High-temperature-resistant and wear-resistant sucker rod centralizer

Abstract

The invention relates to the technical field of sucker rod centralizers, and discloses a high-temperature-resistant and wear-resistant sucker rod centralizer which comprises a center column, a centralizing auxiliary mechanism, a centralizing mechanism, a telescopic mechanism, an anti-blocking mechanism and a connecting mechanism, four connecting grooves are formed in the outer side face of the center column, and side grooves are formed in the inner walls of the top ends and the inner walls of the bottom ends of the connecting grooves; a through hole is formed in the inner side wall of the side groove; the anti-blocking mechanism comprises an air pump and a battery box, the air pump and the battery box are fixedly connected to the upper surface of the connecting box, an air outlet of the air pump communicates with an air guide pipe, the end, away from the air pump, of the air guide pipe communicates with an inner containing cavity of the filter screen, and air spraying holes are formed in the upper surface and the lower surface of the end, close to the righting mechanism, of the hollow pipe. The inner side wall of the gas spraying hole is fixedly connected with a filter screen; through the cooperation of the structure, blockages near the roller can be dispersed, the roller is prevented from being blocked and abraded, and the abrasion resistance is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sucker rod centralizers, in particular to a high temperature resistant and wear resistant sucker rod centralizer. Background Art

[0002] During the oil production process in the oil field, when the sucker rod reciprocates in the well, the sucker rod bends when it goes down due to well inclination, tubing bending or large resistance of the pump plunger, thereby increasing the friction resistance between the sucker rod and the tubing. In severe cases, the sucker rod coupling may wear through the tubing. To avoid the above situation, a centralizer has been used in the sucker rod of conventional oil production wells.

[0003] Referring to the announcement number CN216866603U, a high-temperature and wear-resistant sucker rod straightener comprises: a sucker rod body and a sucker rod straightening mechanism installed on the top of the sucker rod body; wherein the sucker rod straightening mechanism comprises a central column and a plurality of sucker rod straightening assemblies, and the plurality of sucker rod straightening assemblies are arranged around the edge of the central column at equal distances with the central line of the central column as the axis; wherein the sucker rod straightening assembly comprises a mounting shell, a symmetrically arranged connecting spring is fixedly connected to the inner wall of the mounting shell, the other ends of the two connecting springs are fixedly connected through a movable plate, and the edge of the movable plate is slidably connected to the inner wall of the mounting shell, a symmetrically arranged limit slide is fixedly connected to the side of the movable plate away from the connecting spring, an end of the limit slide away from the movable plate movably penetrates the mounting shell and extends to the outside of the mounting shell, and the ends of the two limit slides away from the movable plate are fixedly connected through a mounting seat, and two symmetrically arranged mounting shafts are fixedly connected to the mounting seat, and the two mounting shafts are rotatably connected with limit support rollers matching the mounting shafts.

[0004] In the process of implementing this application, it was found that the technology has the following problems: in the above patent documents, when the sucker rod is straightened, the side wall of the roller will roll with the inner wall of the oil pipe, and in oil well operations, various impurities and sediments may exist in the oil pipe, such as wax, mud, etc. These impurities may enter the gap between the roller and the mounting seat during the up and down movement of the sucker rod, which may cause the pulley to be blocked or rotate poorly. Over time, it will not only cause wear on the inner wall of the oil pipe, but also on the roller, affecting the wear resistance.

[0005] For this reason, we propose a sucker rod centralizer which is resistant to high temperature and wear. Summary of the invention

[0006] The purpose of the present invention is to provide a high temperature and wear resistant sucker rod centralizer in order to disperse the blockage near the roller, prevent the roller from being blocked and caused by wear, and improve the wear resistance.

