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Down-hole valve close control line tied to Annulus pressure

IP.com Disclosure Number: IPCOM000237547D
Publication Date: 2014-Jun-23

Publishing Venue

The IP.com Prior Art Database


Rather than running a line to surface as a common close for multiple zones controlled by down-hole hydraulic valves which utilize an open and a close line to shift the valve, the close line could be tied to the annulus pressure above the production packer via a specialized piston to achieve the desired pressure in the close side of the hydraulic valve control chamber A common close control line would be open to Annulus pressure above the production packer, then run through the packer to a piston sized to provide the desired pressure in the close side of the valve. The valve would then operate by reducing pressure in the open line until the sleeve closes, or increasing pressure in the open line until it opens. This would effectively reduce one line from surface