Patent ID: 9097080
Filing Date: 2015-08-04
Classification: E21B

Abstract:
1. A method of separating a riser, comprising: providing a riser having an inner and an outer surface, a circumference of said outer surface, a longitudinal axis, a first end and a second end, and choke, kill, and boost lines; radially surrounding said riser and said choke, kill, and boost lines with an explosive shaped charge material, wherein said explosive shaped charge material is capable of generating a high-velocity plasma jet in response to an activation signal, and wherein said explosive shaped charge material comprises an electrically conductive layer; transmitting said activation signal to said explosive shaped charge material; generating said high-velocity plasma jet; and separating said riser into a first portion comprising said first end and a second portion comprising said second end when said high-velocity plasma jet penetrates said outer surface of said riser and exits said inner surface of said riser.