Centralizer for oil well sucker rod

Abstract

The centralizer comprises a centralizer body and a reinforcing assembly, a rod passing pipe is fixedly installed in the middle of the interior of the centralizer body in a penetrating mode, an oil passing groove is formed between the centralizer body and the rod passing pipe, and a connecting groove is formed in the position, close to the top, of the outer wall of the rod passing pipe. A filter basket is fixedly installed in the oil passing groove and close to the connecting groove, and reinforcing assemblies are symmetrically arranged at the top and the bottom in the centralizer body. According to the centralizer for the oil well sucker rod, the sucker rod is fixed through the reinforcing assembly, use is more stable, oil can enter the oil passing groove through the through groove and overflow through the connecting groove, and fine sand is conveniently prevented from floating upwards along with oil through the arranged filter basket; the sucker rod centralizer solves the technical problems that an existing sucker rod centralizer is poor in fixing performance on a sucker rod, the sucker rod may fall off in the oil extraction process, and in the continuous upward moving process of the sucker rod, fine sand causes serious abrasion between the sucker rod and the centralizer, and use is affected.

Description

Technical Field

[0001] This utility model relates to the field of centralizers for sucker rods, and more particularly to a centralizer for sucker rods in oil wells. Background Technology

[0002] Sucker rod centralizers are downhole tools used to prevent uneven wear in oil wells. They are suitable for wells with uneven wear, especially for wells with uneven wear above the sucker rod neutral point and directional wells. Below the sucker rod neutral point, they work even better with the nylon centralizer on the sucker rod body. As the sucker rod moves up and down inside the tubing, its elastic deformation easily causes friction between the rod and the tubing wall, leading to potential breakage. Sucker rod centralizers are highly flexible and contact the inner wall of the tubing, reducing friction and extending the oil production life of the pumping unit.

[0003] Existing sucker rod centralizers have poor stability in securing the sucker rod, which may cause the sucker rod to detach during oil extraction. Furthermore, as the sucker rod moves upward, fine sand causes severe wear between the sucker rod and the centralizer, affecting its use. To address these issues, we have developed a centralizer for oil well sucker rods. Summary of the Invention

[0004] This utility model discloses a centralizer for oil well sucker rods, aiming to solve the technical problems of poor fixation of sucker rods by existing sucker rod centralizers, which may cause sucker rods to fall off during oil production, and the severe wear between the sucker rod and the centralizer caused by fine sand during the continuous upward movement of the sucker rod, affecting its use.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A centralizer for oil well sucker rods includes a centralizer body and reinforcing components. A rod guide tube is fixedly installed through the center of the centralizer body. An oil passage groove is formed between the centralizer body and the rod guide tube. A spring ring gasket is fixedly installed on the inner wall of the rod guide tube. A connecting groove is formed on the outer wall of the rod guide tube near the top. A filter basket is fixedly installed inside the oil passage groove near the connecting groove. Through grooves are symmetrically formed on both sides of the rod guide tube near the bottom. Reinforcing components are symmetrically arranged at the top and bottom of the centralizer body.

[0007] During use, the sucker rod is passed through the rod tube inside the centralizer body and fixed by a reinforcing component, making it more stable. Oil can enter the oil channel through the through groove and overflow through the connecting groove. The filter basket helps prevent fine sand from floating with the oil. This solves the technical problems of poor fixation of the sucker rod in existing sucker rod centralizers, which may cause the sucker rod to fall off during oil extraction. In addition, as the sucker rod moves upward, fine sand causes severe wear between the sucker rod and the centralizer, affecting its use.

[0008] In a preferred embodiment, the reinforcement component includes a first fixing seat. A first fixing seat is fixedly installed on one side of the top and bottom of the main body of the centralizer. A threaded rod is threadedly connected to the main body of the centralizer near the corresponding first fixing seat. A second fixing seat is rotatably connected to the threaded rod near the first fixing seat. A damping element is fixedly installed in the middle of the side where the first and second fixing seats are close together. Telescopic rods are fixedly installed on the side where the first and second fixing seats are close together and on both sides of the damping element. One side of the damping element and the telescopic rod are connected by a clamping plate. A spring is sleeved on the outer side of the damping element. The two ends of one spring are fixedly connected to the first fixing seat and the clamping plate, respectively, and the two ends of the other spring are fixedly connected to the second fixing seat and the clamping plate, respectively.

