摘要
钻杆折断是绳索取心钻进过程中经常发生的事故。利用ANSYS软件对深孔减压钻进时绳索取心钻杆进行了静力分析和屈曲分析,并采用VC++6.0软件开发工具编写了可视化的"绳索取心钻杆应力仿真电算"程序。结果表明:钻杆柱应力分布受钻杆规格和扭矩影响较大,受钻压影响较小。钻杆柱最大应力分布在顶部,随着钻杆长度的增加逐渐减小,至中合点后又逐渐增大;随着屈曲阶数的升高,钻杆柱的屈曲纵向变形越来越剧烈,而横向变形幅度却呈现波动状态。在距离孔口40 m内,各阶应力由大变小并逐渐稳定;在距离孔口40-1 250 m时,钻杆柱各阶应力相似;在距离孔口大于1 250 m时,钻杆柱应力变化随屈曲阶数增大越来越剧烈。仿真电算结果与有限元结果相符,验证电算程序可行。
Drill pipe fracture occurs frequently in the process of wire-line coring drilling. The static analysis andbuckling analysis of the wire-line coring drill pipe were studied for deep-hole decompression drilling based on AN-SYS software. A visualization program for wire-line coring drill pipe stress simulation and calculation was written byVC＋＋ 6.0 software development tools. Calculation results show that the stress distribution of the drill pipe is mostlyaffected by the specification of drill pipe and torque, and the drill pressure has less influence on it. The maximumstress is on the top of drill pipe, decreasing gradually with the increase of the length of drill pipe, and increasing a-gain gradually after the middle point; with the rise of buckling order, the vertical buckling deformation becomesmore and more obvious, while the lateral deformation extent appears wavy state. Within 40 m away from the hole,the stress of every order begins to decrease and becomes stable gradually; within 40-1 250 m away from the hole,the stress of every order is similar to each other; at the distance more than 1 250 m away from the hole, the changeof drill pipe stress becomes more and more obvious with the increase of buckling order. The simulation is consistentwith the finite element analysis result, verifying the feasibility of the program.
出处
《应用科技》
CAS
2016年第3期75-81,共7页
Applied Science and Technology
基金
中国地质调查局项目(GZHL20110320
GZHL201400303)
关键词
绳索取心
VC++6.0
ANSYS
钻杆折断
应力分析
深孔钻进
有限元分析
wire-line coring drilling
VC ＋ ＋6.0
ANSYS
drill pipe fracture
stress analysis
deep-hole drilling
fi-nite element analysis
作者简介
苏凯（1992-），男，硕士研究生；通信作者：苏凯，E—mail：sukail4@mails．jlu．edu．cn．
孙友宏（1965-），男，教授，博士．
