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取样钻进是用一种超小型的岩心钻机进行钻进取样。因为该类钻机体积小，重量轻，搬迁安装容易，并能较迅速地穿过地表覆盖，采取浅部岩层或土层的样品，特别适合于运输困难和交通不便地区进行普查和找矿工作。世界各先进工业国家，在普查找矿中，都比较广泛地采用了这一手段，并取得了比较好的效果。据不完全统计，目前，有关国家研制和生产的五米以下的取样钻约三十余种，五至三十米的四十多种，三十至七十米的三十多种。型式多样，品种齐全，可以根据不同深度、口径、取样要求及岩层特点等选用。
Sampling is a very small core drill rig drilling sampling. Because of their small size and light weight, they are easy to move and install and can cross the ground surface more quickly. Samples taken from shallow rock formations or soil layers are especially suitable for census and prospecting work in difficult transportation and traffic inconvenience areas. All the advanced industrial countries in the world have adopted this measure more widely in census prospecting and achieved good results. According to incomplete statistics, at present, there are more than 30 kinds of samples below five meters developed and produced by the countries concerned, more than 40 kinds ranging from 5 to 30 meters and more than 30 kinds ranging from 30 to 70 meters. Diverse styles, the full range, according to different depths, caliber, sampling requirements and rock characteristics such as selection.