Remote hydraulic control balanced valve for blowout preventer

Abstract

The application discloses a remote hydraulic control balance valve for a petroleum blowout preventer and belongs to the field of balance valves for petroleum blowout preventers, which comprises valve groups which are identical in structure and symmetrically distributed in an upper and lower mode, are connected together through a relief valve connecting pipe between the upper and lower valve groups, are connected with the upper part of a blowout preventer ram assembly, and are connected with the lower part of the blowout preventer ram assembly. The remote hydraulic control balance valve can remotely operate a balance valve needle through hydraulic oil, reduces the danger of manual high-pressure operation, is easy to operate, safe and reliable, simple to disassemble, and convenient to use and maintain.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of balance valves for petroleum blowout preventers, in particular to a remote hydraulic control balance valve for a petroleum blowout preventer. BACKGROUND

[0002] Due to the need for operation, the cable or wireline blowout preventer for logging needs to be externally installed with a balance valve, and each pair of gate valve assembly is equipped with a pressure balance valve. The balance valve matched with the blowout preventer needs to be used frequently during operation. The traditional manual balance valve has simple structure, but there are the following three problems in long-term use.

[0003] 1. When operating, personnel need to climb to the high wellhead operation platform under pressure to manually open the valve needle with a special wrench, because it is operated under pressure, the greater the wellhead pressure, the more difficult it is to open;

[0004] 2. Due to the need for installation of the operation process, the installation position of the wellhead blowout preventer is below the operation platform, and it is not easy to operate the balance valve needle manually, and personnel operating in the air also have safety risks.

[0005] 3. Since the balance valve is directly connected with the wellhead pressure, the wellhead pressure will be very high, and once leakage occurs during operation, it will pose a great danger to the operator, and there is a safety hazard in pressure operation.

[0006] Therefore, in order to avoid the danger of personnel operating under pressure in the air, reduce labor, it is very meaningful to research and produce a balance valve which is simple to operate and can be remotely controlled by hydraulic pressure. SUMMARY

[0007] The purpose of the present application is to provide a remote hydraulic control balance valve for a petroleum blowout preventer to solve the above-mentioned problems.

[0008] To solve the above technical problems, the present application adopts the following technical scheme:

[0009] The present application relates to the field of balance valves for petroleum blowout preventers, in particular to a remote hydraulic control balance valve for a petroleum blowout preventer.

[0010] Further, the valve group comprises a valve body, the valve body is externally sleeved with a valve sleeve, the valve sleeve is provided with a through hole for installing the relief valve connecting pipe; the valve body is internally provided with a valve needle; the cross section shape of the valve needle is a cross shape structure, the left end of the valve needle is slidably connected with the valve body through an oil cylinder cover, the right end of the valve needle is slidably arranged at a needle hole in the valve body, and the middle ring part of the valve needle is slidably connected with the inner wall of the valve body; the side wall of the valve body is provided with a hydraulic inlet one and a hydraulic inlet two, the outlet of the hydraulic inlet one is located in the cavity between the middle ring part and the oil cylinder cover, and the outlet of the hydraulic inlet two is located in the cavity between the middle ring part and the needle hole of the valve needle.

[0011] Further, the valve sleeve and the valve body are provided with a sealing element two.

[0012] Further, the valve sleeve and the valve needle are provided with a sealing element one.

[0013] Further, the middle ring part of the valve needle and the valve body are provided with a valve needle sealing element one.

[0014] Further, the right end of the valve needle and the internal needle hole of the valve body are provided with a valve needle sealing element two.

[0015] Further, the valve body and the valve sleeve are provided with a sealing element three.

[0016] Further, the valve body and the blowout preventer are provided with a sealing element four.

[0017] Further, the valve body and the blowout preventer are threadedly connected together.

[0018] Compared with the prior art, the beneficial technical effects of the present application are:

[0019] The remote hydraulic control balance valve for the blowout preventer is used for balancing the pressure difference between the blowout preventer and the blowout pipe and between the upper and lower cavities of the blowout preventer gate, and can install a grease injection port, inject high-viscosity sealing grease through the injection port of the balance valve, and seal the cable (or steel wire). During normal operation, the balance valve is in a closed state, and when the gate is opened, the balance valve needs to be opened first to balance the pressure difference between the upper and lower cavities of the blowout preventer gate, and after the pressure is balanced, the gate can be easily opened, the wellhead fluid pressure can be well controlled, the blowout accident can be effectively prevented, and safe construction can be realized. In summary, compared with the conventional manual balance valve, the remote hydraulic control balance valve can remotely operate the balance valve needle through hydraulic oil, reduces the danger of manual high-pressure operation, is labor-saving and easy to operate, safe and reliable, simple to disassemble, and convenient to use and maintain. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below in combination with the description of the drawings.

[0021] Figure 1 A cross-sectional view of a remote hydraulic control balanced valve for a blowout preventer of the present application;

[0022] Reference signs: 1, valve body; 2, valve sleeve; 3, pressure relief valve connecting pipe; 4, cylinder cover; 5, valve needle; 6, sealing element one; 7, sealing element two; 8, valve needle sealing element one; 9, valve needle sealing element two; 10, sealing element three; 11, sealing element four; A, hydraulic inlet one; B, hydraulic inlet two. DETAILED DESCRIPTION

[0023] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0024] It should be noted that the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more than two, unless otherwise explicitly and specifically limited. The meaning of "several" is one or more than one, unless otherwise explicitly and specifically limited.

