Bridge plug

A technology of bridge plug and central hole, which is applied in wellbore/well components, earthwork drilling, sealing/isolation, etc., which can solve problems affecting the accuracy of test data, increasing economic costs, and easy to block bridge plugs, etc., to achieve The effect of shortening the spraying time, reducing the liquid flow displacement and preventing the jamming

Active Publication Date: 2015-12-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is easy to block the central hole channel of the bridge plug, thereby affecting the accuracy of the test data
[0003] In the prior art, a central through hole is set inside the bridge plug, and the hole diameter is designed to be small. Therefore, when the bridge plug is easily blocked during the spraying process, it is necessary to drill the bridge plug before testing and production. increased economic costs

Method used

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with accompanying drawing.

[0022] see figure 1 , which is a cross-sectional view of the overall structure of the bridge plug of the present invention. As shown in the figure, the bridge plug 100 includes a joint assembly 1 . The center of the joint assembly 1 is machined into a central hole 11 with a large diameter. Wherein, a stopper assembly 13 is provided inside the large-diameter center hole 11 to reduce the displacement of the bridge plug 100 during pumping. Wherein, the outer diameter of the large-diameter center hole 11 and the stopper assembly 13 is an interference fit.

[0023] The bridge plug 100 also includes a central pipe unit 2 communicating with the large-diameter central hole 11 in the joint assembly 1 .

[0024] The base pipe unit 2 includes a base pipe assembly 21 . In a preferred embodiment, the inner diameter of the inner central hole 211 of the central pipe assembly 21 is sm...

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Abstract

A bridge plug comprises a connector assembly with a large-drift-diameter center hole and a center tube unit communicated with the large-drift-diameter center hole in the connector assembly. A plug stopping assembly is arranged in the large-drift-diameter center hole and used for reducing the displacement of the bridge plug in the pumping process. The bridge plug has the advantages that the sticking problem is reduced in the lowering process, the liquid pumping displacement is reduced when liquid is pumped into a well, the throttling pressure difference problem is reduced in the blow-off process, and blow-off time is shortened as blow-off can be directly performed after fracturing.

Description

technical field [0001] The invention relates to the technical field of oil and gas development, in particular to a bridge plug. Background technique [0002] At present, in the process of oil and gas development, bridge plugs are often used for construction at the oil and gas development site. The bridge plug in the prior art is mainly composed of an upper joint, a central pipe, upper and lower slips, a sealing part and a lower joint. When the bridge plug with this structure is applied in the casing of a horizontal well, since the wellbore is in a horizontal state, the bridge plug needs to be pumped to the bottom of the well. During the pumping of the bridge plug, the pumped fluid is ejected from the center tube of the bridge plug so that it does not reach the grit settling in the lower part of the casing. Therefore, the bridge plug will be hindered by the grit, which will easily lead to a stuck accident during the lowering process of the bridge plug. In addition, during ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/134
Inventor 贾长贵李洪春曾义金牟泽辉蒋廷学魏志红程百利周德华李双明卫然
Owner CHINA PETROLEUM & CHEM CORP
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