Centralizing rotatable anti-eccentric-wear super-strong solid sucker rod

Abstract

A centralizing rotatable anti-eccentric wear super-strong solid sucker rod relates to the technical field of sucker rods and comprises a sucker rod body, a centralizer is connected to the sucker rod body in a knocking-in mode in the radial direction of the sucker rod body, and the centralizer is rotatably arranged in the radial direction of the sucker rod. The sucker rod centralizer solves the problems that in the prior art, a centralizer is limited by the structure of the centralizer, multiple assembling steps are needed, the centralizer can be fixed to a sucker rod, and the assembling efficiency of equipment is affected; the problems that after an existing centralizer and a sucker rod are assembled, the centralizer and the sucker rod are fixed in position and cannot rotate freely, eccentric wear is caused, and the hoisting cost and maintenance are increased are solved.

Description

Technical Field

[0001] This utility model relates to the field of sucker rod technology, specifically to a straightening, rotatable, anti-wear, ultra-strong solid sucker rod. Background Technology

[0002] Pumping wells have long been the primary method of oil production in oilfields both domestically and internationally. Power is transmitted from the sucker rod to the pump to extract crude oil. Due to the depth and deviated nature of oil wells, the sucker rod comes into contact with and rubs against the inner wall of the tubing. Over time, this can lead to uneven wear and breakage of the sucker rod, causing the well to malfunction. To address this problem, oilfields widely employ centralizers. These centralizers are installed between or on two adjacent sucker rods to prevent or reduce uneven wear. Because the outer diameter of the centralizer is larger than that of the sucker rod and its coupling, it preferentially contacts the inner wall of the tubing, thus protecting the sucker rod.

[0003] The prior art discloses a patent CN205135458U, which includes two identical bodies. Each body includes a connecting part with a semi-circular through groove. One end of the connecting part is provided with a slot, and the other end is provided with a tenon that matches the slot. The tenon and slot of one body are respectively inserted and installed with the slot and tenon of the other body. The sucker rod centralizer adopts a plug-in structure design, which is simple in structure, low in manufacturing cost, and easy to disassemble and assemble. It can effectively solve the problem of sucker rod centralization under complex well conditions, and is safe, reliable, not easy to be damaged, and has a long service life.

[0004] With use, existing devices, including those mentioned above, have gradually revealed shortcomings in this technology, mainly in the following aspects:

[0005] First, existing centralizers are limited by their structure and require multiple assembly steps to fix them to the sucker rod, which affects the assembly efficiency of the equipment.

[0006] Secondly, the existing centralizer, once assembled with the sucker rod, is fixed in position and cannot rotate freely, leading to uneven wear and increasing lifting costs and maintenance.

[0007] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] In view of the shortcomings of the existing technology, this utility model solves the problems of the traditional technology where the centralizer is limited by its structure and requires multiple assembly steps to fix the centralizer to the sucker rod, which affects the assembly efficiency of the equipment; and the existing centralizer and sucker rod are fixed in position after assembly and cannot rotate freely, resulting in uneven wear, which increases the lifting cost and maintenance problem.

[0009] To solve the above problems, this utility model provides the following technical solution:

[0010] A rotatable, anti-wear, high-strength solid sucker rod includes a sucker rod body, on which a centralizer is hammered in along its radial direction. The centralizer is rotatably mounted along the radial direction of the sucker rod.

[0011] As an optimized solution, the side wall of the stabilizer is provided with a knock-in groove that connects to its inner hole, and the stabilizer is radially inserted into the sucker rod body through the knock-in groove.

[0012] As an optimized solution, the centralizer is provided with a number of flow holes around its inner hole.

[0013] As an optimized solution, the cross-section of the flow passage is arranged in a fan-shaped annular pattern.

[0014] As an optimized solution, the inner wall of the flow passage with a smaller diameter is close to the inner hole of the centralizer.

[0015] As an optimized solution, the outer port size of the knock-in slot is larger than the inner port size of the knock-in slot.

[0016] As an optimized solution, the opposite sidewalls of the knock-in groove are arranged in an arc shape.

[0017] As an optimized solution, the relative arcuate inner walls of the knock-in groove are arranged in a gradually expanding manner.

[0018] As an optimized solution, the centralizer is also slidably disposed along the axial direction of the sucker rod.

[0019] As an optimized solution, the straightener is provided with tapered guide surfaces at both ends.

[0020] As an optimized solution, the inner hole of the centralizer is clearance-fitted with the sucker rod body.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] By creating a hammer-in groove on the side wall of the stabilizer, a hammer-in installation method is adopted, which makes installation quick;

[0023] The centralizer features a flow-through hole in the middle, which increases the flow area of ​​the oil pipe and effectively ensures the fluid flow.

