Dynamic negative pressure perforation is a new method to clean the perforation channel at the moment of perforation. The principle is to reduce the pressure in the wellbore immediately after perforation by rapidly absorbing the residual detonation energy in the wellbore, resulting in instantaneous impact reflux, flushing the perforation channel and the compaction zone around the hole, so as to remove compaction and increase the production of oil and gas wells.

In addition to the main functions of compound perforation, for dynamic negative pressure perforation, the dynamic negative pressure p - t curve under open and closed conditions can be calculated, the influence of dynamic negative pressure perforation and conventional perforation on oil and gas productivity, the calculation of surface flow rate under different bottom hole pressure of dynamic negative pressure perforation over time and so on function.