MANUAL REAMER FOR WELLS Russian patent published in 2013 - IPC E21B10/26 

FIELD: mining.

SUBSTANCE: manual reamer for wells consists of a rod, a handle, cutting elements and a soil receiving device with a bottom. Reamer has primary structure made in the form of a tubular ring connected to the rod by means of spokes, and upper edge of the soil receiving device is bent to provide its stiffness and connected to primary structure through not less than two cutting elements installed at an angle of 40°-45° relative to vertical rotation axis of the rod; at that, each element is made in the form of a blade that is rectangular in plan of the shape with edges bent throughout its width and a cutting edge throughout its length; at that, bent edges have the shape of oppositely directed triangles, and cutting edge of each cutting element consists of two parts - upper one that is parallel relative to vertical rotation axis of the rod, and lower one that is parallel to generatrix of the cutting element.

EFFECT: enlarging possibilities of manual drilling bits during drilling of wells with the diameter of more than 40 cm, and reducing the forces when drilling such wells.

3 cl, 3 dwg