SEATING DEVICE Russian patent published in 2007 - IPC E21B23/06 E21B33/12 

FIELD: oil production equipment, particularly to install packer and anchor equipment in well by hydraulic method.

SUBSTANCE: seating device comprises sub connected to upper part of hydraulic cylinder, shaft with piston connected thereto installed in the hydraulic cylinder, rest connected to lower part of hydraulic cylinder, stop unit attached to rest and installed on the shaft, and control-rod with stem. Installed on the shaft are damping means and mechanism including split nut and bush connected thereto. The bush may be displaced by means of damping means. Control-rod with stem is fastened to rod by means of thrust washer. Lower part of hydraulic cylinder is connected with the rest through lower bush.

EFFECT: increased operational reliability, possibility to perform remedial cementing and other works in well without device lifting.

2 cl, 1 dwg