Ultrahigh pressure blowout preventer top sealing device, sealing device and blowout preventer

Abstract

The top sealing device comprises a top sealing body connected with a front sealing body, supports used for reinforcing the top sealing body are installed on the top sealing body, the top sealing body is of a semicircular structure, the supports are installed on the front face and the rear face of the top sealing body respectively, and the supports are connected with the top sealing body. The top sealing body is of a sealing structure made of rubber, the support is embedded in the edge of the top sealing body, and the support is installed on the top sealing mechanism, so that under the ultrahigh-pressure working condition, the support deforms along with the top sealing mechanism and is tightly attached to the sealing surface, the top sealing mechanism is prevented from being squeezed into a gap of the sealing surface, and damage to rubber parts is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of well control equipment for oil field operations, in particular to an ultra-high pressure blowout preventer top sealing device, a sealing device and a blowout preventer. Background Art

[0002] The gate seal of the blowout preventer is usually in the form of a pure rubber horseshoe. This structure is relatively intact and mature in sealing wellhead pressures below 70MPa. It is currently widely used to seal wellhead pressures of 105MPa, but it is a bit reluctant, has a short service life, and is highly damaged.

[0003] With the development of deep oil and gas wells, when testing the pure rubber horseshoe-shaped top seal on the blowout preventer that seals 140MPa and 175MPa and above wellhead pressure, due to the limited strength of the rubber, severe damage such as extrusion and tearing occurs under high pressure, which cannot meet the fatigue times and requires structural improvement. Utility Model Content

[0004] In view of the above defects or shortcomings, the purpose of the utility model is to provide an ultra-high pressure blowout preventer top sealing device, a sealing device and a blowout preventer.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A top sealing device for an ultra-high pressure blowout preventer comprises a top sealing body connected to a front sealing body, wherein a bracket for reinforcing the top sealing body is installed on the top sealing body.

[0007] The top sealing body is a semicircular structure, and brackets are installed on the front and rear surfaces of the top sealing body.

[0008] The top sealing body is a sealing structure made of rubber, and the bracket is embedded in the edge of the top sealing body.

[0009] The bracket is a bracket made of metal.

[0010] The bracket is an L-shaped metal strip.

[0011] A sealing device comprises a gate body, on which the above-mentioned ultra-high pressure blowout preventer top sealing device is installed.

[0012] A blowout preventer comprises a shell, in which the above-mentioned sealing device is symmetrically installed, and a closing push rod and a side door are installed on the sealing device.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model provides a top sealing device for an ultra-high pressure blowout preventer, a sealing device and a blowout preventer. By installing a bracket on the top sealing mechanism, the bracket can deform along with the top sealing mechanism under ultra-high pressure working conditions and tightly adhere to the sealing surface, thereby preventing the top sealing mechanism from squeezing into the gap between the sealing surfaces and reducing damage to rubber parts.

[0015] Furthermore, the bracket in the utility model is an L-shaped metal strip, which can be vulcanized together with the top sealing mechanism made of rubber. The top sealing strip can be bent freely during installation, which is convenient for installation. In addition, since the metal support strip is thin, it can be easily bent during installation without causing the metal strip to fall off, thereby not affecting installation and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the top sealing device of the ultra-high pressure blowout preventer of the utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the top sealing device of the ultra-high pressure blowout preventer of the utility model. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the structure of the top sealing device of the ultra-high pressure blowout preventer of the utility model. Figure 3 ;

[0019] Figure 4 This is a schematic diagram of the structure of the top sealing device of the ultra-high pressure blowout preventer of the utility model. Figure 4 ;

[0020] Figure 5 This is a schematic diagram of the structure of the blowout preventer of the utility model;

[0021] Figure 6 This is the second schematic diagram of the blowout preventer structure of the utility model.

