... bottom hole flow bean 井底喷嘴 bottom-hole flow field 井底流场 level hole rotary flow 水平旋转空腔环流 ...
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PD C水力参数的不同综合表现为井底流场能量的变化。
Different combinations of PDC drilling bits hydraulic parameters are comprehensively reflected by flow field energy transformation at oil well bottoms.
分析了流场的总体特点，得出了喷嘴孔径对PDC钻头井底流场的各种影响。
The overall characteristics of flow field are analyzed and various influences of nozzle diameter on the downhole flow field of PDC bits are obtained.
通过改变喷嘴入口压力、钻头保径宽度、喷嘴直径等影响因素，来研究井底流场的变化。
By changing the nozzle inlet pressure, drill gage width, nozzle diameter factors, to study the changes in these flow fields.
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