摘要
介绍了能适应煤田地质勘探的双壁钻杆和其他配套器具,以及反循环潜孔锤钻进在煤田中的试验效果。
In this paper, the authors described the self-de-signed double-tube rod and other necessary accessories available to coal geological exploration for the field working team, and showed the testing results of the reverse circulation downhole drilling in coalfields.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
1991年第2期56-58,共3页
Coal Geology & Exploration
