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为合理设计深井中的钻柱结构，提高钻具寿命，防止井下断钻具事故，讨论了钻柱的纵向振动、横向振动、扭转振动及进动之间的相互耦合关系，并指出了钻柱振动的危害和减少振动的现场措施。介绍了两种研究钻柱振动动力学的方法──有限元法和机械阻抗法。经举例说明深井中大井眼小钻铤的危害性，认为大井眼小钻铤的环空较大，钻铤的刚度较弱，在轴向力作用下易屈曲，激发横向振动，且钻铤的横向变形较大，因振动引起的交变应力也较大；纵向振动易出现动力失稳而诱发横向振动，横向振动又易诱发扭转振动。建议使用大井眼大钻铤设计方案。
In order to reasonably design the drill string structure in deep well, enhance the life of drilling tool and prevent the accident of downhole drilling tool, the vertical coupling, transverse vibration, torsional vibration and precession of drill string are discussed. Vibration hazards and on-site measures to reduce vibration. Two methods to study the vibration dynamics of drill string are introduced - finite element method and mechanical impedance method. After the example shows the danger of deep borehole small drill collars in deep well, it is considered that the large borehole small drill collar has big annulus, the rigidity of drill collar is weak, buckling under the axial force and exciting lateral vibration, Lateral deformation larger, due to vibration caused by alternating stress is also larger; vertical vibration prone to dynamic instability induced lateral vibration, transverse vibration and easy to induce torsional vibration. It is recommended to use large wellbore large drill collar design.