METHOD AND APPARATUS FOR JET-FLUID ABRASIVE CUTTING

摘要

A method and apparatus for down hole abrasive jet-fluid cutting, the apparatus includes a jet-fluid nozzle (4) and a high pressure pump (19) capable of delivering a high-pressure abrasive fluid mixture to the jet-fluid nozzle (4), an abrasive fluid mixing unit capable of maintaining and providing a coherent abrasive fluid mixture, a tube (9) to deliver the high pressure coherent abrasive mixture down hole to the jet-fluid nozzle (4), and a jetting shoe (5) adapted to receive the jet-fluid nozzle and directing abrasive jet-fluid mixture towards a work piece. A jetting shoe controlling unit manipulates the jetting shoe (5) along a vertical and horizontal axis and a central processing unit (11) having a memory unit capable of storing profile generation data for cutting a predefined shape or window profile in the work piece and coordinating the operation of various subsystems.