[0009] By setting up a reinforcement component, the sucker rod passes through the rod tube inside the centralizer body. By rotating the two threaded rods, the No. 2 fixing seat moves towards the sucker rod. The sucker rod is further fixed by the damping components, telescopic rod, clamping plate and spring, making it more stable. This solves the problem of poor fixation of the sucker rod by related technologies, which may cause the sucker rod to fall off during oil production.

[0010] In a preferred embodiment, a limiting rod is fixedly installed at one end of each of the second fixing seats. A limiting groove is formed inside the body of the centralizer and on the side near the limiting rod. The limiting rod extends into the limiting groove and is slidably connected to the limiting groove. A rotating block is fixedly installed at the end of each of the threaded rods away from the second fixing seat. An avoidance groove is formed on the outer side of the centralizer body and near the threaded rod. The rotating block extends into the avoidance groove and is rotatably connected.

[0011] The limiting rod installed on one side of the No. 2 fixed seat extends into the limiting groove and slides into the limiting groove, which helps to enhance the stability of the movement of the No. 2 fixed seat.

[0012] In a preferred embodiment, the top and bottom walls of the oil trough are configured as symmetrical inclined surfaces.

[0013] Setting the top and bottom walls of the oil tank as symmetrical slopes facilitates the flow of oil.

[0014] In a preferred embodiment, a sleeve is fixedly installed on the outer side of the centralizer body, and ball bearings are rotatably connected to the outer circumferential array of the sleeve.

[0015] By incorporating sleeves and ball bearings, the sliding convenience between the centralizer body and the external oil pipe is enhanced.

[0016] In a preferred embodiment, the spring ring washer is made of an elastic material.

[0017] Setting the spring ring gasket to be made of elastic material helps to strengthen the connection between the sucker rod and the centralizer body and the through tube, making the connection tighter.

[0018] The centralizer for oil well sucker rods provided by this utility model has the following advantages:

[0019] Firstly, during use, the sucker rod is passed through the rod tube inside the centralizer body and fixed by a reinforcing component, making it more stable. Oil can enter the oil channel through the through groove and overflow through the connecting groove. The filter basket helps prevent fine sand from floating with the oil. This solves the technical problems of poor fixation of the sucker rod in existing sucker rod centralizers, which may cause the sucker rod to fall off during oil extraction. Furthermore, as the sucker rod moves upward, fine sand causes severe wear between the sucker rod and the centralizer, affecting its use. Attached Figure Description

[0020] Figure 1 This is a front view schematic diagram of a centralizer for oil well sucker rods proposed in this utility model.

[0021] Figure 2 This is a front cross-sectional view of a centralizer for oil well sucker rods proposed in this utility model.

[0022] Figure 3 This is a three-dimensional schematic diagram of a reinforcing component in a centralizer for oil well sucker rods proposed in this utility model.

[0023] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0024] In the attached diagram: 1. Main body of the centralizer; 2. Sleeve; 21. Ball bearing; 3. Through rod tube; 4. Reinforcing assembly; 41. First fixing seat; 42. Threaded rod; 43. Second fixing seat; 44. Damping component; 45. Telescopic rod; 46. Clamping plate; 47. Spring; 48. Limiting rod; 49. Limiting groove; 410. Rotating block; 411. Clearance groove; 5. Oil passage groove; 6. Connecting groove; 7. Filter basket; 8. Spring ring washer; 9. Through groove. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] The centralizer disclosed in this utility model for oil well sucker rods is mainly used in scenarios where thermocouple temperature sensors are installed.

