井下多分枝定向孔的技术和经济效果

Underground Multi-branched Directional Hole Drilling Technique and Its Economical Benefits

文中综合了部分苏联资料,说明井下运用多分枝定向钻进取得的技术和经济效益.

Consulted a number of relevant information from the Soviet Union, the author gives an account ofthe underground multibranched dire-ctional hole drilling technique in this paper. It is shown that byusing this technique a great economical benefit could be achieved.