Patent ID: 9228421
Filing Date: 2016-01-05
CPC Classification: E21B

Claim Text:
1. An assembly for perforating a subterranean formation for use in a tubular member having at least one port, the tubular member being insertable in a wellbore intersecting the subterranean formation and receives a treatment fluid under pressure, the assembly comprising: an insert having a body for sealing engagement with the port, the body including a core having a first mode wherein the core prevents fluid passage through the body and a second mode wherein the core disengages from the body upon the treatment fluid reaching a threshold pressure and ejects from the body as a projectile and fractures the formation with the pressurized treatment fluid exiting the port; and a debris shield mountable in the port, spaced from the core, wherein the shield and insert define a chamber therewithin, and wherein the shield includes at least one hole in the shield prior to the core disengaging from the body.