PARAMETRIC ANALYSIS OF THE PENETRATION PERFORMANCE OF SHAPED CHARGES USED AS OIL WELL PERFORATORS

摘要

Shaped charge is considered to be one of the most important destructive mechanisms to penetrate armors of the main battle tank and to perforate hard rocks in an oil well. In this paper, a series of numerical simulations using Autodyn hydro-code are performed in order to investigate the characteristics of the jet of a shaped charge and predict its penetration capabilities for different types of explosives in the main charge of a small caliber shaped charge with 36mm base diameter and electrolytic Copper for conical shape liner. The wave shape inside the main explosive charge is also considered in the analysis of the numerical simulation results.The numerical model of the shaped charges simulated by Autodyn-3D hydro-code will study the shaped charge jetting, jet formation profiles, jet tip velocities, cumulative jet mass and other related characteristics (e.g. pressure, compressibility, stresses, etc.).Since the penetration into rocks is greatly dependent on the kinetic energy of the jet, the parameters that will be considered are the jet tip velocity and the jet mass, based on which, the numerical results will be analyzed,