Patent ID: 8561683

Claim:
An apparatus for cutting a wellbore tubular, comprising: a receptacle engaging with a mandrel; an upper section and a lower section in the receptacle, the upper and the lower sections mating at a juncture plane defined by a plane transverse to a longitudinal axis of the wellbore tubular, wherein the each section includes a support plate having a passage, a ring-shaped liner positioned adjacent to the support plate, an energetic material disposed between the support plate and the liner, and a gap separating the liner from an interior surface of the receptacle, wherein the gap allows fluid communication between a space between the lower section and a lower inner space of the receptacle and a jet forming region; and an initiator having a shaft traversing the upper section and the lower section, wherein the initiator includes at least one radial bore that is orthogonal to the longitudinal axis and is bisected by the juncture plane; and a fastener engaging the shaft to compressively secure the upper section with the lower section, the fastener further having a pedestal portion that separates the lower section from the receptacle.