Single-slips fully-soluble bridge plug

Abstract

The invention discloses a single-slips fully-soluble bridge plug. The single-slips fully-soluble bridge plug comprises a central pipe, a fracturing ball, a sliding sleeve, a rubber cylinder, a backband, a locking ring backband, a locking ring, a cone, a slips and a guiding shoe, wherein the central pipe is an axial hollow structure, the upper end of the central pipe is provided with an insertion pipe connected with exterior and a plurality of uniformly distributed shearing pins, the inner upper end of the central pipe is provided with a variable-diameter cavity for holding the fracturing ball,the conicity of a cross section of the variable-diameter cavity is 20 to 30 degrees, the fracturing ball is a soluble fracturing ball, the sliding sleeve and the backband are arranged outside the central pipe, the rubber cylinder is arranged outside the sliding sleeve in a sleeving manner and positioned between the sliding sleeve and the backband, and the locking ring is arranged between the sliding sleeve and the locking ring backband. The bridge plug does not need the drilling polishing, the bridge plug can be completely dissolved by utilizing a solution containing electrolyte and discharged from the bottom layer, and then the solution with the dissolved bridge plug can flow out a full bore of a shaft to be used in the subsequent production.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling and production equipment, and in particular relates to a single-slip fully soluble bridge plug. Background technique [0002] At present, the layered fracturing of unconventional oil and gas is mainly based on the staged fracturing of composite bridge plugs. Drilling and milling of coiled tubing becomes more and more difficult, and soluble bridge plugs emerge as the times require. However, the soluble bridge plugs currently on the market are either insoluble in slips, or the bridge plugs are set first and then dropped, so they cannot be sealed. Contents of the invention [0003] In order to overcome the disadvantages of the above-mentioned prior art, the present invention provides a single-slip fully soluble bridge plug. The bridge plug does not need to be drilled, and only needs to use the electrolyte solution contained in the bottom layer to completely dissolve the bridge plug and ...

AI Technical Summary

Problems solved by technology

[0002] At present, the layered fracturing of unconventional oil and gas is mainly based on the staged fracturing of composite bridge plugs. Coiled tubing drilling becomes more and more difficult, and soluble bridge plugs emerge as the times require

However, the soluble bridge plugs currently on the market are either insoluble in slips, or the bridge plugs are set first and then dropped, which cannot be sealed.

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