Patent ID: 7032672

Claim:
A safety valve for downhole use in a well comprising: a housing having a longitudinal bore extending therethrough and having a non annular hydraulic chamber in a sidewall portion thereof, the sidewall portion having a radially reduced region, at least a portion of the radially reduced region being adjacent to the non annular hydraulic chamber, the adjacent portion providing a location, for a fluid passageway between the non annular hydraulic chamber and the interior of the tubing retrievable safety valve created by penetrating through the adjacent portion and into the non annular hydraulic chamber with a communication tool, the longitudinal bore operable to receive the communication tool therein such that relative rotation between at least a portion of the communication tool and the safety valve is substantially prevented; a valve closure member mounted in the housing and operable to control fluid flow through the longitudinal bore, the valve closure member having closed and open positions; a flow tube disposed within the housing and operable to shift the valve closure member between the closed and open positions; and a rod piston slidably disposed in the non annular hydraulic chamber of the housing, the rod piston operably coupled to the flow tube.