CAJ | 학술논문

钻井过程中钻杆柱的高速涡动会引起钻杆柱与井壁的随机碰撞。为了有效预测与控制钻杆柱与钻头在井下的运动规律，建立了符合实际工况的井下多体钻柱系统固液耦合有限元模型，分析了钻井液对钻柱系统瞬态动力学特性仿真结果的影响。研究结果表明：钻柱在钻井液的作用下横向振动减弱、与井壁发生碰撞的次数减少。为进一步阐明钻柱运动规律、预测和控制井眼轨迹奠定了基础。
찬정과정중찬간주적고속와동회인기찬간주여정벽적수궤팽당。위료유효예측여공제찬간주여찬두재정하적운동규률，건립료부합실제공황적정하다체찬주계통고액우합유한원모형，분석료찬정액대찬주계통순태동역학특성방진결과적영향。연구결과표명：찬주재찬정액적작용하횡향진동감약、여정벽발생팽당적차수감소。위진일보천명찬주운동규률、예측화공제정안궤적전정료기출。
A high speed whirl of drill pipe in the drilling process caused random collisions of drill pipe against the wall.In order to effectively predict and control the motion law of drill pipe and the drill bit in the underground,the coupled finite element model of the solid-liquid is established for the down hole drill string multi-body system,Analysis of the drilling fluid on the transient dy-namics simulation results of drill string system is carried out.The results show that:under the effect of the drilling fluid,the drill string’s lateral vibration weakened and its vibration accelera-tion and amplitude were decreased at different level,these established the foundation for further elucidate the movement of the drill string,and predict and control the well trajectory.