Sucker rod centralizer

Abstract

The utility model relates to the field of oil extraction equipment, in particular to a sucker rod centralizer which aims at solving the technical problem that an existing centralizer cannot adapt to oil pipes of different specifications. The sucker rod centralizer comprises a fixing ring, the movable ring and the fixed ring are coaxially arranged; the plurality of groups of righting mechanisms are distributed around the axis of the movable ring at intervals; the righting mechanism comprises two supporting rods and a sliding assembly, one ends of the two supporting rods are hinged to the sliding assembly, and the other ends of the two supporting rods are hinged to the side wall of the fixed ring and the side wall of the movable ring respectively. The driving mechanism is arranged on the fixed ring and is in transmission connection with the movable ring so as to drive the movable ring to move in the axial direction of the movable ring. According to the sucker rod centralizer, the movable ring can be separated from or get close to the fixed ring in the length direction of the sucker rod through the driving mechanism, so that the angle between the upper supporting rod and the lower supporting rod is adjusted, the position of the sliding assembly is adjusted, the sliding assembly can adapt to oil pipes with different inner diameters, and the adaptability is improved.

Description

Technical Field

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

[0002] The sucker rod is a slender rod used in pumping wells. It connects to the polished rod at the top and the pump at the bottom, transmitting power. The sucker rod centralizer is a downhole tool used to prevent eccentric wear in pumping wells. It is suitable for wells with eccentric wear, especially wells and directional wells where eccentric wear occurs above the neutral point. Below the neutral point, the rod stabilizer, in conjunction with the nylon centralizer on the rod body, provides even better protection against eccentric wear.

[0003] Currently, most existing sucker rod centralizers are simple, similar to the inner casing, fixed to the outer wall of the sucker rod. The centralizer contacts the inner wall of the tubing, preventing direct friction between the sucker rod and the tubing. However, in actual use, due to the fixed outer diameter of the centralizer, it cannot adapt to tubing with different inner diameters. This causes the sucker rod and centralizer to easily wobble within the tubing, causing impact between the centralizer and tubing, leading to wear and shortening the service life. Utility Model Content

[0004] The utility model aims to provide a sucker rod centralizer to solve the technical problem that the existing centralizer cannot adapt to oil pipes of different specifications.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0006] The sucker rod centralizer provided by the utility model comprises: a fixing ring;

[0007] A movable ring, coaxially arranged with the fixed ring;

[0008] A plurality of groups of righting mechanisms are spaced apart around the axis of the movable ring;

[0009] The straightening mechanism includes a support rod and a sliding assembly, wherein two support rods are provided, one end of each of the support rods is hinged to the sliding assembly, and the other end is hinged to the side walls of the fixed ring and the movable ring respectively;

[0010] The driving mechanism is arranged on the fixed ring and is in transmission connection with the movable ring to drive the movable ring to move along its own axial direction.

[0011] Furthermore, the sliding assembly includes a fixed block, and both ends of the fixed block are provided with a first notch;

[0012] One end of the two support rods is respectively inserted into the two first notches, and both are hinged to the fixing block through a first rotating shaft.

[0013] Furthermore, a second notch is provided on the side wall of the fixed ring, and a third notch is provided on the side wall of the movable ring;

[0014] The other ends of the two support rods are respectively inserted into the second notch and the third notch, and are respectively hinged to the fixed ring and the movable ring through the second rotating shaft;

[0015] The two support rods can be located on the same straight line extending axially along the movable ring under a rotating working condition.

[0016] Furthermore, the sliding assembly further includes a roller, which is arranged on the fixed block, with its axis being perpendicular to the axis of the movable ring and its side surface protruding from the fixed block.

[0017] Furthermore, the roller is rotatably connected to the fixed block and can rotate around its own axis.

[0018] Furthermore, the support rod is a telescopic rod, and enables the sliding assembly to have a tendency to move away from the movable ring.

[0019] Furthermore, the support rod includes a first rod body, a second rod body and a damping spring;

[0020] A slot is provided in the first rod body, and the slot extends in a straight line from one end to the other end of the first rod body;

[0021] An insertion rod is fixed to one end of the second rod body, and the insertion rod is inserted into the slot;

[0022] The damping spring is located in the slot, and one end of the damping spring is connected to the first rod body, and the other end is connected to the insertion rod.

