Definition(s)
Perforating Equipment and Accessories
Devices used to create holes in the casing to connect the formation to the casing ID and accessories such as circulating subs, tubing releases, shock absorbers, Y block assemblies, blast joints, gun hanger systems, and swivel subs.
Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global Standards