The compound drilling mechanism of turbodrill is elaborated in detail after analyzing the characteristics of turbodrill and coordination requirements for PDC bits.
从涡轮钻具的特
和PDC钻头配合要求着手，
述了涡轮钻具复合钻
的机理；
The compound drilling mechanism of turbodrill is elaborated in detail after analyzing the characteristics of turbodrill and coordination requirements for PDC bits.
从涡轮钻具的特和PDC钻头配合要求着手，述了涡轮钻具复合钻的机理；
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