摘要
在分析硬岩地层中采用潜孔锤钻进基础上,重点从多头潜孔锤组合形式,对比了环状取心或全断面破碎孔底过程,并对大直径硬岩取心方法和HC型环状潜孔锤取心实钻试验作了简要介绍。
The broken processes of borehole bottom rocks under annulus coring or full face drilling, while various arranging patterns of multipieces down hole hammers are used, are compared based on the analyses of drilling in hard rocks by down hole hammers. The larger diameter coring method and the case study of coring by down hole hammers patterned in HC annulus are also introduced.
出处
《探矿工程》
2003年第3期26-29,共4页
Exploration Engineering(Drilling & Tunneling)
关键词
大直径
多头组合式潜孔锤
聚能爆破
环状取心
large diameter
multi-pieces down hole hammer
energy concentration burst
annulus coring
