摘要
遇水坍塌复杂层用常规绳索取心钻具钻进效果不好。文中介绍了用带附加水眼钻头顺利钻过复杂层的经验,并讨论了水眼的功能。
Some complex rock formations are easy to be collapsed in drilling when lashed by water. No good result of drilling with conventional wire-Ine coring drilling tools could be obtained. A specially made drilli bit attached with side-holes for water draining will meet the requirement in this circumstance. In this paper the functions of such drill bit ale discussed and practical experience is summed up.
出处
《地质与勘探》
CAS
CSCD
北大核心
1989年第8期63-64,共2页
Geology and Exploration
