To drill soft, unconsolidated, usually shallow formations by eroding the "rock" below the bit by hydraulic impact loading alone.
钻进松软、非固结，通常是浅地层时，通过仅仅依靠液力冲击载荷去冲蚀破碎钻头下的岩石。
The results of the research have the important reference and guidance effect to design the hydraulic structure of the PDC bit that using in drilling horizontal well.
该研究成果对水平井PDC钻头的水力结构设计有着重要的借鉴和指导意义。
According to the analysis, it is showed that drill bit design should be combined with hydraulic character of the flow field.
分析表明，钻头的设计应当充分结合其水力学特性进行，对此本文给出了所计算钻头的优化设计建议。
The studies have great engineering signification in guidance of hydraulic structures optimization and improving the performance of diamond cone bit.
研究成果对指导轮式金刚石钻头的水力结构优化设计，提高轮式金刚石钻头的性能具有重要的工程实际意义。
The studies have great engineering signification in guidance of hydraulic structures optimization and improving the performance of diamond cone bit.
研究成果对指导轮式金刚石钻头的水力结构优化设计，提高轮式金刚石钻头的性能具有重要的工程实际意义。
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