Patent ID: 8066070

Claim:
A blade for severing a tubular of a wellbore, the tubular positionable in a blowout preventer, the blade comprising: a blade body movable toward and away from the tubular by a ram of the blowout preventer, the blade body comprising: a cutting surface on front face of the blade body that faces the tubular, the cutting surface comprising a plurality of portions and at least one inclined face, at least one of the plurality of portions being linear; and at least one projection extending a distance from the front face toward the tubular, the at least one projection having a tip positioned between the plurality of portions of the cutting surface; wherein the blade body is movably positionable through at least a portion of the tubular such that the at least one projection first pierces the tubular and then the cutting surface passes through the tubular such that the at least one of the plurality of linear portions engages the tubular whereby the entire tubular is severed.