Blast Joints are heavy wall tubes, which are run as an integral part of the tubing string. The purpose of a blast joint is to minimize the effect of external erosive action. Blast Joints are heavy wall connectors made up in tubing strings opposite the location where perforations are made in the production casing. These blast joints are commonly used when an oil or gas well are drilled, which encounters two or more producing formations or zones. Blast joints are designed and developed in order to protect the tubing. Blast joints are used as protective devices against tubing damage from the erosive effects of fluids jets from the perforations. Blast joints are placed opposite perforations in multiple string completions or single string multi-zone completions. These joints are used as protective devices against tubing damage from the erosive effects of fluids jets from the perforations.