CN210888871U

CN210888871U - Extrusion expanding type sealing device

Info

Publication number: CN210888871U
Application number: CN201921409827.2U
Authority: CN
Inventors: 陈冬; 毛文勇; 黄龙; 吴凌云; 魏德会
Original assignee: SJS Ltd
Current assignee: SJS Ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2020-06-30
Anticipated expiration: 2029-08-28

Abstract

The utility model relates to an oil drilling field, especially an extrusion expanding sealing device, it unique part lies in: the connecting section is arranged at one end of the body, the other end of the body is a reducing section, a series of bulges are arranged on the outer wall of the reducing section, and a sealing mechanism is arranged on the reducing section. The utility model has the advantages that: the sealing device has good sealing effect and can still be normally used after partial sealing components fail.

Description

Extrusion expanding type sealing device

Technical Field

The utility model relates to an oil drilling field, especially an extrusion expanding sealing device.

Background

In recent years, with the increasing development of exploration and development techniques, downhole tools are used in a variety of harsh conditions, requiring various seals to deal with the sealing of different tools from the tubing.

The sealing device is used as an important component of a large-drift-diameter packer, the temperature resistance, pressure resistance and corrosion resistance of the sealing device directly influence the use effect, service life and the like of the downhole tool, the sealing and pressure-bearing effects must be ensured when the sealing device works in a strongly-corrosive and high-temperature downhole environment, if the structural design of the sealing device is not reasonable, the sealing leakage between the sealing device and an oil pipe is caused, and the tool fails, so that a great deal of difficulty is brought to the design, production, use and other processes of the downhole tool. In summary, the conventional large-bore packer sealing assembly structure of the conventional downhole tool is difficult to meet the working condition requirements, and therefore a reliable sealing assembly structure is urgently needed to guarantee the normal use requirements of the downhole tool.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an extrusion expanding sealing device, he not only seals effectually and still can normal use after partial seal part became invalid.

Realize the utility model discloses the technical scheme of purpose is: an extrusion expansion type sealing device, characterized in that: the reducer is provided with a body, one end of the body is a connecting section, the other end of the body is a reducing section, a series of bulges are arranged along the outer wall of the reducing section, a sealing mechanism is arranged on the reducing section, the sealing mechanism consists of a sealing sleeve sleeved on the outer wall of the reducing section and a sealing ring arranged in an O-shaped groove on the inner wall of the reducing section, and the inner wall of the sealing sleeve is provided with a series of depressions matched with the bulges on the outer wall of the reducing section.

And the diameter of the middle part of the variable-diameter section of the body is smaller than the diameters of the two ends.

And the thickness of the pipe wall of the variable-diameter section of the body is gradually reduced from inside to outside.

And the number of the series of bulges on the outer wall of the reducing section is 4-10.

The utility model has the advantages that: 1. and a series of bulges are arranged along the outer wall of the reducing section and matched with the sealing mechanism, so that the sealing effect is good. 2. The sealing mechanism is divided into a plurality of independent parts by a series of bulges on the outer wall of the reducing section, and the sealing effect of the rest parts can be ensured even if the sealing element of one part fails in the use process, so that the sealing mechanism can be normally used.

Drawings

FIG. 1 is a schematic view of a squeeze-and-expand seal;

FIG. 2 is a view of FIG. 1 showing a state of use of the press-to-expand type sealing apparatus;

fig. 3 is a state of use of the press-expanding type sealing device with reference to fig. 2.

Detailed Description

Referring to fig. 1 to 3, the present invention will be further described with reference to the following embodiments.

The utility model relates to an oil drilling field, especially an extrusion expanding sealing device, its characterized in that: the variable-diameter section sealing device is provided with a body 1, one end of the body 1 is a connecting section 2, the other end of the body is a variable-diameter section 3, a series of bulges 7 are arranged along the outer wall of the variable-diameter section 3, a sealing mechanism is arranged on the variable-diameter section 3, the sealing mechanism is composed of a sealing sleeve 4 sleeved on the outer wall of the variable-diameter section and a sealing ring 5 arranged in an O-shaped groove on the inner wall of the variable-diameter section 3, and the inner wall of the sealing sleeve 4 is provided with a series of depressions matched with the bulges 7 on the outer wall of the variable-diameter.

A series of bulges 7 are arranged on the outer wall of the reducing section 3 to be matched with the sealing mechanism, so that the sealing effect is good.

The sealing sleeve 4 is made of a high polymer material, such as nitrile rubber or hydrogenated nitrile rubber.

The sealing ring 5 is prepared by vulcanizing the processed surface of the metal framework piece and rubber coated on the metal framework piece together.

The sealing sleeve 4 is divided into a plurality of independent parts by a series of bulges 7 on the outer wall of the reducing section 3, and even if a part of the sealing elements fails in the using process, the rest parts can also ensure the sealing effect, so that the sealing sleeve can be normally used.

A further technical effect may be that the diameter of the variable-diameter section 3 of the body 1 is smaller at the middle than at the two ends.

The diameter of the middle part of the reducing section 3 is smaller than the diameters of the two ends, so that the central pipe 6 can be better attached to the reducing section when being inserted in the using process, and the sealing effect is ensured.

And the thickness of the pipe wall of the reducing section 3 of the body 1 is gradually reduced from inside to outside.

The thickness of the pipe wall of the reducing section 3 is gradually reduced from inside to outside, and when the central pipe 6 is inserted, the part with smaller thickness is stretched to deform, and is tightly attached to the central pipe 6 under the action of elasticity, so that the sealing effect is good.

The further technical effect can also be that the number of the series of protrusions 7 on the outer wall of the reducer section 3 is 4-10.

According to the length difference of body 1, the quantity of a series of archs 7 of reducing section 3 outer wall can be adjusted to the operating mode of adaptation difference.

Claims

1. An extrusion expansion type sealing device, characterized in that: the variable-diameter section sealing device is provided with a body, one end of the body is a connecting section, the other end of the body is a variable-diameter section, a series of bulges are arranged along the outer wall of the variable-diameter section, a sealing mechanism is arranged on the variable-diameter section, the sealing mechanism is composed of a sealing sleeve sleeved on the outer wall of the variable-diameter section and a sealing ring arranged in an O-shaped groove on the inner wall of the variable-diameter section, and the inner wall of the sealing sleeve is provided with a series of depressions matched with the bulges on the outer wall of the variable-.

2. The squeeze-to-expand seal of claim 1, wherein: the diameter of the middle part of the body reducing section is smaller than the diameters of the two ends.

3. The squeeze-to-expand seal of claim 1, wherein: the thickness of the pipe wall of the variable-diameter section of the body is gradually reduced from inside to outside.

4. The squeeze-to-expand seal of claim 1, wherein: the number of the series of bulges on the outer wall of the reducing section is 5.