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.
对其安放位置及井喷压力进行了简要分析和探讨，建立了钻头压降与流量、流体密度的关系曲线。
The laying position and well blowout pressure are analyzed and discussed briefly and the relationship curve of drill bit pressure drop vs flowrate and fluid density i.
该方法能快速优选钻头类型，使地层孔隙压力的计算与实测误差小于10 %。
The method could let us to select the drilling bit rapidly and make the deviation between the porosity pressure calculation and the real measure less than 10%.
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