کلمه jet bit یافت شد:
n: a drilling bit having replaceable nozzles through which the drilling fluid is directed in a high-velocity stream to the bottom of the hole to improve the efficiency of the bit. See bit.
n: a drilling bit that has replaceable nozzles through which the mud is circulated.the high velocity of the mud leaving the nozzles improves drilling efficiency.
مته ی فواره یی
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