Long life sucker rod centralizer

Abstract

The utility model discloses a long -life sucker rod centralizer, specifically relates to sucker rod centralizer technical field, including the main part, the inside of main part is equipped with the inner sheath, the outer sheath is equipped with the outer sheath of main part outer wall, the inner sheath inner wall is equipped with a plurality of annular array distribution's lubricating groove no.

Description

Technical Field

[0001] This utility model relates to the technical field of sucker rod centralizers, and more specifically to a long-life sucker rod centralizer. Background Technology

[0002] The sucker rod is a slender rod in a pumping unit well. It connects to the polished rod at the top and the pump at the bottom, transmitting power. Sucker rods are typically made of low-carbon alloy steel that has undergone quenching and tempering. They are connected one by one inside the tubing using internal threaded clamps, extending to the piston at the underground oil layer. Their reciprocating motion pumps oil. A sucker rod centralizer is a downhole tool used to prevent uneven wear in pumping wells. It is suitable for pumping wells with uneven wear, especially those with wear above the sucker rod neutral point and for directional wells.

[0003] For example, the prior art disclosure number CN216642017U describes a sucker rod centralizer. This utility model has a centralizer fitted on the rod body. The outer diameter of the centralizer is larger than the outer diameter of the sucker rod coupling, and the centralizer is fitted with the tubing with a clearance. During the pumping process, the centralizer will contact the inner wall of the tubing. The centralizer is made of a flexible material, thereby reducing the wear on the inner wall of the tubing and preventing uneven wear.

[0004] However, the existing technology described above still has the following problems in use: when the centralizer plays a centralizing role between the sucker rod and the tubing, the friction between it and the sucker rod and tubing is large, which will shorten the service life of the centralizer with long-term use. Based on this, the present invention provides a long-life sucker rod centralizer. Utility Model Content

[0005] To overcome the aforementioned deficiencies of the prior art, this utility model provides a long-life sucker rod centralizer. The centralizer is formed by combining an inner sheath, an outer sheath, a main body, and a fixing component. It has high overall strength and can play a stable centralizing role. The lubricating fluid in lubrication groove one and lubrication groove two form a lubricating layer on the contact surface between the inner sheath and the sucker rod, and on the contact surface between the outer sheath of the main body and the oil pipe, respectively. The dual lubrication structure can significantly reduce the friction of the centralizer during operation, thereby extending its service life and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a long-life sucker rod centralizer, comprising a main body, an inner sheath inside the main body, an outer sheath on the outer wall of the main body, a plurality of lubrication grooves I arranged in a circular array on the inner wall of the inner sheath, a plurality of lubrication grooves II arranged at equal intervals on the outer wall of the outer sheath, a sponge block fixedly arranged inside both lubrication groove I and lubrication groove II, and lubricating fluid stored inside both lubrication groove I and lubrication groove II, and a fixing component on the outer wall of the main body for connecting the main body, the inner sheath, and the outer sheath.

[0007] In a preferred embodiment, each lubrication tank 1 and each lubrication tank 2 are fixedly provided with multiple partitions arranged sequentially from top to bottom, and the partitions are located inside the sponge block. The multiple partitions divide the interior of lubrication tank 1 and lubrication tank 2 into multiple spaces, so as to facilitate the separate storage of lubricating fluid and avoid excessive leakage of lubricating fluid, thereby reducing the consumption of lubricating fluid to a certain extent.

[0008] In a preferred embodiment, the outer wall of the inner sheath is fixedly provided with a plurality of positioning blocks arranged in a circular array, and the inner wall of the main body is provided with positioning grooves corresponding to the positioning blocks. The positioning blocks are located inside the positioning grooves. By using the positioning blocks and positioning grooves in cooperation, the installation speed of the inner sheath can be improved, and the stability between the inner sheath and the main body can be improved.

[0009] In a preferred embodiment, the inner wall of the outer sheath is fixedly provided with a plurality of positioning blocks II arranged in a circular array, and the outer wall of the main body is provided with positioning grooves II corresponding to the positioning blocks II. The positioning blocks II are located inside the positioning grooves II. The positioning blocks II cooperate with the positioning grooves II, which can improve the installation speed of the outer sheath on the one hand, and improve the stability of the outer sheath on the other hand.

