A wellhead surface safety control system controls a quick release valve

Abstract

The utility model relates to the field of relief valve, concretely relates to a quick relief valve for wellhead ground safety control system control, the utility model discloses a valve body, and the valve body is provided with first through -hole, and one end of first through -hole is equipped with the import joint, and one end of first through -hole is equipped with the oil discharge joint, and the oil outlet is communicated with in one side of first through -hole, and the valve seat is equipped with the second through -hole that communicates import joint in the first through -hole, and the valve seat is equipped with the valve core of sliding connection of sleeve in one end far from import joint, and the inboard fixed connection of valve core has elastic part, and the fixed connection of steel ball of elastic part far from valve core one end, and steel ball and second through -hole are opposite, and the third through -hole that communicates valve core inside and outside is seted up on valve core, and the first sealing washer is installed through ladder in the side of oil discharge joint close to import joint. Adopt the technical scheme of the utility model for enhancing the restraint to the sealing washer at the oil discharge port, and the probability of reducing sealing washer loose.

Description

Technical Field

[0001] This utility model relates to the field of relief valve technology, and more specifically, to a fast relief valve for use in a wellhead surface safety control system. Background Technology

[0002] Surface safety valves are surface safety systems designed to ensure the safe extraction and transportation of oil and natural gas. They are used for safety protection at well sites in emergency situations such as oil and gas leaks and fires. Most surface safety valves are controlled by hydraulic oil, meaning that the valve's opening and closing are controlled by the inlet and outlet of the hydraulic fluid. Currently, a return pipe is typically connected directly between the inlet pipe and the oil tank. When the valve needs to be closed, the hydraulic oil in the surface safety valve is released through the return pipe. However, due to the small diameter of the inlet pipe, the drainage speed is slow, thus affecting the valve's closing speed. To address the slow drainage speed of current surface safety valves, a quick-release valve can be installed at the inlet of the surface safety valve. This allows for both the supply of hydraulic oil to the valve and the rapid drainage of the hydraulic oil within, thereby increasing the valve's closing speed and shortening the closing time.

[0003] In the existing technology, the quick-release valve is triggered by a spring. However, in order to ensure the sealing performance when the valve core is against the drain port, the valve core is sealed at the drain port by a sealing gasket. However, every time the valve core is reset, the sealing gasket is also subjected to a certain amount of tension. Over time, the connection between the sealing gasket and the drain port will loosen, affecting the sealing effect. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a quick-release valve for a wellhead surface safety control system, which enhances the constraint on the sealing gasket at the drain port and reduces the probability of the sealing gasket loosening.

[0005] This utility model is achieved through the following technical solution: a quick release valve for wellhead surface safety control system, including a valve body, the valve body having a first through hole, an inlet connector at one end of the first through hole, an oil drain connector at the other end of the first through hole, and an oil outlet connected to one side of the first through hole.

[0006] A valve seat is provided in the first through hole. A second through hole is provided on the valve seat to connect to the inlet connector. A valve core is sleeved and slidably connected to the end of the valve seat away from the inlet connector. An elastic element is fixedly connected to the inner side of the valve core. A steel ball is fixedly connected to the end of the elastic element away from the valve core. The steel ball abuts against the second through hole. A third through hole is provided on the valve core to connect the inner and outer sides of the valve core.

[0007] The drain connector has a platform on the side near the inlet connector, and a sealing gasket groove is formed between the platform and the valve body. A first sealing gasket is installed in the sealing gasket groove. A guardrail is provided on the side of the platform near the inlet connector, and the thickness of the guardrail is less than that of the first sealing gasket.

[0008] An annular abutment is provided on the side of the valve core near the drain connector. The annular abutment is used to abut against the first sealing gasket after the valve core slides toward the drain connector.

[0009] Furthermore, the first sealing gasket is an X-ring.

[0010] Furthermore, both the inlet connector and the drain connector are detachably connected to the valve body.

[0011] Furthermore, a second sealing gasket is provided between the inlet connector and the drain connector and the valve body.

[0012] Furthermore, a third sealing gasket is provided between the valve core and the valve seat.

[0013] Furthermore, the third through hole is used to align with the center of the oil outlet after the valve core slides toward the drain connector.

[0014] Furthermore, an anti-slip plug is provided on the side of the drain connector away from the inlet connector.

[0015] The technical solution of this utility model has at least the following beneficial effects:

[0016] In operation, connect the inlet connector to the hydraulic control system, the outlet to the ground safety valve, and the drain connector to the oil tank. When oil is supplied to the inlet connector, hydraulic oil enters the second through hole. Due to the pressure, the hydraulic oil pushes the steel ball, causing it to disengage from the valve core and drive the entire valve core, making it slide and abut against the first sealing gasket. After the valve core abuts against the first sealing gasket, it prevents hydraulic oil from flowing into the drain connector. Furthermore, because the steel ball is pushed away, hydraulic oil is released into the valve core and from the third through hole back into the first through hole, flowing out from the outlet.