[0025] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] As shown in Figure 1 A remote hydraulic control balanced valve for a blowout preventer, comprising valve groups with consistent structure and symmetrically distributed up and down, the valve groups are connected together through a pressure relief valve connecting pipe 3 between the upper and lower valve groups, the valve group located at the upper part is connected with the upper part of the blowout preventer ram assembly, and the valve group located at the lower part is connected with the lower part of the blowout preventer ram assembly.

[0027] The valve group comprises a valve body 1, a valve sleeve 2 is sleeved outside the valve body, and a through hole for mounting a pressure relief valve connecting pipe 3 is formed in the valve sleeve 2. A valve needle 5 is mounted in the valve body 1, the cross section of the valve needle 5 is in the shape of a cross, the left end of the valve needle 5 is slidably connected with the valve body 1 through an oil cylinder cover 4, the right end of the valve needle 5 is slidably mounted at a needle hole in the valve body 1, and the middle ring part of the valve needle 5 is slidably connected with the inner wall of the valve body 1. A hydraulic inlet one A and a hydraulic inlet two B are formed in the side wall of the valve body 1, the outlet of the hydraulic inlet one A is located in the cavity between the middle ring part and the oil cylinder cover 4, and the outlet of the hydraulic inlet two B is located in the cavity between the middle ring part and the needle hole of the valve needle 5.

[0028] A sealing part two 7 is mounted between the valve sleeve 2 and the valve body 1.

[0029] A sealing part one 6 is mounted between the valve sleeve 2 and the valve needle 5.

[0030] A valve needle sealing part one 8 is mounted between the middle ring part of the valve needle 5 and the valve body 1.

[0031] A valve needle sealing part two 9 is mounted between the right end of the valve needle 5 and the needle hole in the valve body 1.

[0032] A sealing part three 10 is mounted between the valve body 1 and the valve sleeve 2.

[0033] A sealing part four 11 is mounted between the valve body 1 and the blowout preventer.

[0034] The valve body 1 and the blowout preventer are threadedly connected together.

[0035] The operation process of the present application is as follows:

[0036] In the operation process, when the blowout preventer gate is closed to the wellhead, due to the operation requirement, the pressure of the upper part of the blowout preventer gate is released, and when the gate is opened again, the valve needle 5 of the upper and lower valve groups needs to be opened first, at this time, the hydraulic control system is started, the hydraulic oil enters the cylinder opening cavity from the B port (that is, the outlet of the hydraulic inlet two B is located in the cavity between the middle ring part and the needle hole), the valve needle 5 is pushed to move away from the valve body 1, the fluid can pass through the connecting pipe 3 to realize pressure communication, and after the pressure of the upper and lower cavities of the blowout preventer gate is balanced, the blowout preventer gate assembly is opened. When the blowout preventer gate assembly is opened, at this time, the hydraulic control system is started, the hydraulic oil enters the cylinder closing cavity from the A port (that is, the outlet of the hydraulic inlet one A is located in the cavity between the middle ring part and the oil cylinder cover 4), the valve needle 5 is pushed to move towards the valve body 1, the valve needle 5 is matched with the inner taper surface of the needle hole of the valve body 1 to realize sealing, and the closing effect is realized.

[0037] The above described embodiments are only to illustrate the preferred modes of the present application, and are not intended to limit the scope of the present application. Any modification and improvement made by those skilled in the art to the technical solutions of the present application without departing from the design spirit of the present application shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A remote hydraulic control balanced valve for a blowout preventer, characterized in that: The valve group is symmetrical and consistent in structure, and is communicated with each other through a pressure relief valve connecting pipe (3) between the upper and lower valve groups. The valve group comprises a valve body (1) and a valve sleeve (2) sleeved outside the valve body (1), and a through hole is formed in the valve sleeve (2) for mounting the pressure relief valve connecting pipe (3); a valve needle (5) is arranged inside the valve body (1); the cross section of the valve needle (5) is in the shape of a cross, the left end of the valve needle (5) is slidably connected with the valve body (1) through an oil cylinder cover (4), the right end of the valve needle (5) is slidably arranged at a needle hole of the valve body (1), and the middle ring part of the valve needle (5) is slidably connected with the inner wall of the valve body (1); a hydraulic inlet one (A) and a hydraulic inlet two (B) are formed in the side wall of the valve body (1), the outlet of the hydraulic inlet one (A) is located in a cavity between the middle ring part and the oil cylinder cover (4), the outlet of the hydraulic inlet two (B) is located in a cavity between the middle ring part and the needle hole of the valve needle (5), a valve needle sealing part one (8) is arranged between the middle ring part of the valve needle (5) and the valve body (1), and a valve needle sealing part two (9) is arranged between the right end of the valve needle (5) and the needle hole of the valve body (1).

2. The remote hydraulic control balanced valve for the blowout preventer of claim 1, wherein: A sealing part two (7) is arranged between the valve sleeve (2) and the valve body (1).

3. The remote hydraulic control balanced valve for the blowout preventer of claim 1, wherein: A sealing part one (6) is arranged between the valve sleeve (2) and the valve needle (5).

4. The remote hydraulic control balanced valve for use in a blowout preventer of claim 1, wherein: A sealing part three (10) is arranged between the valve body (1) and the valve sleeve (2).

5. The remote hydraulic control balanced valve for use in a blowout preventer according to claim 1, characterized in that: A sealing part four (11) is arranged between the valve body (1) and the blowout preventer.

6. The remotely hydraulically piloted balanced valve for use in a blowout preventer according to claim 1, characterized in that: The valve body (1) and the blowout preventer are threadedly connected together.

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