Patent ID: 7527092
Filing Date: 2009-05-05
Classification: E21B

Abstract:
1. Apparatus for cutting shape or window profile(s) through casing, cement and formation rock using abrasive-jet-fluid flowing through a jet-nozzle, the apparatus comprising: a profile generation system which simultaneously directs the movements of a tubing string in a vertical axis and 360 degree horizontal rotary axis via servo drives to allow cutting of at least one of a casing, cement or formation rock, in any programmed shape or window profile(s); a jetting shoe coupled to the tubing string; coiled fluid tubing for delivering a coherent high pressure abrasive-jet-fluid through a single tube; a jet-nozzle for ejecting an abrasive-jet-fluid under high pressure from the jetting-shoe; and the profile generation system is capable of: storing shape or window profile(s) templates for cutting a shape or window profile in at least one of a casing; accepting user input to program new shape or window profile(s) based on user criteria; controlling the profile generation servo drives; controlling an abrasive mixture percent to total fluid volume; controlling the pressure and flow rates of a high pressure pump and drive; controlling feed and speed of a coiled fluid tubing unit and a coiled tubing injector head, controlling the simultaneous vertical and horizontal directional movements of the coiled tubing, scanning the cut shape or window profile(s) after the casing, cement or rock formation has been cut.