By using the surge pressure calculating method, in this paper the formulas have been derived which are used to calculate the maximum allowable velocity in pulling and running pipe in borehole.
本文根据波动压力计算方法推导出了最大许用起钻速度和下钻速度的计算公式。
Then the preparation of magnetic immobilized beds was investigated theoretically and experimentally, such as the force balance, the control of packing length and the allowable velocity of flow.
对磁性固定柱的制备条件，如受力平衡分析、柱长度的控制、最大耐受流速等进行了理论分析和实验模拟；
Then the preparation of magnetic immobilized beds was investigated theoretically and experimentally, such as the force balance, the control of packing length and the allowable velocity of flow.
对磁性固定柱的制备条件，如受力平衡分析、柱长度的控制、最大耐受流速等进行了理论分析和实验模拟；
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