CAJ | 학술논문

采用有限元法开展气体钻井全井段钻柱的非线性动力学运动过程模拟研究。建立了某井全井段塔式钻具的三维模型和钻头与岩石以及钻柱与井筒之间的接触关系,分析了钻柱在动态钻进过程中的力学参数,得出气体钻井全井段钻柱的运动规律以及对钻柱寿命的影响。对气体钻井中钻柱力学、井斜控制等方面的深入研究具有指导意义。
채용유한원법개전기체찬정전정단찬주적비선성동역학운동과정모의연구。건립료모정전정단탑식찬구적삼유모형화찬두여암석이급찬주여정통지간적접촉관계,분석료찬주재동태찬진과정중적역학삼수,득출기체찬정전정단찬주적운동규률이급대찬주수명적영향。대기체찬정중찬주역학、정사공제등방면적심입연구구유지도의의。
Simulation study on non-linear dynamical movement of entire drilling string in gas drilling is carried out to adopt finite element method（FEM）.The 3D model of entire tapered drillstring and contact relation of bit-rock and drillstring-wellwall is established and the result of serial mechanic parameter is analyzed to get the rule of entire drillstring movement and the effect with fatigue life.The conclusion is useful to study drilling string mechanics and hole deviation in air drilling.