【摘要】 在水平井和定向井的采油过程中,油管内壁和运动的油杆接箍及扶正器之间经常发生接触,使油管内壁发生偏磨。文中将偏磨油管的破裂强度问题看作失稳问题,应用弹塑性有限元方法分析了偏磨油管的破裂强度。并通过ANSYS的计算结果与试验结果对比,发现它们具有良好的一致性,这表明了在油管的磨耗量一定的情况下弹塑性有限元方法具有高度的适应性。结果显示,偏磨油管破裂强度反比于油管壁厚的磨耗比。更多还原

【Abstract】 During the horizontal well and the directional well extraction process, vitta and the oil-pole joint and the centralizer frequently have the contact which makes the vitta have the lopsided abrasion. We regarding resistancial intensity of lopsided abrasion vitta as destruction question, applying elastoplastic finite element method to analyzed the lopsided abrasion vitta′s resistancial intensity. Using contrast of the ANSYS result and the test result have the good uniformity, which is shown that in a certain situation the elastoplastic finite element method has the high compatibility in vitta abrasion. The result indicated, the resistance intensity of lopsided abrasion vitta in reverse proportion to the thickness attrited ratio of vitta.更多还原