[0027] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 A centralizer for oil well sucker rods includes: a centralizer body 1 and a reinforcing component 4. A rod guide tube 3 is fixedly installed through the middle of the centralizer body 1. An oil passage groove 5 is opened between the centralizer body 1 and the rod guide tube 3. A spring ring gasket 8 is fixedly installed on the inner wall of the rod guide tube 3. A connecting groove 6 is opened on the outer wall of the rod guide tube 3 near the top. A filter basket 7 is fixedly installed inside the oil passage groove 5 near the connecting groove 6. Through grooves 9 are symmetrically opened on both sides of the rod guide tube 3 near the bottom. The reinforcing component 4 is symmetrically arranged at the top and bottom of the centralizer body 1.

[0028] In this embodiment, the sucker rod is passed through the rod tube 3 inside the centralizer body 1 during use, and is fixed by the reinforcing component 4, making it more stable. Oil can enter the oil passage 5 through the through groove 9 and overflow through the connecting groove 6. The filter basket 7 helps prevent fine sand from floating with the oil. This solves the technical problems of poor fixation of the sucker rod in existing sucker rod centralizers, which may cause the sucker rod to fall off during oil extraction. Furthermore, as the sucker rod moves upward, fine sand causes severe wear between the sucker rod and the centralizer, affecting its use.

[0029] The reinforcement component 4 includes a first fixing seat 41. A first fixing seat 41 is fixedly installed on one side of the top and bottom of the main body 1 of the centralizer. A threaded rod 42 is threadedly connected to each corresponding first fixing seat 41 inside the main body 1. A second fixing seat 43 is rotatably connected to each threaded rod 42 on the side of the threaded rod 42 near the first fixing seat 41. A damping element 44 is fixedly installed between the first fixing seat 41 and the second fixing seat 43 on their adjacent sides. Telescopic rods 45 are fixedly installed on both sides of the damping element 44 on the adjacent side of the first fixing seat 41 and the second fixing seat 43. One side of the damping element 44 and the telescopic rods 45 are connected by a clamp 46. The outer side of the damping element 44... Each component is fitted with a spring 47. The two ends of one spring 47 are fixedly connected to the first fixing seat 41 and the clamping plate 46, respectively. The two ends of the other spring 47 are fixedly connected to the second fixing seat 43 and the clamping plate 46, respectively. By setting the reinforcing component 4, the sucker rod passes through the rod tube 3 inside the centralizer body 1. By rotating the two threaded rods 42, the second fixing seat 43 is moved towards the sucker rod. The sucker rod is further fixed by the damping component 44, the telescopic rod 45, the clamping plate 46 and the spring 47, making it more stable. This solves the problem that the sucker rod centralizer has poor fixation and may fall off during oil extraction.

[0030] In this device, a limiting rod 48 is fixedly installed at one end of each of the two fixed bases 43. A limiting groove 49 is opened inside the main body 1 of the stabilizer and on the side near the limiting rod 48. The limiting rod 48 extends into the limiting groove 49 and is slidably connected to the limiting groove 49. A rotating block 410 is fixedly installed at the end of the threaded rod 42 away from the two fixed bases 43. An avoidance groove 411 is opened on the outer side of the main body 1 and near the threaded rod 42. The rotating block 410 extends into the avoidance groove 411 and is rotatably connected. The limiting rod 48 set on one side of the two fixed bases 43, and the limiting rod 48 extends into the limiting groove 49 and is slidably connected to the limiting groove 49, helps to enhance the stability of the movement of the two fixed bases 43.

[0031] The top and bottom walls of the oil trough 5 are designed as symmetrical slopes; this symmetrical slope design facilitates the flow of oil.

[0032] Among them, a sleeve 2 is fixedly installed on the outer side of the centralizer body 1, and a ball bearing 21 is rotatably connected to the outer circumferential array of the sleeve 2; by setting the sleeve 2 and the ball bearing 21, it is beneficial to enhance the convenience of sliding between the centralizer body 1 and the external oil pipe.

[0033] Among them, the spring ring gasket 8 is made of elastic material; by setting the spring ring gasket 8 to be made of elastic material, it is beneficial to strengthen the connection between the sucker rod and the centralizer body 1 and the rod tube 3 more tightly.

