High-sealing flux-cored soluble ball

Abstract

The invention relates to the technical field of oil and gas well resource exploitation, and particularly discloses a high-sealing flux-cored soluble ball. The high-sealing flux-cored soluble ball comprises an outer surface coating layer, a soluble metal layer is arranged in the outer surface coating layer, and a dissolution assisting material is arranged in the soluble metal layer; and the outer surface coating layer is made of a soluble elastic material. The high-sealing flux-cored soluble ball can be tightly attached to a bridge plug ball seat in a sealed mode, pressure rising and bearing ofa bridge plug are guaranteed, and fracturing operation is smoothly completed; and the dissolving speed of the soluble bridge plug can be increased, one-time ball throwing, one-time fracturing, rapiddissolving and automatic drifting are achieved, the operation time of operators is shortened, the operation period is shortened, and the production economic benefits are improved.

Description

technical field [0001] The invention relates to the technical field of oil and gas well resource exploitation, in particular to a high-tightness drug core soluble ball. Background technique [0002] In the current exploitation of conventional oil and gas well resources, staged fracturing or multi-layer fracturing is generally used for fracturing production, and in fracturing operations, most of the current market uses soluble bridge plugs as conventional fracturing methods. After the fracturing operation is completed, the soluble bridge plug will dissolve with the soaking of the well fluid, differentiate, and finally break away from the wellbore. [0003] In recent years, due to the large-scale use of soluble bridge plugs in on-site fracturing operations, the fracturing process and technology have been improved to a large extent, and considerable benefits have been achieved in terms of energy saving, cost reduction and production increase. However, with the scale-up of the ...

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Problems solved by technology

[0007] Aiming at the above-mentioned problems that the sealing between the soluble ball and the soluble bridge plug cannot be guaranteed, the dissolution efficiency of the soluble bridge plug cannot be controlled, and the production cost is high and the operation efficiency is low, the present invention provides a medicine with high sealing performance. The core soluble ball can closely fit and seal with the ball seat of the bridge plug to ensure the pressure of the bridge plug, bear the pressure, and successfully complete the fracturing operation; and can accelerate the dissolution rate of the soluble bridge plug, realizing one ball and one fracturing , rapid dissolution, automatic well opening, reducing the operating time of the operator, shortening the operating cycle, and improving the economic benefits of production

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