Self-adaptive soluble ball seat

Abstract

The invention relates to the technical field of oil exploitation parts, in particular to a self-adaptive soluble ball seat which comprises a magnesium-based external assembly seat and a soluble sealing ball plug. According to the self-adaptive soluble ball seat, a lateral assembly adjusting groove internally provided with a split type inner sealing ring and a turnover type outer side limiting support is formed in the arc-shaped face of the inner side of the sealing taper hole, the impact force of the sealing ball plug can be relieved through the split type inner sealing ring, and therefore the sealing effectiveness is guaranteed; the split type internal sealing ring is extruded by the sealing ball plug to control the overturning type outer side limiting support in a linkage mode, the sealing ball plug is limited from the outer side through the overturning type outer side limiting support, the structural stability of the sealing ball plug in the sealing state is greatly improved, sudden accidents caused by changes of internal pressure and external pressure are avoided, and safety is more excellent; and a transmission hole with a built-in lateral linkage mechanism is formed in the external assembly seat, so that the sealing effect of the sealing ball plug is effectively improved.

Description

technical field [0001] The invention relates to the technical field of oil exploitation components, in particular to an adaptive soluble ball seat. Background technique [0002] Large-scale staged fracturing of horizontal wells is a complex comprehensive technology, in which staged fracturing tools play an important role, and fracturing balls are the key to various staged fracturing tools. The initial staged fracturing balls If it cannot be dissolved or broken in other ways, it will have a negative impact on the production or subsequent operations of oil and gas wells. [0003] With the gradual advancement and deepening of the development of tight gas and shale gas, dissolvable staged fracturing balls have attracted much attention. Soluble balls are one of the important plugging tools for downhole layered and staged fracturing in oil fields. The cooperation of the ball seat and the soluble ball realizes the opening of the sliding sleeve and the plugging of the soluble ball ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in order to solve the problems existing in the above-mentioned background technology, an improved self-adaptive soluble ball seat is provided to solve the problem that most of the soluble ball seats on the market are simple and fixed in structure, and the soluble ball passes through the It is introduced into the opening of the ball seat to close the ball seat, but when the soluble ball is introduced into the ball seat, it is easy to cause damage to the surface and internal seals due to the impact force, which affects the internal sealing. The limit ability of the soluble ball is limited. If the internal and external pressure difference changes, the sealing ability will fail, resulting in insufficient sealing stability, and the installation stability of the ball seat cannot be adaptively increased or decreased according to the internal and external pressure difference, resulting in limited functionality and practicability

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