Hoop Stress Reducer In Perforating Guns

A method comprising:

• filling, with a sacrificial fill material, a substantial portion of an inner cavity of a charge tube via a feedthrough, wherein the sacrificial fill material is disposed against a plurality of charge cases in the inner cavity;
• and
• disposing a perforating tool string comprising a perforating gun in a wellbore, wherein the perforating gun comprises:
• a gun body;
• and
• the charge tube disposed within the gun body;
• and
• detonating the perforating gun to create one or more perforations that extend from the wellbore into a subterranean formation penetrated by the wellbore, wherein the sacrificial fill material absorbs energy during detonation to reduce hoop stress on the gun body.

A method for assembling a perforating gun comprising:

• disposing a flexible sleeve about an outer surface of a charge tube to form an inner cavity of the charge tube;
• fluidically coupling a source of a sacrificial fill material to the inner cavity via a feedthrough:
• filling at least a substantial portion of the inner cavity with the sacrificial fill material, wherein the sacrificial fill material is disposed against a plurality of charge cases in the inner cavity;
• and
• disposing the charge tube, the plurality of charge cases, and the sacrificial fill material in a gun body.