Oil extraction device for oil exploitation

Abstract

The utility model discloses an oil pumping device for oil exploitation, and aims to solve the problems of friction and abrasion between a sucker rod and an oil pipe. The device comprises a sucker rod and a centralizing cylinder installed on the sucker rod, the centralizing cylinder is provided with a plurality of through grooves and elastic plates, the centralizing effect is achieved through the design of the elastic plates, and the stability of the sucker rod is ensured. The elastic plate is provided with the roller grooves, each roller groove is internally provided with two rolling shafts, the rolling shafts are connected with the rollers, and during rotation, friction is converted from sliding friction into rolling friction, so that the friction coefficient is reduced, and abrasion is reduced. The adaptability of the two ends of the centralizing cylinder is enhanced through the extending grooves and the staggered design, and it is ensured that the centralizing cylinder can stably run in an oil pipe. And a plurality of mounting ribs are arranged on the periphery of the sucker rod, so that the centering cylinder is stably mounted without influencing the rotation of the roller. The device can effectively reduce friction, prolong the service life of an oil pipe and a sucker rod, and improve the production efficiency of an oil well.

Description

Technical Field

[0001] This utility model relates to an oil extraction pumping device, belonging to the field of oil extraction. Background Technology

[0002] In rod pump oil production, the sucker rod reciprocates inside the tubing. Wear is inevitable during this relative motion, especially in directional and deviated wells, where the sucker rod is more prone to bending and deformation within the tubing. Friction between the sucker rod and the tubing wall causes wear and damage to either the tubing or the sucker rod. In severe cases, the sucker rod may break off and become difficult to retrieve once inside the tubing, impacting production efficiency. Therefore, a centralizer is connected to the sucker rod. This centralizer must be wear-resistant and corrosion-resistant. It contacts the inner wall of the tubing, serving to centralize the sucker rod and protect both the tubing and the sucker rod, thus extending the well's production cycle.

[0003] Currently, commonly used sucker rod centralizers mainly include roller centralizers, nylon centralizers, and bidirectional protective couplings. Although roller centralizers can convert sliding friction between the tubing and rods into rolling friction, reducing the coefficient of friction, the rollers in roller centralizers are prone to getting stuck on the fixing pins, resulting in inflexible roller rotation. Utility Model Content

[0004] The purpose of this invention is to provide an oil extraction pumping device that can effectively solve the above-mentioned problems.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] The invention includes a sucker rod and a centralizer mounted on the sucker rod, the centralizer including a centralizer cylinder;

[0007] The straightening cylinder has multiple through grooves arranged around its circumference, penetrating both the inside and outside of the cylinder. Two adjacent through grooves that are far apart make the straightening cylinder form an elastic plate. The elastic plate is provided with several roller grooves, and each roller groove is provided with two rollers. Rollers are keyed to the rollers.

[0008] Furthermore, the two ends of the two through slots that are far apart are provided with extension slots, and the two extension slots extend equidistantly in opposite directions.

[0009] Furthermore, the elastic plate is provided with two mounting plates, the side of the mounting plate is flush with the groove surface of the roller groove, and the roller shaft is disposed on the mounting plate.

[0010] Furthermore: the centralizing cylinder is composed of two centralizing cylinder bodies arranged along the axis of the sucker rod, and the two centralizing cylinder bodies are designed as a single unit.

[0011] Furthermore, the elastic plates formed by the straightening cylinder bodies at both ends are arranged in an alternating manner.

[0012] Furthermore, the sucker rod is provided with a plurality of mounting ribs on its outer periphery, the mounting ribs are fixed to the inner wall of the straightening cylinder, and the fixing position of the mounting ribs avoids the elastic plate.

[0013] The beneficial effects are:

[0014] Elastic plate structure design: By setting through grooves on the centralizing cylinder, the centralizing cylinder has a certain degree of elasticity, which can better adapt to the shape of the inner wall of the tubing, reduce the increase of local pressure caused by well deviation and well curvature, and improve the centralizing effect.

[0015] Two-stage staggered centralizing cylinder design: Two centralizing cylinders are set along the axial direction and are staggered, so that the centralizing cylinders can be evenly stressed during the reciprocating motion of the sucker rod, avoiding wear caused by single-point stress and improving the stability of oil well production.

