The core drilling method and the obtained achievement are introduced with respect to the bit and core barrel used in different formation.
根据不同地层所采用的钻头和取心器，介绍了不同地层的钻进取心方法和取得的成果。
To use different core drilling method in different geological environments can ensure the smooth progress of geological exploration work.
在不同的地质环境中，使用不同的岩心钻进方式，可以保证地质勘探工作的顺利进行。
The central sampling drilling is a new method which has the characteristics of efficient, accurate sampling and high percentage recovery of Core.
中心取样钻探是一种全新的钻探方法，具有效率快、取样准确、岩样采取率高的特点。
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