Carbon fiber sucker rod convenient to connect

Abstract

The utility model relates to the technical field of oil and gas exploitation equipment, in particular to a carbon fiber sucker rod convenient to connect, which comprises a rod body, a male joint and a female joint, the rod body is of a round-rod-shaped structure, and the two ends of the rod body are connected with the first cementing part and the second cementing part of the male connector and the female connector in a cementing mode respectively. A second cementing part is arranged on the left side of the female joint, and a sleeving part is arranged on the other side; the sleeving part is of a sleeve-shaped structure, and a threaded hole is axially formed in the sleeving part; the male joint comprises a thread part, a shoulder part and a first cementing part; the threaded part is in threaded connection with the threaded hole of the sleeving part; the outer circumference of the shoulder part is hermetically connected with the inner wall of the sleeving part; and a sealing structure is formed between the two. The male connector and the female connector are arranged at the two ends of the rod body, and connection between sucker rods is achieved in the mode that the male connector is screwed into the female connector. According to the direct connection mode, the dependence on additional coupling accessories in the prior art is abandoned, the field operation process is simplified, and the overall efficiency of oil extraction work is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas extraction equipment, in particular to a carbon fiber sucker rod that is easy to connect. Background Art

[0002] The existing connection method between carbon fiber sucker rods mainly relies on couplings, which have internal threads at both ends, and different sucker rods can be combined as needed.

[0003] However, this connection method has numerous drawbacks. If couplings are not available on-site, the carbon fiber sucker rod cannot be connected, hindering oil production. Using couplings not only increases the number of on-site components, raising costs, but also increases the burden of component management and storage. Furthermore, as an additional connector, couplings require additional steps during installation, reducing efficiency.

[0004] Therefore, a carbon fiber sucker rod that is easy to connect is developed to eliminate the need for couplings and improve work efficiency. Utility Model Content

[0005] The utility model aims to solve the problems existing in the existing carbon fiber sucker rod connection method and provide a carbon fiber sucker rod that is easy to connect. A male joint and a female joint are set at both ends of the rod body, which can be directly connected to each other without the need for additional couplings, simplifying the on-site work process, reducing costs, and improving work efficiency, thereby solving the technical problems in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a carbon fiber sucker rod that is easy to connect, comprising: a rod body, a male connector, and a female connector;

[0007] The rod body is a round rod-shaped structure, and both ends of the rod body are respectively glued to the first glue-bonding part and the second glue-bonding part of the male connector and the female connector;

[0008] The left side of the female connector is provided with a second adhesive binding portion, and the other side is a sleeve portion;

[0009] The sleeve portion is a sleeve-shaped structure with a threaded hole axially opened inside.

[0010] The male connector includes a threaded portion, a shoulder portion, and a first adhesive portion;

[0011] The threaded portion is threadedly connected to the threaded hole of the sleeve portion;

[0012] The shoulder portion is an annular step structure on the rear side of the threaded portion of the male connector, and the outer circumference of the shoulder portion is sealed with the inner wall of the sleeve portion; the sleeve portion and the shoulder portion cooperate to form a sealing structure between the two.

[0013] Furthermore, the first adhesive part and the second adhesive part are circular holes opened on the male connector and the female connector near one end of the rod body; the two ends of the rod body are respectively inserted into the circular holes and glued to the inner walls of the circular holes.

[0014] Furthermore, a protrusion is provided at each end of the rod body; the protrusion protrudes axially outward from the rod body; the corresponding first and second adhesive parts of the male connector and the female connector are also axially provided with grooves that are adapted to the shape of the protrusion and for the protrusion to engage with.

[0015] Furthermore, a buckling cover edge is provided at the end of the female connector sleeve portion; a stepped step is provided at the corresponding end of the male connector shoulder portion; and the two buckle with each other.

[0016] Furthermore, a plurality of sealing grooves are provided on the inner wall of the sleeve portion, and sealing rings are provided in the sealing grooves.

[0017] Furthermore, the rod body, the male connector and the female connector are all made of carbon fiber material.

[0018] Furthermore, a wrench square neck is provided on the outer circumference of the male connector and the female connector.

[0019] Beneficial effects

[0020] This utility model directly provides male and female connectors at both ends of the carbon fiber sucker rod body, and the rods are connected by screwing the male connector into the female connector. This direct connection method eliminates the traditional reliance on additional couplings and allows the rod connection to be successfully completed even when couplings are not available on site. This greatly simplifies the on-site operation process, reduces the time wasted searching for or waiting for couplings, and improves the overall efficiency of oil production.

[0021] The sealed connection between the shoulder portion of the male connector and the inner wall of the sleeve portion of the female connector, as well as the engagement design between the protrusions at both ends of the rod body and the grooves of the male and female connectors, together improve the sealing and stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 This is a cross-sectional view of the connection between the male connector and the female connector of the carbon fiber sucker rod disclosed in the utility model;

[0024] Figure 2 This is a structural diagram of the male and female joints of the carbon fiber sucker rod disclosed in the utility model;

[0025] Figure 3 This is the overall structural diagram of the carbon fiber sucker rod disclosed in the utility model;

[0026] Figure 4 This is a structural diagram of the male joint of the carbon fiber sucker rod disclosed in the utility model;

[0027] Figure 5 This is a structural diagram of the rod body of the carbon fiber sucker rod disclosed in the utility model.

