer edges of the corresponding first bevel gears (72).

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