隔水管接头密封圈有限元分析

A finite element analysis of the sealing ring of the riser joint

针对海洋石油开采不断向超深水发展,隔水管长度增加导致钻井液压力急剧增大的问题,对隔水管接头密封展开研究。以隔水管接头主管和辅助管线密封圈为研究对象,利用大型有限元分析软件ABAQUS建立其密封有限元模型,对密封圈在不同工作压力下的变形与受力情况进行了分析研究。结果表明,随着工作压力的增加,主管和辅助管线密封圈的接触应力都相应增加,辅助管线密封的应力峰区位置随工作压力的变化而变化;随着工作压力的增加,密封圈的最大剪切应力增大。分析结果可为隔水管接头密封圈的优化设计提供参考。

Offshore petroleum recovery is constantly developing toward ultra deepwater and the increase of the riser length leads to the rapid increase of the drilling fluid pressure. Considering this problem, the sealing design of the riser joint was studied. Taking as the object of study the sealing ring of the main pipe of the joint and that of the auxiliary pipeline, the large-scale finite element analysis software ABAQUS was used to establish the finite element model of its sealing. The deformation and force condition of the ring under different operating pressures were studied. The result shows that the contact stress of the sealing ring of the main pipe and the auxiliary pipeline will increase with the increase of operating pressure. The stress peak zone of the auxiliary pipeline sealing changes with the operating pressure in position. The maximum shear stress of the ring increases with the increase of operating pressure. The analysis can provide a reference for the optimized design of the ring.