现在，中半径水平井钻井技术是最常用的水平井钻井技术。
Today, the medium radius drilling technique is the most commonly used drilling method.
在1985年，第一口的中半径水平井采用井下泥浆马达技术钻成。
In 1985, the first medium radius horizontal well was drilled using a down-hole mud motor.
通过对钻井过程中泵压、张力变化及机械钻速的分析，指出了超短半径侧钻水平井钻井技术存在的主要问题。
Based on the analysis of pump pressure, tension variation, and drilling speed, the existing problems of ultra-short radius side tracking horizontal well were presented.
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