叶轮式井底盘阀脉冲射流钻井工具性能分析与优化

发布时间：2018-03-02 03:20

  本文关键词： 脉冲射流 水动力叶轮 数值模拟 优化设计　出处：《石油钻探技术》2017年02期 　论文类型：期刊论文

【摘要】：为进一步提高钻井效率,基于井底不对称流场在清岩与辅助破岩等方面所具有的良好效果,设计了一种以小型水动力叶轮为驱动力来源的叶轮式井底盘阀脉冲射流钻井工具,并通过数值模拟及试验对水动力叶轮与该射流工具进行了优化设计。利用计算流体力学软件Pumplinx对叶轮区域进行了全工况数值模拟,通过分析内部流场的压力、速度以及湍动能的分布特性,总结了叶轮转速与阻力扭矩及轴向力之间的响应关系;通过在该射流工具进口段布置导流块、对叶片轮毂端进行光顺处理以及选取合适的叶片包角等优化措施,让叶轮进口流场得到改善的同时,提高了叶轮的水动力特性并消除了部分轴向力。模拟结果显示,初始叶轮在75r/min转速下可克服的自然负载阻力扭矩从1.07N·m提高到3.93N·m。研究结果表明,所述优化方案能大幅提高叶轮式井底盘阀脉冲射流工具的脉冲性能,优化效果十分显著。
[Abstract]:In order to further improve drilling efficiency, based on the good effect of bottom hole asymmetric flow field in rock cleaning and auxiliary rock breaking, a kind of impeller type well chassis valve pulse jet drilling tool with small hydrodynamic impeller as driving force source is designed. The hydrodynamic impeller and the jet tool are optimized by numerical simulation and test. The full-condition numerical simulation of impeller region is carried out by using computational fluid dynamics software Pumplinx, and the pressure of internal flow field is analyzed. Based on the distribution of velocity and turbulent kinetic energy, the response relationship between impeller speed, resistance torque and axial force is summarized, and the flow guide block is arranged in the inlet section of the jet tool. The optimization measures such as fairing the hub end of the blade and selecting the proper blade envelope angle can improve the inlet flow field of the impeller, improve the hydrodynamic characteristics of the impeller and eliminate some axial forces. The simulation results show that the flow field of the impeller is improved and the axial force of the impeller is eliminated. The natural load resistance torque of the initial impeller can be overcome from 1.07N 路m to 3.93N 路m at 75r / min rotational speed. The results show that the proposed optimization scheme can greatly improve the pulse performance of the impeller well chassis valve pulse jet tool, and the optimization effect is very remarkable.
【作者单位】： 中石化华东石油工程有限公司;国家水泵及系统工程研究中心;
【基金】：中石化江苏石油工程公司重点项目“井底脉冲射流-不对称流场喷射钻井技术”(编号:JS140702) 江苏省博士后科研资助计划“井底脉冲射流-不对称流场喷射钻井技术”(编号:1402088B)资助
【分类号】：TE921.2
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本文编号：1554802