Soluble ball seat

Abstract

The invention provides a soluble ball seat, belongs to the technical field of oil well setting, and aims to solve the problems that in the prior art, the number of dissolved residues is large, the dissolving condition is harsh, a shaft is prone to being blocked, and the diameter of a fluid channel is small before a soluble bridge plug is dissolved. The soluble ball seat comprises a connecting rod, a cross wing, a push cylinder connecting piece, two lower split pieces, another two opposite inverted upper split pieces, a base, a cone, a plurality of slip bowls, gaskets and a lower push ring, wherein the cross wing is coaxially arranged with the connecting rod, and the cross wing is in threaded connection with the rod part at the upper end of the connecting rod; the push cylinder connecting piece is coaxially arranged outside the cross wing and is in sliding fit with the cross wing; the two lower split pieces are in sliding fit with the push cylinder connecting piece, and the other two opposite inverted upper split pieces are in sliding fit with the cross wing; the base is connected with the lower end of the cross wing and is coaxially arranged with the cross wing; the cone is connected with the lower surface of the base, and the cone and the base are coaxially arranged; the multiple slip bowls are arranged outside the cone, and the plurality of slip bowls are in contact fit with a plurality of inclined surfaces outside the lower end of the cone and are fixed through bolts; the gaskets are connected with the lower ends of the slip bowls; and the lower push ring is in threaded connection with the rod part at the lower end of the connecting rod, and the lower push ring is connected with the gaskets.

Description

technical field [0001] The invention belongs to the technical field of oil well setting, and in particular relates to a soluble ball seat. Background technique [0002] At present, oilfields attach great importance to the development and exploration of tight oil and shale gas. The main means adopted are long horizontal sections and extended displacement horizontal wells. Use multi-stage cluster perforation and bridge plugging as a supporting technology. This technology can realize one-time downhole, cluster perforation, staged fracturing, has the advantages of fast construction speed and high fracturing efficiency, and is the main means of reservoir stimulation in unconventional oil and gas fields. [0003] The bridge plug technology has always been the most important of the multi-stage cluster perforation bridge plug technology, and the most widely used one is the soluble bridge plug. The soluble bridge plug has the characteristics of light weight and degradability under ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a soluble ball seat, which solves the problems in the prior art that there are many dissolved residues, harsh dissolution conditions, easy to cause wellbore blockage, and small diameter of the fluid channel before the soluble bridge plug is dissolved.

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