Explosion-proof wellhead device

Abstract

The utility model discloses an anti-explosion wellhead device, which relates to the technical field of anti-explosion wellheads and comprises an anti-explosion cylinder connected with a wellhead. The first pressure relief assembly comprises an inner cylinder, an outer cylinder and a plurality of blocking blocks, the outer cylinder is fixedly connected to the periphery of the inner cylinder, a plurality of pressure relief holes are formed in the inner cylinder, the blocking blocks are installed in the pressure relief holes respectively, and the blocking blocks are connected with the outer cylinder through springs; the blade valve is connected to the side, away from the anti-explosion cylinder, of the first pressure relief assembly; the second pressure relief assembly is connected to the side, away from the first pressure relief assembly, of the blade valve, the other side of the second pressure relief assembly is connected with a sealing cover, and the structure of the second pressure relief assembly is the same as that of the first pressure relief assembly. By means of the double pressure relief design and the pressure alarm system, safe operation of the well mouth in the high-pressure environment is guaranteed, and high practicability and reliability are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of explosion -proof well mouth, especially relates to an explosion -proof well mouth device. BACKGROUND

[0002] The well mouth device is a ground instrument installed at the well mouth casing of an oil well, and its main function is to generate and receive acoustic wave pulse signals and complete the conversion of liquid level acoustic wave pulse signals and casing pressure signals.

[0003] The current well mouth device has poor explosion -proof performance, which brings great hidden danger to oil well production, therefore, an explosion -proof well mouth device is provided to discharge the internal gas pressure of the well mouth. CONTENT OF THE UTILITY MODEL

[0004] The utility model mainly aims at providing an explosion -proof well mouth device, through the double design of the first pressure relief assembly and the second pressure relief assembly, the problems in the background art can be effectively solved.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an explosion -proof well mouth device, which comprises an explosion -proof barrel, a first pressure relief assembly, a blade valve and a second pressure relief assembly.

[0006] The explosion -proof barrel is connected with the well mouth.

[0007] The first pressure relief assembly comprises an inner barrel, an outer barrel and a plurality of blocking blocks, the outer barrel is fixedly connected on the periphery of the inner barrel, a plurality of pressure relief holes are formed in the inner barrel, the plurality of blocking blocks are respectively installed in the plurality of pressure relief holes, and the blocking blocks are connected with the outer barrel through springs.

[0008] The blade valve is connected on the side of the first pressure relief assembly away from the explosion -proof barrel.

[0009] The second pressure relief assembly is connected on the side of the blade valve away from the first pressure relief assembly, the other side of the second pressure relief assembly is connected with a cover, and the structure of the second pressure relief assembly is same with that of the first pressure relief assembly.

[0010] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0011] Further, the number of pressure relief holes is same with the number of blocking blocks.

[0012] Further, the blocking blocks are arranged in trapezoidal shape, and the diameter of the side of the blocking block close to the inner barrel is smaller than that of the side away from the inner barrel.

[0013] Further, rubber pads are arranged between the blocking blocks and the pressure relief holes.

[0014] Further, the outer cylinder is provided with a pressure sensor, the pressure sensor is opposite the block, and the pressure sensor is connected with an alarm system.

[0015] Further, the inner cylinder is provided with a thread, and a sealing ring is threadedly sleeved on the thread and arranged on one side of the pressure relief hole.

[0016] The anti-explosion well mouth device has the following advantages.

[0017] 1. The first pressure relief assembly and the second pressure relief assembly are double designed, so that safe pressure relief under high pressure is ensured.

[0018] 2. The pressure sensor and the alarm system are combined, so that the operator can be reminded to take measures in time, and accidents can be avoided.

[0019] 3. The trapezoidal design of the block and the use of the rubber pad ensure good sealing under normal pressure.

[0020] 4. The anti-explosion well mouth device has simple structure, is easy to maintain and operate, and has high reliability.

