Electric pulse hydraulic fracturing integration device

Abstract

An electric pulse hydraulic fracturing integration device comprises a discharge electrode, a high voltage cable, a line pipe, a high voltage energy storage capacitor, a capsule hole packer, a hole drilling water injection pipe and a capsule water injection pipe. The discharge electrode is fixed to the front end of the line pipe. One end of the high voltage cable is connected to the discharge electrode. The other end of the high voltage cable passes through the line pipe and then is connected to the high voltage energy storage capacitor. The capsule hole packer is strung to the line pipe. The front end of the capsule water injection pipe is extended into the capsule hole packer. The front end of the hole drilling water injection pipe passes through the capsule hole packer. By using the electric pulse hydraulic fracturing integration device, the structure is ingenious, the integration operation of discharge electrode placing, water injection and hole sealing is realized, work efficiencyis high, static pressure water is taken as a medium, an electric pulse generated by the discharge electrode causes the cavitation effect of water so as to continuously amplify fractures in a coal bodyand the water fills the fractures and secondary interstices around a drilling hole, the mechanical property of the coal body is improved, the plasticity of the coal body is increased and an outbursthazard is reduced.

Description

technical field [0001] The invention relates to mining equipment, in particular to an electric pulse hydraulic fracturing integrated device. Background technique [0002] In the mining process of coal mining face, in order to prevent outburst, it is necessary to increase the permeability of coal body as much as possible so that the gas can be fully pre-discharged. As coal mining continues to extend underground, the problems of high geostress, high gas content, high gas adsorption pressure, high heterogeneity and low permeability of coal rocks appearing in the deep are becoming more and more serious. With the rapid advancement of the comprehensive mechanized working face, the stress in the stope is too late to balance. These all lead to the insufficient length of the pressure relief belt in the coal mining face. In coal production, the effect of loosening and blasting is usually improved by increasing the amount of explosives. This method has great potential safety hazards. ...

AI Technical Summary

Problems solved by technology

In this blasting method, since the water only exists in the water bag and does not penetrate into the cracks of the rock formation, the blasting can only loosen the limited rock formation around the drill hole, but cannot loosen the entire rock formation around the drill hole.

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