[0034] Working principle: During use, the sucker rod is passed through the rod passage tube 3 inside the centralizer body 1. The reinforcing component 4 further secures the sucker rod through the rod passage tube 3. Rotating the two threaded rods 42 moves the second fixing seat 43 towards the sucker rod. The damping component 44, telescopic rod 45, clamping plate 46, and spring 47 further secure the sucker rod, resulting in greater stability. Oil can enter the oil passage 5 through the through groove 9 and overflow through the connecting groove 6. The filter basket 7 helps prevent fine sand from floating with the oil. This solves the technical problems of existing sucker rod centralizers having poor fixation of the sucker rod, which could cause the sucker rod to detach during oil extraction, and the severe wear between the sucker rod and the centralizer caused by fine sand as the sucker rod moves upward, affecting its use.

[0035] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the scope of protection of this utility model.

Claims

1. A centralizer for oil well sucker rods, comprising a centralizer body (1) and a reinforcement assembly (4), characterized in that, The middle of the centralizer body (1) is fixedly installed with a through rod pipe (3), the centralizer body (1) and the through rod pipe (3) are provided with an oil passing groove (5) in the middle, the inner wall of the through rod pipe (3) is fixedly installed with a spring ring pad (8), the outer wall of the through rod pipe (3) and close to the top is provided with a connecting groove (6), the inside of the oil passing groove (5) and close to the connecting groove (6) is fixedly installed with a filter basket (7), the both sides of the through rod pipe (3) and close to the bottom side are symmetrically provided with a through groove (9), and the inside of the centralizer body (1) and the top and bottom are symmetrically provided with a reinforcing assembly (4).

2. A centralizer for use in oil well sucker rods as defined in claim 1, characterized in that, The reinforcing assembly (4) comprises a first fixed seat (41), the inside of the centralizer body (1) and one side of the top and bottom are fixedly installed with a first fixed seat (41), the inside of the centralizer body (1) and close to the corresponding first fixed seat (41) are threadedly connected with a threaded rod (42), the side of the threaded rod (42) close to the first fixed seat (41) is rotatably connected with a second fixed seat (43), the side of the first fixed seat (41) and the second fixed seat (43) close to each other is fixedly installed with a damping piece (44), the side of the first fixed seat (41) and the second fixed seat (43) close to each other and located on both sides of the damping piece (44) is fixedly installed with an extension rod (45), one side of the damping piece (44) and the extension rod (45) is connected through a clamping plate (46), the outside of the damping piece (44) is sleeved with a spring (47), and the both ends of one of the springs (47) are fixedly connected with the first fixed seat (41) and the clamping plate (46), and the both ends of the other spring (47) are fixedly connected with the second fixed seat (43) and the clamping plate (46).

3. A centralizer for use in oil well sucker rods as defined in claim 2, characterized in that, The end of the second fixed seat (43) is fixedly installed with a limiting rod (48), the inside of the centralizer body (1) and close to the limiting rod (48) is provided with a limiting groove (49), the limiting rod (48) extends into the limiting groove (49) and is slidably connected with the limiting groove (49), and the end of the threaded rod (42) away from the second fixed seat (43) is fixedly installed with a rotating block (410), the outside of the centralizer body (1) and close to the threaded rod (42) is provided with an avoiding groove (411), and the rotating block (410) extends into the avoiding groove (411) and is rotatably connected.

4. A centralizer for use in oil well sucker rods as defined in claim 1, characterized in that, The top wall and the bottom wall of the oil passing groove (5) are provided as symmetrical inclined surfaces.

5. A centralizer for use in oil well sucker rods as defined in claim 1, characterized in that, The outside of the centralizer body (1) is fixedly installed with a sleeve (2), and the outside of the sleeve (2) is circumferentially rotatably connected with a ball (21).

6. A centralizer for use in oil well sucker rods as defined in claim 1, characterized in that, The spring ring pad (8) is made of elastic material.

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