Wax scraping, corrosion preventing and anti-wear centralizing device for sucker rod

Abstract

This utility model relates to the field of sucker rods, and more particularly to a wax scraping, anti-corrosion, anti-wear, and straightening device for sucker rods. The device includes a wax scraper body, a straightening wax scraping sleeve, and an anti-wear lower connector. The wax scraper body is a three-stage rod shaft with external threads at its lower end. The straightening wax scraping sleeve is a sleeve fitted around the middle of the wax scraper body. The anti-wear lower connector is a two-stage rod shaft with a second shaft hole at its top, containing internal threads. The anti-wear lower connector is threaded to the bottom of the wax scraper body. The spiral grooves on the outer circumference of the straightening wax scraping sleeve not only effectively scrape away wax and scale from the inner wall of the tubing, but also guide the scraped wax and scale with the fluid, reducing the risk of tubing blockage. Simultaneously, the spiral design helps reduce fluid resistance and improve pumping efficiency. This utility model effectively solves common problems in oilfield wells such as uneven wear, scaling, and wax buildup.

Description

Technical Field

[0001] This utility model relates to the field of sucker rods, and in particular to a sucker rod wax scraping, anti-corrosion, anti-wear, and straightening device. Background Technology

[0002] Currently, two major challenges are prevalent in the actual production and operation of oil wells in oilfields. First, uneven wear is particularly prominent. Under complex downhole conditions, frequent friction occurs between the sucker rod and the inner wall of the tubing. With the reciprocating motion of the sucker rod, uneven wear intensifies, sometimes even causing the sucker rod to wear through the inner wall of the tubing. This not only triggers well shutdowns, severely impacting normal oil well production and increasing economic losses from production interruptions, but also causes the sucker rod to break off due to excessive wear, falling into the well and posing significant difficulties for subsequent retrieval and repair work, further increasing production costs. Second, scaling and wax deposition in oil wells are equally serious problems. During long-term production, due to the complex composition of crude oil and changes in environmental factors such as temperature and pressure, scale and wax deposits easily form on the inner wall of the tubing. Scale gradually reduces the effective flow area of ​​the tubing, causing damage to the oil layer, hindering the normal flow of crude oil, increasing fluid resistance, and reducing oil well production. Meanwhile, when wax buildup is severe, the inner wall of the tubing will be covered with a thick layer of wax, causing a sharp increase in resistance during pumping, severely affecting pumping efficiency, and possibly even causing the well to shut down completely. In addition, scaling and wax buildup will accelerate the corrosion of tubing and sucker rods. Severe corrosion can cause tubing and sucker rods to break off, further shortening equipment lifespan, increasing production costs, and posing a serious threat to the efficient and stable production of the oilfield. Utility Model Content

[0003] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0004] A sucker rod wax scraping, anti-corrosion, anti-wear, and straightening device includes a wax scraper body, a straightening wax scraper sleeve, and an anti-wear lower connector. The wax scraper body is a three-stage rod shaft with an external thread at its lower end. The straightening wax scraper sleeve is a sleeve fitted onto the middle of the wax scraper body. The anti-wear lower connector is a two-stage rod shaft with a second shaft hole at its top. An internal thread is provided in the second shaft hole, and the anti-wear lower connector is threaded to the bottom of the wax scraper body.

[0005] Furthermore, the scraper body has a through shaft hole along its axis, and the uppermost shaft section of the scraper body has a through hole with a groove cross-section. The through hole horizontally penetrates the scraper body and communicates with the shaft hole. The top of the shaft hole has an internal thread.

[0006] Furthermore, a pair of grooves are provided on the upper step of the sucker rod body, and the grooves are spaced 90 degrees apart from the through hole in a circumferential direction.

[0007] Furthermore, the step length in the middle of the scraper body is the same as that of the straightening scraper sleeve, and the outer diameter of the step in the middle of the scraper body is the same as the inner diameter of the straightening scraper sleeve. The outer periphery of the straightening scraper sleeve is provided with spiral patterns.

[0008] Furthermore, the scraper body and the straightening scraper sleeve are interference fit.

[0009] Furthermore, the outer periphery of the wear-resistant lower joint has multiple through holes II, which penetrate the shaft hole II and the outside of the wear-resistant lower joint.

[0010] The beneficial effects of this utility model are as follows:

[0011] The spiral pattern on the outer circumference of the stabilizing scraper sleeve can not only effectively scrape off the wax and scale from the inner wall of the tubing, but also guide the scraped wax and scale with the fluid through the spiral pattern, reducing the risk of tubing blockage. At the same time, the spiral pattern design helps to reduce fluid resistance and improve oil extraction efficiency.

[0012] By combining the main body of the wax scraper with the straightening wax scraper sleeve, the sucker rod can be effectively supported, reducing its uneven wear inside the tubing, protecting the tubing and sucker rod from wear, avoiding well shutdown or sucker rod breakage due to wear, and improving the production efficiency and safety of the oil well.

[0013] The scraper body and the anti-wear lower connector are connected by threads, facilitating installation and disassembly, as well as on-site maintenance and component replacement. The shaft hole and through hole one inside the scraper body, along with through hole two on the anti-wear lower connector, form fluid channels, helping to reduce fluid resistance and improve oil extraction efficiency.

