CAJ | 학술논문

根据动量守恒和钻柱力学的基本理论,建立了气体钻井三维弯曲井眼钻柱动力学模型和钻柱与井壁接触碰撞模型;提出了一种求解钻柱与井壁接触非线性有限元方程的元胞自动机算法.该方法具有编程简单、收敛速度快等优点,以实际工况为例进行仿真模拟,选取有代表性节点的仿真计算结果并加以分析.仿真结果表明:该方法较好地解决了三维弯曲井眼中钻柱与井壁接触碰撞的复杂边界条件问题,在解决气体钻井钻柱与井壁接触非线性问题的研究中具有良好的应用前景.
근거동량수항화찬주역학적기본이론,건립료기체찬정삼유만곡정안찬주동역학모형화찬주여정벽접촉팽당모형;제출료일충구해찬주여정벽접촉비선성유한원방정적원포자동궤산법.해방법구유편정간단、수렴속도쾌등우점,이실제공황위례진행방진모의,선취유대표성절점적방진계산결과병가이분석.방진결과표명:해방법교호지해결료삼유만곡정안중찬주여정벽접촉팽당적복잡변계조건문제,재해결기체찬정찬주여정벽접촉비선성문제적연구중구유량호적응용전경.
The drill string dynamics model and the contact collision model of drill string and wellface in three-dimensional flexural wellbore in the gas drilling are established,according to the momentum conservation and the theory of drill string mechanics.This paper proposes a new cellular automata method for contact nonlinear finite element equations of drill string and wellface.The method has advantages of simple programming and converges fast,the actual working conditions are simulated and the simulation results of representative nodes are analyzed.It is shown that the method can be used to solve the complex boundary value problems of contact collision of drill string and wellface in the three-dimensional flexural well.