Experimental and Numerical Analysis of Flow Behavior for Reverse Circulation Drill Bit with Inserted Swirl Vanes

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2022/2472280/figures/2472280.fig.003a.svgz" name="2472280.fig.003a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Swirling drill bit structure</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2022/2472280/figures/2472280.fig.003b.svgz" name="2472280.fig.003b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Working principle</td></tr></table>

<div>Swirling drill bit. 1: carbide inserts; 2: lower drill bit body; 3: upper drill bit body; 4: swirler; 5: sealing; 6: flushing nozzles; 7: inner suction nozzles; 8: spiral blade.</div>

Geofluids

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Figure 3

Figure 3: Experimental and Numerical Analysis of Flow Behavior for Reverse Circulation Drill Bit with Inserted Swirl Vanes 