摘要
分析了硬、脆、碎、坍、漏复杂地层钻探施工的难题，结合地质岩心勘探特点和要求，研制了气动贯通式潜孔锤反循环连续取心（样）钻具系统，通过生产性试验取得显著的经济效益和社会效益。
The atical analysis the drilling problems which happened in the complicated formations,such as hard leakage brokenbrittle and collapsible formations.Combine with the demands and characteristics of the exploration core drilling,the hollow-stem DTH hammer and reverse circulation sampling system have been developed. Theough the field test,remarkable economical and social effects have been achieved.
出处
《地质与勘探》
CAS
CSCD
北大核心
1996年第3期55-60,共6页
Geology and Exploration
关键词
贯通式潜孔锤
反循环连续取心
钻具
hollow-stem DTH, dual─ wall drilling rod,coring(sampling)continuously with reverse circulation
