Built-in circuit structure of CO2 fracturing device

Abstract

The invention relates to the field of CO2 fracturing devices, in particular to a built-in circuit structure of a CO2 fracturing device. The structure comprises an electrode, a screen pipe, a wire, a high-pressure self-tightening sealing structure and a plurality of CO2 fracturing device bodies, wherein each CO2 fracturing device body comprises an inflation head, an inflation valve, a liquid storage pipe, a tension type rupture disk, a release head and a heater; the heater is arranged in the screen pipe; the inflation head, the screen pipe and the heater are connected and then integrally placed in the liquid storage pipe, two electrodes are arranged in the inflation head, electrode plugs are fixed to the right ends of the two electrodes, a wire led out of the electrode is connected with the heater, and the connected wire penetrates through a tensioning type rupture disk with a reserved threading hole, is led out of the pipe through a release head with a threading hole, and is connected with a socket, so that it is conveniently connected with a plug of an electrode of the inflation head of the next CO2 fracturing device during construction. The built-in circuit structure adopted by the invention realizes stable transmission of a circuit connected in series with the CO2 fracturing devices and long-distance implementation of a CO2 fracturing technology.

Description

technical field [0001] The present invention relates to CO 2 The field of cracking devices, especially a kind of CO 2 The cracker has a built-in circuit structure. Background technique [0002] my country is the largest producer and consumer of raw coal in the world, and it is also a country where various mine disasters frequently occur. Among all kinds of coal mine disasters, gas disasters are particularly serious, causing huge economic losses and bad social impact. At the same time, coal bed methane (coal bed methane) is also a clean energy source with broad prospects for development and application. [0003] CO 2 Fracturing is a new type of coal mine gas control technology, which releases energy to crack the coal body through the phase transition of carbon dioxide, which has the advantages of safety, high efficiency, and no pollution. When the fracturing coal body is drilled deep, multiple CO 2 Only when the cracker is connected can the impact range be wider, the ef...

AI Technical Summary

Problems solved by technology

Currently CO 2 There are many ways to connect the cracker to the circuit, such as insulating the bursting disc to make the carbon dioxide cracking tube non-conductive, and soldering wiring devices on both sides of the bursting disc, but this method can easily cause circuit instability and thus cause misfiring

Also CN111595205A describes another series connection method, in which a threading hole is provided on the rupture disc to allow the wire to pass through, but in order to ensure that the internal pressure reaches a predetermined pressure value, the CO 2 The cracker can cause cracks, and the thickness of the bursting disc is designed to be certain. Once a hole is opened on the bursting disc, it is difficult to control the predetermined pressure and the sealing effect of the hole is difficult to guarantee. Casualties are likely to occur during construction

[0004] The disc bursting disc with the traditional shear failure mechanism has a close relationship between the burst pressure of the CO2 cracker and the thickness of the bursting disc and the shear strength of the material. To increase the pressure of the bursting disc, it is necessary to increase the thickness of the bursting disc, which leads to CO2 During the use of the cracker, due to the thickness of the bursting disc, there is a problem of early or delayed pressure relief and sealing, which brings huge safety hazards to the engineering construction

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