金刚石绳索取心钻杆接头螺纹的优化研究  

Optimization of the Joint-Thread of Diamond Wire-Line Coring Drill Pipe

作　　者：苏继军[1] 殷琨[1] 郭同彤 

机构地区：[1]吉林大学建设工程学院,吉林长春130026 [2]贡比涅技术大学,法国贡比涅60200

出　　处：《吉林大学学报（地球科学版）》2005年第5期677-680,共4页Journal of Jilin University：Earth Science Edition

基　　金：中国地质调查局项目(200220170007);高等学校博士学科点专项科研基金项目(20030183024)

摘　　要：金刚石绳索取心是一种高效优质、快速经济、应用广泛的钻探技术。我国绳索取心钻杆螺纹强度低,使用寿命短,钻杆折断事故时有发生,不能满足深孔钻进的需要。以接触非线性有限元理论为基础,运用大型通用有限元分析软件研究了钻杆接头螺纹螺距及螺纹长度等参数对螺纹强度的影响规律,并实现了对螺距和螺纹长度等的优化。研究结果表明,适当增大螺距及螺纹总长度,可以有效改善接头螺纹内部的应力分布状态,优化后的接头螺纹整体强度提高约15.4%。Diamond wire-line coring drill is a kind of widely used drilling technology with the advantages of high quality, efficiency and economic. But the thread of wire-line coring drill pipe made in our country is low strength and short service life. Drill pipe break trouble occurs constantly and it can＇t fulfill the requirements of deep hole. Based on the nonlinear finite element theory, the effect of thread span and joint-thread length of drill pipe on the strength of thread are studied by the application of large-scale finite element analysis software. At the same time, optimization of thread span and thread length has been completed. The research results show that the stress distribution in the inner part of joint-thread can be improved and the joint-thread strength of drill pipe can be increased by 15.4% through enlarging the thread span and joint-thread length of drill pipe.

关 键 词：钻杆 螺纹 有限元 

分 类 号：P634.5[天文地球—地质矿产勘探]