Novel standard valve

Abstract

The utility model discloses a novel standard valve which comprises a fishing head, an outer pipe assembly is fixedly arranged on the fishing head, an inner pipe assembly is movably arranged in the outer pipe assembly, a valve element assembly is fixedly arranged on the inner pipe assembly, and the valve element assembly is arranged at one end of the outer pipe assembly. According to the novel standard valve, the outer pipe assembly, the inner pipe assembly and the shear pin are used in cooperation, so that the novel standard valve is in different states in the working process and the throwing and fishing process, and in the working state, fluid can be blocked from left to right and can circulate from right to left; in a salvage state, left and right fluids can circulate; the Tesla valve is characterized in that when the Tesla valve is in a working state, fluid needs to pass through the Tesla valve channel, due to the uniflow property of the Tesla valve channel, the fluid cannot pass through the fluid channel smoothly, the purpose of preventing the fluid from flowing is achieved, when the right liquid flows through the Tesla valve channel in the forward direction, the right liquid can pass through the Tesla valve channel smoothly, the overall structure is simple, and operation is convenient. Not only is the use cost reduced, but also the well control risk during oil well operation is reduced.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction technology, and in particular to a novel standard valve. Background Technology

[0002] Oil extraction refers to the act of digging and extracting oil from places where oil reserves are found. During oil extraction, oil and gas flow from the reservoir to the bottom of the well and then rise from the bottom to the wellhead.

[0003] In oil and gas well production operations, standard valves are commonly used to prevent the liquid in the tubing from flowing downwards when testing tubing, setting hydraulic packers, and during gas lift installation shutdown. After the operation is completed, the standard valves are removed from the tubing.

[0004] Existing standard valves use sealing rings and sealing cylinders on the outside to achieve sealing, and internal moving devices to prevent liquid from flowing downwards, but allow it to flow upwards. The internal moving devices usually use metal seals, and the sealing surface is prone to scratches or corrosion. In addition, the cost of manufacturing, processing and maintenance of standard valves is relatively high.

[0005] Therefore, a new type of standard valve is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a novel standard valve to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] A new type of standard valve includes:

[0009] A retrieval head is fixedly provided with an outer tube assembly, an inner tube assembly is movably provided inside the outer tube assembly, a valve core assembly is fixedly provided on the inner tube assembly, the valve core assembly is located at one end of the outer tube assembly, and a nut is fixedly provided on the valve core assembly;

[0010] The outer tube assembly includes an outer cylinder disposed on the retrieval head. An installation hole is provided on one end of the outer cylinder near the valve core assembly. A shear pin is fixedly connected to the inner cavity of the installation hole.

[0011] The inner tube assembly includes an inner tube that moves through the inner cavity of the outer tube. One end of the inner tube extends to the outside of the outer tube and is fixedly mounted on the valve core assembly. The surface of the inner tube has a pressure relief hole that is offset from the mounting hole. The end of the shear pin abuts against the surface of the inner tube.

[0012] As a preferred technical solution, the salvage head includes a salvage neck, one end of which is integrally formed with a connector, and a Tesla valve channel is provided between the salvage neck and the connector, and the outer cylinder is threadedly sleeved on one end of the connector.

[0013] As a preferred technical solution, the movable distance of the inner cylinder within the outer cylinder is greater than the distance the pressure relief hole moves out of the outer cylinder.

[0014] As a preferred technical solution, the surface of the inner cylinder is provided with a groove in an annular structure, and the end of the shear pin is inserted into the inner cavity of the groove.

[0015] As a preferred technical solution, the valve core assembly includes a connecting pipe threaded to the end of the inner cylinder, with a core integrally formed at the end of the connecting pipe away from the outer cylinder, and a nut threaded onto the core.

[0016] As a preferred technical solution, a sealing sleeve is provided on the surface of the core, and the two ends of the sealing sleeve are in contact with the connecting pipe and the nut, respectively.

[0017] As a preferred technical solution, the surface of the inner cylinder is provided with an annular groove, which is located between the pressure relief hole and the groove, and sealing rings are respectively provided between the inner cavity of the groove, the outer cylinder and the retrieval neck, and the inner cylinder and the connecting pipe.

[0018] As a preferred technical solution, a fluid channel is formed between the Tesla valve channel, outer cylinder, inner cylinder, connecting pipe, and nut.

