VGS 004-30.000, VGS 004-32.000, VGS 004-33.000, VGS 004-34.000 Bars are used as a rule to mechanically activate tubing conveyed perforating systems. The top end of a bar is designed with a fishing neck for easy fishing. It is pulled out of the well with VGS 004-22.000 BAR Fishing Tool.
Depending upon the application the bar can be deployed by hand or can be released from the lubricator. Its primary use is to activate firing heads. Additionally drop bars can be used to knock out the restrictions in tools such as debris barriers, surge tools or to activate pressure release subs.