[0023] Furthermore, the driving mechanism includes a screw, which extends along the axial direction of the movable ring, passes through the side wall of the movable ring, and is threadedly connected to the movable ring;

[0024] One end of the screw is rotatably connected to the side wall of the fixing ring.

[0025] Furthermore, the other end of the screw is fixedly connected to a rotating block, and the rotating block is used to cooperate with a wrench.

[0026] Furthermore, the driving mechanism also includes a limiting rod, which is distributed parallel to the screw rod and is also penetrated through the side wall of the movable ring, and one end of the limiting rod is fixedly connected to the side wall of the fixed ring.

[0027] In summary of the above technical solutions, the technical effects that can be achieved by the sucker rod centralizer provided by the utility model are:

[0028] In the sucker rod centralizer, the driving mechanism drives the movable ring to move along its own axial direction. During the movement of the movable ring, the angle between the two support rods hinged to the same sliding assembly is adjusted to adjust the position of the sliding assembly.

[0029] During specific application, first, the fixed ring and the movable ring are installed on the sucker rod, and the fixed ring is fixedly connected to the sucker rod. Then, the movable ring is driven up and down by the driving mechanism to adjust the angle between the upper and lower support rods, thereby adjusting the position of the sliding assembly so that the sliding assembly adapts to the inner diameter of the oil pipe; then the sucker rod is sent into the oil pipe. During the sucker rod lowering process, multiple sliding assemblies fit the inner wall of the oil pipe, which plays a role in straightening the sucker rod, thereby making the sucker rod have high lifting stability in the oil pipe.

[0030] It can be seen that compared with the existing technology, the sucker rod centralizer can use the driving mechanism to separate or move the movable ring from or closer to the fixed ring along the length direction of the sucker rod, thereby adjusting the angle between the upper and lower support rods, and then adjusting the position of the sliding assembly, so that the sliding assembly can adapt to oil pipes with different inner diameters, thereby improving adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic structural diagram of a sucker rod centralizer provided in an embodiment of the utility model;

[0033] Figure 2 A schematic structural diagram of a sliding assembly provided in an embodiment of the present utility model;

[0034] Figure 3 A half-section view of a support rod provided in an embodiment of the present utility model.

[0035] Icon: 1-Fixed ring; 2-Movable ring;

[0036] 3-support rod; 31-first rod; 32-second rod; 33-damping spring; 34-insertion rod;

[0037] 4-sliding assembly; 41-fixed block; 42-roller;

[0038] 5-driving mechanism; 51-screw; 52-rotating block; 53-limiting rod. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0041] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0042] Most existing sucker rod centralizers are simple, similar to the inner casing, fixed to the outer wall of the sucker rod. The centralizer contacts the inner wall of the tubing, preventing direct friction between the sucker rod and the tubing. However, in actual use, the centralizer's fixed outer diameter makes it difficult to adapt to tubing with varying inner diameters. This causes the sucker rod and centralizer to easily wobble within the tubing, causing impact between the centralizer and tubing, leading to wear and shortening its service life.

[0043] In view of this, the utility model provides a sucker rod centralizer, comprising a fixed ring 1, a movable ring 2, a centralizing mechanism and a driving mechanism 5; the movable ring 2 is coaxially arranged with the fixed ring 1; the centralizing mechanism is provided with multiple groups, and the multiple groups of centralizing mechanisms are spaced apart around the axis of the movable ring 2; the centralizing mechanism comprises a support rod 3 and a sliding assembly 4, wherein two support rods 3 are provided, one end of the two support rods 3 is hinged to the sliding assembly 4, and the other end is respectively hinged to the side walls of the fixed ring 1 and the movable ring 2; the driving mechanism 5 is provided on the fixed ring 1, and is transmission-connected to the movable ring 2 to drive the movable ring 2 to move along its own axial direction.

[0044] In the sucker rod centralizer, the driving mechanism 5 drives the movable ring 2 to move along its own axial direction. During the movement of the movable ring 2, the angle between the two support rods 3 hinged to the same sliding assembly 4 is adjusted to adjust the position of the sliding assembly 4.

[0045] During specific application, first, the fixed ring 1 and the movable ring 2 are installed on the sucker rod, and the fixed ring 1 is fixedly connected to the sucker rod. Then, the movable ring 2 is driven up and down by the driving mechanism 5, and the angle between the upper and lower support rods 3 is adjusted, thereby adjusting the position of the sliding component 4 so that the sliding component 4 adapts to the inner diameter of the oil pipe; then the sucker rod is sent into the oil pipe. During the process of lowering the sucker rod, multiple sliding components 4 are attached to the inner wall of the oil pipe, which plays a role in straightening the sucker rod, thereby making the sucker rod have high lifting stability in the oil pipe.