[0019] This utility model has at least the following beneficial effects:

[0020] This application utilizes the combined use of the outer tube assembly, inner tube assembly, and shear pins to enable the novel standard valve to exhibit different states during operation and retrieval. In the operating state, it can block fluid from left to right while allowing flow from right to left. In the retrieval state, fluid can flow in both directions. A unique feature is that when in the operating state, the fluid must pass through the Tesla valve channel. Due to the unidirectional flow nature of the Tesla valve channel, the liquid cannot flow smoothly through the fluid passage, thus achieving the purpose of blocking fluid flow. When the liquid flows forward through the Tesla valve channel from the right, it can pass smoothly. The overall structure is simple, reducing not only operating costs but also well control risks during oil well operations. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the standard valve of this utility model in its working state;

[0022] Figure 2 This is a cross-sectional schematic diagram of the standard valve of this utility model in its working state;

[0023] Figure 3 This is a schematic diagram of the standard valve of this utility model in a fishing state;

[0024] Figure 4This is a cross-sectional schematic diagram of the standard valve of this utility model in a fishing state;

[0025] Figure 5 This is a cross-sectional schematic diagram of the inner tube assembly and sealing ring of the standard valve of this utility model.

[0026] In the diagram: 100, retrieval head; 110, retrieval neck; 120, connector; 130, Tesla valve passage; 200, outer tube assembly; 210, outer cylinder; 220, mounting hole; 300, inner tube assembly; 310, inner cylinder; 311, groove; 312, slot; 320, pressure relief hole; 400, valve core assembly; 410, connecting pipe; 420, core; 500, nut; 600, shear pin; 700, sealing sleeve; 800, sealing ring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-5 This utility model provides a novel standard valve, including a retrieval head 100, an outer tube assembly 200, an inner tube assembly 300, a valve core assembly 400, and a nut 500. The outer tube assembly 200 is fixedly mounted on the retrieval head 100, and the inner tube assembly 300 is movably mounted inside the outer tube assembly 200. The inner tube assembly 300, the valve core assembly 400, and the nut 500 are connected end to end in sequence. The outer tube assembly 200 includes an outer cylinder 210 mounted on the retrieval head 100, with the surface of the outer cylinder 210 close to the valve core assembly. One end of component 400 is provided with a mounting hole 220, and a shear pin 600 is fixedly connected to the inner cavity of the mounting hole 220; the inner tube assembly 300 includes an inner tube 310 that movably passes through the inner cavity of the outer tube 210, one end of the inner tube 310 extends to the outside of the outer tube 210 and is fixedly mounted on the valve core assembly 400, and the surface of the inner tube 310 is provided with pressure relief holes 320 that are staggered from the mounting hole 220, and four pressure relief holes 320 are distributed in a ring at equal intervals, and the end of the shear pin 600 abuts against the surface of the inner tube 310.

[0029] The salvage head 100 includes a salvage neck 110, one end of which is integrally formed with a connector 120. A Tesla valve channel 130 is provided between the salvage neck 110 and the connector 120. The outer cylinder 210 is threaded onto one end of the connector 120. Through the Tesla valve channel 130, unidirectional fluid transmission can be achieved without any moving parts or external energy input.

[0030] The movable distance of the inner cylinder 310 within the outer cylinder 210 is greater than the distance of the pressure relief hole 320 moving out of the outer cylinder 210, so that after the shear pin 600 cuts, the outer cylinder 210 and the inner cylinder 310 can move relative to each other, allowing the pressure relief hole 320 to be fully exposed, thus ensuring the fluid flow effect.

[0031] The inner cylinder 310 has a groove 311 with an annular structure on its surface. The end of the scissor 600 is inserted into the inner cavity of the groove 311. The use of the groove 311 and the scissor 600 can improve the connection between the scissor 600 and the inner cylinder 310 and prevent the inner cylinder 310 and the outer cylinder 210 from moving relative to each other in case of accident.

[0032] The valve core assembly 400 includes a connecting pipe 410 threadedly connected to the end of the inner cylinder 310. The end of the connecting pipe 410 away from the outer cylinder 210 has an integrally formed core 420, and a nut 500 is threadedly connected to the core 420.

[0033] The core 420 is fitted with a sealing sleeve 700. The two ends of the sealing sleeve 700 are in contact with the connecting pipe 410 and the nut 500, respectively. The sealing sleeve 700 can improve the sealing performance of the connection between the core 420 and the nut 500.

