ABSTRACT

The motion of the floating platform is one of the important factors influencing the safety of testing string. The allowable motion limits of various floating drilling platforms are discussed and their calculation formulas are presented, based on which the nonlinear dynamic response characteristics of the testing tube are investigated through ABAQUS software. Results show that an excessive offset of floating platform will cause many problems to testing tube, such as operation difficulty in rising and landing pipe string, disconnection difficulty of testing tree in case of emergency. Under heave motion and slow drift motion condition, the maximum Mises stress appears in the part closed to the upper end. The heave and horizontal motions of the platform have a superposition influence on the axial force of the pipe. So, a more precise dynamic theoretical model should be developed to study the longitudinal-transverse coupled vibration of testing string in the future.

摘要

浮动平台的运动是影响测试管柱安全的重要因素之一。讨论了各种浮动钻井平台的允许运动极限并给出了计算公式，并在此基础上通过ABAQUS软件研究了试管的非线性动力响应特性。结果表明，浮动平台过大的偏移会给试管带来很多问题，如升降管柱操作困难，紧急情况下试树断开困难等。在垂荡运动和慢漂运动条件下，最大Mises应力出现在靠近上端的部分。平台的升沉和水平运动对管道的轴向力有叠加影响。所以，