Sucker rod centralizer

Abstract

The utility model discloses a sucker rod centralizer which comprises an inner shell, wear-resisting sleeves and a pressing mechanism, the two wear-resisting sleeves are detachably installed on the outer side of the inner shell, two clamping strips are fixed to the inner sides of the wear-resisting sleeves, clamping grooves used for clamping the clamping strips are formed in the inner shell, and the two wear-resisting sleeves are fixed to the outer side of the inner shell through the pressing mechanism. The pressing mechanism comprises a first semicircular ring, a second semicircular ring, a pin shaft, a fastening bolt and a nut, the left ends of the first semicircular ring and the second semicircular ring are rotationally connected through the pin shaft, and the right ends of the first semicircular ring and the second semicircular ring are fixed through the fastening bolt and the nut. The split type design is adopted, the wear-resistant sleeve on the outer layer can be replaced independently, and materials are saved.

Description

Technical Field

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

[0002] A sucker rod centralizer is a downhole tool used to prevent eccentric wear in pumping wells. It is primarily suitable for wells with eccentric wear, particularly wells with eccentric wear above the sucker rod neutral point and directional inclined wells. Its function is to reduce friction between the sucker rod and tubing, thereby extending the pumping unit's production life.

[0003] Chinese patent CN219953268U provides a sucker rod centralizer, comprising a centralizer body formed by two interlocking arc-shaped structures, with cooperating slots and inserts provided on adjacent sidewalls of the arc-shaped structures, wear rings provided on both sides of the outer surface of the centralizer body, a clamp provided between the wear rings, the clamp having an outer diameter smaller than that of the wear rings, a vacuum chamber provided in the middle of the inner side of the centralizer body, sealing portions provided on both sides of the vacuum chamber, the sealing portions corresponding to the clamps, and an air extraction hole provided on the sealing portion along the axial direction of the centralizer body, with a plug provided in the air extraction hole. The sucker rod centralizer provided by the utility model utilizes the air extraction hole to draw a vacuum into the vacuum chamber. The negative pressure within the vacuum chamber causes the centralizer body to be tightly attached to the sidewalls of the sucker rod, effectively increasing the overall compression and holding force of the centralizer after interlocking, improving the clamping stability of the centralizer, and preventing wear on the inner wall of the centralizer that could cause the centralizer to slip from the outside of the sucker rod.

[0004] The above patent generally adopts an integrated design. When the centralizer body is worn out and fails after long-term use, the entire centralizer needs to be replaced, resulting in material waste. Therefore, in view of the above situation, it is urgent to develop a sucker rod centralizer with a split design that can replace the outer wear-resistant sleeve separately to save materials, so as to overcome the shortcomings in current practical applications and meet current needs. Utility Model Content

[0005] The purpose of the utility model is to provide a sucker rod centralizer to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A sucker rod centralizer comprises an inner shell, a wear-resistant sleeve and a clamping mechanism, wherein two wear-resistant sleeves are detachably mounted on the outer side of the inner shell, two clamping strips are fixed on the inner side of the wear-resistant sleeves, and a clamping groove for clamping the clamping strips is provided on the inner shell. The two wear-resistant sleeves are fixed to the outer side of the inner shell by a clamping mechanism, and the clamping mechanism comprises: a first semicircular ring, a second semicircular ring, a pin shaft, a fastening bolt and a nut, the left ends of the first semicircular ring and the second semicircular ring are rotatably connected by a pin shaft, and the right ends of the first semicircular ring and the second semicircular ring are fixed by a fastening bolt and a nut.

[0008] Preferably, the wear-resistant sleeve is made of polyurethane material.

[0009] Preferably, the wear-resistant sleeve is provided with an installation groove for installing a pressing mechanism.

[0010] Preferably, a plurality of plug-in rods are fixed on one of the wear-resistant sleeves, and a plurality of plug-in holes for inserting the plug-in rods are provided on the other wear-resistant sleeve.

[0011] Preferably, an internal thread is provided on the inner side of the inner shell.

[0012] The beneficial effects of the present invention are as follows: the sucker rod centralizer secures two wear-resistant sleeves to the outside of the inner housing via a clamping mechanism, which is then mounted on the sucker rod. When the wear-resistant sleeves become worn after prolonged use, the fastening bolts and nuts are removed, the first and second semicircular rings are separated, and the two wear-resistant sleeves are then removed from the inner housing for replacement. In summary, the present invention adopts a split design, allowing the outer wear-resistant sleeve to be replaced separately, saving materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0014] Figure 2 This is an exploded view of the present invention.

[0015] Figure 3 This is a partial structural diagram of the utility model Figure 1 .