[0022] In the figure, 1 is a gate body; 3 is a bracket; 4 is a housing; 5 is a push rod; 6 is a side door; 21 is a front sealing body; and 22 is a top sealing body. DETAILED DESCRIPTION

[0023] The utility model will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0024] like Figure 1-4 As shown, the utility model provides a top sealing device for an ultra-high pressure blowout preventer, comprising: a top sealing body 22 connected to a front sealing body 21 , and a bracket 3 for reinforcing the top sealing body 22 is installed on the top sealing body 22 .

[0025] The top sealing body 22 is a semicircular structure. Specifically, the bracket 3 can be installed on the edge of the entire semicircular top sealing body 22 or on one side according to needs, so as to support the top sealing body 22 when it is squeezed.

[0026] It should be noted that the top sealing body 22 is a sealing strip made of rubber, and the bracket 3 is embedded in the edge of the top sealing strip 22. Preferably, the bracket 3 is a bracket made of metal. Since the front sealing body 21 and the top sealing body 22 are both made of rubber, under ultra-high pressure working conditions, the rubber at the dome of the original top sealing strip will squeeze into the gap of the sealing surface, causing damage to the rubber. Since metal brackets are installed on both sides of the rubber dome in the utility model, when under pressure, the metal brackets follow the deformation of the rubber and are tightly attached to the sealing surface, preventing the rubber from squeezing into the gap of the sealing surface, thereby reducing damage to the rubber parts.

[0027] For example, the bracket 3 is an L-shaped metal strip, which is stamped once and vulcanized with rubber. The top seal needs to be bent freely to facilitate installation. Since the metal support strip is thin, it can be easily bent during installation without the metal strip falling off, which does not affect installation and use.

[0028] In an embodiment of the utility model, a sealing device is also provided, including a gate body 1, a front sealing body 21 is installed at the front end of the gate body 1, and the above-mentioned ultra-high pressure blowout preventer top sealing device is installed on the front sealing body 21, and the ultra-high pressure blowout preventer top sealing device includes a top sealing body 22, and a bracket 3 for reinforcing the top sealing body 22 is installed on the top sealing body 22.

[0029] In addition, if Figure 5 The utility model also provides a blowout preventer, comprising: a housing 4, in which the above-mentioned sealing device is symmetrically installed, and a push rod 5 and a side door 6 are installed on the sealing device. Figure 6 When working, the blowout preventer pushes the gate body 1 by the push rod 5, and the left and right gate body assemblies come into contact and squeeze the front seal and top seal rubber to seal the well pressure below. This structure can effectively resist the tearing damage of the rubber squeezed part under ultra-high pressure, and achieve the expected sealing effect and fatigue times.

[0030] It is obvious to those skilled in the art that the above-mentioned specific examples are only preferred schemes of the present invention. Therefore, the improvements and changes that may be made by those skilled in the art to certain parts of the present invention still reflect the principles of the present invention and achieve the purpose of the present invention, and all belong to the scope of protection of the present invention.

Claims

1. An ultra-high pressure blowout preventer top sealing device, characterized in that: include: A top sealing body (22) connected to the front sealing body (21), wherein a bracket (3) for reinforcing the top sealing body (22) is installed on the top sealing body (22).

2. The ultra-high pressure blowout preventer top sealing device according to claim 1, characterized in that: The top sealing body (22) is a semicircular structure, and brackets (3) are installed on the front and rear surfaces of the top sealing body (22).

3. The ultra-high pressure blowout preventer top sealing device according to claim 2, characterized in that: The top sealing body (22) is a sealing structure made of rubber, and the bracket (3) is embedded in the edge of the top sealing body (22).

4. The ultra-high pressure blowout preventer top sealing device according to claim 3, characterized in that: The bracket (3) is a bracket made of metal.

5. The ultra-high pressure blowout preventer top sealing device according to claim 3, characterized in that: The bracket (3) is an L-shaped metal strip.

6. A sealing device, characterized in that: It comprises a gate body (1), on which is mounted an ultra-high pressure blowout preventer top sealing device according to any one of claims 1 to 5.

7. A blowout preventer, characterized in that: include: A shell (4), wherein the sealing device according to claim 6 is symmetrically installed in the shell (4), and a closing push rod (5) and a side door (6) are installed on the sealing device.

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