Flow activated sensor assembly

A system for triggering an application in a well at a target location, the system comprising:

• an oilfield tubular for conveying a fluid flow through a channel thereof;
• a sensor assembly having a flow translation device incorporated therein for mechanical responsiveness to the fluid flow;
• an electronics housing for processing data acquired from a detector coupled to said translation device;
• an actuator for the triggering, said actuator coupled to said housing for obtaining the processed data therefrom;
• a redundant sensor assembly having a second flow translation device incorporated therein coupled to the electronics housing, the redundant sensor assembly sensing fluid directed in an annulus;
• and
• a tool for carrying out the application at the target location.

A method of activating a downhole tool for an application in a well at a target location, the method comprising:

• pumping a fluid flow through a tubular conveyance into the well;
• intercepting a signal of the fluid flow with a translation device of a sensor assembly coupled to the conveyance;
• detecting mechanical output from the translation device resulting from said intercepting;
• employing a backup detection mechanism of the assembly for the activating, wherein said employing comprises:
• directing another fluid flow through an annulus of the well adjacent the assembly therein;
• and
• obtaining a signal of the fluid flow with a transducer of the assembly in fluid communication with the annulus;
• and
• processing detections from said detecting to trigger the activating.