High energy concentration electric pulse plug removal device and operation method

Abstract

The invention discloses a high energy concentration electric pulse plug removal device. The high energy concentration electric pulse plug removal device comprises an electrode device, a filter sectionand a pulse power supply body; the electrode device comprises an electrode body, a control valve, a first sealing ring, a second sealing ring, a positive electrode and a negative electrode, wherein the control valve, the first sealing ring, the second sealing ring, the positive electrode and the negative electrode are arranged on the electrode body correspondingly; the positive electrode and thenegative electrode are disposed opposite to each other up and down in the electrode body, the first sealing ring and the second sealing ring are correspondingly disposed on the upper side and the lower side of the electrode body, the electrode body is internally provided with a communication hole, the control valve is connected to the communication hole through a short tube, and the first sealingring and the second sealing ring are hollow sealing rings and separately communicate with the communication hole; the positive electrode is connected to the pulse power supply body; and an insulatingring is arranged outside the positive electrode, the filter section is connected to the insulating ring in a sleeved mode, and the filter section is separately connected to the power supply body and the electrode device. The high energy concentration electric pulse plug removal device has a high energy utilization rate, good sealing performance, a compact structure and convenient operation, and isapplicable to the fields of oil well plug removal and production increase and mining of coalbed methane and shale gas.

Description

technical field [0001] The invention relates to the technical field of electric pulse plugging removal for oil drilling, coal bed methane, and shale gas mining, in particular to a high-energy-concentrating electric pulse plugging removal device with high energy conversion efficiency and good safety and an operating method. Background technique [0002] In the process of oil drilling and production, due to the mud erosion pollution during the drilling process and the sandstone and cement in the oil-water mixture, after the oil well has been exploited for a long time, the pores of the oil-bearing layer of the oil well will be blocked or the oil-water seepage channel will be narrowed, resulting in oil production in the oil well. The volume is decreasing day by day, and even production stoppage occurs. At present, the commonly used plugging removal methods for oil wells mainly include ultrasonic plugging removal, chemical plugging removal (acidification), water fracturing, etc. ...

AI Technical Summary

Problems solved by technology

The patent publication number is 105952426A and the name is "A device for unblocking and increasing production of oil wells based on hydraulic pulse shock wave" (application number: 201610471227.3). It discloses a downhole electric pulse unblocking device, which is designed and packaged in a film with focusing function. The structure of the discharge electrode, but because the discharge electrode is encapsulated in the film, the pulse shock wave generated by the "hydraulic effect" in the discharge process must first propagate in the liquid in the film, and then act on the oil-water medium in the oil well through the film. Oil well perforation is used to remove plugging. Although this technical solution can avoid the pollution of the oil well medium to the discharge electrode, it will accelerate the attenuation of the shock wave generated by the "hydraulic effect", reducing the effective energy acting on the oil well liquid. At the same time, the discharge electrode and the oil well There is an annular gap between the inner walls, and a large part of the shock wave energy transmitted by the adhesive film will be absorbed by the oil-water mixture in the well through the annular gap. The actual shock energy acting on the oil layer through perforation is limited, which ultimately reduces the energy utilization rate of the electric pulse plugging removal device. Low, the plugging effect is poor or even invalid

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