[0007] The technical solution adopted by the present invention is as follows: A high temperature and wear resistant sucker rod centralizer, comprising a center column, a centralizing auxiliary mechanism, a centralizing mechanism, a telescopic mechanism, an anti-blocking mechanism and a connecting mechanism, wherein the outer side surface of the center column is provided with four connecting grooves, the top inner wall and the bottom inner wall of the connecting groove are provided with side grooves, and the inner side wall of the side groove is provided with a through hole; The righting auxiliary mechanism comprises a connection box, a connection block is fixedly connected to one side of the connection box, positioning holes are provided on the upper and lower surfaces of the connection block, and the inner surface of the connection groove is plugged into the outer surface of the connection block; The telescopic mechanism includes a spring 1, the spring 1 is fixedly connected to the inner wall of the connection box on one side close to the connection block, the other end of the spring 1 is fixedly connected to a slide plate, the end of the slide plate away from the spring 1 is fixedly connected to a hollow tube, and the outer surface of the end of the hollow tube away from the slide plate moves through the connection box and is connected to the straightening mechanism; The straightening mechanism comprises a U-shaped seat, an end of the hollow tube away from the slide extends into the groove of the U-shaped seat, the inner side wall of the U-shaped seat is fixedly connected to a connecting shaft, and the outer surface of the connecting shaft is rotatably connected to a roller; The anti-blocking mechanism includes an air pump and a battery box, the air pump and the battery box are fixedly connected to the upper surface of the connection box, the air outlet of the air pump is connected to an air duct, the end of the air duct away from the air pump is connected to the internal volume of the filter net, the upper surface and lower surface of the end of the hollow tube close to the straightening mechanism are provided with air jet holes, and the inner side wall of the air jet hole is fixedly connected to the filter net.

[0008] In a preferred embodiment of the invention, the connecting mechanism includes a plug post, the outer surface of the plug post is slidably connected to the inner surface of the side groove, the inner wall of the side groove close to the through hole is fixedly connected with a spring 2, and the end of the spring 2 away from the through hole is fixedly connected to the plug post.

[0009] In a preferred embodiment of the invention, a pull rod is fixedly connected to the middle of a side surface of the plug post close to the second spring, and an end of the pull rod away from the plug post passes through the second spring and the through hole and is fixedly connected to a pulling block.

[0010] In a preferred embodiment of the invention, the inner surface of the positioning hole is plugged into the outer surface of the plug post.

[0011] In a preferred embodiment of the invention, a threaded mounting seat is fixedly connected to the lower surface of the central column.

[0012] In a preferred embodiment of the invention, the inner surface of the lower end of the threaded mounting seat is threadedly connected to the sucker rod body.

[0013] In a preferred embodiment of the invention, the length of the plug post is greater than the depth of the positioning hole.

[0014] In a preferred embodiment of the invention, the output end of the battery box is electrically connected to the input end of the air pump.

[0015] In a preferred embodiment of the invention, the outer surface of the central column is provided with a high temperature resistant coating.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, when the straightening auxiliary mechanism and the straightening mechanism are used for straightening, the side of the roller close to the U-shaped seat may be clogged with wax and mud, thereby aggravating the friction with the inner wall of the oil pipe. At this time, the air pump can be started to pump the external air. The pumped air can be pressurized and then pass through the air guide pipe and the hollow pipe to spray gas from the jet hole. The sprayed gas can disperse the blockage at the roller, thereby ensuring that the roller can continue to rotate and avoiding the roller from getting stuck and causing wear. Through the cooperation of the above structures, the blockage near the roller can be dispersed to prevent the roller from being blocked and causing wear, thereby improving the wear resistance.

[0017] 2. In the present invention, when the righting assisting mechanism needs to be repaired or replaced, the pulling block can be pulled so that the pulling rod drives the plug column to leave the positioning hole and compress the second spring to move into the side groove, and the righting assisting mechanism can be separated from the center column at this time; after the righting assisting mechanism is repaired or replaced with a new one, the connecting block can be embedded into the connecting groove so that the positioning hole is aligned with the side groove, and then the pulling block can be released, and at this time, the plug column will be driven to be inserted into the positioning hole under the elastic reset action of the second spring, so that the righting assisting mechanism and the center column can be connected; through the cooperation of the above structures, the convenience of disassembling and assembling the righting assisting mechanism and the righting mechanism can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a stereogram of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 is an external schematic diagram of the righting auxiliary mechanism of the present invention; Figure 4 It is invented Figure 2 A magnified image of point A; Figure 5 The present invention Figure 2 Enlarged view of point B.

