CEMENTING DEVICE Russian patent published in 2007 - IPC E21B33/13 E21B27/02 

FIELD: drilling and operation of wells.

SUBSTANCE: cementing device contains hollow container, including body with piston, dividing it on above-piston hollow and working hollow, filled with cementing material, sub, mounted with possible rotation, impulse device and packing element. Impulse device is made in form of striking mechanism, for example, in form of catcher, and is mated with piston by means of rod. Rod is connected to striking mechanism, is positioned in above-piston area, mated with sub and has capability for axial movement and transfer of torque to body. Unloading apertures are made in body wall. Tail is mounted on outer side of body, having through apertures, corresponding to unloading apertures, with possible combination with the latter in process of unpacking of device. Circulation pipe mated with piston and rod is mounted along the axis of body. Piston is made circular while rod is made hollow.

EFFECT: increased efficiency and reliability of well cementing, simplified technological process and expanded functional capabilities of device.

1 dwg