Its drilling speed and service life are 70 % or more.

在钻井工业中,钻速和使用寿命都70%以上.

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The experiment shows the technique possessing high core recovery rate and quick drilling speed.

试验表明,该技术方法具有岩芯(样)采取率高、钻进速度快的特点.

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The main factors affected on the drilling speed of drilling method are rock - cutting and mud discharge.

影响钻井法钻进速度的因素主要有破岩和排渣.

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In the basis of parameters alternated in full - scale bit testing a drilling speed model was built.

根据室内全尺寸钻头台架变参数试验建立钻速模型.

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