气动潜孔锤反循环钻头结构改进与优化设计

Improvement and Optimized Design on the Structure of Pneumatic Down-the-hole Hammer Reverse Circulation Drilling Bit

摘要:

运用理论分析、数值模拟与实验研究相结合的科学研究手段，对影响气动贯通式潜孔锤反循环形成的钻头新增引射孔各参数、底喷孔各参数以及其它相关参数进行优化设计，得到一系列适合不同规格钻头的相关参数值及其回归方程。运用Visual Basic语言，将研究结论与专家的经验总结汇合，编写了钻头参数优选系统软件。研究结论应用于生产试验中取得令人满意的结论，岩矿心采取率达到98%以上，反循环形成顺利，岩矿心完整度好。参数优选系统的建立为该项硬岩钻进技术的完善提供了参考性依据。

Abstract:

By the theoretical analysis, numerical simulation and experiment study, a serial parameters affected reverse circulation of pneumatic hollow down-the-hole drilling were optimized, and the relative parameters and regression equations were achieved, and software of parameters optimization on drilling bit was made with Visual Basic language. According to the research conclusion, construction test was made with more than 98% coring rate. The parameter optimization system provides the reference gist for the hard rock drilling technology.