目前我国各油田使用各种类型的美国钻头。为了掌握各类钻头的特点及适应地层,以便合理选型与使用,我们收集了美国休斯、史密斯、瑞德及赛克瑞特四家公司的产品目录、钻头手册及钻头设计手册等有关资料,对各公司现有钻头类型、符号意义作以较详细介绍。 At present, all kinds of American drill bits are used in various fields in our country. In order to grasp the characteristics of all kinds of drill bits and adapt to the strata so as to reasonably select and use them, we have collected the catalogs, drill handbooks and bit design manuals of the four companies of Hughes, Smith, Reid and Saikreit in the United States , The company’s existing bit type, symbolic meaning for a more detailed introduction.