ROTOR-TURBINE DRILLING METHOD Russian patent published in 2007 - IPC E21B7/00 E02D17/00 

FIELD: mining equipment engineering, possible use during construction of anti-filtration screens, construction of foundations or "walls in soil", drilling of large diameter wells during operations for hydro-extraction of mineral resource.

SUBSTANCE: rotor-turbine drilling method includes lowering working tool, consisting of turbo-drills with rock-destroying implements, hydraulic feed of working tool and rotation of rock-destroying implements around native axes, evening out mine walls and removing destruction products. Directly during drilling, one-, two- or n-stepped cuttings of inter-bit shelves are performed, and also additional crushing and mixing of destroyed rock by means of cutters and brackets of bar chains, mounted with possible movement around spindles of turbo-drills. Bar chains are mounted on sprockets with diameter of equal value or with diameter of different value, increasing upwardly. On one of spindles sprockets are mounted with rigid holding relatively to spindle, and on another one - with possible rotation. When a large diameter well is drilled, working tool is rotated around central axis.

EFFECT: production of even and smooth surface of mine walls surface, increase of useful area in mine cross-section due to that and production of screens with even water impermeability.

3 dwg