HIGHLIGHTS
- What: This study provides theoretical guidance for enhancing debris removal efficiency in large-diameter reaming drilling. This study explored the flow field variations within the bottom-hole flow field and the return channel flow field, as well as the transient flow field changes within the debris discharge pipe during the reverse circulation process. The main reason is that in the initial stage of the flow field, the rotation has a minor impact on the flow field. By recording the transport trajectories of rock cuttings at the bottom of the hole and analyzing their movement patterns, the authors . . .
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