自激振荡式旋转冲击钻井工具水力元件性能分析与优化

Performance analysis and optimization for hydraulic components of self-oscillating rotary impact drilling tool

基于提高水力能量的利用效率可有效提高钻速的认识,提出了自激振荡式旋转冲击钻井方法。采用大涡模拟的方法分析了自激振荡式旋转冲击钻井工具水力元件的工作机制。采用正交试验方案设计法,对水力元件的结构参数进行了数值模拟优化,并据优化结果研制了自激振荡式旋转冲击钻井工具。现场试验结果显示,优化后的自激振荡式旋转冲击钻井工具的提速效果明显优于优化前,表明所采用的分析和优化方法正确可行。研究结果为自激振荡式旋转冲击钻井技术的发展提供了依据。

Self-oscillating rotary percussion drilling method based on raising utilization efficiency of hydraulic power to improve ROP was proposed,the key of using this method is to adopt self-oscillating rotary impact drilling tool.Working mechanism of self-oscillating hydraulic components was analyzed with the large eddy simulation analysis method.Using the orthogonal design,the structural parameters of self-oscillation hydraulic components were optimized.Based on the optimal results,the self-excited oscillation rotary percussion drilling tool was developed.The field test results showed that the effect of improving ROP of the optimized self-oscillating rotary impact drilling tool is much better than the old tool be the method of optimizing self-excited oscillation hydraulic components is correct and feasible.This method provided a theoretical basis for the further development of this kind technique.