Integral drain valve for oil pump

Abstract

The oil pump integrated oil discharge fixed valve relates to the technical field of oil pump tools, which comprises a valve cover body, the inside of the valve cover body is sequentially provided with a main flow channel, an oil discharge channel and a on-off channel from top to bottom, a compression joint is threadedly connected to the lower end of the valve cover body, a plurality of auxiliary flow channels extending along the axial direction are formed around the main flow channel of the valve cover body, and the flow channel cross-sectional area of the auxiliary flow channels is smaller than that of the main flow channel. The oil discharge valve and the fixed valve in the traditional technology are both in a split type, which leads to a large number of accessories, increases the number of downhole tools, increases the complexity of the pipe string, and affects the convenience in the process of assembly and disassembly. The existing oil discharge valve is limited by the structure of the flow channel, which cannot quickly flow and discharge, thereby affecting the working efficiency of the pump body.

Description

Technical Field

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

[0002] Currently, during the development of multi-layer oilfield systems, conventional fixed valves cannot achieve pressure transmission from top to bottom for hydraulically set packers installed under the pump during sealing and production operations, thus preventing the hydraulically set packers from setting. Although hollow fixed valves can successfully set the hydraulic packers, a valve ball needs to be inserted from the tubing after the packer is set, so it cannot be connected to an impact-type drain valve. Later, when the tubing string is pulled out, the crude oil in the tubing cannot be drained, which wastes resources and pollutes the environment.

[0003] A prior art patent with publication number CN202065168U discloses a solution comprising a pusher assembly and a one-way valve assembly. The pusher assembly has the following structure: a pusher rod is located on the wall of the center hole of the upper connector; the pusher rod has a rectangular hole on its wall, into which a drain pin is inserted; a cap is fixed at the top of the pusher rod; a ring-shaped positioning spring is located on the outer wall of the cap; the ring-shaped positioning spring fixes the cap in the upper center hole of the upper connector. The one-way valve assembly has the following structure: a ring-shaped valve seat is fixed in the center hole of the lower connector; a valve cover is located on the upper surface of the valve seat; a valve ball is located on the valve cover, the diameter of which is smaller than the diameter of the upper center hole of the valve cover; the inner diameter of the center hole of the valve seat is smaller than the diameter of the valve ball. The effects are: it ensures that liquid and pressure are transmitted from top to bottom; it achieves one-way flow; and the liquid pumped on can be discharged into the well when the tubing string is pulled up.

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

[0005] First, the existing drain valve and fixed valve are both separate units, resulting in a large number of accessories, increasing the number of downhole tools, increasing the complexity of the tubing string, and affecting the convenience of assembly and disassembly.

[0006] Secondly, existing drain valves, limited by the structure of the flow channel, cannot quickly handle flow and discharge, thus affecting the working efficiency of the pump.

[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 integrated drain valve for oil pumps. This solves the problem that in traditional technologies, the drain valve and the fixed valve are separate units, resulting in a large number of accessories, increasing the number of downhole tools, increasing the complexity of the tubing string, and affecting the convenience of assembly and disassembly. It also addresses the issue that existing drain valves, limited by the structure of the flow channel, cannot quickly pass through and drain, thus affecting the working efficiency of the pump.

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

[0010] An integrated oil drain valve for an oil pump includes a valve cover. Inside the valve cover, from top to bottom, there are interconnected main flow channel, oil discharge channel, and on / off channel. A clamping connector is threaded to the lower end of the valve cover.

[0011] The valve cover has several auxiliary flow channels extending axially around the main flow channel, and the cross-sectional area of ​​the auxiliary flow channels is smaller than that of the main flow channel.

[0012] As an optimized solution, the upper end of the valve cover is provided with a tapered channel that gradually narrows from top to bottom. The upper port of the main flow channel is connected to the lower port of the tapered channel, and the upper port of the auxiliary flow channel penetrates the inclined sidewall of the tapered channel.

[0013] As an optimized solution, the upper port of the switching channel is provided with several guide ribs, and a flow channel is formed through the area between adjacent guide ribs.

[0014] As an optimized solution, a valve ball is provided in the area below the guide rib of the on / off channel.

[0015] As an optimized solution, the lower port of the on / off channel is provided with a positioning groove, a sealing ring is inserted into the positioning groove, and the upper port of the sealing ring abuts against the valve ball.

[0016] As an optimized solution, the upper end face of the compression joint abuts against the lower end face of the sealing ring.

[0017] As an optimized solution, a pin hole is provided on the side wall of the valve cover to connect the oil unloading channel, and an oil drain pin is threaded into the pin hole.

[0018] As an optimized solution, the valve cover body has connecting threads on its outer wall near the upper end.

[0019] As an optimized solution, the lower port of the valve cover is provided with a connector thread groove, the diameter of which is larger than the diameter of the positioning groove.

[0020] As an optimized solution, the on / off channel is arranged in a gradually narrowing manner from bottom to top in the area where the guide rib is located.

