An insert valve installed, at least partially, in a safety valve that includes a flow port disposed on an exterior of the insert valve, a poppet configured to control a fluid flow through the flow port, a piston rod, disposed uphole from the poppet, configured to move the poppet past at least part of the flow port, and a hydraulic control port configured to control movement of the piston rod.

Disclosed embodiments relate to hydraulic safety valves for a well, which may be configured to close in the event of a loss of pressure for example. In embodiments, the safety valve may comprise a wireline retrievable safety valve (WRSV) configured for use within a tubing retrievable safety valve (TRSV) in a wellbore, for example to provide safety valve functionality in the event that the TRSV no longer functions properly. The WRSV may be configured to be operated using the hydraulic lines(s) of the TRSV, for example a control line and a balance line. In embodiments, a control piston of the WRSV may be in fluid communication with the control line through the TRSV, and a balance piston of the WRSV may be in fluid communication with the balance line through the TRSV. Related methods and systems are also disclosed.

An insert safety valve, including a housing, a flow tube in the housing, a flapper responsive to positions of the flow tube, an atmospheric chamber in the housing, an element upon the housing, a selectively openable arrangement to prevent or allow pressure communication between the chamber and an environment outside the housing, the arrangement including an opener responsive to movement of the element to selectively open the openable arrangement. A borehole system, including a preexisting downhole structure having a control line, an insert safety valve, in the preexisting downhole structure, the insert safety valve operable with the control line. A method for controlling a wellbore, including running an insert safety valve while preventing fluid communication with an atmospheric chamber of the safety valve, moving the opener, and enabling fluid communication with the atmospheric chamber.