[0017] When the inlet connector is depressurized, the steel ball will adhere to the second through hole under pressure, thus sealing the second through hole. At this time, the valve core will detach from the first sealing gasket, and a passage will be formed between the drain connector and the oil outlet. The hydraulic oil released from the oil outlet can then be released into the oil tank through the drain connector.

[0018] Because the valve core slides back and forth under the action of the spring, the force on the first sealing gasket is repeatedly applied with this sliding motion. Each time the valve core disengages from the first sealing gasket, it pulls on the gasket, making it prone to loosening after prolonged use. Therefore, a stepped platform is created on the drain connector. This platform forms a sealing gasket groove with the valve body, restricting the vertical position of the first sealing gasket. The guardrail on the platform acts as an interceptor; when the valve core disengages and pulls on the first sealing gasket, the guardrail prevents displacement, making the gasket less prone to loosening. Simultaneously, the guardrail is integrated into the drain connector, allowing it to be assembled and then installed into the valve body for easy installation. Once installed inside the valve body, it provides constraint in four directions against the inner wall of the valve body, facilitating disassembly and maintenance. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the quick-release valve for the wellhead surface safety control system of this utility model, with the steel ball abutting against the second through hole.

[0020] Figure 2 This is a cross-sectional view of the quick-release valve for the wellhead surface safety control system of this utility model, with the steel ball not in contact with the second through hole.

[0021] Figure 3 for Figure 1 An enlarged schematic diagram of part A in the diagram.

[0022] Reference numerals in the attached drawings: 1. Valve body; 2. First through hole; 3. Inlet connector; 4. Drain connector; 5. Oil outlet; 6. Valve seat; 7. Second through hole; 8. Valve core; 9. Elastic element; 10. Steel ball; 11. Third through hole; 12. Platform; 13. Sealing gasket groove; 14. First sealing gasket; 15. Annular abutment; 16. Second sealing gasket; 17. Third sealing gasket; 18. Guard plate; 19. Anti-slip plug. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The following detailed description illustrates the specific implementation method:

[0027] Example 1

[0028] As attached Figures 1-3 As shown, a quick-release valve for wellhead surface safety control system includes a valve body 1, a first through hole 2, an inlet connector 3 at one end of the first through hole 2, an oil drain connector 4 at the other end of the first through hole 2, and an oil outlet 5 connected to one side of the first through hole 2.

[0029] A valve seat 6 is installed in the first through hole 2. The valve seat 6 is provided with a second through hole 7 that connects to the inlet connector 3. A valve core 8 is sleeved and slidably connected to the end of the valve seat 6 away from the inlet connector 3. An elastic element 9 is welded and fixed to the inner side of the valve core 8. The elastic element 9 is a spring. A steel ball 10 is welded and fixed to the end of the elastic element 9 away from the valve core 8. The steel ball 10 abuts against the second through hole 7. A third through hole 11 is opened on the valve core 8 that connects the inner and outer sides of the valve core 8. The third through hole 11 is used to be aligned with the center of the oil outlet 5 after the valve core 8 slides towards the drain connector 4.

[0030] The drain connector 4 has a step 12 on the side near the inlet connector 3. A sealing gasket groove 13 is formed between the step 12 and the valve body 1. A first sealing gasket 14 is provided in the sealing gasket groove 13. The first sealing gasket 14 is an X-shaped ring. A guardrail 18 is integrally formed on the side of the step 12 near the inlet connector 3. The thickness of the guardrail 18 is less than that of the first sealing gasket 14.

[0031] An annular abutment 15 is provided on the side of the valve core 8 near the drain connector 4. The annular abutment 15 is used to abut against the first sealing gasket 14 after the valve core 8 slides towards the drain connector 4. Both the inlet connector 3 and the drain connector 4 are detachably connected to the valve body 1 by threads. A second sealing gasket 16 is provided between the inlet connector 3 and the drain connector 4 and the valve body 1. A third sealing gasket 17 is provided between the valve core 8 and the valve seat 6. Both the second sealing gasket 16 and the third sealing gasket 17 are O-rings.

[0032] The drain connector 4 is equipped with an anti-slip plug 19 on the side away from the inlet connector 3.

[0033] In use, the inlet connector 3 is connected to the hydraulic control system, the outlet 5 is connected to the ground safety valve, and the drain connector 4 is connected to the oil tank. When oil is supplied to the inlet connector 3, hydraulic oil enters the second through hole 7. Due to the pressure, the hydraulic oil pushes the steel ball 10, causing it to disengage from the valve core 8, and drives the entire valve core 8, causing it to slide and abut against the first sealing gasket 14. After the valve core 8 abuts against the first sealing gasket 14, it prevents hydraulic oil from flowing into the drain connector 4. The first sealing gasket 14 is an X-ring. The X-ring has a smaller starting torque, is more suitable for high-frequency reciprocating motion, reduces energy consumption, and extends the maintenance cycle. Due to the presence of the guard plate 18, the first sealing gasket 14 only partially contacts the annular abutment 15. The four sealing lips of the X-ring deform independently under pressure, which can adapt to the partial contact process of the annular abutment 15, forming a redundant sealing interface.