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

[0022] Integrating the functions of the traditional "fixed valve + drain valve": The traditional separate fixed valve and drain valve are integrated into a single module, eliminating the valve cover and other structures in the traditional technology, thereby reducing the number of downhole tools, reducing the complexity of the tubing string, and reducing the risk of leakage;

[0023] Furthermore, the overall height is reduced by adopting a combined design, which decreases the clearance under the pump and improves pump efficiency;

[0024] By constructing several auxiliary flow channels extending axially around the main flow channel, several additional auxiliary flow channels are constructed on the basis of the existing main flow channel. This increases the discharge channel and flow area, thereby increasing the flow area and reducing oil flow resistance during oil production; and increasing the discharge channel and improving the working efficiency of the pump body during oil discharge. 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] In the diagram: 1-valve cover; 2-main flow channel; 3-oil unloading channel; 4-on / off channel; 5-guide rib; 6-flow channel; 7-auxiliary flow channel; 8-oil drain pin; 9-valve ball; 10-sealing ring; 11-clamping joint; 12-joint thread groove. Detailed Implementation

[0028] 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.

[0029] like Figure 1 As shown, the integrated oil drain valve for the oil pump includes a valve cover 1. Inside the valve cover 1, from top to bottom, there are interconnected main flow channel 2, unloading channel 3, and on / off channel 4. The lower end of the valve cover 1 is threadedly connected to a clamping connector 11.

[0030] The valve cover 1 has several auxiliary flow channels 7 extending axially around the main flow channel 2. The cross-sectional area of ​​the auxiliary flow channels 7 is smaller than that of the main flow channel 2.

[0031] The upper end of the valve cover 1 is provided with a tapered channel that gradually narrows from top to bottom. The upper port of the main flow channel 2 is connected to the lower port of the tapered channel, and the upper port of the auxiliary flow channel 7 penetrates the inclined side wall of the tapered channel.

[0032] The upper end of the switching channel 4 is surrounded by several guide ribs 5, and a flow channel 6 is formed through the area between adjacent guide ribs 5.

[0033] A valve ball 9 is installed in the area below the guide rib 5 of the on / off channel 4.

[0034] The lower port of the on / off channel 4 is provided with a positioning groove, and a sealing ring 10 is inserted into the positioning groove. The upper port of the sealing ring 10 abuts against the valve ball 9.

[0035] The upper end face of the compression joint 11 abuts against the lower end face of the sealing ring 10.

[0036] A pin hole is provided on the side wall of the valve cover 1 to connect the oil unloading channel 3, and an oil drain pin 8 is threadedly connected inside the pin hole.

[0037] The valve cover 1 has connecting threads on its outer wall near the upper end.

[0038] The lower port of the valve cover 1 is provided with a connector thread groove 12, the diameter of which is larger than the diameter of the positioning groove.

[0039] The on / off channel 4 is located in the area where the guide rib 5 is located, and it is set in a gradually narrowing manner from bottom to top.

[0040] Compared with the prior art, the beneficial effects of this utility model are:

[0041] Integrating the functions of the traditional "fixed valve + drain valve": The traditional separate fixed valve and drain valve are integrated into a single module, eliminating the valve cover and other structures in the traditional technology, thereby reducing the number of downhole tools, reducing the complexity of the tubing string, and reducing the risk of leakage;

[0042] Furthermore, the overall height is reduced by adopting a combined design, which decreases the clearance under the pump and improves pump efficiency;

[0043] By constructing several auxiliary flow channels 7 extending axially around the main flow channel 2, several auxiliary flow channels 7 are constructed on the basis of the existing main flow channel 2, thereby increasing the discharge channel and flow area. This increases the flow area and reduces oil flow resistance during oil production, and increases the discharge channel and improves the working efficiency of the pump during oil discharge.

[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 integrated oil drain valve for an oil pump, characterized in that: The valve cover (1) is internally provided with a main flow channel (2), an oil discharge channel (3) and an on-off channel (4) from top to bottom in sequence, The valve cover (1) is provided with a plurality of auxiliary flow channels (7) extending along the axial direction around the main flow channel (2), and the flow channel cross-sectional area of the auxiliary flow channel (7) is smaller than that of the main flow channel (2).

2. The integrated drain valve for a sucker rod pump as defined in claim 1, wherein: The upper end of the valve cover (1) is provided with a tapered channel from top to bottom, the upper end of the main flow channel (2) is communicated with the lower end of the tapered channel, and the upper end of the auxiliary flow channel (7) penetrates the inclined side wall of the tapered channel.

3. The integral drain valve for a sucker rod pump as defined in claim 1, wherein: The upper end of the on-off channel (4) is provided with a plurality of flow guide ribs (5), and the flow channel (6) is formed by the area between adjacent flow guide ribs (5).

4. The integral drain valve of claim 3, wherein: The area below the flow guide rib (5) of the on-off channel (4) is provided with a valve ball (9).

5. The integral drain valve of claim 4, wherein: The lower end of the on-off channel (4) is provided with a positioning groove, the sealing ring (10) is inserted into the positioning groove, and the upper end of the sealing ring (10) is in abutment with the valve ball (9).

6. The integral drain valve of claim 5, wherein: The upper end surface of the compression joint (11) is in abutment with the lower end surface of the sealing ring (10).

7. The integral drain valve of claim 1, wherein: The side wall of the valve cover (1) is provided with a pin hole communicated with the oil discharge channel (3), and the oil discharge pin (8) is threadedly connected in the pin hole.

8. The integral drain valve of claim 1, wherein: The outer wall of the valve cover (1) near the upper end is provided with a connecting thread.

9. The integral drain valve of claim 5, wherein: The lower end of the valve cover (1) is provided with a joint thread groove (12), and the diameter of the joint thread groove (12) is greater than that of the positioning groove.

10. The integral drain valve for a pumpdown pump of claim 3, wherein: The area of the on-off channel (4) where the flow guide rib (5) is located is tapered from bottom to top.

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