[0016] Installation rib structure: Multiple installation ribs are set around the outside of the sucker rod, and are reasonably avoided in the area of ​​the elastic plate to ensure that the straightening cylinder is installed firmly, while avoiding interference with the movement of the rollers and improving overall durability. Attached Figure Description

[0017] For ease of explanation, this utility model is described in detail below with reference to the specific embodiments and accompanying drawings.

[0018] Figure 1 This is a cross-sectional view of the present invention;

[0019] Figure 2 This is a drawing of the straightening cylinder part of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Sucker rod; 2. Straightening cylinder; 3. Through groove; 4. Elastic plate; 5. Roller groove; 6. Roller; 7. Roller; 8. Extension groove; 9. Mounting plate; 10. Mounting rib. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms “first,” “second,” “third,” etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0025] Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] See Figure 1 This is one embodiment of an oil extraction pumping device according to the present invention.

[0027] To address the friction problem between the sucker rod and the inner wall of the tubing in rod pump oil extraction rigs, an improved sucker rod straightening device is provided. Through a rational structural design, the friction between the sucker rod and the tubing can be effectively reduced, wear can be decreased, thereby extending the service life of both the sucker rod and the tubing and improving oil well production efficiency.

[0028] The sucker rod straightening device in this embodiment includes the following main components:

[0029] Sucker rod 1: Used to transmit the pumping power to the depth of the oil well, enabling up-and-down movement during the oil and gas extraction process.

[0030] Centralizer 2: Installed on the sucker rod 1, it serves to stabilize and protect the oil pipe. The inner wall of the centralizer 2 is in contact with the inner wall of the tubing, bearing the pressure and friction from the reciprocating motion of the sucker rod.

[0031] The design features of the centering cylinder 2 include:

[0032] Through grooves 3: Multiple through grooves 3 are evenly arranged on the outer circumference of the straightening cylinder 2. These through grooves 3 pass through the inner and outer walls of the straightening cylinder 2, dividing the straightening cylinder 2 into multiple regions. The distance between each two adjacent through grooves 3 is relatively large, so that the straightening cylinder 2 forms an elastic plate 4 between the two through grooves.

[0033] Elastic plate 4: Elastic plate 4 is the core component of the centralizer. It has a certain degree of elasticity, which can adapt to changes in the shape of the tubing inner wall and reduce pressure changes caused by well deviation or well curvature. This design allows the centralizer to operate stably inside the tubing, while avoiding friction damage to the sucker rod and tubing.

[0034] Roller grooves 5: Multiple roller grooves 5 are evenly arranged on the elastic plate 4, and two rollers 6 are installed in each roller groove 5. The rollers 6 are connected to the rollers 7 by keys. The design of the roller grooves 5 and rollers 7 changes the friction inside the centralizing cylinder from sliding friction to rolling friction when the sucker rod is working, significantly reducing the coefficient of friction and improving the flexibility of movement.

[0035] Extension groove 8: Extension grooves 8 are provided at the ends of the two through grooves 3 that are far apart. The two extension grooves extend equidistantly in opposite directions. The design of the extension grooves allows the elastic plate 4 to deform appropriately under external pressure, adapting to different shapes inside the oil pipe and improving stability and adaptability.

[0036] Mounting plate 9: Mounting plates 9 are provided on both sides of the elastic plate 4. The side of the mounting plate 9 is flush with the groove surface of the roller groove 5. It is used to securely install the roller shaft so that the shaft of the roller 7 can run stably and avoid friction or jamming caused by improper installation.

[0037] Mounting ribs 10: Multiple mounting ribs 10 are provided around the outer periphery of the sucker rod 1, and the mounting ribs 10 are fixed to the inner wall of the centralizing cylinder 2. The positions of these mounting ribs avoid the elastic plate 4, ensuring a stable connection between the sucker rod 1 and the centralizing cylinder 2, and not affecting the normal rotation of the roller 7.

[0038] The working principle of this device is as follows:

[0039] Step 1: Install the sucker rod and centralizer: In the oil well, first install the sucker rod 1 into the tubing. Then, fix the centralizer 2 onto the sucker rod 1. The centralizer 2 is designed to ensure contact with the inner wall of the tubing and is stably fixed to the sucker rod by the mounting rib 10. This ensures that the centralizer 2 can slide smoothly within the tubing during the reciprocating motion of the sucker rod 1.

