Improved method and apparatus for locking charges into a charge holder

摘要

A perforation gun (100) comprises a charge holder (102) for accepting at least one explosive charge stored in a case (106), a cover for use over the charge holder (102), and a detonation cord for connecting the at least one explosive charge to a detonation source. The charge holder (102) comprises a loading tube including at least one hole (108) disposed through a wall of said loading tube, said hole (108) having a circumference (112) defining at least one tab (114).