On the basis of analyzing the failure forms of the sucker rod, the existence of the torsional vibration of the sucker rod was approved and its reason was found out.

• 在综合分析抽油杆破坏形式的基础上,肯定了采油过程中抽油杆扭转振动的客观存在,分析了抽油杆产生扭转振动的原因。