【摘要】 通过收集石油套管现场失效数据资料，以套管失效为顶事件建立了石油套管的故障树，该故障树共考虑了４７个不同的基本事件。通过对套管故障树的分析，得到了套管失效故障树的一阶最小割集２７ 个，二阶最小割集２９ 个，四阶最小割集１ 个，确立了套管的主要失效形式为潜在损坏、套管挤毁、套管断裂及严重腐蚀，并提出了提高套管可靠性的措施。更多还原

【Abstract】 According to the data casing failure from oilfield, and casing failure as top event, the fault tree of the casing was established in the paper, the model included 47 different essential events. By analyzing the fault tree of casing, 27 one-order minimum cut sets, 29 two-order minimum cut sets and 1 four-order minimum cut sets of the fault tree were obtained. The casing failure is collapse, fracture and serious corrosion, finally the paper presents some measures of improving reliability of the casing.更多还原