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。
This method properly determined the sample quantity to make core drilling amendment with the confidence degree and precision estimate theory of error theory.
在该方法中，利用误差理论中的置信度和估计精度理论，合理确定钻芯修正所需要的芯样数量。
Paper is divided into two parts, core drill equipment and mud system. Through theoretical analysis to experimental method to complete the design of core drilling and mud system.
论文分为取心钻具和泥浆两部分，通过理论分析到实验的方法来完成取心钻具的设计与泥浆体系的建立。
Mechanical method is a category of measuring residual stress. In the category, hole-drilling method, ring-core method and dissecting method are commonly used.
机械法是测残余应力的一类方法，其中常用的有盲孔法、环芯法和剖分法。
Mechanical method is a category of measuring residual stress. In the category, hole-drilling method, ring-core method and dissecting method are commonly used.
机械法是测残余应力的一类方法，其中常用的有盲孔法、环芯法和剖分法。
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