Anti-drag sucker rod centralizer

Abstract

The utility model discloses a resistance reduction type sucker rod centralizer which comprises a sucker rod body and a centralizer casing pipe shaping shell, the centralizer casing pipe shaping shell wraps the sucker rod body, an inclined spiral centralizing and positioning spiral groove is formed in the outer portion of the sucker rod body, and a resistance reduction inner sleeve is arranged in the sucker rod body. The resistance reduction type sucker rod centralizer comprises a sucker rod body and a resistance reduction inner sleeve arranged on the sucker rod body, the resistance reduction inner sleeve comprises a nitrile rubber damping layer, the nitrile rubber damping layer and the inner wall of the sucker rod body are bonded and formed through a flame-retardant binder, and a foamed aluminum energy absorption layer is arranged on the other side of the nitrile rubber damping layer. The shock absorption and righting functions are provided for shaking of the sucker rod, the duration time of the extrusion action between the sucker rod and the inner wall of the outer sleeve is prolonged, and therefore the extrusion pressure is reduced, the structural intact degree of the oil pumping device is effectively protected, and the service life of the oil pumping device is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of oil pumping units, specifically a drag-reducing sucker rod centralizer. Background Technology

[0002] The sucker rod is one of the components of a pumping unit well. It has a slender overall structure, connecting the polished rod at the top and the pump at the bottom, primarily serving to transmit power. On the outside of the sucker rod, there is a component to prevent uneven wear on the pumping well; this component is called the sucker rod centralizer.

[0003] Sucker rod centralizers are suitable for oil wells with uneven wear, especially for wells and directional wells where wear occurs above the sucker rod neutral point. Below the neutral point, they work even better with the nylon centralizer on the sucker rod body to prevent uneven wear. Currently, there are many types of sucker rods on the market. Besides sharing the common feature of preventing uneven wear, they also vary depending on different operating conditions and needs. For example, Chinese patent application number CN202411448755.8 describes a sucker rod centralizer including a centralizing sleeve, a short section, a compensating sleeve, and an elastic sleeve. Two sets of compensating sleeves have connecting rods integrally formed at their top and bottom, and one end of each connecting rod has an integrally formed rack. This patent is a typical sucker rod centralizer device. However, in practical applications, its drag reduction and shock absorption effects are poor. Under the combined pressure of the sucker rod and the inner wall of the outer sleeve, it is prone to breakage and damage, significantly reducing its service life. Summary of the Invention

[0004] The purpose of this invention is to provide a drag-reducing sucker rod centralizer to solve the problems mentioned in the background art, such as poor drag reduction and shock absorption effects of existing sucker rod centralizers, easy breakage and damage under the combined squeezing action of the sucker rod and the inner wall of the outer sleeve, which greatly reduces the service life.

[0005] The technical solution of this utility model is implemented as follows: a drag-reducing sucker rod centralizer includes a sucker rod body and a centralizer sleeve shaping shell. The centralizer sleeve shaping shell is wrapped around the outside of the sucker rod body. An inclined spiral centralizing and positioning groove is formed on the outside of the sucker rod body. A drag-reducing inner sleeve is provided inside the sucker rod body.

[0006] The drag-reducing inner sleeve includes a nitrile rubber damping layer, which is bonded to the inner wall of the sucker rod body by a flame-retardant adhesive. A foamed aluminum energy-absorbing layer is provided on the other side of the nitrile rubber damping layer, a heat insulation layer is provided on the other side of the foamed aluminum energy-absorbing layer, and an inner structural layer is provided on the other side of the heat insulation layer.

[0007] Preferably, the sucker rod body is fixedly connected to the drag-reducing inner sleeve.

[0008] Preferably, the inner wall of the centralizer sleeve is provided with a fitting protrusion, and the sucker rod body and the fitting protrusion are integrally formed.

[0009] Preferably, the nitrile rubber damping layer, the aluminum foam energy-absorbing layer, and the heat insulation layer are reinforced in series through an inner structural layer.

[0010] Preferably, the reinforcing fiber is made of carbon fiber.

[0011] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0012] This drag-reducing sucker rod centralizer uses multiple layers of drag-reducing and shock-absorbing pads to dampen and straighten the sucker rod, extending the duration of the squeezing action between the sucker rod and the inner wall of the outer sleeve, thereby reducing the squeezing pressure, effectively protecting the structural integrity of the invention, and improving its service life. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is the front view of the present invention.

[0015] Figure 2 This is an internal structural view of the centralizer sleeve of this utility model.

[0016] Figure 3 for Figure 2 A magnified view of area A.

[0017] The components include: 1. Sucker rod body; 2. Centralizer sleeve housing; 3. Centralizer positioning groove; 4. Fitting synapse; 5. Drag-reducing inner sleeve; 501. Flame-retardant adhesive; 502. Nitrile rubber damping layer; 503. Aluminum foam energy-absorbing layer; 504. Heat insulation layer; 505. Inner structural layer; 506. Reinforcing fiber filaments. Detailed Implementation

[0018] 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.

[0019] See Figures 1-3 A drag-reducing sucker rod centralizer includes a sucker rod body 1 and a centralizer sleeve shaping shell 2. The centralizer sleeve shaping shell 2 is wrapped around the outside of the sucker rod body 1. An inclined spiral centralizing positioning groove 3 is formed on the outside of the sucker rod body 1. A drag-reducing inner sleeve 5 is provided inside the sucker rod body 1.

