PLUG-IN SHUT-OFF VALVE (VERSIONS) Russian patent published in 2019 - IPC E21B23/14 E21B34/10 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and can be used for oil production. Plug-in cutoff valve is installed inside the pipe shut-off valve in the tubing string and comprises a housing with a longitudinal channel, upper mounting assembly with retractable dies for fixation inside the pipe shut-off valve, which has mounting nipple, hydraulic line, annular seals and valve device with element displacing under effect of springs. Plug-in shut-off valve is installed on the load-carrying cable, the hydraulic line is equipped with tubes connected to two valves. First valve is connected to the pipe shut-off valve in the tubing string, and the second valve is connected to the port in the inner part of the landing nipple. Movable element is a hollow sleeve, and the valve device is made in form of matching holes in the sleeve and body. In the alternative version of the plug-in shut-off valve is equipped with a separate hydraulic line controlled from the surface and passing along the longitudinal channel of the housing.

EFFECT: technical result consists in maintaining the serviceability of the pipe shut-off valve after removing the plug-in valve.

4 cl, 4 dwg