By analyzing the results of the tests, a penetration rate mode is derivated. The mode could be modified upon field drilling conditions and casing programme.

通过对试验结果的统计分析，得到用声波时差表示的钻速模式，若用于现场预测钻速时，还须根据钻井条件和井身结构对钻速模式进行修正。

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By analyzing the results of the tests, a penetration rate mode is derivated. The mode could be modified upon field drilling conditions and casing programme.

通过对试验结果的统计分析，得到用声波时差表示的钻速模式，若用于现场预测钻速时，还须根据钻井条件和井身结构对钻速模式进行修正。

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