Patent ID: 8381807
Filing Date: 2013-02-26
Classification: E21B

Abstract:
1. A downhole tool for stimulating a hydrocarbon-producing formation, the downhole tool comprising: a first section having an internal sidewall defining at least a portion of a flowpath, and an outer sidewall; a propellant volume having at least a portion within said first section; an annular portion with at least one chamber having an end positioned adjacent to said propellant volume and an inlet; at least one detonator assembly within said at least one chamber proximal to said end; at least one firing pin within said at least one chamber, said at least one firing pin having a first end pressure isolated from a second end; a second section at least partially separating said flowpath and the exterior of the downhole tool; and a sleeve assembly defining at least a portion of said flowpath and moveable between a first position and a second position, wherein in said first position said sleeve assembly is between the inlet of said at least one chamber and said flowpath.