[0020] The drag-reducing inner sleeve 5 includes a nitrile rubber damping layer 502, which is bonded to the inner wall of the sucker rod body 1 by a flame-retardant adhesive 501. A foamed aluminum energy-absorbing layer 503 is provided on the other side of the nitrile rubber damping layer 502, a heat insulation layer 504 is provided on the other side of the foamed aluminum energy-absorbing layer 503, and an inner structural layer 505 is provided on the other side of the heat insulation layer 504.

[0021] See Figure 2 The sucker rod body 1 is fixedly connected to the drag-reducing inner sleeve 5. This arrangement can ensure the structural strength between the sucker rod body 1 and the drag-reducing inner sleeve 5, and prevent the sucker rod body 1 and the drag-reducing inner sleeve 5 from cracking under the squeezing action of the sucker rod body 1 and the inner wall of the outer sleeve.

[0022] See Figure 2 The inner wall of the centralizer casing 2 is provided with a contacting protrusion 4. The sucker rod body 1 and the contacting protrusion 4 are integrally formed. This arrangement can increase the contact area between the sucker rod body 1 and the inner wall of the centralizer casing 2 through the contacting protrusion 4, thereby improving the friction and stability of the contact between the sucker rod body 1 and the centralizer casing 2 and preventing slippage.

[0023] See Figure 3 The nitrile rubber damping layer 502, the aluminum foam energy-absorbing layer 503, and the heat insulation layer 504 are reinforced by connecting reinforcing fiber filaments 506. This arrangement can utilize the reinforcing fiber filaments 506 to improve the structural strength and stability between the nitrile rubber damping layer 502, the aluminum foam energy-absorbing layer 503, and the heat insulation layer 504, thereby further improving the structural strength of this device.

[0024] See Figure 3 The 506 reinforcing fiber uses carbon fiber, which is a high-strength, high-modulus fiber with a strength typically exceeding 3500 MPa and a modulus of approximately 230 GPa. It also possesses excellent corrosion resistance and high-temperature resistance.

[0025] Working principle: When using this device, the centralizer sleeve 2 is wrapped around the outside of the sucker rod body 1. The centralizer sleeve 2 isolates the sucker rod body 1 from the inner wall of the outer sleeve. The centralizer sleeve 2 provides centralization and anti-wear protection for the sucker rod body 1. At the same time, when the sucker rod body 1 shakes, the centralizer sleeve 2 is squeezed by the sucker rod body 1 and the inner wall of the outer sleeve. At this time, the nitrile rubber damping layer 502 and the foamed aluminum energy-absorbing layer 503 can play a buffering and shock-absorbing role, absorbing the energy of the compression and prolonging the duration of the compression action between the sucker rod body 1 and the inner wall of the outer sleeve, thereby reducing the compression pressure and effectively protecting the structural integrity of the centralizer sleeve 2. It prevents the centralizer sleeve 2 from cracking or being damaged under the internal and external compression, thus improving the service life of this utility model.

[0026] In this specification, the terms "connection," "installation," "fixing," and "setting" are interpreted broadly. For example, "connection" can mean a fixed connection or an indirect connection via an intermediate component without affecting the relationship between components and the technical effect. It can also mean an integral connection or a partial connection. In such cases, those skilled in the art can understand the specific meaning of the above terms in this utility model or utility model according to the specific circumstances. In this utility model, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing this utility model and its embodiments and are not intended to limit the indicated device, element, or component to having a specific orientation or to be constructed and operated in a specific orientation. Finally, it should be noted that when describing the position of each component and the matching relationship between them, this utility model usually uses one or a pair of components as examples. However, those skilled in the art should understand that such positions and matching relationships also apply to other components / other pairs of components.

[0027] 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 drag-reducing sucker rod centralizer, characterized by: It includes sucker rod body (1) and centralizer sleeve sizing shell (2), the centralizer sleeve sizing shell (2) is wrapped in the outside of the sucker rod body (1), the sucker rod body (1) outside is shaped with the inclined helical centralizer positioning spiral groove (3), the sucker rod body (1) inside is provided with the drag reduction inner sleeve (5); The drag reduction inner sleeve (5) includes but the Qing rubber damping layer (502), the but the Qing rubber damping layer (502) is bonded with the inner wall of the sucker rod body (1) by the fire retardant adhesive (501) and is formed, the other side of but the Qing rubber damping layer (502) is provided with the foam aluminum energy absorption layer (503), the other side of the foam aluminum energy absorption layer (503) is provided with the heat insulation layer (504), the other side of the heat insulation layer (504) is provided with the inner structure layer (505).

2. A drag-reducing sucker rod centralizer according to claim 1, characterized in that: The sucker rod body (1) is fixedly connected with the drag reduction inner sleeve (5).

3. A drag-reducing sucker rod centralizer according to claim 1, characterized in that: The inner wall of the centralizer sleeve sizing shell (2) is provided with the fit synapse (4), and the sucker rod body (1) is integrally formed with the fit synapse (4).

4. A drag-reducing sucker rod centralizer according to claim 1, characterized in that: The but the Qing rubber damping layer (502), the foam aluminum energy absorption layer (503), the heat insulation layer (504) are strengthened by the reinforcing fiber filaments (506) in series.

5. A drag-reducing sucker rod centralizer according to claim 4, characterized in that: The reinforcing fiber filaments (506) adopt carbon fiber filaments.

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