Three-electrode controllable self-arc-extinguishing discharge switch device structure for underground operation

Abstract

The invention discloses a three-electrode controllable self-arc-extinguishing discharge switch device structure for underground operation. The three-electrode controllable self-arc-extinguishing discharge switch device structure comprises a fixed electrode part, an adjustable electrode part, a trigger electrode part, an insulating layer and a self-arc-extinguishing structure, wherein the fixed electrode part comprises an upper wiring end, a fixed electrode and a set screw, the adjustable electrode part comprises a lower wiring end, an adjustable electrode, a fixing nut, a fastening screw and a fastening nut, the trigger electrode part comprises a trigger electrode wiring end, a trigger electrode, a connecting rod and a fastening screw, and can trigger a discharge switch to be switched on, and the insulating layer comprises an upper end insulating layer, a middle insulating layer and a lower end insulating layer. According to the invention, by means of the structure, the device can guarantee good sealing performance and insulativity underground; the self-arc-extinguishing structure comprises a clamping groove, a U-shaped iron core and an external electric field, so that the electric arc can be rapidly extinguished under the action of the Lorentz force of the external electric field; a pulse discharge switch electrode is made of carbon-tungsten alloy, so that the electro-corrosion resistance is high; and the electrode gap of the discharge switch is adjustable by using the fixing nut and the fastening nut, so that the service life of the switch electrode is prolonged while the discharge voltage grade is adjustable.

Description

technical field [0001] The invention belongs to the field of unconventional shale oil and gas and pulse power, and in particular relates to a structure of a three-electrode controllable self-extinguishing arc discharge switch device for downhole operation. Background technique [0002] my country's shale oil and gas has complex geological conditions, deep burial depth, old strata, and lack of water resources. There are many problems in the development of shale oil and gas. However, my country is rich in shale oil and gas resources, with shale gas reserves of 36.1 trillion cubic meters, ranking first in the world, and shale oil recoverable volume of 5 billion tons, second only to Russia and the United States, ranking third in the world . Under the vigorous promotion of relevant departments and governments, and with the advancement of technology, China's shale oil and gas development prospects are very broad. [0003] In the development of unconventional oil and gas, using pu...

AI Technical Summary

Problems solved by technology

[0004] Shale oil and gas wells at home and abroad often use discharge switches with non-adjustable electrodes when performing pulse power operations. The gap of the discharge switch used in this method is fixed, and the discharge voltage level cannot be adjusted. It is impossible to choose a suitable discharge voltage for different formation characteristics.

If you want to change the discharge voltage, you need to replace the discharge switch, and the operation is complicated

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