石油钻井中，把用于钻取岩心的钻头，习惯称取心钻头（在一般的岩心钻探中，则称钻头或岩心钻头）。取心钻头的种类很多，在结构上差别也很大，一般有牙轮取心钻头，刮刀取心钻头和筒状取心钻头，直接影响岩心采取率。
介绍了测定孕镶金刚石取心钻头各向异性指数的实验方法。
The experimental apparatus and methods for determining the anisotropic index of a diamond impregnated bit were introduced.
根据科学钻探对岩心的特殊要求，认为金刚石取心钻头是科学深钻取心钻进较理想的选择。
Diamond core bit is preferred for coring operation in terms of the special requirements of scientific drilling.
该工具主要由提升控制系统、安全接头、稳定器、内外筒、全闭式岩心爪和取心钻头等部件组成。
This kind of tools mainly consists of lifting control system, safety joint, stabilizer, inner and outer barrels, full-closed core catcher, and coring bit.
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