破碎带取心钻进技术

Coring Drilling Technology in Fracture Zone

摘要:

云南省兰坪县中排乡李子坪铅锌矿详勘施工中，由于地层破碎带较发育，采用绳索取心钻进岩心采取率仍很低，无法满足设计要求。通过设计导流底喷钻头及相应的冲洗液，调整钻进参数等技术措施，取得了较好的效果，确保了工程质量。

Abstract:

In the detailed exploration of Liziping lead-zinc mine in Yunnan Province, because the formation fracture zone is developed, the core recovery rate is very low by using the wire-line coring drilling, which can not meet the design requirements. By the technical measures of design of diversion bottom jetting drill bit and the supporting flushing fluid and adjustment of drilling parameters, good results were achieved to ensure the engineering quality.