INJECTION OF FLUID INTO SELECTED ONES OF MULTIPLE ZONES WITH WELL TOOLS SELECTIVELY RESPONSIVE TO MAGNETIC PATTERNS

摘要

A method of actuating a well tool can include producing a magnetic pattern in the well, thereby transmitting a corresponding magnetic signal to the well tool, and the well tool actuating in response to detection of the magnetic signal. A method of injecting fluid into selected ones of multiple zones can include producing a magnetic pattern in a tubular string having multiple injection valves interconnected therein, actuating a set of at least one of the injection valves in response to the magnetic pattern producing, producing another magnetic pattern in the tubular string, and actuating another set of at least one of the injection valves in response to the second magnetic pattern producing.