SHOE FOR PROFILED SHUTTER INSTALLATION IN WELL Russian patent published in 2007 - IPC E21B29/10 

FIELD: well drilling, particularly devices to isolate zones characterized by drilling problems.

SUBSTANCE: shoe comprises body with central channel and valve member with through channel installed in the central body channel so that the valve member may slide with respect to central channel axis. Through channel of valve member may be communicated with profiled shutter interior through radial orifices. Valve member is restricted from longitudinal movement by means of fixer made as retaining ring. The valve member is attached to the body by splined connection to prevent valve member rotation. The body is provided with head having conical annular grooves. Body and sliding valve member are coaxial and provided with threads to connect thereof correspondingly with shutter and installation tools, for instance with flaring means. The flaring means has engagement unit with thread and insert with split retaining rings to be inserted in conical threaded grooves of the head as flaring means coaxially connects with sliding valve member and disconnects from shutter.

EFFECT: increased reliability and working ability due to prevention of breakage of shutter connection with installation tools.

5 dwg