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设计在水平井完井阶段切割生产管的电化学切割工具阴极时,应遵循生产率高、安全可靠和成本低等三原则。加工区供液采用侧流方式,选用浓度为20%的氯化钾电解液。在初始间隙、电解液成分、浓度、温度和流向等已确定的条件下,以切断时间为指标,以阴极宽度、电解液压力和加工电压为试验的三因素,做了阴极电解切割工艺试验。试验表明:(1)加工电压增大,加工区的电流密度随之增加,加工速度加快;(2)电解液压力对切割速度的影响很小;(3)阴极宽度对切断时间的影响仅次于电源电压,阴极愈宽,切断时间愈短,而加工电流愈大。
When designing the cathode of an electrochemical cutting tool that cuts a production tube during horizontal well completion, the three principles of high productivity, safety and reliability, and low cost should be followed. Processing area for the use of lateral flow of liquid, the choice of concentration of 20% potassium chloride electrolyte. Under the conditions of initial gap, electrolyte composition, concentration, temperature and flow direction, the cathodic electrolytic cutting process was tested based on three factors, cathode width, electrolyte pressure and process voltage. The results show that: (1) the processing voltage increases, the current density in the processing zone increases and the processing speed increases; (2) the influence of the electrolyte pressure on the cutting speed is small; (3) the cathode width affects the cutting time only In the power supply voltage, the cathode wider, the shorter the cut-off time, and the greater the processing current.