SHOE VALVE FOR INSTALLATION OF SHAPED SHUTTER IN WELL Russian patent published in 2013 - IPC E21B29/00 

FIELD: mining.

SUBSTANCE: device comprises a body with a central passage channel, in which a hollow valve seat is placed with overflow channels, connected to the body with the help of a temporary breakable joint with the possibility of fixation in the working upper position with the help of a spring fixator and tight closure of overflow channels. The body is connected by thread with the bottom of the shaped shutter, is equipped on the top with a head for a crowfoot and holes displaced in radial direction, communicated with the central channel, and also upper end ledges for unfolding. In the body below the holes of the body there is a ledge installed as coaxial with the valve seat, made as capable of tight insertion into the seat cavity in the working position to close overflow channels.

EFFECT: increased reliability, expanded process capabilities.

2 dwg