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bridge plug

A technology of bridge plug and expansion ring, applied in wellbore/well components, sealing/packaging, earth-moving drilling, etc., can solve the problems of unstable stability, easy lateral deviation, sitting and jamming, etc.

Active Publication Date: 2021-07-20
CHINA PETROCHEMICAL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide a slip assembly and a bridge plug to solve the problem that the existing slip assembly is easy to shift laterally or the seat is not firm and stable

Method used

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Experimental program
Comparison scheme
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Embodiment

[0063] see figure 1 , figure 2 , the present invention provides a bridge plug 100, the front of the bridge plug 100 is provided with an anti-seize assembly 1 .

[0064] The bridge plug 100 includes a central tube 2 , a terminal piece 3 , a plurality of slips 4 , a rubber cartridge assembly 5 , and an extrusion ring 6 .

[0065] The central tube 2 is axially slidably fitted to the end piece 3; the slips 4 are fitted between the central tube 2 and the end piece 3, and when the central tube 2 is pressed axially toward the end piece 3 under force , through the wedge fit between the central tube 2 and the slips 4 and the wedge fit between the end piece 3 and the slips 4, the resultant force of the center tube 2 and the end piece 3 on the slips 4 can drive the slips 4 Move outward along the radial direction to realize sitting on the card.

[0066] The central tube 2 includes a column section 7 with a cylindrical outer peripheral surface, the axial front end of the column section...

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PUM

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Abstract

The invention relates to the field of mechanical structures, aims to solve the problem that the existing slip structure is prone to lateral deviation or the seat is not firm and stable, and provides a bridge plug. The slip structure includes: a central pipe, the front end of which is set as a pipe head section, and the center of the pipe head section is concave to form a sliding hole; the outer periphery of the pipe head section is provided with a plurality of chutes distributed along the circumferential direction; the bottom surface of the chute is facing The outer sliding slope; the end piece includes the front end part and the rear sliding shaft part; the sliding shaft part is slidably fitted in the sliding hole of the central tube in the axial direction; a plurality of slips, slips The radially inner rear end wedge is matched with the sliding slope, and the radially inner front end wedge of the slip sheet is matched with the outward slope of the end head, so that when the central tube slides relative to the end piece, the slips The combination of forces received by the two oblique wedges from the pipe head section and the end section can drive the slips to move outward in the radial direction. firm.

Description

technical field [0001] The invention relates to the field of mechanical structures, in particular to a slip assembly and a bridge plug. Background technique [0002] The slip structure is an important part of the bridge plug, which plays the role of making the bridge plug and the casing form a seat. [0003] Then to solve the problem that some slip components are easy to shift laterally or the seat is not firm and stable. Contents of the invention [0004] The present invention aims to provide a slip assembly and a bridge plug to solve the problems that the existing slip assembly is easy to shift laterally or the seat is not firm and stable. [0005] Embodiments of the present invention are achieved like this: [0006] An embodiment of the present invention provides a slip structure, which includes: [0007] The central pipe, the front end of which is set as a pipe head section, and the center of the pipe head section is concave to form a sliding hole; the outer periphe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B23/06E21B33/128
CPCE21B23/06E21B33/1208E21B33/128
Inventor 张正玉铁忠银颜磊刘殿清李阳兵孙玉刚刘兴春李国良李孟来周春生郑伟林
Owner CHINA PETROCHEMICAL CORP