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鑽桿在岩心鑽探中具有很大的功用,必须熟悉与掌握其在工作中的应力状态与变化规律,从而确定其允许傅递的最大轴心压力与廻转数,以便更有效的发挥它的全部工作能力,提高鑽进效率。
Drill pipe in the core drilling has a great function, we must be familiar with and master the stress state in the work and changes in order to determine its maximum allowable Fu axial pressure and rotation speed in order to more effectively play it All working ability, improve drilling efficiency.