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

<div>Influence of suction channel on air flow inside the drill bit: (a) air suction effect during the simulation and experiment and (b) mass flow of air through the suction channel.</div>

Geofluids

fig11

Figure 11

Figure 11: Experimental and Numerical Study on Air Flow Behavior for a Novel Retractable Reverse Circulation Drill Bit of Casing-while-Drilling (CwD) 

Figure 11 | Experimental and Numerical Study on Air Flow Behavior for a Novel Retractable Reverse Circulation Drill Bit of Casing-while-Drilling (CwD) 