Tubing Punches

A special perforating gun, or charge, that is designed for limited penetration to allow an inner tubing or casing string to be perforated without damaging a surrounding outer string.

In order to perforate an inner tube or casing string without injuring an adjacent outer string, a speciﬁc perforating gun, or charge, that is designed for limited penetration, must be used. These weapons are frequently utilized in remedial or workover operations where sliding sleeves or other downhole communication devices cannot be opened to allow the passage of well-kill fluids