[0028] In the figure: 1. Rod body; 101. Protrusion; 2. Male connector; 201. Threaded portion; 202. Shoulder portion; 203. First adhesive bonding portion; 3. Female connector; 301. Second adhesive bonding portion; 302. Fitting portion; 303. Sealing ring; 4. Square neck of wrench. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 making creative efforts are within the scope of protection of the present invention.

[0030] In order to achieve the above purpose, the present invention provides the following technical solutions: Figure 1-5 As shown, a carbon fiber sucker rod that is easy to connect includes: a rod body 1, a male connector 2 and a female connector 3;

[0031] The rod body 1 is a round rod structure, and both ends of the rod body 1 are respectively glued to the first glue portion 203 and the second glue portion 301 of the male connector 2 and the female connector 3 to form a complete carbon fiber sucker rod assembly.

[0032] The left side of the female connector 3 is provided with a second adhesive portion 301 and the other side is provided with a sleeve portion 302;

[0033] The sleeve portion 302 is a sleeve-like structure with a threaded hole axially opened inside. It should be noted that its inner wall, except for the threaded hole, has a certain smoothness to ensure sealing with the shoulder portion 202.

[0034] The male connector 2 includes a threaded portion 201, a shoulder portion 202 and a first adhesive portion 203;

[0035] The threaded portion 201 is threadedly connected to the threaded hole of the sleeve portion 302, thereby achieving direct connection between two carbon fiber sucker rods and eliminating the use of couplings in the prior art.

[0036] The shoulder portion 202 is an annular step structure on the rear side of the threaded portion 201 of the male connector 2, and its outer circumference is adapted to the inner wall shape of the sleeve portion 302 to form a good fitting surface; the outer circumference of the shoulder portion 202 is sealedly connected to the inner wall of the sleeve portion 302; the sleeve portion 302 cooperates with the shoulder portion 202 to form a seal between the two, thereby effectively preventing the well fluid from corroding the threaded portion 201 during the use of the sucker rod.

[0037] Furthermore, the first gluing portion 203 and the second gluing portion 301 are circular holes opened on the male connector 2 and the female connector 3 near one end of the rod body 1, and their inner diameter and depth are adapted to the end of the rod body 1; the two ends of the rod body 1 are respectively inserted into the circular holes and glued to the inner wall of the circular holes.

[0038] Furthermore, each end of the rod body 1 is provided with a protrusion 101; the protrusion 101 protrudes axially outward from the rod body 1; the corresponding first adhesive portion 203 and second adhesive portion 301 of the male connector 2 and the female connector 3 are also provided with grooves in the axial direction that match the shape of the protrusion 101 and are for the protrusion 101 to engage with; specifically, the protrusion 101 is a rectangular parallelepiped structure, and the groove is a square groove. The combination of the protrusion 101 and the groove increases the bonding area between the rod body 1 and the male connector 2 and the female connector 3, making the bonding more secure; and the combination of the protrusion 101 and the groove also structurally prevents the rod body 1 from rotating relative to the male connector 2 and the female connector 3 during use, ensuring stable force transmission and connection reliability during oil pumping.

[0039] Furthermore, the end of the sleeve portion 302 of the female connector 3 is also provided with a snap-fit cover edge; the corresponding end of the shoulder portion 202 of the male connector 2 is provided with a stepped step; the two snap fit together, thereby enhancing the sealing of the connection between the male connector 2 and the female connector 3 and preventing impurities such as well fluid from entering the connection part.

[0040] Furthermore, the inner wall of the sleeve portion 302 is provided with multiple sealing grooves, each containing a sealing ring 303. The sealing ring 303 is an elastic sealing element adapted to fit within the sealing grooves. Made of rubber, it can have a circular or rectangular cross-section. After the male connector 2 and female connector 3 are connected, the sealing ring 303 is squeezed and deformed, filling the gap between the inner wall of the sleeve portion 302 and the shoulder portion 202 of the male connector 2. This creates an effective sealing barrier, preventing well fluid from corroding the threaded portion 201 and extending the service life of the carbon fiber sucker rod.

[0041] Furthermore, the rod body 1, male connector 2, and female connector 3 are all made of carbon fiber material; carbon fiber has excellent properties such as high strength, high modulus, low density, and corrosion resistance. Its high strength and high modulus properties enable the carbon fiber sucker rod to withstand large tension and torque, meeting the working requirements during the oil production process; the low density feature reduces the overall weight of the sucker rod, facilitating installation and operation underground, and reducing energy consumption; the corrosion resistance ensures that the sucker rod is not easily corroded in harsh well fluid environments, extending its service life. At the same time, the bonding performance between carbon fiber materials is good. Compared with the combination of the carbon fiber rod body 1 and the traditional steel joint, the bonding between the carbon fiber components in the present invention is more solid and reliable, which can better achieve the coordinated work of the overall structure and improve the comprehensive performance of the carbon fiber sucker rod.

