绳索取心满眼管柱的力学模型优化与应用  

OPTIMIZATION AND APPLICATION OF MECHANICAL MODEL OF WIRE CORING STRING WITH PACKED HOLE ASSEMBLY

作　　者：潘德元[1] 贺前平 蔡隽 王杰[1] 方国庆 曾昊 PAN Deyuan;HE Qianping;CAI Jun;WANG Jie;FANG Guoqing;ZENG Hao(Changsha Natural Resources Comprehensive Survey,China Geological Survey,Changsha 410600,China)

机构地区：[1]中国地质调查局长沙自然资源综合调查中心,长沙410600

出　　处：《力学与实践》2023年第3期585-591,共7页Mechanics in Engineering

基　　金：中国地质调查局资助项目(DD20208007,DD20230398)。

摘　　要：为了解决常规绳索取心钻具结构防斜能力低、钻孔轨迹控制差的问题,本文基于经典管柱力学的纵横弯曲连续梁理论,优化了孔底钻具的力学模型:将取心钻头与下扩孔器间视为钻头整体,而不作为第一跨;将稳定器间距小于切点跨距的管柱视为刚体。在此基础上提出了提高钻具防斜和钻孔轨迹控制的管柱结构模型,并通过钻探施工验证得出,管柱结构模型的理论防斜效果和实际钻孔轨迹变化情况相吻合,这为提高绳索取心钻孔质量提供了有效的理论指导。In order to solve the problems of low anti-slope ability and poor drilling trajectory control of conventional wire-line core drilling tools structure,this paper optimizes the mechanical model of drilling tools assembly at the bottom of the hole based on the longitudinal and horizontal bending continuous beam theory of classical pipe column mechanics:the core drilling bit and the lower reamer are regarded as the whole of the drill bit,but not as the first span;the pipe column whose stabilizer spacing is smaller than the span of the tangent point is regarded as a rigid body.On this basis,a structural model of the pipe column to improve the deflection resistance and trajectory control of the drilling tool is proposed,and verified by drilling construction,it is concluded that the theoretical anti-slope effect of the pipe column structural model and the actual drilling trajectory change match with each other,which provides an effective theoretical guidance to improve the quality of wire-line core drilling.

关 键 词：纵横弯曲梁 绳索取心钻进 孔底钻具组合 三弯矩方程 

分 类 号：P634.7[天文地球—地质矿产勘探]