Configuration No. 2

Closed system. Perforation using explosive hydro mechanical head VGM73 without circulation openings. Assembly provides perforation under drawdown with packer and circulating valve, opened after mechanical impact of the drop bar on breaking-off pin when perforator is initiated. Use of the spacer (perforator frame without charge between impact head and charged perforator) is required for safe operations.

Production tubing
Shortened connection pipe
Packer
Circulating valve with breaking-off pin
Cuttings trap
VGM73 without circulation openings
Spacer
Shaped charge perforator