Oil pump offset inlet valve

Abstract

The oil pump offset type oil inlet valve relates to the technical field of oil pump tools, which comprises a valve body, the valve body is eccentrically provided with a valve ball hole communicating with the inner cavity of the valve body, the lower edge of the valve ball hole is detachably connected with a gland through connecting structure, and the gland and the lower edge of the valve ball hole are detachably connected with a valve seat through connecting structure. The utility model solves the problem that in the traditional technology, the upper thread and the lower internal thread are coaxial and located on one side of the axis of the valve body, the offset internal thread is located on the other side of the axis of the valve body, and a high requirement valve seat mounting hole is arranged on the upper part of the internal thread, which makes it necessary to perform eccentric thread processing during the machining process, thereby increasing the machining difficulty.

Description

Technical Field

[0001] This utility model relates to the technical field of oil pump equipment, specifically to an offset inlet valve for oil pumps. Background Technology

[0002] As oil reservoirs are developed, formation energy will decrease, and fluid supply capacity will decline, necessitating the use of rod pump lifting technology to continue extraction. Among these technologies, oil pump lifting is more adaptable to emulsion wells, waxy wells, and asphalt wells. Offset valve oil pumps are a commonly used type of oil pump. However, current offset valve oil pumps suffer from low load-bearing strength and low tensile strength, making them unsuitable for use with tubing suspended below the pump and packers.

[0003] Feedback pumps are a type of pump used in oil fields to pump heavy oil. Existing feedback pumps have small valve diameters and are lightweight, which often cause them to malfunction when used in heavy oil.

[0004] The existing oil inlet valve structure is as follows Figure 1 As shown, the upper thread 01-1 is connected to the lower part of the upper pump barrel, the lower external thread 01-2 is connected to the lower outer pipe, the lower internal thread 01-3 is connected to the lower pump barrel, the offset internal thread 01-5 is used to install the oil well valve assembly, and the valve seat mounting hole 01-4 is located above the internal thread 01-5.

[0005] The shortcomings of existing technology have gradually become apparent with use, mainly in the following aspects:

[0006] In the existing device, the upper and lower internal threads are coaxial and located on one side of the valve body's axis, while the offset internal thread is located on the other side of the valve body's axis. Furthermore, a high-requirement valve seat mounting hole is provided on the upper part of the internal thread, which requires eccentric thread machining during the processing, increasing the processing difficulty.

[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] To address the shortcomings of existing technologies, this utility model provides an offset inlet valve for an oil pump. This addresses the problem in traditional technologies where the upper and lower internal threads of the device are coaxial and located on one side of the valve body's axis, while the offset internal thread is located on the other side of the valve body's axis. Furthermore, a high-requirement valve seat mounting hole is provided on the upper part of the internal thread, which necessitates eccentric thread machining during processing, increasing the difficulty of the machining process.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] An offset inlet valve for an oil pump includes a valve body with an eccentrically oriented valve ball orifice communicating with its inner cavity. A pressure cap is detachably connected to the lower edge of the valve ball orifice via a connecting structure. A valve seat is detachably connected between the pressure cap and the lower edge of the valve ball orifice via a connecting structure.

[0011] As an optimized solution, the connection structure includes a screw hole on the gland, a threaded hole on the bottom surface of the valve body at the lower edge of the valve ball hole, a screw inserted into the screw hole, and the end of the screw being threadedly connected to the threaded hole.

[0012] As an optimized solution, the gland has a fluid hole, the upper end of the fluid hole has a valve seat hole, and the lower end of the valve seat is fitted into the valve seat hole.

[0013] As an optimized solution, the upper end of the valve body channel is provided with an internal thread.

[0014] As an optimized solution, the lower end of the valve body channel is provided with a lower internal thread.

[0015] As an optimized solution, the upper internal thread and the lower internal thread are coaxially arranged.

[0016] As an optimized solution, the outer wall of the valve body is provided with a lower external thread.

[0017] As an optimized solution, four screw holes, threaded holes, and screws are provided around the fluid hole circumferentially.

[0018] As an optimized solution, a valve ball is movably disposed within the valve ball hole.

[0019] As an optimized solution, the outer diameter of the valve ball is larger than the inner diameter of the valve seat.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] By utilizing a detachable gland and valve seat with a connecting structure, the offset internal thread machining process in traditional techniques is eliminated, the machining difficulty is small, it can be machined on a general lathe, and the machining quality can be guaranteed.

[0022] Furthermore, the gland and valve seat are detachably connected, which facilitates the replacement of parts and the installation and use of the valve ball. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a schematic diagram of the existing technology;

[0025] Figure 2 This is a schematic diagram of the structure of this utility model;

[0026] Figure 3 This is a structural schematic diagram of the valve body of this utility model from a bottom view;

[0027] Figure 4 This is a top view of the structure of the pressure cap of this utility model.

