公开(公告)号：US4691788A

公开(公告)日：1987-09-08

申请号：US751735

申请日：1985-07-03

申请人： Shoji Yoshida ,  Yasuhiko Haru ,  Etsuji Kosaka ,  Toshimichi Ikeda ,  Mikio Aoyama ,  Takeo Iida

发明人： Shoji Yoshida ,  Yasuhiko Haru ,  Etsuji Kosaka ,  Toshimichi Ikeda ,  Mikio Aoyama ,  Takeo Iida

IPC分类号： E21B7/00 ,  E21B7/04 ,  E21B19/20

CPC分类号： E21B7/005 ,  E21B19/20 ,  E21B7/046

摘要： A lateral hole boring method whereby a lateral hole of a desired length is formed underground by repeatedly performing the following steps. A vertical hole is prepared, and a lateral hole boring apparatus equipped with a leading auger of a smaller length than the diameter of the vertical hole is lowered into the vertical hole to a predetermined position. The apparatus is manipulated from the ground level to advance and rotate the leading auger to bore a lateral hole. When the lateral hole has reached a predetermined length commensurate with the length of the leading auger, the advance movement of the leading auger is stopped, and the lateral hole boring apparatus is manipulated from the ground level to detach the leading auger therefrom, and is lifted above the vertical hole while leaving the leading auger in the lateral hole. A coupling auger of a smaller length than the diameter of the vertical hole is attached to the lateral hole boring apparatus outside the vertical hole, and the apparatus is lowered into the vertical hole again. Then, the lateral hole boring apparatus is manipulated from the ground level to couple the coupling auger to the leading auger left behind in the lateral hole.

摘要翻译： 一种侧孔钻孔方法，通过重复执行以下步骤，在地下形成所需长度的侧孔。 准备了垂直孔，并且配备有比垂直孔的直径小的长度的前导螺旋钻的侧孔钻孔装置被下降到垂直孔中到预定位置。 该装置从地面操纵以前进并旋转前导螺旋钻以钻出一个侧孔。 当侧孔已经达到与前进螺旋推运器长度相当的预定长度时，先导螺旋钻的前进运动停止，并且侧钻孔装置从地平面被操纵以从其上拆下引导螺旋推运器，并被提升 在垂直孔的上方，而将前导螺旋钻留在侧孔中。 与垂直孔的直径相比较小的连接螺旋钻被附接到垂直孔外侧的侧孔钻孔装置，并且装置再次下降到垂直孔中。 然后，从地平面操纵侧孔钻孔装置，以将联接螺旋钻联接到在侧孔中留下的前导螺旋钻。