large hole drilling的意思|示意

Strong plus pressure, strong elevation force, large output torque and strong drilling capacity can satisfy the demand for deep hole drilling.

加压力大、提拔力大、输出扭矩大，钻探能力强，能满足深孔钻探的需要。

For the extended well, high angle drilling, horizontal drilling and deep well drilling, or in the well section of large dogleg severity, or the long open hole, casing wear often happens.

在大位移井、大斜度井、水平井和深井钻井中，或者在狗腿严重度较大的井段，或者在技术套管下入后的长裸眼钻井过程中，常常出现套管磨损问题。

The entering-rock problem of pouring pile through large-diameter hole drilling is always the biggest difficult problem in the fundamental construction of Guangxi.

大口径钻孔灌注桩的入岩问题，历来是广西基础施工中的一大难题。