[0028] In the diagram: 1-Valve body; 2-Valve ball hole; 3-Valve ball; 4-Gland; 5-Valve seat; 6-Valve seat hole; 7-Screw; 8-Upper internal thread; 9-Lower internal thread; 10-Lower external thread; 11-Threaded hole; 12-Screw hole. Detailed Implementation

[0029] 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.

[0030] like Figures 2 to 4 As shown, the offset inlet valve of the oil pump includes a valve body 1. The valve body 1 has an eccentrically opened valve ball hole 2 that communicates with its inner cavity. The lower edge of the valve ball hole 2 is detachably connected to a pressure cap 4 by a connecting structure. The pressure cap 4 and the lower edge of the valve ball hole 2 are detachably connected to a valve seat 5 by a connecting structure.

[0031] The connection structure includes a screw hole 12 on the gland 4, and a threaded hole 11 on the bottom surface of the valve body 1 at the lower edge of the valve ball hole 2. A screw 7 is inserted into the screw hole 12, and the end of the screw 7 is threadedly connected to the threaded hole 11. The valve seat 5 is limited between the gland 4 and the valve body 1.

[0032] The pressure cap 4 has a fluid hole, and the upper end of the fluid hole has a valve seat hole 6. The lower end of the valve seat 5 is fitted into the valve seat hole 6.

[0033] The upper end of the passage of valve body 1 is provided with an internal thread 8.

[0034] The lower end of the passage of valve body 1 is provided with a lower internal thread 9.

[0035] The upper internal thread 8 and the lower internal thread 9 are coaxially arranged.

[0036] The outer wall of valve body 1 is provided with a lower external thread 10.

[0037] Screw holes 12, threaded holes 11, and screws 7 are provided in four circumferential directions around the fluid hole.

[0038] A valve ball 3 is movably installed inside the valve ball hole 2.

[0039] The outer diameter of the valve ball 3 is larger than the inner diameter of the valve seat 5.

[0040] The working principle of this device is as follows:

[0041] The upper internal thread 8 of valve body 1 is connected to the upper pump barrel of the feedback oil pump, and the lower internal thread 9 of valve body 1 is connected to the lower pump barrel of the feedback oil pump, so that the upper pump barrel and the lower pump barrel are coaxial.

[0042] By utilizing the detachable gland 4 and valve seat 5 of the connection structure, the offset internal thread in the traditional technology is eliminated, the processing difficulty is small, it can be processed by a general lathe, and the processing quality can be guaranteed.

[0043] Furthermore, the gland 4 and valve seat 5 are detachably connected, which facilitates the replacement of parts and the installation and use of the valve ball 3.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention 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 therein. 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 the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. An offset inlet valve for an oil pump, characterized in that: The valve body (1) is provided with an eccentrically oriented valve ball hole (2) that communicates with its inner cavity. The lower edge of the valve ball hole (2) is detachably connected to a pressure cap (4) by a connecting structure. The pressure cap (4) and the lower edge of the valve ball hole (2) are detachably connected to a valve seat (5) by a connecting structure.

2. The biased inlet valve for an oil pump according to claim 1, characterized in that: The connection structure includes a screw hole (12) on the pressure cap (4), and a threaded hole (11) is provided on the bottom surface of the valve body (1) at the lower edge of the valve ball hole (2). A screw (7) is inserted into the screw hole (12), and the end of the screw (7) is threadedly connected to the threaded hole (11).

3. The biased inlet valve for an oil pump according to claim 2, characterized in that: The pressure cap (4) has a fluid hole, and the upper end of the fluid hole has a valve seat hole (6). The lower end of the valve seat (5) is fitted into the valve seat hole (6).

4. The biased inlet valve for an oil pump according to claim 1, characterized in that: The upper end of the channel of the valve body (1) is provided with an internal thread (8).

5. The biased inlet valve for an oil pump according to claim 4, characterized in that: The lower end of the channel of the valve body (1) is provided with a lower internal thread (9).

6. The biased inlet valve for an oil pump according to claim 5, characterized in that: The upper internal thread (8) and the lower internal thread (9) are coaxially arranged.

7. The biased inlet valve for an oil pump according to claim 1, characterized in that: The valve body (1) has a lower external thread (10) on its outer wall.

8. The biased inlet valve for an oil pump according to claim 3, characterized in that: The screw hole (12), threaded hole (11) and screw (7) are provided in four circumferential directions around the fluid hole.

9. The biased inlet valve for an oil pump according to claim 1, characterized in that: A valve ball (3) is movably disposed within the valve ball hole (2).

10. The biased inlet valve for an oil pump according to claim 1, characterized in that: The outer diameter of the valve ball (3) is larger than the inner diameter of the valve seat (5).

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