Impact Analysis on Contact Force between the Rod and Oil-Tubing by Rod String Longitudinal Vibration
The wear of rod string and tubing in pump well is a common phenomenon, and the main cause is the longitudinal vibration of sucker rod. Considering the structural characteristics and load characteristics, the contact state of rod and tube is studied and calculated using the finite element method, based on vibration theory and nonlinear contact theory. The results show that rod and tube contact friction mainly occurs in the down stroke, and the contact force is larger in the bottom, smaller in the top, and contact position is distributed mainly over the coupling, and has the contact between rod body and tubing within the scope of lSOm.On this basis, various swabbing parameters which is about the degree of influence of the contact state is respectively studied, and the different swabbing parameters cause the different vibration load of rod string, and vibration load is larger, and dynamic instability is more serious, and contact force of rod tube is increased. On the basis of the above study, the proposal of value for preventing the rod and tube partial wear is given with some reference value.
rod string vibration swabbing parameter contact force finite element method
Su-ling Wang Qing-bin Li Zheng-wei Tian Li Fan
Mechanical Science and Engineering College, Northeast Petroleum University Daqing, Heilongjiang, Chi NO2.Daqing Oil Field Limited Liability Company Daqing, Heilongjiang, China 163454
国际会议
哈尔滨
英文
3206-3209
2011-08-12（万方平台首次上网日期，不代表论文的发表时间）