METHOD AND DEVICE FOR DRILLING WITH MELTING Russian patent published in 2014 - IPC E21B7/14 E21B7/20 

FIELD: mining.

SUBSTANCE: group of inventions relates to the method and device for drilling with melting for making wells, shafts and tunnels of precise size in soil, in particular, in rock, where the well base is melted with the help of the melt, and the melt of the overburden is pressed into environment, in particular, into surrounding rock loosened as a result of action of temperature and pressure, and in which it during drilling due to hardening melt a well drag is formed around a casing string formed from tubular elements. Metal in solid aggregate condition is supplied into the central groove of the lower tubular element of the casing string open upwards on top via above tubular elements, in this groove it is melted due to energy supply, and sent via channels, which stretch from the groove outside and end in the outer side surface of the tube element, into the external surrounding of the tubular element, rock melt produced under the lowest tubular element is pressed into surrounding rock to form a metal drag that surrounds the casing string by hardening.

EFFECT: continuous metal drag of high casting quality and simplified energy input for performance of melting process.

30 cl, 2 dwg