Patent ID: 9080431
Filing Date: 2015-07-14
Classification: E21B

Abstract:
1. A method for perforating a wellbore comprising the steps of: a) loading at least one charge comprising a reactive shaped charge within a charge carrier; b) positioning the charge carrier down the wellbore adjacent to an underground hydrocarbon bearing formation, the wellbore being in a pressure condition; c) without changing the pressure condition of the wellbore to a more underbalanced condition after the step of positioning, detonating the at least one charge in the wellbore to create a first and second explosive event, wherein the first explosive event creates at least one perforation tunnel within the adjacent formation, said perforation tunnel being surrounded by a crushed zone, and wherein the second explosive event is created by an exothermic intermetallic reaction between shaped charge liner components, the second explosive event eliminating a substantial portion of said crushed zone and clearing debris from within said perforation tunnel.