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Oilwell sleeve pressure test plug sealing structure

A technology of sealing structure and oil well casing, which is applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc. It can solve problems such as unfavorable production site construction, improve sealing performance and service life, and stabilize installation position , making easy effects

Inactive Publication Date: 2013-05-08
JIANGSU SHUGUANG OIL DRILLING EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sealing structure of the prior art is not conducive to the construction on the production site, and further improvement is necessary

Method used

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  • Oilwell sleeve pressure test plug sealing structure
  • Oilwell sleeve pressure test plug sealing structure

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Embodiment Construction

[0012] Combine below figure 1 The present invention is further described.

[0013] The oil well casing pressure test plug sealing structure shown in the accompanying drawing is composed of an annular groove on the outer wall of the pressure test plug 1 and a matching sealing ring 2 . The technical improvement of the present invention is that the transverse section of the annular groove on the outer wall of the pressure test plug 1 is dovetail-shaped, that is, the annular groove is wide inside and narrow outside. The sealing ring 2 with the same transverse cross-sectional shape is embedded in the annular groove, and the outer surface of the sealing ring 2 and the inner wall matched with the casing to be tested form a sealing pair. Because the sealing ring 2 is embedded in the annular groove on the outer wall of the pressure test plug 1, the installation position is stable. Even when the pressure test plug 1 and the casing are loaded and unloaded, the sealing ring 2 will not ro...

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Abstract

The invention discloses an oilwell sleeve pressure test plug sealing structure which is composed of an annular groove on the outer wall of a pressure test plug and a sealing ring matched with the annular groove. The cross section of the annular groove on the outer wall of the pressure test plug is swallow-tailed, namely the annular groove is wide inside and narrow outside, the sealing ring with the cross section in a shape same as the annular groove is mounted in the annular groove in an embedded manner, and the outer surface of the sealing ring and an inner wall matched with a to-be-tested sleeve form a sealing pair. The sealing ring is mounted in the annular groove on the outer wall of the pressure test plug in an embedded manner, and mounting position is stable, so that even when the pressure test plug and the sleeve are mounted and demounted, the sealing ring cannot roll in the annular groove to avoid damages to the sealing ring, sealing performance of the sealing structure is effectively improved, the service life of the sealing structure is prolonged effectively, and production cost is saved. The oilwell sleeve pressure test plug sealing structure is especially suitable for large-caliber pressure test plug sleeves needed to be mounted and demounted frequently.

Description

technical field [0001] The invention relates to a sealing structure, in particular to a sealing structure of an oil well casing pressure test plug. Background technique [0002] In order to ensure the safety of the oil well, a routine sealing performance test must be done before the casing is installed. In the sealing performance test, test plugs are firstly installed in the nozzles at both ends of the casing to be tested, and the compressed pressure test plugs are sealed against the outer wall of the ring to seal with the inner wall of the casing. The sealing structure of the pressure test plug in the prior art is composed of an O-ring embedded in an annular groove. The sealing structure is simple, the sealing performance is reliable, and it can meet the pressure test requirements. Due to the particularity of the O-ring seal structure, the installation position of the O-ring is not stable enough, and the frequent loading and unloading of the pressure test plug will easily ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/04
Inventor 蒋家华张希平马吉山
Owner JIANGSU SHUGUANG OIL DRILLING EQUIP CO LTD
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