[0040] Step 2: Sucker rod operation: When the rod pump system is working, the sucker rod 1 reciprocates inside the tubing, and the centralizer 2 moves along with the sucker rod 1. Since the outer wall of the centralizer 2 is in contact with the inner wall of the tubing, it can maintain the vertical position of the sucker rod, prevent the sucker rod from bending or deflecting, and reduce friction.

[0041] Step 3: Friction Conversion: When the sucker rod 1 begins to move, the roller 7 begins to rotate in the roller groove 5. Through the rolling of the roller 7, the friction force changes from sliding friction to rolling friction, significantly reducing the coefficient of friction. The roller 6 is connected to the roller 7 by a key, ensuring the smooth rotation of the roller 7. Due to the movement of the roller, the consumption of friction force is further reduced, thereby reducing the wear between the sucker rod and the inner wall of the tubing.

[0042] Step 4: Elastic Adaptation: The elastic plate 4 enables the centralizer to provide good centralizing effect within the tubing. The design of the centralizer 2 allows it to adapt to changes in tubing shape, especially in cases of well deviation or curvature. The centralizer effectively adapts to the tubing's inner wall through the deformation of the elastic plate 4, ensuring stable operation of the sucker rod within the well.

[0043] This embodiment uses a roller groove and roller design to transform friction from sliding friction to rolling friction, which greatly reduces the coefficient of friction and reduces wear.

[0044] Improved stability: The elastic plate structure of the centering cylinder can adapt to changes in the shape of the tubing, ensuring the verticality of the sucker rod and preventing it from bending or tilting.

[0045] Enhanced durability: The roller design prevents jamming, improves the roller's rotational flexibility, and extends the service life of the centralizing cylinder and sucker rod.

[0046] Reasonable structure: The design of two staggered straightening cylinders ensures that the elastic plate is subjected to uniform force, reduces local wear, and improves the overall stability of the sucker rod straightening device.

[0047] After using this centralizing device, the production efficiency of the oil well was significantly improved. Due to the reduction in friction, the wear of the sucker rod and tubing was greatly reduced, and the production cycle of the oil well was extended. Especially in directional or deviated wells, the design of the sucker rod centralizing device allows the sucker rod to move more smoothly, reducing downtime and increasing overall production.

[0048] This embodiment utilizes nylon rollers and a higher-strength elastic plate material, enabling the device to operate stably under higher temperature and pressure environments, making it suitable for special downhole environments such as high-temperature oil wells or deep wells. Optimization in material selection improves the applicability and durability of the centralizing device.

[0049] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An oil extraction pumping device, characterized in that: The device includes a sucker rod (1) and a stabilizer mounted on the sucker rod (1). The stabilizer includes a stabilizer cylinder (2). The stabilizer cylinder (2) has multiple through grooves (3) arranged around its circumference, penetrating both the inside and outside of the stabilizer cylinder (2). Two adjacent through grooves (3) that are far apart form an elastic plate (4) on the stabilizer cylinder (2). The elastic plate (4) is provided with several roller grooves (5). Each roller groove (5) is provided with two rollers (6). Rollers (7) are keyed to the rollers (6).

2. The oil extraction pumping device according to claim 1, characterized in that: The two through slots (3) that are far apart are provided with extension slots (8), and the two extension slots (8) extend at equal intervals in opposite directions.

3. The oil extraction pumping device according to claim 2, characterized in that: Two mounting plates (9) are provided on the elastic plate (4). The side of the mounting plate (9) is flush with the groove surface of the roller groove (5), and the roller (7) shaft is provided on the mounting plate (9).

4. The oil extraction pumping device according to claim 3, characterized in that: The centralizer consists of two centralizing cylinders (2) arranged along the axis of the sucker rod (1), and the two centralizing cylinders (2) are integrally formed.

5. The oil extraction pumping device according to claim 4, characterized in that: The elastic plates (4) formed by the straightening cylinders (2) at both ends are staggered.

6. The oil extraction pumping apparatus according to claim 5, characterized in that: The sucker rod (1) is provided with a plurality of mounting ribs (10) on its outer periphery. The mounting ribs (10) are fixed to the inner wall of the straightening cylinder (2), and the fixed position of the mounting ribs (10) avoids the elastic plate (4).

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