[0019] Explanation of the reference numerals: 1-center column; 2-righting auxiliary mechanism; 3-righting mechanism; 4-telescopic mechanism; 5-anti-blocking mechanism; 6-connecting mechanism; 11-threaded mounting seat; 12-sucker rod body; 13-connecting groove; 14-side groove; 15-through hole; 21-connecting box; 22-connecting block; 23-positioning hole; 31-U-shaped seat; 32-connecting shaft; 33-roller; 41-spring one; 42-slide plate; 43-hollow tube; 44-jet hole; 45-filter screen; 51-air pump; 52-battery box; 53-air guide tube; 61-insert column; 62-spring two; 63-pull rod; 64-pull block. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0021] The following will be combined Figure 1-Figure 5 A high temperature resistant and wear resistant sucker rod centralizer according to an embodiment of the present invention is described in detail. Example

[0022] Reference Figure 1-Figure 5A high temperature and wear resistant sucker rod centralizer, comprising a center column 1, a central auxiliary mechanism 2, a central auxiliary mechanism 3, a telescopic mechanism 4, an anti-blocking mechanism 5 and a connecting mechanism 6. The lower surface of the central column 1 is fixedly connected with a threaded mounting seat 11, the outer surface of the central column 1 is provided with a high temperature resistant coating, the lower end inner surface of the threaded mounting seat 11 is threadedly connected with a sucker rod body 12, the outer side surface of the central column 1 is provided with four connecting grooves 13, the top inner wall and the bottom inner wall of the connecting groove 13 are provided with side grooves 14, and the inner side wall of the side groove 14 is provided with a through hole 15; the central auxiliary mechanism 2 comprises a connecting box 21, one side of the connecting box 21 is fixedly connected with a connecting block 22, the upper surface and the lower surface of the connecting block 22 are provided with positioning holes 23, and the inner surface of the connecting groove 13 is plugged into the outer surface of the connecting block 22; the telescopic mechanism 4 comprises a spring 41, and the spring 41 is fixedly connected to the connecting box 21 On the inner wall of one side close to the connecting block 22, the other end of the spring 41 is fixedly connected with a slide plate 42, and the end of the slide plate 42 away from the spring 41 is fixedly connected with a hollow tube 43, and the outer surface of the end of the hollow tube 43 away from the slide plate 42 is movable through the connecting box 21 and connected with the straightening mechanism 3; the straightening mechanism 3 includes a U-shaped seat 31, a hollow tube 43, and the end of the hollow tube 43 away from the slide plate 42 extends into the groove of the U-shaped seat 31, and the inner side wall of the U-shaped seat 31 is fixedly connected with a connecting shaft 32, and the outer surface of the connecting shaft 32 is rotatably connected with a roller 33; specifically, the sucker rod body 12 is threadedly installed on the central column 1 through the threaded mounting seat 11. When the sucker rod body 12 enters the oil well, it will be rollingly connected to the inner wall of the oil well through the roller 33. At this time, the spring 41, the slide plate 42 and the hollow tube 43 ensure that the straightening mechanism 3 has telescopic performance and can adapt to oil wells of different calibers.

[0023] Reference Figure 1-Figure 5The anti-blocking mechanism 5 includes an air pump 51 and a battery box 52, which are fixedly connected to the upper surface of the connection box 21. The air outlet of the air pump 51 is connected to an air guide pipe 53, and the end of the air guide pipe 53 away from the air pump 51 is connected to the internal volume of the filter 45. The upper and lower surfaces of the end of the hollow tube 43 close to the straightening mechanism 3 are provided with jet holes 44, and the inner side wall of the jet hole 44 is fixedly connected to the filter 45. The output end of the battery box 52 is electrically connected to the input end of the air pump 51; specifically, when the sucker rod body 12 is straightened by the straightening auxiliary mechanism 2 and the straightening mechanism 3, the roller The side of the wheel 33 close to the U-shaped seat 31 may be clogged with wax and mud, thereby increasing the friction with the inner wall of the oil pipe. At this time, the air pump 51 can be started to pump external air. The pumped air can be pressurized and then pass through the air guide pipe 53 and the hollow tube 43 to eject gas from the jet hole 44. The ejected gas can disperse the blockage at the roller 33, thereby ensuring that the roller 33 can continue to rotate and avoiding the roller 33 from getting stuck and causing wear. Through the cooperation of the above structure, the blockage near the roller 33 can be dispersed to prevent the roller 33 from being blocked and causing wear, thereby improving wear resistance.

