Magnetic sensor assembly for actuating a wellbore valve

A method of actuating a valve in a wellbore comprising:

• positioning a sensor assembly within the wellbore, the sensor assembly comprising a magnet and a sensor for the magnet;
• and
• running a tool into the wellbore, wherein the sensor assembly detects the presence of the tool when the tool is located adjacent to the magnet, wherein when the sensor assembly detects the presence of the tool one or more times, then the sensor assembly actuates the valve to open, and wherein the valve is located within a casing of the wellbore.

The method according to claim 13, wherein when the valve is in a closed position, fluids are prevented from flowing in any direction past the valve through the casing, and when the valve is in an open position, fluid flow past the valve can occur.

The method according to claim 23, wherein the sensor assembly is programmed to actuate the valve to close when the presence of the tool is detected the second time.

A sensor assembly for actuating a valve comprising:

• a magnet;
• and
• a sensor for the magnet, wherein a tool that is positioned adjacent to the magnet alters the magnetic field of the magnet, wherein the sensor detects the alteration of the magnetic field, and when the sensor detects the alteration, then the sensor actuates a valve to open or close.