[0010] In a preferred embodiment, the fixing component includes a base and a cover plate, which are respectively disposed at the bottom and top of the main body. The top of the base is fixedly provided with a plurality of connecting plates arranged in a circular array. The bottom of the cover plate is provided with a connecting groove corresponding to the connecting plate. The connecting plate is disposed inside the connecting groove. By using the cover plate, connecting plate and base in cooperation, the connection firmness of the inner sheath, the main body and the outer sheath can be improved.

[0011] In a preferred embodiment, the top of the cover plate has a storage hole that communicates with the connecting groove. Each storage hole is equipped with a fastening bolt, which is fixed to the connecting plate. The fastening bolt fixing method facilitates later disassembly and maintenance.

[0012] In a preferred embodiment, the outer wall of the outer sheath has the same number of slots as the connecting plates. The multiple connecting plates are respectively disposed in the multiple slots, and the multiple slots and multiple lubrication grooves are distributed at intervals to accommodate the connecting plates and prevent the connecting plates from protruding outwards and affecting the normal use of the outer sheath.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] This utility model forms a centralizer by combining an inner sheath, an outer sheath, a main body, and a fixing component. It has high overall strength and can play a stable centralizing role when installed between the sucker rod and the tubing. At the same time, the lubricating fluid in the first and second lubrication grooves can slowly seep out through the sponge block, forming a lubricating layer on the contact surface between the inner sheath and the sucker rod, and on the contact surface between the outer sheath of the main body and the tubing, respectively. The dual lubrication structure can significantly reduce the friction of the centralizer during operation, thereby extending its service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the separation of the cover plate and the connecting plate of this utility model;

[0017] Figure 3 This is a top view of the inner sheath and the main body of this utility model;

[0018] Figure 4 This is a schematic diagram of the outer sheath and main body of this utility model;

[0019] Figure 5 This is a schematic diagram showing the separation of the cover plate and the connecting plate of this utility model.

[0020] The attached diagram is labeled as follows: 1. Main body; 2. Inner sheath; 3. Outer sheath; 4. Lubrication groove one; 5. Lubrication groove two; 6. Sponge block; 7. Fixing component; 8. Partition; 9. Positioning block one; 10. Positioning groove one; 11. Positioning block two; 12. Positioning groove two; 13. Storage hole; 14. Fastening bolt; 15. Embedded groove;

[0021] 71. Base; 72. Cover plate; 73. Connecting plate; 74. Connecting groove. 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] Refer to the instruction manual appendix Figures 1-5This utility model provides a long-life sucker rod centralizer, including a main body 1. The main body 1 has an inner sheath 2 inside, and an outer sheath 3 is fitted on the outer wall of the main body 1. The inner wall of the inner sheath 2 has a plurality of lubrication grooves 4 arranged in a ring array. The outer wall of the outer sheath 3 has a plurality of lubrication grooves 5 arranged at equal intervals. A sponge block 6 is fixedly installed inside the lubrication groove 4 and the lubrication groove 5. Lubricating fluid is stored inside the lubrication groove 4 and the lubrication groove 5. A plurality of partitions 8 are fixedly installed inside each lubrication groove 4 and each lubrication groove 5, arranged sequentially from top to bottom, and the partitions 8 are located inside the sponge block 6.

[0024] The outer wall of the main body 1 is provided with a fixing component 7 for connecting the main body 1, the inner sheath 2 and the outer sheath 3. Specifically, the fixing component 7 includes a base 71 and a cover plate 72, which are respectively located at the bottom and top of the main body 1. The top of the base 71 is fixed with a plurality of connecting plates 73 arranged in a circular array. The bottom of the cover plate 72 is provided with a connecting groove 74 corresponding to the connecting plates 73. The connecting plates 73 are located inside the connecting groove 74. The top of the cover plate 72 is provided with a storage hole 13 communicating with the connecting groove 74. Each storage hole 13 is provided with a fastening bolt 14, which is fixed to the connecting plate 73.

[0025] The outer sheath 3 has the same number of slots 15 as the connecting plates 73 on its outer wall. Multiple connecting plates 73 are respectively located inside multiple slots 15, and multiple slots 15 and multiple lubrication grooves 5 are distributed at intervals to accommodate the connecting plates 73 and prevent the connecting plates 73 from protruding outward and affecting the normal use of the outer sheath 3.