[0024] Reference Figure 1-Figure 5 The connecting mechanism 6 includes a plug post 61, the outer surface of the plug post 61 is slidably connected to the inner surface of the side groove 14, the inner side wall of the side groove 14 near the through hole 15 is fixedly connected with a spring 2 62, the end of the spring 2 62 away from the through hole 15 is fixedly connected to the plug post 61, and the middle part of the side of the plug post 61 near the spring 2 62 is fixedly connected with a pull rod 63, and the end of the pull rod 63 away from the plug post 61 passes through the spring 2 62 and the through hole 15 and is fixedly connected with a pulling block 64, the inner surface of the positioning hole 23 is plugged into the outer surface of the plug post 61, and the length of the plug post 61 is greater than the depth of the positioning hole 23; specifically, when the straightening auxiliary mechanism 2 needs to be repaired or replaced, the pull rod 63 can be pulled to The moving block 64 causes the pull rod 63 to drive the plug column 61 to leave the positioning hole 23 and compress the spring 2 62 to move into the side groove 14. At this time, the straightening auxiliary mechanism 2 can be separated from the center column 1; when the new straightening auxiliary mechanism 2 is repaired or replaced, the connecting block 22 can be embedded in the connecting groove 13 to align the positioning hole 23 with the side groove 14, and then the pulling block 64 can be released. At this time, the elastic reset action of the spring 2 62 will drive the plug column 61 to be inserted into the positioning hole 23, so that the straightening auxiliary mechanism 2 and the center column 1 can be connected; through the cooperation of the above structures, the convenience of disassembling and assembling the straightening auxiliary mechanism 2 and the straightening mechanism 3 can be improved.

[0025] The implementation principle of the high temperature and wear resistant sucker rod centralizer of the present application is as follows: When using the device, the sucker rod body 12 is threadedly installed on the central column 1 through the threaded mounting seat 11. When the sucker rod body 12 enters the oil well, it will be rollingly connected to the inner wall of the oil well through the roller 33. At this time, the spring 41, the slide plate 42 and the hollow tube 43 ensure that the straightening mechanism 3 has telescopic performance and can adapt to oil wells of different calibers.

[0026] When the straightening auxiliary mechanism 2 and the straightening mechanism 3 are used for straightening, the side of the roller 33 close to the U-shaped seat 31 may be clogged with wax and mud, thereby increasing the friction with the inner wall of the oil pipe. At this time, the air pump 51 can be started to pump the external air. The pumped air can be pressurized and then pass through the air guide pipe 53 and the hollow tube 43 to eject gas from the jet hole 44. The ejected gas can disperse the blockage at the roller 33, thereby ensuring that the roller 33 can continue to rotate and avoiding the roller 33 from getting stuck and causing wear. Through the cooperation of the above structures, the blockage near the roller 33 can be dispersed to prevent the roller 33 from being blocked and causing wear, thereby improving the wear resistance.

