Casing deformation takes place in these geological environments such as plastic rock layer, fault zone, active lithosphere zone, earthquake zone and the place where sand flows.

• 分析了油井套管损坏的地质环境,指出在塑性岩层、断层、地壳活动、地震活动及油层出砂等地质环境中易造成油井的套管损坏。