摘要
经有限元分析提出了射孔开裂套管应力强度因子近似计算公式,采用最新的套管材料断裂韧性实验数据,研究了孔裂套管临界承载能力,阐述了J55、N80孔裂套管剩余强度与裂纹长度的关系,指出在套管设计中应考虑裂纹对套管强度的影响和消除套管射孔开裂的重要性。
The authors present the formula for calculating approximately the stress-intensity factor of perforate-cracked casings by finite element analysis, study the critical load capacity of perforate-cracked casings with new experimental data on the fracture toughness of casing materials, expound, taking J55 and N80 perforate-cracked casings as examples, the relation between residual strength and crack length, and point out that it is important to consider the effect of the crack on casing strength by casing design and to avoid crack occurance by perforating operation.
出处
《石油机械》
北大核心
1991年第8期24-28,5,共5页
China Petroleum Machinery
