钻井利器的故事之“液动潜孔锤”

The story of a drilling weapon： Hydraulic DTH hammer

摘要:

在各种钻探方法中，液动冲击回转钻进具有效率高、质量好、回次长、事故少、成本低等优点，而液动潜孔锤又是液动冲击回转钻进的技术核心。本文梳理了各种液动潜孔锤的结构特点及其与绳索取心钻具、孔底动力钻具相结合衍生的各种钻具，简要介绍了这一技术的典型应用案例，总结归纳了其下一步发展方向和技术难点，以期普及液动锤的应用，促进液动冲击回转钻进技术的进步。

Abstract:

Among various drilling methods， hydraulic impact rotary drilling is characterized by its high efficiency， good quality， long cycle times， few accidents， and low costs. The hydraulic down-hole hammer is the technological core of hydraulic impact rotary drilling. This article organizes the structural features of various hydraulic down-hole hammers and explores the various drilling tools which derived from the combination of hydraulic down-hole hammers， wireline coring and downhole motor drilling tools. The typical application cases of this technology are briefly introduced， and the the future development direction and technical challenges are also summarized in order to popularizing the application and promoting the advancement of hydraulic impact rotary drilling technology.