Abstract
Sucker rod pumping system is the main equipment of domestic mechanical oil production. The eccentric wear of the rod is the main factor that affects the optimal design of the rod pump system and the reasonable evaluation of pump detection period. Therefore, considering the effect of rod string buckling in tubing, a simulation method for the critical contact load of buckling rod string in tubing is established. In the detail, with double coordinate system method, and the finite element analysis dynamic model of sucker rod string is established. Using ANSYS software, a simulation method for critical contact load of rod string buckling in tubing is established. The simulation results show that the pipe contact stress is affected by the rod string diameter. The maximum stress increases with decreasing the diameter of rod string. The maximum stress of rod string increases with increasing the polished rod load. The effect of polished rod load and rod diameter on buckling stress is considered comprehensively, and the optimum design area of rod string is given. The simulation results have important theoretical and practical for optimal design of sucker rod pumping system and reasonable evaluation of oil well pump testing period.
Published Version
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