[0034] Furthermore, as the steel ball 10 is pushed open, hydraulic oil is released into the valve core 8 and from the third through hole 11 into the first through hole 2. After the valve core 8 slides, the third through hole 11 will be opposite to the oil outlet 5, so that the hydraulic oil released from the third through hole 11 will flow out of the oil outlet 5 more quickly.

[0035] When the inlet connector 3 is depressurized, the steel ball 10 will adhere to the second through hole 7 under pressure, thus sealing the second through hole 7. At this time, the valve core 8 will detach from the first sealing gasket 14, making the drain connector 4 connected to the first through hole 2. A passage is formed between the drain connector 4 and the oil outlet 5, and the hydraulic oil released from the oil outlet 5 can be released into the oil tank through the drain connector 4.

[0036] Because the valve core 8 slides back and forth under the action of the spring, the force on the first sealing gasket 14 is repeatedly applied with the sliding. Whenever the valve core 8 disengages from the first sealing gasket 14, it pulls on the first sealing gasket 14. The pulling force may come from the viscosity, tension, or elastic rebound of the hydraulic oil, making the first sealing gasket 14 prone to loosening after long-term use, resulting in a decrease in sealing performance. Therefore, a step 12 is provided on the drain connector 4. The step 12 forms a sealing gasket groove 13 between itself and the valve body 1, which can restrict the vertical position of the first sealing gasket 14. The baffle 18 on the step 12 can act as an interceptor. When the valve core 8 disengages and pulls on the first sealing gasket 14, the baffle 18 can prevent the displacement of the first sealing gasket 14, making the first sealing gasket 14 less likely to loosen. Meanwhile, its guard plate 18 is integrated on the oil drain connector 4, and can be assembled onto the oil drain connector 4 and then installed into the valve body 1, which is convenient for installation. After being assembled into the valve body 1, it can form a constraint in four directions with the inner side wall of the valve body 1, making the first sealing gasket 14 more stable and easy to disassemble and maintain.

[0037] The inlet connector 3 and the drain connector 4 are detachable, which facilitates manufacturing and assembly as well as disassembly and maintenance. The second sealing gasket 16 can ensure the sealing performance of the inlet connector 3 and the drain connector 4 after assembly.

[0038] Because the valve core 8 is a sliding connection, the gap between it and the valve body 1 is more prone to leakage. The third sealing gasket 17 between the valve core 8 and the valve body 1 effectively prevents hydraulic oil from seeping out from this gap. The anti-slip plug 19 enhances the friction force when the drain connector 4 is connected to the oil tank, reducing the probability of the drain connector 4 loosening.

[0039] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A quick-release valve for use in a wellhead surface safety control system, characterized in that, Includes a valve body (1), the valve body (1) has a first through hole (2), one end of the first through hole (2) is provided with an inlet connector (3), the other end of the first through hole (2) is provided with an oil drain connector (4), and one side of the first through hole (2) is connected to an oil outlet (5); A valve seat (6) is provided in the first through hole (2). A second through hole (7) connecting the inlet connector (3) is provided on the valve seat (6). A valve core (8) is sleeved and slidably connected to the end of the valve seat (6) away from the inlet connector (3). An elastic element (9) is fixedly connected to the inner side of the valve core (8). A steel ball (10) is fixedly connected to the end of the elastic element (9) away from the valve core (8). The steel ball (10) abuts against the second through hole (7). A third through hole (11) connecting the inner and outer sides of the valve core (8) is opened on the valve core (8). The drain joint (4) is provided with a platform (12) on the side near the inlet joint (3). A sealing gasket groove (13) is formed between the platform (12) and the valve body (1). A first sealing gasket (14) is provided in the sealing gasket groove (13). A guardrail (18) is provided on the side of the platform (12) near the inlet joint (3). The thickness of the guardrail (18) is less than that of the first sealing gasket (14). The valve core (8) is provided with an annular abutment (15) on the side near the drain connector (4). The annular abutment (15) is used to abut against the first sealing gasket (14) after the valve core (8) slides toward the drain connector (4).

2. The quick-release valve for wellhead surface safety control system according to claim 1, characterized in that, The first sealing gasket (14) is an X-ring.

3. The quick-release valve for wellhead surface safety control system according to claim 1, characterized in that, Both the inlet connector (3) and the drain connector (4) are detachably connected to the valve body (1).

4. The quick-release valve for wellhead surface safety control system according to claim 3, characterized in that, A second sealing gasket (16) is provided between the inlet connector (3) and the drain connector (4) and the valve body (1).

5. The quick-release valve for wellhead surface safety control system according to claim 1, characterized in that, A third sealing gasket (17) is provided between the valve core (8) and the valve seat (6).

6. The quick-release valve for wellhead surface safety control system according to claim 1, characterized in that, The third through hole (11) is used to be opposite to the center of the oil outlet (5) after the valve core (8) slides toward the drain connector (4).

7. The quick-release valve for wellhead surface safety control system according to claim 1, characterized in that, The drain connector (4) is provided with an anti-slip plug (19) on the side away from the inlet connector (3).

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