The Study of Tubing Vibration Mechanism in High Pressure Gas Well

Deep gas wells and fields have the characteristics of high pressure. The vibration tubing string during production causes to be subjected severe stress even dynamic fatigue failure. Therefore, this article is based on finite element theory, aiming at large-size strings in deep wells. mechanics model mathematical packer high-pressure were established, ANSYS software was re-developed. analysis program for dynamics unbuckled buckled compiled with APDL, displacement longitudinal studied. According different sizes currently used fields, simulation calculations are carried out, axial impact load buckling damage laws entire well section under rates obtained. It provides a theoretical basis prediction law measures prevent vibration.