摘要
为了深入研究射孔对套管抗外挤强度的影响程度 ,将射孔套管三维力学模型简化为平面孔板力学模型 ,在外挤压力作用下 ,根据弹性力学理论 ,推导出射孔套管抗挤强度系数的理论公式 ,其理论计算结果与国外文献的实验结果吻合。利用推导的抗挤强度系数理论公式分析孔径、孔密及相位角的变化对其抗挤强度系数的影响 ,其结果为优化射孔设计提供了简便的方法。
To make a further investigation in the effect of perforation on the collapsing strength of the casing, the 3-D mechanical model of the perforated casing is simplified subtly as 2-D mechanical model of plate with holes. According to the theory of elasticity mechanics, the formula of the collapsing strength coefficient of the perforated casing under outer pressure is derived. The calculated results agree with the experimental results presented in SPE literature. The shot diameter, shot density and shot phasing related to the collapsing strength coefficient are analyzed, and the result is helpful to the perforation optimum design.
出处
《石油机械》
北大核心
2004年第12期11-13,19,共4页
China Petroleum Machinery
基金
国家自然科学基金项目"基于数值模拟的复杂套管破坏机理研究" (批准号 :5 0 0 740 45
2 0 0 0年 )资助
