The perforation impact dynamic loads can destroy or disable the tubing strings. The perforated completion process was simplified to explosion of ordinary explosive charge in perforation liquid. The dimensionless expression of perforation impact dynamic loads was derived based on main influence factors and then its engineering calculation formula was set up. A well perforation operation in western Sichuan as an example, the oil tubing strings security was analyzed by the perforation impact dynamic loads from the engineering computation formula. The results show that the tubing strings only occur elastic spiral bucking and do not occur plastic deformation which are in line with perforation operation results on site.

Quasi-static and dynamic compression of open-cell and close-cell aluminum foams were investigated by MTS-809 material testing machine and Split Hopkinson Pressure Bar under the free state and passive confined pressure conditions. Experimental results indicate that the passive confined pressure has an important impact on quasi-static and dynamic compression mechanical properties of open-cell and close-cell aluminum foams. The enhancement effect of the passive confined pressure on close-cell aluminum foams is stronger than the impact on open-cell aluminum foams. The quasi-static and dynamic compression processes of aluminum foams consist of elastic stage, yield platform stage and compacting stage. The open-cell and close-cell aluminum foams investigated have strain rate sensitivity characteristics.

During the perforating and testing combination, the tubing, packer and casing are strongly impacted by shock-wave generated from oil perforators would be damaged. The energy conversion and energy equivalent theories and the underwater explosion energy method are applied to investigate the perforation remnant energy. The theoretical analysis results indicate that the explosion remnant energy of the perforators is the main energy source causing damage of the tubing, packer and casing and the explosion process of the perforators with guns in the oil well can be simplified to the explosion of ordinary explosive charges in the perforation liquid. TNT equivalent and HMX equivalent of perforation remnant energy of three type perforators are obtained by experiments and Cole Formula. Studying results can help to predict dynamic wellbore behaviors and provide a reference for designing the perforation program.