摘要
钻杆是回转钻进过程中必不可少的关键设备,虽然它结构看似非常简单,但实际上,在工作过程中,它承受着拉伸、扭转等相当复杂的外力,在加厚过渡区产生的应力集中现象,易诱发钻杆管体断裂,缩短钻杆寿命;为满足深井、超深井需求,提高钻杆使用寿命,在API NC50 5"钻杆的基础上,设计改进了近内平外加厚钻杆,通过UG NX6.0建立单根钻杆API及改进模型,运用Ansys Workbench13.0中的结构静力学模块,对其在减压钻进工况下的受力情况进行了分析对比。该改进钻杆加大了接头内径,降低了最大应力,改善了过渡区的应力分布。
Drill pipe is an essential part of Rotary drilling equipment.Although its structure is very simple, in fact, it is under complex external forces like tension and torsion during wark.Stress concentration caused in the upset transitional area can easily lead to the breaking of drill pipe body and shorten the life of drill pipe;to meet the needs of deep well or super-deep well,and improve the life of drill pipe;we design and improve internal flush and external upset drill pipe on the basis of API NC50 5.We establish a single API and improve model by using UG NX6.0.We analyze and compare the forces of drilling with structural static module.The improvement increases the diameter of joints,reduces the maximum stress,and improves the s tress dis trib ution of transition zone.
出处
《机械设计与制造》
北大核心
2012年第9期27-29,共3页
Machinery Design & Manufacture
