Experimental and Numerical Study on Air Flow Behavior for a Novel Retractable Reverse Circulation Drill Bit of Casing-while-Drilling (CwD)

<div>Influence of inner jet nozzles on the drill bit flow field: (a) the magnitude velocity of the air jet in the inner jet nozzles and (b) the static pressure distribution along the central axis of the drill bit.</div>

Geofluids

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Figure 10

Figure 10: Experimental and Numerical Study on Air Flow Behavior for a Novel Retractable Reverse Circulation Drill Bit of Casing-while-Drilling (CwD) 

Figure 10 | Experimental and Numerical Study on Air Flow Behavior for a Novel Retractable Reverse Circulation Drill Bit of Casing-while-Drilling (CwD) 