[0046] It can be seen that compared with the existing technology, the sucker rod centralizer can separate or approach the movable ring 2 from the fixed ring 1 along the length direction of the sucker rod through the driving mechanism 5, thereby adjusting the angle between the upper and lower support rods 3, and then adjusting the position of the sliding assembly 4, so that the sliding assembly 4 can adapt to oil pipes with different inner diameters, thereby improving adaptability.

[0047] The following combination Figures 1 to 3 The structure and shape of the sucker rod centralizer provided in this embodiment are described in detail:

[0048] Regarding the driving mechanism 5, specifically:

[0049] refer to Figure 1 The driving mechanism 5 includes a screw 51, which extends along the axial direction of the movable ring 2, penetrates the side wall of the movable ring 2, and is threadedly connected to the movable ring 2; the bottom end of the screw 51 is rotatably connected to the side wall of the fixed ring 1.

[0050] Specifically, such as Figure 1 As shown, the driving mechanism 5 also includes a limiting rod 53, which is distributed parallel to the screw 51, is also passed through the side wall of the movable ring 2, and its bottom end is fixedly connected to the side wall of the fixed ring 1; optionally, two limiting rods 53 are provided, and the two limiting rods 53 and the screw 51 are distributed in a triangle; the other end of the screw 51 is fixedly connected to a rotating block 52, and the rotating block 52 is used to cooperate with a wrench. Optionally, the rotating block 52 is an external hexagonal structure, suitable for an external hexagonal wrench, or an internal hexagonal structure, correspondingly, suitable for an internal hexagonal wrench.

[0051] During operation, turning the rotating block 52 with a wrench causes the screw 51 to rotate about its axis, causing the movable ring 2 to rise and fall on the limiting rod 53, adjusting the angle between the upper and lower support rods 3 and, consequently, the position of the sliding assembly 4, allowing the sucker rod centralizer to adapt to the inner diameter of the oil pipe. The provision of the limiting rod 53 improves the stability of the movable ring 2 during its rise and fall.

[0052] Regarding the righting mechanism, specifically:

[0053] refer to Figure 2The top and bottom of the fixed block 41 are each provided with a first notch. A first rotating shaft is rotatably mounted on the inner wall of the first notch, and one end of the support rod 3 is fixedly connected to the first rotating shaft. A groove is provided in the middle of the fixed block 41, and a roller 42 is rotatably mounted in the groove. A second notch is provided in the side wall of the fixed ring 1, and a third notch is provided in the side wall of the movable ring 2. The other ends of the two support rods 3 are respectively inserted into the second and third notches and are hinged to the fixed ring 1 and movable ring 2 via the second rotating shaft.

[0054] In actual use, combined with Figure 1 As shown, the roller 42 is fitted to the inner wall of the oil pipe, so that the rolling property of the roller 42 allows the sucker rod centralizer to slide up and down along the inner wall of the oil pipe; when not in use, the screw 51 is rotated to separate the movable ring 2 from the fixed ring 1, so that the two support rods 3 are in a vertical state, and the fixed block 41 is also in a vertical state. In this way, the entire centralizing mechanism is accommodated in the accommodating space formed between the second notch and the third notch, so that when the sucker rod centralizer is not in use, the sliding assembly 4 can be effectively protected to avoid damage due to bumps or impacts.

[0055] Continue with the above, reference Figure 3 The support rod 3 includes a first rod body 31, a second rod body 32 and a damping spring 33; a slot is provided in the first rod body 31, and the slot extends in a straight line from one end of the first rod body 31 to the other end, and the other end of the first rod body 31 is fixedly connected to the first rotating shaft; an insertion rod 34 is fixed to one end of the second rod body 32, and the other end is fixedly connected to the second rotating shaft; the insertion rod 34 is inserted in the slot; the damping spring 33 is in the slot, and one end of it is connected to the first rod body 31, and the other end is connected to the insertion rod 34.