[0027] When the righting auxiliary mechanism 2 needs to be repaired or replaced, the pulling block 64 can be pulled to make the pulling rod 63 drive the plug column 61 to leave the positioning hole 23 and compress the spring 2 62 to move into the side groove 14. At this time, the righting auxiliary mechanism 2 can be separated from the center column 1; after the righting auxiliary mechanism 2 is repaired or replaced with a new one, the connecting block 22 can be embedded into the connecting groove 13 to align the positioning hole 23 with the side groove 14, and then the pulling block 64 can be released. At this time, the elastic reset action of the spring 2 62 will drive the plug column 61 to be inserted into the positioning hole 23, so that the righting auxiliary mechanism 2 and the center column 1 can be connected; through the cooperation of the above structures, the convenience of disassembling and assembling the righting auxiliary mechanism 2 and the righting mechanism 3 can be improved.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high temperature and wear resistant sucker rod centralizer, comprising a center column (1), a centralizing auxiliary mechanism (2), a centralizing mechanism (3), a telescopic mechanism (4), an anti-blocking mechanism (5) and a connecting mechanism (6), characterized in that: Four connecting grooves (13) are formed on the outer side surface of the central column (1), side grooves (14) are formed on the top inner wall and the bottom inner wall of the connecting groove (13), and through holes (15) are formed on the inner side walls of the side grooves (14); The righting auxiliary mechanism (2) comprises a connection box (21), a connection block (22) is fixedly connected to one side of the connection box (21), positioning holes (23) are provided on the upper and lower surfaces of the connection block (22), and the inner surface of the connection groove (13) is plugged into the outer surface of the connection block (22); The telescopic mechanism (4) comprises a spring 1 (41), wherein the spring 1 (41) is fixedly connected to an inner wall of one side of the connection box (21) close to the connection block (22), the other end of the spring 1 (41) is fixedly connected to a slide plate (42), the end of the slide plate (42) away from the spring 1 (41) is fixedly connected to a hollow tube (43), and the outer surface of the end of the hollow tube (43) away from the slide plate (42) moves through the connection box (21) and is connected to the straightening mechanism (3); The straightening mechanism (3) comprises a U-shaped seat (31), the hollow tube (43), one end of the hollow tube (43) away from the slide plate (42) extending into the interior of the groove of the U-shaped seat (31), the inner side wall of the U-shaped seat (31) is fixedly connected to a connecting shaft (32), and the outer surface of the connecting shaft (32) is rotatably connected to a roller (33); The anti-blocking mechanism (5) comprises an air pump (51) and a battery box (52), the air pump (51) and the battery box (52) being fixedly connected to the upper surface of the connection box (21), the air outlet of the air pump (51) being connected to an air guide pipe (53), the end of the air guide pipe (53) away from the air pump (51) being connected to the internal volume of the filter screen (45), the upper surface and the lower surface of the end of the hollow tube (43) close to the straightening mechanism (3) being provided with air jet holes (44), the inner side wall of the air jet hole (44) being fixedly connected to the filter screen (45).

2. The high temperature and wear resistant sucker rod centralizer according to claim 1, characterized in that: The connecting mechanism (6) comprises a plug post (61), the outer surface of the plug post (61) is slidably connected to the inner surface of the side groove (14), a spring 2 (62) is fixedly connected to the inner wall of the side groove (14) close to the through hole (15), and one end of the spring 2 (62) away from the through hole (15) is fixedly connected to the plug post (61).

3. The high temperature and wear resistant sucker rod centralizer according to claim 2, characterized in that: A pull rod (63) is fixedly connected to the middle of a side surface of the plug post (61) close to the second spring (62), and an end of the pull rod (63) away from the plug post (61) passes through the second spring (62) and the through hole (15) and is fixedly connected to a pulling block (64).

4. The high temperature and wear resistant sucker rod centralizer according to claim 3, characterized in that: The inner surface of the positioning hole (23) is plugged into the outer surface of the plug post (61).

5. The high temperature and wear resistant sucker rod centralizer according to claim 1, characterized in that: A threaded mounting seat (11) is fixedly connected to the lower surface of the central column (1).

6. The high temperature and wear resistant sucker rod centralizer according to claim 5, characterized in that: The inner surface of the lower end of the threaded mounting seat (11) is threadedly connected to a sucker rod body (12).

7. The high temperature and wear resistant sucker rod centralizer according to claim 3, characterized in that: The length of the plug post (61) is greater than the depth of the positioning hole (23).

8. The high temperature and wear resistant sucker rod centralizer according to claim 1, characterized in that: The output end of the battery box (52) is electrically connected to the input end of the air pump (51).

9. The high temperature and wear resistant sucker rod centralizer according to claim 1, characterized in that: The outer surface of the central column (1) is provided with a high temperature resistant coating.

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