CAJ | 학술논문

石油套管在井下受力复杂,其螺纹连接是套管的薄弱环节。在目前发现的套损中有很大的比例是由螺纹连接失效造成的,因此真实地模拟井下受力情况,并且准确的测出在不同工况与螺纹部位的应力应变场的关系,对研究套管螺纹连接的极限承载能力,保护套管,保证油田正常生产具有十分重要的意义。文章采用ANSYS软件提供的子模型方法,通过有限元分析方法研究套管螺纹受力状况及变形情况,模拟井下复杂工况环境对套管螺纹的影响,优化螺纹结构,使应力分布更加合理。
석유투관재정하수력복잡,기라문련접시투관적박약배절。재목전발현적투손중유흔대적비례시유라문련접실효조성적,인차진실지모의정하수력정황,병차준학적측출재불동공황여라문부위적응력응변장적관계,대연구투관라문련접적겁한승재능력,보호투관,보증유전정상생산구유십분중요적의의。문장채용ANSYS연건제공적자모형방법,통과유한원분석방법연구투관라문수력상황급변형정황,모의정하복잡공황배경대투관라문적영향,우화라문결구,사응력분포경가합리。
Oil Casing is important to oil drilling equipment.Oil pipe in the underground stands complex stress,so oil casing pipe thread connection is the weak link.In the current,a large proportion of damage in the casing is caused by the failure of threaded connections.Realistic simulating the forces underground and accurately measuring the relationship between different conditions and stress or strain fields in threads are important.It is significant to study the limit of carrying capacity of casing thread connection,protecting the casing,and ensuring normal production of oil.Stress Analysis of casing threads are senior non-linear finite element contact problems,so we generally use special nonlinear analysis software.Based on researching the overall stress in the oil casing thread computation,the research is completed by sub-model method provided by ANSYS program.