PB-BBD响应面法优化全金属水力振荡器性能的研究

Optimization of Performance of All-metal Hydraulic Oscillator by PB-BBD Response Surface Method

目前从各类水力振荡器的现场应用看,普遍存在压耗偏大的问题,使钻井液辅助破岩的能力降低。基于自激涡流振荡的原理,设计了一种全金属水力振荡器,为充分发挥其性能,降低压耗,需对振荡器内部结构进行优化。通过Plackett-Burman设计对内部各结构参数进行了筛选试验,确定显著影响参数为射流道宽度、工具厚度和出口直径,再用Box-Behnken Design响应面法对显著影响参数进行分析,得到全金属水力振荡器内部结构参数的优化组合为射流道宽度14 mm、工具厚度41.432 mm、出口直径为46 mm,最后通过数值分析验证了优化方法的有效性。

At present,from the field application of various hydraulic oscillators,the problem of large pressure loss generally exists,then the ability of drilling fluid to assist rock breaking is reduced.Based on the principle of self-excited eddy current oscillation,an all-metal hydraulic oscillator was designed.In order to give full play to its performance and reduce the pressure loss,the internal structure of the oscillator needed to be optimized.Plackett-Burman design was used to screen the internal structural parameters,and the significant influencing parameters were determined as jet channel width,tool thickness and outlet diameter.The response surface method Box-Behnken Design was used to analyze the significant influencing parameters.The optimal combination of the internal structural parameters of the all-metal hydraulic oscillator can be obtained as jet channel width 14 mm,tool thickness 41.432 mm and outlet diameter 46 mm.Finally,the effectiveness of the optimization method was verified by numerical analysis.