世界上一些主要工业国家,对金刚石钻探所用的钻具(包括钻头、扩孔器、岩心管、套管和钻杆等)都标准化系列化了.因此,了解和掌握国外的标准系列,对于我们参阅国外样本、技术资料,以及研究设计金刚石钻具和设备,都是十分有用的.尤其是使用引进的钻探设备和钻具时,就更有必要掌握它.目前各国常用的金刚石钻探钻具标准,基本上分为英制和公制的两大类,现简介如下:一、英制标准英制长度单位是英尺、英寸,重量单位是磅.美、英、加拿大和澳大利亚等国均采用英制(西德、比利时和 Some of the major industrialized countries in the world have standardized the series of tools used for diamond drilling, including drill bits, reamers, core tubes, casing and drill rods, etc. Therefore, knowing and mastering the standard series abroad, See foreign samples, technical information, and research and design diamond drilling tools and equipment, are very useful .Especially the use of imported drilling equipment and drilling tools, it is even more necessary to master it.Nowadays, diamond drilling tools commonly used in various countries standards , Basically divided into two major categories of imperial and metric, are summarized as follows: First, the British standard inch length units are feet, inches, weight units are pounds. The United States, Britain, Canada and Australia and other countries are using the British system (West Germany, Belgium and