[0014] This invention effectively solves common problems in oil wells such as uneven wear, scaling, and wax buildup, improving the production efficiency and safety of oil wells, reducing maintenance costs and downtime, and providing strong support for the sustainable development of oil fields. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a side view of the structure of this utility model;

[0017] Figure 3 This is a front view structural diagram of the present invention;

[0018] Figure 4 for Figure 3Schematic diagram of the cross-sectional structure at point AA;

[0019] Figure 5 This is a schematic diagram of the exploded structure of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1-Scraper body; 101-Shaft hole one; 102-Through hole one; 103-Groove; 2-Straightening scraper sleeve; 201-Spiral thread; 3-Wear-resistant lower connector; 301-Shaft hole two; 302-Through hole two; 4-External thread; 5-Internal thread. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] The sucker rod scraping, anti-corrosion, and anti-wear straightening device includes a scraper body 1, a straightening scraper sleeve 2, and an anti-wear lower connector 3. The scraper body 1 is a three-stage rod shaft with an external thread 4 at its lower end. The straightening scraper sleeve 2 is a sleeve fitted onto the middle of the scraper body 1. The anti-wear lower connector 3 is a two-stage rod shaft with a shaft hole 301 at its top and an internal thread 5 inside the shaft hole 301. The anti-wear lower connector 3 is threadedly connected to the bottom of the scraper body 1. The scraper body 1 is threadedly connected to the anti-wear lower connector 3 by the engagement of its lower external thread 4 with the internal thread 5. The straightening scraper sleeve 2, fitted onto the middle of the scraper body 1, straightens the sucker rod during its reciprocating motion, reducing uneven wear between it and the inner wall of the tubing.

[0023] The scraper body 1 has a through-hole 101 along its axis. The uppermost shaft section of the scraper body 1 has a through-hole 102 with a grooved cross-section. The through-hole 102 horizontally penetrates the scraper body 1 and communicates with the shaft hole 101. The shaft hole 101 has internal threads 5, all of which can engage with each other. The through-hole 102 communicates with the shaft hole 101. During oil extraction, fluid can enter the shaft hole 101 through the through-hole 102, helping to balance pressure and reduce the risk of equipment damage caused by pressure differences. It also provides some lubrication.

[0024] A pair of grooves 103 are provided on the upper step of the sucker rod body 1. The grooves 103 are circumferentially spaced 90 degrees from the through hole 102. The grooves 103 can increase the contact area between the wax scraper body 1 and the surrounding fluid. During the movement of the sucker rod, the fluid forms a certain vortex in the grooves 103, which helps to remove the wax and dirt generated during the wax scraping process and prevents them from accumulating on the surface of the wax scraper body 1. The 90-degree interval allows for a more complex flow path of the fluid, further improving the wax scraping and cleaning effect. The length of the step in the middle of the wax scraper body 1 is the same as that of the straightening wax scraper sleeve 2, and the outer diameter of the step in the middle of the wax scraper body 1 is the same as the inner diameter of the straightening wax scraper sleeve 2. The outer circumference of the straightening wax scraper sleeve 2 is provided with a spiral pattern 201. The wax scraper body 1 and the straightening wax scraper sleeve 2 are interference fit to ensure a tight connection between the two. The outer periphery of the anti-wear lower connector 3 has multiple through holes 302, which penetrate the shaft hole 301 and connect to the outside of the anti-wear lower connector 3. These through holes 302 communicate with the outside through the shaft hole 301. During oil extraction, fluid can flow through these through holes 302 between the shaft hole 301 and the outside, forming a fluid channel. This helps reduce fluid resistance and improve oil extraction efficiency. Simultaneously, the through holes 302 also balance pressure, reducing the risk of equipment damage due to pressure differences and ensuring stable operation of the device.

[0025] Preferably, the entire device is chrome-plated, which significantly enhances its oxidation and corrosion resistance, extends its service life, and reduces maintenance costs.

[0026] Through the above specific embodiments, those skilled in the art can easily implement this utility model. However, it should be understood that this utility model is not limited to the specific embodiments described above. Based on the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

Claims

1. A sucker rod wax scraping, anti-corrosion, anti-wear, and straightening device, characterized in that: The device includes a wax scraper body (1), a straightening wax scraper sleeve (2), and an anti-wear lower connector (3). The wax scraper body (1) is a three-stage rod shaft, and the lower end of the wax scraper body (1) is provided with an external thread (4). The straightening wax scraper sleeve (2) is a sleeve that is fitted onto the middle part of the wax scraper body (1). The anti-wear lower connector (3) is a two-stage rod shaft, and the top of the anti-wear lower connector (3) is provided with a shaft hole two (301). The shaft hole two (301) is provided with an internal thread (5). The anti-wear lower connector (3) is threaded to the bottom of the wax scraper body (1), and the lower stage of the anti-wear lower connector (3) is provided with an external thread (4). The scraper body (1) has a through shaft hole (101) along its axis. The uppermost shaft section of the scraper body (1) has a through hole (102) ... The length of the steps in the middle of the scraper body (1) is the same as that of the straightening scraper sleeve (2), and the outer diameter of the steps in the middle of the scraper body (1) is the same as the inner diameter of the straightening scraper sleeve (2). The outer periphery of the straightening scraper sleeve (2) is provided with spiral patterns (201). The wear-resistant lower connector (3) has multiple through holes (302) on its outer periphery, and the through holes (302) penetrate the shaft hole (301) and the outside of the wear-resistant lower connector (3).

2. The sucker rod wax scraping, anti-corrosion, anti-wear, and straightening device according to claim 1, characterized in that: A pair of grooves (103) are provided on the upper step of the scraper body (1), and the grooves (103) are circumferentially spaced 90 degrees from the through hole (102).

3. The sucker rod wax scraping, corrosion prevention, wear resistance, and straightening device according to claim 1, characterized in that: The main body (1) of the wax scraper and the straightening wax scraper sleeve (2) are interference fit.

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