[0034] The inner cylinder 310 has an annular groove 312 on its surface. The groove 312 is located between the pressure relief hole 320 and the groove 311. Sealing rings 800 are provided between the inner cavity of the groove 312, the outer cylinder 210 and the retrieval neck 110, and the inner cylinder 310 and the connecting pipe 410. The sealing rings 800 can improve the sealing between the inner cylinder 310 and the outer cylinder 210, between the connector 120 and the outer cylinder 210, and between the inner cylinder 310 and the connecting pipe 410.

[0035] A fluid channel is formed between the Tesla valve passage 130, the outer cylinder 210, the inner cylinder 310, the connecting pipe 410, and the nut 500.

[0036] The working principle of this utility model is: when the new standard valve is in a working state (such as...) Figures 1-2 As shown), when the fluid flows through the left and right ends, it must pass through the Tesla valve channel 130. Due to the one-flow nature of the Tesla valve channel 130, the kill fluid cannot pass smoothly through the fluid channel.

[0037] When the new standard valve is in a salvage state (such as...) Figure 2-4 As shown, the shear pin 600 is cut off, causing the inner tube assembly 300 to lose its constraint. This allows the outer cylinder 210 and the pressure relief hole 320 to move relative to each other, so that the inner cylinder 310 can drive the pressure relief hole 320 out of the inner cavity of the outer cylinder 210, thus achieving the effect of fluid flow in both directions.

[0038] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel standard valve, characterized in that, include: A retrieval head (100) is fixedly provided with an outer tube assembly (200), an inner tube assembly (300) is movably provided inside the outer tube assembly (200), a valve core assembly (400) is fixedly provided on the inner tube assembly (300), the valve core assembly (400) is located at one end of the outer tube assembly (200), and a nut (500) is fixedly provided on the valve core assembly (400). The outer tube assembly (200) includes an outer cylinder (210) disposed on the retrieval head (100). An installation hole (220) is provided on the surface of the outer cylinder (210) near the valve core assembly (400). A shear pin (600) is fixedly connected to the inner cavity of the installation hole (220). The inner tube assembly (300) includes an inner tube (310) that movably penetrates the inner cavity of the outer tube (210). One end of the inner tube (310) extends to the outside of the outer tube (210) and is fixedly mounted on the valve core assembly (400). The surface of the inner tube (310) is provided with a pressure relief hole (320) that is offset from the mounting hole (220). The end of the shear pin (600) abuts against the surface of the inner tube (310).

2. The novel standard valve according to claim 1, characterized in that: The salvage head (100) includes a salvage neck (110), one end of which is integrally formed with a connector (120). A Tesla valve channel (130) is provided between the salvage neck (110) and the connector (120). The outer cylinder (210) is threaded onto one end of the connector (120).

3. The novel standard valve according to claim 2, characterized in that: The movable distance of the inner cylinder (310) within the outer cylinder (210) is greater than the distance by which the pressure relief hole (320) moves out of the outer cylinder (210).

4. The novel standard valve according to claim 3, characterized in that: The inner cylinder (310) has a groove (311) with an annular structure on its surface, and the end of the shear pin (600) is inserted into the inner cavity of the groove (311).

5. The novel standard valve according to claim 4, characterized in that: The valve core assembly (400) includes a connecting pipe (410) threaded onto the end of the inner cylinder (310), and a core body (420) integrally formed at the end of the connecting pipe (410) away from the outer cylinder (210), and a nut (500) threaded onto the core body (420).

6. The novel standard valve according to claim 5, characterized in that: The core (420) is fitted with a sealing sleeve (700), and the two ends of the sealing sleeve (700) are in contact with the connecting pipe (410) and the nut (500) respectively.

7. The novel standard valve according to claim 6, characterized in that: The inner cylinder (310) has an annular groove (312) on its surface. The groove (312) is located between the pressure relief hole (320) and the groove (311). Sealing rings (800) are provided between the inner cavity of the groove (312), the outer cylinder (210) and the retrieval neck (110), and the inner cylinder (310) and the connecting pipe (410).

8. The novel standard valve according to claim 7, characterized in that: A fluid channel is formed between the Tesla valve channel (130), the outer cylinder (210), the inner cylinder (310), the connecting pipe (410), and the nut (500).

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