[0021] The above description is only a summary of the technical scheme of the anti-explosion well mouth device, in order to more clearly understand the technical means of the anti-explosion well mouth device, and the anti-explosion well mouth device can be implemented according to the content of the specification. The following is a detailed description of the preferred embodiments of the anti-explosion well mouth device with reference to the drawings. The specific implementation of the anti-explosion well mouth device is given in detail by the following embodiments and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the anti-explosion well mouth device, and constitute a part of the application. The schematic embodiments of the anti-explosion well mouth device and the description thereof are used to explain the anti-explosion well mouth device, and do not constitute an improper limitation on the anti-explosion well mouth device. In the drawings:

[0023] Fig. 1 The drawings described herein are used to provide a further understanding of the anti-explosion well mouth device, and constitute a part of the application. The schematic embodiments of the anti-explosion well mouth device and the description thereof are used to explain the anti-explosion well mouth device, and do not constitute an improper limitation on the anti-explosion well mouth device. In the drawings:

[0024] Fig. 2 The drawings described herein are used to provide a further understanding of the anti-explosion well mouth device, and constitute a part of the application. The schematic embodiments of the anti-explosion well mouth device and the description thereof are used to explain the anti-explosion well mouth device, and do not constitute an improper limitation on the anti-explosion well mouth device. In the drawings:

[0025] Fig. 3 The drawings described herein are used to provide a further understanding of the anti-explosion well mouth device, and constitute a part of the application. The schematic embodiments of the anti-explosion well mouth device and the description thereof are used to explain the anti-explosion well mouth device, and do not constitute an improper limitation on the anti-explosion well mouth device. In the drawings:

[0026] In the diagram: 1. Explosion-proof cylinder; 2. First pressure relief assembly; 3. Blade valve; 4. Second pressure relief assembly; 5. Cover; 6. Inner cylinder; 7. Outer cylinder; 8. Plug; 9. Pressure relief hole; 10. Spring; 11. Pressure sensor; 12. Thread; 13. Sealing ring. Detailed Implementation

[0027] The following is in conjunction with the appendix Figs. 1-3 The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0028] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is described as "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is described as "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] like Figs. 1-3 As shown, this utility model provides an explosion-proof wellhead device, including an explosion-proof cylinder 1, a first pressure relief component 2, a blade valve 3, and a second pressure relief component 4;

[0031] The explosion-proof cylinder 1 is connected to the wellhead;

[0032] The first pressure relief assembly 2 comprises an inner cylinder 6, an outer cylinder 7 and a plurality of plugs 8, the outer cylinder 7 is fixedly connected to the outer periphery of the inner cylinder 6, a plurality of pressure relief holes 9 are formed in the inner cylinder 6, the number of the pressure relief holes 9 is the same as that of the plugs 8, the plurality of plugs 8 are respectively installed in the plurality of pressure relief holes 9, the plugs 8 and the outer cylinder 7 are connected through springs 10, when the gas pressure in the inner cylinder 6 is too large, the springs 10 are compressed under the action of pressure, the pressure relief holes 9 are in an open state, thereby relieving the pressure of the inner cylinder 6;

[0033] The plug 8 is trapezoidal, the diameter of the side close to the inner cylinder 6 is smaller than that of the side away from the inner cylinder 6, a rubber pad is arranged between the plug 8 and the pressure relief hole 9, the trapezoidal design of the plug 8 helps the plug 8 to be more easily separated from the pressure relief hole 9 under the action of pressure, and the rubber pad arranged between the plug 8 and the pressure relief hole 9 is used to enhance the sealing effect;

[0034] The blade valve 3 is connected to the side of the first pressure relief assembly 2 away from the explosion-proof cylinder 1, under normal circumstances, the blade valve 3 is in a closed state;

[0035] The second pressure relief assembly 4 is connected to the side of the blade valve 3 away from the first pressure relief assembly 2, the other side of the second pressure relief assembly 4 is connected with a cover 5, the structure of the second pressure relief assembly 4 is the same as that of the first pressure relief assembly 2;

[0036] In actual application, the blade valve 3 and the second pressure relief assembly 4 can be provided with a plurality of groups, when the pressure relief capacity of the first pressure relief assembly 2 is insufficient, the blade valve 3 is opened, and the inner cylinder 6 is synchronously relieved through the second pressure relief assembly 4;