[0024] After the centralizer is installed, it can rotate freely to prevent uneven wear, and its position can be flexibly adjusted, reducing wear on the sucker rod and tubing, working frequency, lifting costs, and maintenance. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the centralizer of this utility model;

[0028] Figure 3 This is a schematic diagram of the flow hole structure of this utility model.

[0029] In the diagram: 1-Sucker rod body; 2-Center; 3-Knock-in groove; 4-Flow hole; 5-Conical guide surface. Detailed Implementation

[0030] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0031] like Figures 1 to 3 As shown, the rotatable, anti-wear, ultra-strong solid sucker rod includes a sucker rod body 1, and a centralizer 2 is hammered into the sucker rod body 1 along its radial direction. The centralizer 2 is rotatably arranged along the radial direction of the sucker rod.

[0032] The side wall of the stabilizer 2 is provided with a knock-in groove 3 that connects to its inner hole, and the stabilizer 2 is radially inserted into the sucker rod body 1 through the knock-in groove 3.

[0033] The centralizer 2 has several flow holes 4 around its inner hole.

[0034] The cross-section of the flow passage 4 is arranged in a fan-shaped annular shape.

[0035] The inner wall of the flow hole 4 with a small diameter is close to the inner hole of the centralizer 2.

[0036] The outer port size of the hammer-in groove 3 is larger than the inner port size of the hammer-in groove 3, making it easier to snap into the sucker rod body 1.

[0037] The opposite sidewalls of the hammer-in groove 3 are set in an arc shape.

[0038] The relatively curved inner walls of the insertion groove 3 are set in a gradually expanding manner, which can realize the limiting between the relatively curved inner walls and the sucker rod body 1 during the insertion process, so as to make it easy to fully insert the inner hole of the centralizer 2 into the sucker rod body 1.

[0039] The centralizer 2 is also slidably disposed along the axial direction of the sucker rod.

[0040] The straightener 2 has tapered guide surfaces 5 at both ends.

[0041] The inner hole of the centralizer 2 is clearance-fitted with the sucker rod body 1.

[0042] The sucker rod body 1 is made of high-quality chromium-molybdenum alloy steel and is heat-treated to give it extremely high tensile strength, yield strength and excellent plasticity, which can meet the oil production needs of deep wells and ultra-high load oil wells.

[0043] The centralizer 2 is made of ultra-high molecular weight polyethylene, which has high impact strength and is resistant to chemicals and salt water. The centralizer 2 has a lower coefficient of friction than nylon, resulting in minimal resistance in reciprocating and rotating applications.

[0044] The working principle of this device is as follows:

[0045] By creating a hammer-in groove 3 on the side wall of the centralizer 2, installation is quick and easy;

[0046] The centralizer 2 features a flow hole 4 in the middle, which increases the flow area of ​​the oil pipe and effectively ensures the fluid flow.

[0047] After the centralizer 2 is installed, it can rotate freely to prevent uneven wear, and its position can be flexibly adjusted, reducing wear on the sucker rod and tubing, working frequency, lifting costs, and maintenance.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A rotatable, anti-wear, ultra-strong solid sucker rod, characterized by: Includes a sucker rod body (1), on which a centralizer (2) is hammered in along its radial direction. The centralizer (2) is rotatably mounted along the radial direction of the sucker rod. The centralizer (2) has a knock-in groove (3) on its side wall that connects to its inner hole, and the centralizer (2) is radially inserted into the sucker rod body (1) through the knock-in groove (3).

2. The straightening, rotatable, anti-wear, ultra-strong solid sucker rod according to claim 1, characterized in that: The centralizer (2) has several flow holes (4) arranged around its inner hole.

3. The straightening, rotatable, anti-wear, ultra-strong solid sucker rod according to claim 2, characterized in that: The cross-section of the flow passage (4) is arranged in a fan-shaped annular shape.

4. The straightening, rotatable, anti-wear, ultra-strong solid sucker rod according to claim 3, characterized in that: The inner wall of the flow passage (4) with a small diameter is close to the inner hole of the centralizer (2).

5. The straightening, rotatable, anti-wear, ultra-strong solid sucker rod according to claim 1, characterized in that: The outer port size of the knock-in groove (3) is larger than the inner port size of the knock-in groove (3).

6. The straightening, rotatable, anti-wear, ultra-strong solid sucker rod according to claim 1, characterized in that: The opposite sidewalls of the knock-in groove (3) are arranged in an arc shape.

7. The straightening, rotatable, anti-wear, ultra-strong solid sucker rod according to claim 6, characterized in that: The relative arc-shaped inner walls of the knock-in groove (3) are arranged in a gradually expanding manner.

8. The straightening, rotatable, anti-wear, ultra-strong solid sucker rod according to claim 1, characterized in that: The centralizer (2) is also slidably disposed along the axial direction of the sucker rod.

9. The straightening, rotatable, anti-wear, ultra-strong solid sucker rod according to claim 1, characterized in that: The straightener (2) has tapered guide surfaces (5) at both ends.

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