大口径深孔钻具选用原则及建议

Principle of Drilling Tools Selection for Large Diameter Borehole and the Suggestions

摘要:

为了适应深孔钻探的需要，减少孔内事故的发生，阐述了深孔钻具的选用原则，对钻铤、钻杆、转换接头、方钻杆的选用方法进行了具体介绍，并就经常遇到的钻柱切口问题、临界钻压和转速问题提出了建议，为施工单位进行合理的钻具选用和组合提供了参考。

Abstract:

The paper discussed the principle of drilling tools selection for deep hole to avoid downhole trouble; introduced the selection of drill collar, drill pipe, conversion joint and kelly; and put forward the reference suggestions to frequently encountered milling keyway in drill string, critical drilling pressure and rotating speed.