INSERT SAFETY VALVE (VARIANTS)

The invention relates to oil industry and can be used for the production of oil. An insert safety valve is mounted inside a piping safety valve in a production tubing string (2) and comprises a housing having a longitudinal bore (25), an upper landing assembly with extendable slips (20) for fixing inside the piping safety valve having a landing nipple (7), a hydraulic line (3), annular seals (21, 22) and a valve device with a spring-driven element (27). The insert safety valve is mounted on a carrying cable (16), the hydraulic line (3) has tubes (5, 6) connected to two valves (9, 10). The first valve (10) is connected to the piping safety valve housing (11) in the production tubing string (2), and the second valve (9) extends to a port (23) in the inner portion of the landing nipple (7). A hollow sleeve (26) functions as a moving element, and the valve device is formed as openings (28, 30) in the sleeve (26) and in the housing (25), wherein the openings (28, 30) are configured to being aligned. In an alternative embodiment, an insert safety valve has a separate hydraulic line (32) controlled from the surface and extending along the longitudinal bore of the housing (25). The technical effect is keeping the piping safety valve operable after the insert safety valve is removed.