THE IMPACT OF NON-UNIFORMITY OF LOADING ON THE STRENGTH OF CASING
Crushing of the casing is one of the most important damage mechanisms in oil industry. It is caused by non-uniform loading among the sand, cement and casing. While most of the critical pressure ratings for casing are based on uniformly distributed pressures, it is extremely valuable to have an accurate understanding of the casing behaviors under non-uniform loading. With the help of the powerful capacity for symbol formulating of Mathematica, the authors derived the general solutions of stresses and displacements for the casing subjected to arbitrarily distributed forces, continuously or discontinuously and tangentially or radially. With these solutions the stresses are calculated in the casings under uniform and non-uniform pressures. The results show that the stresses in the casing under uneven loading are much greater than those under evenly distributed pressure. It is recommended that the impact of non-uniformity of loading on the strength of casing should be taken into considerations in the casing design, especially in special layers such as salt.
Yongshu Jiao Muhui Fan Zongxi Cai
Department of Mechanics, Hebei University of Technology, Tianjin, 300130, P. R. China Department of Mechanics, Tianjin University, 300072, P. R. China
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）