RESEARCHE ON THE INFLUENCE OF NOZZLES WITH DIFFERENT DIAMETERS ON FLOW FIELD OF   PDC BITS

Abstract

Abstract: The flow field of PDC bits is very complicated during drilling process, while optimizing its hydraulics parameters is an effective method to improve its drilling performance. According to the actual structure of the bits, flow field models for the PDC bits which have four nozzles with different diameters are established and then numerically simulated. The general features of the flow field are analyzed and the influences of nozzles with different diameters on flow field of PDC bits under the conditions of same outlet velocity and same flux are obtained, thus provide some guidance for hydraulic design of PDC bits.

Key words: Nozzle, Numerical analysis, Flow field, PDC bits

CLC Number:

TG156

Yang Li;Chen Kangmin. RESEARCHE ON THE INFLUENCE OF NOZZLES WITH DIFFERENT DIAMETERS ON FLOW FIELD OF PDC BITS[J]. , 2005, 41(9): 171-174.

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RESEARCHE ON THE INFLUENCE OF NOZZLES WITH DIFFERENT DIAMETERS ON FLOW FIELD OF PDC BITS

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