SHOE FOR PLACEMENT OF PROFILE SHUTTER IN WELL Russian patent published in 2011 - IPC E21B29/10 

FIELD: oil and gas production.

SUBSTANCE: shoe consists of case with thread for connection with shutter and central channel, wherein valve element with through channels is installed coaxially-movable relative to geometrical axis of central channel. The valve element is equipped with a retaining ring interacting with a circular groove of the central channel of the case. Also, the shoe consists of gripping and reverse units for a fishing tool of location equipment. From beneath the shutter is equipped with an expandable filter furnished with a spring gripping unit from beneath. A nipple is arranged beneath the case; at transfer downwards the nipple pressure tight enters the spring gripping device and is fixed there. The central channel of the case has a seat with a ball valve below the valve element. The gripping unit is made in form of an internal taper of the central channel of the case above the valve element to provide location equipment with collet gripping. The reverse unit corresponds to blind orifices arranged on an upper end of the case around the central channel for corresponding lugs of the location equipment. The valve element is spring loaded upwards and travels down under force of location equipment collet gripping. Also, the ball valve is pressed to the seat and the valve is fixed with the retaining ring in the circular groove of the central channel of the case.

EFFECT: raised efficiency and reliability of procedure.

3 dwg