The results indicated that modelcasing was destroyed by shear stress.
试验结果表明,该模型机匣的非包容失效模式主要是剪切破坏。
2
The model consists of perforation, wellbore, cement casing, oil layer, micro-annulus and transverse fracture.
模型中包括射孔孔眼、套管、水泥环、油层、微环隙和横向裂缝。
3
Based on the theory of the viscoelastic rheological model, the coupled mechanical model of the soft rocks, the concrete sheath and the casing is developed.