When placed near the bit, the traditional second rathole reaming run is eliminated, wellbore conditions are improved, and casing can be run that much faster.
当安放在离钻头较近的位置时，无需常规的第二趟钻进行口袋扩眼，井眼条件可得到极大的改善，套管可以更快下到位。
The reaming drill bit in slim hole is a key tools of re-drilling in existing well.
小井眼扩孔钻头是老井重钻的关键设备。
The reaming drill bit in slim hole is a key tools of re-drilling in existing well.
小井眼扩孔钻头是老井重钻的关键设备。
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