Different combinations of PDC drilling bits hydraulic parameters are comprehensively reflected by flow field energy transformation at oil well bottoms.

针对实际PD C钻头建立了不同的流场计算模型，比较分析了流场能量的变化规律。

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Different combinations of PDC drilling bits hydraulic parameters are comprehensively reflected by flow field energy transformation at oil well bottoms.

PD C水力参数的不同综合表现为井底流场能量的变化。

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By dynamical drilling tools matching with PDC drilling bits, drilling rates are able to be increased greatly, drilling costs are decreased greatly, and the drilling cycles are shortened.

动力钻具配合PD C钻头钻井，可以大大地提高机械钻速、降低成本、缩短钻井周期。

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