钻探工程2025，Vol.52Issue(2)：28-37,10.DOI:10.12143/j.ztgc.2025.02.004
南方丘陵地区岩心钻探关键技术措施
Key technical measures of core drilling in hilly area of southern China
摘要
Abstract
In the process of a series of geological core drilling projects in the hilly areas of southern China,a number of technical difficulties have been encountered,including the karst cave crossing in the karst cavity area,the safe drilling in the lost return layer at the bottom of the well,the coring problem in the loose mudstone,sandstone and gravel layer,drilling difficulty in the water-sensitive formation,the stable drilling in the strong deflecting area,and the relocation difficulty in the deep cutting area.Therefore,the following technical measures were taken in response to the above difficulties:(1)the"double casing+half filling"method is taken to cross the karst caves,(2)the comprehensive technical measures of"top leakage+plugging+lubricating drilling tool";(3)the advanced coring with casing while drilling and multi-layer casing wall protection technology,and the special sampling drilling tool with aperture convergence and the telescopic leakage joint are innovatively applied,which significantly improves the core recovery rate,(4)a low solid-phase anti-sloughing flushing fluid and strengthening solid-phase control,reducing the rotation speed and back footage,as well as rapid casing support response to ensure the hole safety;(5)the calculation method based on the mechanical model of continuous beam wire-line coring drilling tool,and the measures of low pressure lifting,drilling rig foundation reinforcement and concentricity improvement are adopted to achieve the purpose of anti-deviation and straightening;(6)the efficient scheme using drones for relocation.The results of this paper provide an important reference for drilling construction under similar environment and complex geological conditions.关键词
岩心钻探/岩溶空腔/松散泥砂砾石层/水敏地层/强造斜地层/超前取心跟管钻进/光圈收敛式取样钻具/无人机搬迁Key words
core drilling/karst cavity area/loose mudstone,sandstone and gravel layer/strong water-sensitive formation/strong deflecting formation/the advanced coring with casing while drilling/sampling tool with aperture convergence/relocation with drone分类
天文与地球科学引用本文复制引用
蔡隽,王步清,王虎,王稳石,王杰,潘德元,贺前平,方国庆..南方丘陵地区岩心钻探关键技术措施[J].钻探工程,2025,52(2):28-37,10.基金项目
中国地质调查局地质调查项目"东部地区战略性矿产靶区查证技术支撑(长沙中心)"(编号:DD20242960) （长沙中心）
贵州省科技厅科技支撑计划"煤矿井下定向钻进轨迹动态控制技术"(编号:黔科合支撑[2022]一般245) （编号:黔科合支撑[2022]一般245）
