COLUMN SHOE WITH HYDRAULIC DRIVE Russian patent published in 2021 - IPC E21B17/14 

FIELD: oil and gas.

SUBSTANCE: invention relates to the field of construction of oil and gas wells and is intended for the development of an open borehole when lowering the casing string. Column shoe with hydraulic drive comprises housing and shank coaxially fixed on its lower end with the possibility of rotation. Moreover, the body is a cylindrical glass, in the side wall of which, in conjunction with the inner surface of the bottom with an equal pitch along the circumference, spiral channels are made, the angle of entry of which relative to the vertical axis does not exceed the angle of exit, while the outlet openings of the channels are oriented tangentially to the side surface of the body. The shank contains an internal annular cavity conjugated with the body surface at the location of the outlet openings of the spiral channels, in which a vertical bucket-type turbine is installed.

EFFECT: technical result is to reduce the unproductive energy losses of the fluid flow and, as a consequence, to increase the efficiency of the hydraulic drive.

2 cl, 2 dwg