[0026] In practical use, the centralizer is composed of the inner sheath 2, the main body 1, and the outer sheath 3, and is reinforced by the cover plate 72, the connecting plate 73, and the base 71, thereby improving the strength of the centralizer. The main body 1, the inner sheath 2, and the outer sheath 3 can play a centralizing role between the sucker rod and the oil pipe, preventing the sucker rod from shifting and affecting its use. At the same time, the lubricating fluid in the first lubrication tank 4 seeps out through the sponge block 6 and can play a lubricating role between the inner sheath 2 and the sucker rod, while the lubricating fluid in the second lubrication tank 5 can play a lubricating role between the outer sheath 3 and the oil pipe, thereby effectively reducing the friction of the centralizer and thus improving its service life. In addition, multiple partitions 8 are used to divide the interior of the first lubrication tank 4 and the second lubrication tank 5 into multiple spaces, which facilitates the separate storage of lubricating fluid and avoids excessive leakage of lubricating fluid, thereby reducing the consumption of lubricating fluid to a certain extent.

[0027] Refer to the instruction manual appendix Figures 1-5The inner sheath 2 has multiple positioning blocks 9 arranged in a ring array fixed on its outer wall. The main body 1 has a positioning groove 10 corresponding to the positioning blocks 9 on its inner wall. The positioning blocks 9 are located inside the positioning groove 10. The outer sheath 3 has multiple positioning blocks 11 arranged in a ring array fixed on its inner wall. The main body 1 has a positioning groove 12 corresponding to the positioning blocks 11 on its outer wall. The positioning blocks 11 are located inside the positioning groove 12.

[0028] When installing the inner sheath 2, the workers can quickly insert the inner sheath 2 into the body 1 with the help of positioning block 1 9 and positioning groove 10. The design of positioning block 2 11 and positioning groove 2 12 can improve the speed of installing the outer sheath 3, making installation and disassembly very convenient. In addition, positioning block 1 9 and positioning block 2 11 can also improve the stability between the inner sheath 2, the outer sheath 3 and the body 1.

[0029] In conclusion, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A long-life sucker rod centralizer, comprising a main body (1), characterized in that: The main body (1) is provided with an inner sleeve (2) inside, and an outer sleeve (3) is provided on the outer wall of the main body (1). The inner wall of the inner sleeve (2) is provided with a plurality of lubrication grooves (4) arranged in a ring array. The outer wall of the outer sleeve (3) is provided with a plurality of lubrication grooves (5) arranged at equal intervals. Sponge blocks (6) are fixedly provided inside both the lubrication grooves (4) and the lubrication grooves (5). The lubricating tank 1 (4) and the lubricating tank 2 (5) are both filled with lubricating fluid. The outer wall of the main body (1) is provided with a fixing component (7) for connecting the main body (1), the inner sleeve (2) and the outer sleeve (3).

2. The long-life sucker rod centralizer according to claim 1, characterized in that: Each lubrication groove 1 (4) and each lubrication groove 2 (5) are fixedly provided with multiple partitions (8) arranged sequentially from top to bottom, and the partitions (8) are located inside the sponge block (6).

3. The long-life sucker rod centralizer according to claim 1, characterized in that: The outer wall of the inner sheath (2) is fixed with a plurality of positioning blocks (9) arranged in a ring array. The inner wall of the main body (1) is provided with a positioning groove (10) corresponding to the positioning blocks (9). The positioning blocks (9) are located inside the positioning groove (10).

4. The long-life sucker rod centralizer according to claim 1, characterized in that: The inner wall of the outer sheath (3) is fixed with a plurality of positioning blocks (11) arranged in a ring array. The outer wall of the main body (1) is provided with positioning grooves (12) corresponding to the positioning blocks (11). The positioning blocks (11) are located inside the positioning grooves (12).

5. A long-life sucker rod centralizer according to claim 1, characterized in that: The fixing component (7) includes a base (71) and a cover plate (72), which are respectively located at the bottom and top of the main body (1). The top of the base (71) is fixed with a plurality of connecting plates (73) arranged in a ring array. The bottom of the cover plate (72) is provided with a connecting groove (74) corresponding to the connecting plate (73), and the connecting plate (73) is located inside the connecting groove (74).

6. A long-life sucker rod centralizer according to claim 5, characterized in that: The top of the cover plate (72) is provided with a storage hole (13) that communicates with the connecting groove (74). Each storage hole (13) is provided with a fastening bolt (14), which is fixed to the connecting plate (73).

7. A long-life sucker rod centralizer according to claim 5, characterized in that: The outer sheath (3) has grooves (15) on its outer wall, the same number as the connecting plates (73). Multiple connecting plates (73) are respectively located inside multiple grooves (15), and multiple grooves (15) and multiple lubrication grooves (5) are distributed at intervals.

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