[0037] The outer cylinder 7 is provided with a pressure sensor 11, the pressure sensor 11 is arranged opposite to the plug 8, the pressure sensor 11 is connected with an alarm system, during the pressure relief process, the plug 8 resists the pressure sensor 11, when the pressure exceeds the set value, the alarm system will issue an alarm, thereby warning the operator to further relieve the pressure by increasing the second pressure relief assembly 4;

[0038] The outer periphery of the inner cylinder 6 is provided with a thread 12, a sealing ring 13 is threadedly sleeved on the thread 12, the sealing ring 13 is arranged on one side of the pressure relief hole 9, by rotating the sealing ring 13, a part of the sealing ring 13 is fixed on the outer periphery of the plug 8, thereby fixing the plurality of plugs 8 in the pressure relief hole 9, and the sealing of the pressure relief hole 9 is realized.

[0039] The working principle is as follows:

[0040] When the internal pressure of the wellhead is normal, the blocking block 8 tightly blocks the pressure relief hole 9 under the action of the spring 10, ensuring the sealing of the wellhead; when the internal pressure of the wellhead needs to be relieved, the pressure will push the blocking block 8 away from the pressure relief hole 9, the spring 10 is compressed, the pressure relief hole 9 is opened, and the pressure is released; when the internal pressure of the wellhead exceeds the set value, the alarm system will issue an alarm to remind the operator to take measures, and the operator opens the blade valve 3 to carry out synchronous pressure relief through the first pressure relief assembly 2 and the second pressure relief assembly 4.

[0041] The above is only a preferred embodiment of the present application, and does not limit the present application in any form; any person skilled in the art can easily implement the present application according to the drawings and the above description; however, any equivalent changes, modifications and evolutions made by those skilled in the art within the scope of the technical scheme of the present application, using the above disclosed technical content, are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolutions made according to the essential technology of the present application to the above embodiments are still within the protection scope of the technical scheme of the present application.

Claims

1. An explosion-proof wellhead apparatus, characterized by, Include: Explosion-proof barrel (1), the explosion-proof barrel (1) is connected with well mouth; First pressure relief assembly (2), the first pressure relief assembly (2) includes inner tube (6), outer tube (7) and multiple blocking blocks (8), the outer tube (7) is fixedly connected on the periphery of inner tube (6), multiple pressure relief holes (9) are formed in the inner tube (6), multiple blocking blocks (8) are installed in multiple pressure relief holes (9) respectively, and the blocking block (8) is connected with the outer tube (7) through the spring (10); Blade valve (3), the blade valve (3) is connected on the side, away from the explosion-proof barrel (1), of the first pressure relief assembly (2); Second pressure relief assembly (4), the second pressure relief assembly (4) is connected on the side, away from the first pressure relief assembly (2), of the blade valve (3), and the other side of the second pressure relief assembly (4) is connected with the cover (5), and the structure of the second pressure relief assembly (4) is same with the structure of the first pressure relief assembly (2).

2. A flame arrestor according to claim 1, wherein The number of pressure relief holes (9) is same with the number of blocking blocks (8).

3. A flame arrestor according to claim 1, wherein The blocking block (8) is arranged in trapezoidal shape, and the diameter of the side, close to the inner tube (6), of the blocking block (8) is less than the diameter of the side, away from the inner tube (6).

4. A flame arrestor according to claim 1, wherein The rubber pad is arranged between the blocking block (8) and the pressure relief hole (9).

5. A flame arrestor device according to claim 1, wherein The pressure sensor (11) is arranged on the outer tube (7), the pressure sensor (11) is opposite to the blocking block (8), and the pressure sensor (11) is connected with the alarm system.

6. A flame arrestor device according to claim 1, wherein The thread (12) is arranged on the periphery of the inner tube (6), the sealing ring (13) is threadedly sleeved on the thread (12), and the sealing ring (13) is arranged on one side of the pressure relief hole (9).

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