? Question: Good afternoon. What is the number of bits in EGG? How is created a differential pressure of EGG?

✎ Answer:The number of nozzles on EGG depends on the diameter of EGG and bits and ranges from 3 to 8 pieces Differential pressure of EGG with a chisel is created by the selection of bit nozzles to create differential pressure on the bit and EGG not less than 3.0 MPa. At this pressure drop, the performance of the drill bit ( mechanical drilling speed and penetration on the bit) up to 20 %. With increasing pressure drop, the performance of bit grow almost linearly.



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