• nearly horizontal hole drilling - 引用次数：4

  For actual demand of nearly horizontal hole drilling of coal seam methane,the paper proposed a scheme of auto-orientation of jet stream of hydraulic correction combining with hydraulic correction technology and designed a correction system based on the scheme.

  根据煤层气近水平孔钻进的实际需求,结合水力纠偏技术,提出了一种水力纠偏射流自动定向方案,并在此基础上设计了一种纠偏系统。

  参考来源 - 近水平孔水力纠偏自动定向方案及其硬件实现
  subhorizontal drilling - 引用次数：2

  参考来源 - 煤层气近水平孔钻进原位探测与水力纠偏技术研究

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