It is primarily intended for use in basic well testing situations where a flowing well is shut-in downhole and the resulting pressure build up is monitored by memory gauges. The ReAct™ delay period is programmed at surface prior to running in hole and can be set for any interval up to 150 days. When the ReAct™ delay period expires, a pilot valve mechanism is actuated that allows well pressure to enter the tool and shift a sleeve, straddling the flow ports and shutting-in the well pressure below the tool. No intervention or communication from surface is required.
The Tool contains two independent sets of ReAct™ electronics and two pilot valve mechanisms for 100% redundancy and once closed the valve is mechanically locked in the closed position.
Download Data sheet:
http://www.omega-completion.com/images/High-Temperature-Shut-In-Tool/ReAct-Shut-In-Tool.pdf