From the viewpoint of sucker rod stress changing,this paper has analyzed the influence of augmenting the pump diameter,depth of pump,pumping stroke length and speed to sucker rod breaking.

• 从抽油杆应力变化的观点分析了调大抽油泵泵径、泵深和抽油机冲程、冲次对抽油杆断裂的影响。