[0056] In actual use, combined with Figure 1 As shown, the roller 42 rolls along the inner wall of the oil pipe. When the sucker rod deviates slightly, the corresponding support rod 3 is squeezed, further compressing the damping spring 33. In this way, the damping spring 33 buffers the impact force generated by the deviation, thereby protecting the sucker rod centralizer and extending the service life of the sucker rod centralizer.

[0057] The working process of the sucker rod centralizer provided in this embodiment is as follows:

[0058] During actual use, first, the fixed ring 1 and the movable ring 2 are mounted on the sucker rod, and the fixed ring 1 is fixedly connected to the sucker rod. Before the sucker rod enters the oil pipe, the screw 51 is rotated to drive the movable ring 2 to be raised and lowered, thereby adjusting the angle between the upper and lower support rods 3, and then adjusting the position of the sliding assembly 4 so that the sliding assembly 4 adapts to the inner diameter of the oil pipe; then the sucker rod is sent into the oil pipe. During the sucker rod lowering process, the sucker rod centralizer uses the roller 42 to fit the inner wall of the oil pipe, and slides up and down along the inner wall of the oil pipe through the rolling performance of the roller 42. In this way, the sucker rod is centralized, ensuring the stability of the sucker rod in the oil pipe.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sucker rod centralizer, characterized in that: include: A fixed ring (1); a movable ring (2) coaxially arranged with the fixed ring (1); a plurality of straightening mechanisms spaced apart around the axis of the movable ring (2); the straightening mechanism comprising a support rod (3) and a sliding assembly (4), wherein two support rods (3) are provided, one end of each of the two support rods (3) being hinged to the sliding assembly (4), and the other end being hinged to the side walls of the fixed ring (1) and the movable ring (2), respectively; a driving mechanism (5) being arranged on the fixed ring (1) and being in transmission connection with the movable ring (2) to drive the movable ring (2) to move along its own axial direction.

2. The sucker rod centralizer according to claim 1, characterized in that: The sliding assembly (4) comprises a fixing block (41), and both ends of the fixing block (41) are provided with a first notch; One end of the two support rods (3) is respectively inserted into the two first notches, and both are hinged to the fixed block (41) via a first rotating shaft.

3. The sucker rod centralizer according to claim 2, characterized in that: A second notch is provided on the side wall of the fixed ring (1), and a third notch is provided on the side wall of the movable ring (2); The other ends of the two support rods (3) are respectively inserted into the second notch and the third notch, and are respectively hinged to the fixed ring (1) and the movable ring (2) via a second rotating shaft; The two support rods (3) can be located on the same straight line extending axially along the movable ring (2) under a rotating working condition.

4. The sucker rod centralizer according to claim 2, characterized in that: The sliding assembly (4) further comprises a roller (42), which is arranged on the fixed block (41), with its axis perpendicular to the axis of the movable ring (2) and its side surface protruding from the fixed block (41).

5. The sucker rod centralizer according to claim 4, characterized in that: The roller (42) is rotatably connected to the fixed block (41) and can rotate around its own axis.

6. The sucker rod centralizer according to claim 1, characterized in that: The support rod (3) is a telescopic rod, and enables the sliding component (4) to have a tendency to move away from the movable ring (2).

7. The sucker rod centralizer according to claim 6, characterized in that: The support rod (3) comprises a first rod body (31), a second rod body (32) and a damping spring (33); A slot is provided in the first rod (31), and the slot extends in a straight line from one end of the first rod (31) to the other end; An insertion rod (34) is fixed to one end of the second rod body (32), and the insertion rod (34) is inserted into the slot; The damping spring (33) is located in the slot, and one end of the damping spring is connected to the first rod (31), and the other end is connected to the insertion rod (34).

8. The sucker rod centralizer according to claim 1, characterized in that: The driving mechanism (5) comprises a screw (51), the screw (51) extending along the axial direction of the movable ring (2), penetrating the side wall of the movable ring (2), and being threadedly connected to the movable ring (2); One end of the screw rod (51) is rotatably connected to the side wall of the fixing ring (1).

9. The sucker rod centralizer according to claim 8, characterized in that: The other end of the screw rod (51) is fixedly connected to a rotating block (52), and the rotating block (52) is used to cooperate with a wrench.

10. The sucker rod centralizer according to claim 8, characterized in that: The driving mechanism (5) further comprises a limiting rod (53), which is arranged in parallel with the screw rod (51), is also passed through the side wall of the movable ring (2), and one end of the limiting rod (53) is fixedly connected to the side wall of the fixed ring (1).

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