torque and drag

基本解释

Torque and drag in extended-reach well greatly impact on the efficiency of drilling.
大位移井钻井的摩阻和扭矩严重影响钻井时效。
The buckling will easily occur while drilling, so it is necessary to calculate the buckling during calculating the torque and drag of string.
钻进过程中钻柱很容易发生屈曲，在进行钻柱摩阻扭矩分析时，考虑钻柱的屈曲很有必要。
d.wanfangdata.com.cn
The beam-column theory was applied to calculate the torque and drag in BHA section, and the mini-element analysis was used in uper BHA section.
对BHA以上井段，用微单元力平衡分析法具体分析钻柱的受力，给出不同工况下水平井摩阻力计算的简化条件。