Slip assembly and bridge plug
A technology of slips and bridge plugs, which is applied in the field of slip components and bridge plugs, and can solve the problems of easy lateral deviation and seat jamming, instability and stability, etc.
Active Publication Date: 2019-08-20
CHINA PETROCHEMICAL CORP +3
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- Description
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- Application Information
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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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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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The invention relates to the field of mechanical structures, aims to solve the problem that an existing slip structure is prone to happening lateral offset or slip sitting is prone to being insecure and instable, and provides a slip assembly and a bridge plug. The slip structure comprises a central tube, end pieces and a plurality of slip sheets; the front end of the central tube is arranged to bea tube head section, the center of the tube head section inwards concaves to form a sliding hole, the outer circumference edge of the tube head section is provided with a plurality of circumferentially-distributed sliding grooves, and the bottom surfaces of the sliding grooves are outward sliding slopes; the end pieces include a front end head portion and a rear sliding shaft portion, and the sliding shaft portion is slidably matched into the sliding hole of the central tube in the axial direction; the rear end faces of the inner sides of the slip sheets in the radial direction are in wedge fit with the sliding slopes, the front end faces of the inner sides of the slip sheets in the radial direction are in wedge fit with the outward slope of the end head portion, and therefore when the central tube slides relative to the end pieces, the slip sheets can be driven to outwards move in the radial direction through the two wedge fit under the resultant force of action force coming from thetube head section and the end head portion. The slip structure has the beneficial effects that lateral offset can be avoided, and slip sitting is 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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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