Patent ID: 8844625
Filing Date: 2014-09-30
Classification: E21B

Abstract:
1. A connector, for perforating guns having charges set off by a detonation cord, comprising: a housing assembly having at least one end connector to accept a perforating gun; at least one inner tubular connected to said end connector through which the detonation cord passes to the charges, said inner tubular forms part of an initially sealed conduit with respect to a surrounding annular space, said initially sealed conduit has fluids entering from a formation after the charges are set off at a time when said inner tubular is no longer sealed; an outer tubular supported by said end connector and mounted over said inner tubular to define said annular space which is free of the charges, said annular space along the substantial length of said outer tubular is in pressure balance with surrounding well fluid in the wellbore at a time before said gun is fired.