[0016] Figure 4 This is a partial structural diagram of the utility model Figure 2 .

[0017] Figure 5 This is a partial structural diagram of the utility model Figure 3 .

[0018] Legend:

[0019] 1. Inner shell; 101. Internal thread; 102. Slot; 2. Wear-resistant sleeve; 201. Mounting slot; 202. Clip strip; 3. Clamping mechanism; 301. First semicircular ring; 302. Second semicircular ring; 303. Pin; 304. Fastening bolt; 305. Nut; 4. Connecting rod; 5. Connecting hole. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0021] Specific examples are given below.

[0022] See also Figures 1 to 5 In the embodiment of the present utility model, a sucker rod centralizer includes an inner shell 1, a wear-resistant sleeve 2 and a pressing mechanism 3. The inner side of the inner shell 1 is provided with an internal thread 101, through which the inner shell 1 is tightened and fixed to the sucker rod. Two wear-resistant sleeves 2 are detachably installed on the outer side of the inner shell 1. The wear-resistant sleeve 2 is made of polyurethane material, which has good wear resistance and corrosion resistance. Two clips 202 are fixed on the inner side of the wear-resistant sleeve 2. A card slot 102 for clamping the card strip 202 is provided on the inner shell 1. The two clips The wear-resistant sleeve 2 is fixed to the outside of the inner shell 1 through a clamping mechanism 3. The wear-resistant sleeve 2 is provided with a mounting groove 201 for installing the clamping mechanism 3. A plurality of plug-in rods 4 are fixed on one of the wear-resistant sleeves 2, and a plurality of plug-in holes 5 for inserting the plug-in rods 4 are provided on the other wear-resistant sleeve 2. When in use, the two wear-resistant sleeves 2 are fixed to the outside of the inner shell 1 through the clamping mechanism 3, and then the inner shell 1 is installed on the sucker rod. When the wear-resistant sleeve 2 is worn after long-term use, the clamping mechanism 3 is removed, and then the two wear-resistant sleeves 2 are removed from the inner shell 1 for replacement.

[0023] The clamping mechanism 3 includes: a first semicircular ring 301, a second semicircular ring 302, a pin shaft 303, a fastening bolt 304 and a nut 305. The left ends of the first semicircular ring 301 and the second semicircular ring 302 are rotatably connected by the pin shaft 303, and the right ends of the first semicircular ring 301 and the second semicircular ring 302 are fixed by the fastening bolt 304 and the nut 305.

[0024] Working principle: The sucker rod centralizer fixes the two wear-resistant sleeves 2 to the outside of the inner shell 1 through the clamping mechanism 3, and then installs the inner shell 1 to the sucker rod. When the wear-resistant sleeves 2 are worn out after long-term use, the fastening bolts 304 and nuts 305 are unscrewed, and the first semicircular ring 301 and the second semicircular ring 302 are separated. Then, the two wear-resistant sleeves 2 are removed from the inner shell 1 for replacement.

[0025] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sucker rod centralizer, characterized in that: The invention comprises an inner shell (1), a wear-resistant sleeve (2) and a clamping mechanism (3), wherein two wear-resistant sleeves (2) are detachably mounted on the outer side of the inner shell (1), two clamping strips (202) are fixed on the inner side of the wear-resistant sleeve (2), and a clamping groove (102) for clamping the clamping strips (202) is provided on the inner shell (1). The two wear-resistant sleeves (2) are fixed to the outer side of the inner shell (1) through the clamping mechanism (3), and the clamping mechanism (3) comprises: a first semicircular ring (301), a second semicircular ring (302), a pin (303), a fastening bolt (304) and a nut (305), the left ends of the first semicircular ring (301) and the second semicircular ring (302) are rotatably connected through the pin (303), and the right ends of the first semicircular ring (301) and the second semicircular ring (302) are fixed through the fastening bolt (304) and the nut (305).

2. The sucker rod centralizer according to claim 1, characterized in that: The wear-resistant sleeve (2) is made of polyurethane material.

3. The sucker rod centralizer according to claim 1, characterized in that: The wear-resistant sleeve (2) is provided with a mounting groove (201) for mounting a pressing mechanism (3).

4. The sucker rod centralizer according to claim 1, characterized in that: A plurality of plug-in rods (4) are fixed on one of the wear-resistant sleeves (2), and a plurality of plug-in holes (5) for inserting the plug-in rods (4) are provided on the other wear-resistant sleeve (2).

5. The sucker rod centralizer according to any one of claims 1 to 4, characterized in that: An internal thread (101) is provided on the inner side of the inner shell (1).

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