[0042] Furthermore, a wrench square neck 4 is provided on the outer circumference of the male connector 2 and the female connector 3; the wrench square neck 4 is a square recessed structure arranged on the outer circumference of the male connector 2 and the female connector 3, and its structure is suitable for engagement operations with tools such as wrenches, which facilitates operators to use tools for installation and disassembly, thereby improving work efficiency.

[0043] The working principle and process are as follows:

[0044] Apply an appropriate amount of high-strength glue evenly to both ends of the rod body 1. Insert one end of the rod body 1 into the circular hole of the first adhesive portion 203 of the male connector 2. During the insertion process, carefully align the protrusion 101 at the end of the rod body 1 with the groove of the first adhesive portion 203 of the male connector 2 so that the protrusion 101 smoothly fits into the groove. Then apply appropriate pressure and maintain it for a period of time, generally ranging from several minutes to tens of minutes depending on the curing characteristics of the glue, until the glue cures, thus completing the connection between the rod body 1 and the male connector 2. Using the same method, glue the other end of the rod body 1 to the second adhesive portion 301 of the female connector 3, ultimately forming a complete carbon fiber sucker rod assembly.

[0045] Connecting carbon fiber sucker rod assemblies requires only docking the male connector 2 and female connector 3 of adjacent carbon fiber sucker rod assemblies. Specifically, align the threaded portion 201 of the male connector 2 with the threaded hole of the sleeve portion 302 of the female connector 3 and slowly screw it in. During the screw-in process, use a tool such as a wrench to clamp the wrench square neck 4 on the outer circumference of the male and female connectors 3 to keep the axes of the male connector 2 and female connector 3 aligned to prevent damage to the threads. When the threaded portion 201 of the male connector 2 is fully screwed into the sleeve portion 302 of the female connector 3, and the shoulder portion 202 is in close contact with the inner wall of the sleeve portion 302, the buckle cover edge and the step should snap into place, completing the connection.

[0046] The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

Claims

1. A carbon fiber sucker rod that is easy to connect, characterized in that: include: Rod body (1), male connector (2) and female connector (3); The rod body (1) is a round rod-shaped structure, and the two ends of the rod body (1) are respectively glued to the first glue-bonding portion (203) and the second glue-bonding portion (301) of the male connector (2) and the female connector (3); The left side of the female connector (3) is provided with a second adhesive portion (301), and the other side is provided with a sleeve portion (302); The sleeve portion (302) is a sleeve-shaped structure, and a threaded hole is axially opened inside the sleeve; The male connector (2) comprises a threaded portion (201), a shoulder portion (202) and a first adhesive portion (203); The threaded portion (201) is threadedly connected to the threaded hole of the sleeve portion (302); The shoulder portion (202) is an annular step structure on the rear side of the threaded portion (201) of the male connector (2). The outer circumference of the shoulder portion (202) is sealedly connected to the inner wall of the sleeve portion (302); the sleeve portion (302) cooperates with the shoulder portion (202) to form a sealing structure between the two.

2. The carbon fiber sucker rod for easy connection according to claim 1, characterized in that: The first adhesive bonding portion (203) and the second adhesive bonding portion (301) are circular holes formed on the male connector (2) and the female connector (3) near one end of the rod body (1); the two ends of the rod body (1) are respectively inserted into the circular holes and bonded to the inner walls of the circular holes.

3. The carbon fiber sucker rod for easy connection according to claim 2, characterized in that: A protrusion (101) is provided at each end of the rod body (1); the protrusion (101) protrudes outward along the axial direction of the rod body (1); and the first adhesive bonding portion (203) and the second adhesive bonding portion (301) of the corresponding male connector (2) and female connector (3) are also provided with grooves in the axial direction that are adapted to the shape of the protrusion (101) and are provided for the protrusion (101) to be engaged.

4. The carbon fiber sucker rod for easy connection according to claim 1, characterized in that: The end of the sleeve portion (302) of the female connector (3) is also provided with a buckling cover edge; the end of the corresponding shoulder portion (202) of the male connector (2) is provided with a stepped step; the two are buckled with each other.

5. The carbon fiber sucker rod for easy connection according to claim 1, characterized in that: A plurality of sealing grooves are provided on the inner wall of the sleeve portion (302), and sealing rings (303) are provided in the sealing grooves.

6. The carbon fiber sucker rod for easy connection according to claim 1, characterized in that: The rod body (1), the male connector (2) and the female connector (3) are all made of carbon fiber material.

7. The carbon fiber sucker rod for easy connection according to claim 1, characterized in that: A wrench square neck (4) is provided on the outer circumference of the male connector (2) and the female connector (3).

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