PDF Bit nozzle erosion - Possible causes

Hello Team,

working in Gabon one of our Smith 12 1/4 PDF bit nozzles washed out, between a 1/4 to more than 1/2 increase in flow area, it is a smooth increase in OD.

The bit has 10 nozzles in total, one nozzle is almost completely washed out, the others washed out at differend degrees.

No erosion on the rest of the body
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