DEVICE FOR COMBINED MECHANICAL AND THERMAL HOLE REAMING Russian patent published in 2013 - IPC E21B7/14 E21B7/28 E21C37/16 

FIELD: mining.

SUBSTANCE: proposed device comprises electric heaters with adsorber arranged in series in air feed line. Note here that adsorber is composed of two different-diameter cylinders fitted one into another. Note also that adsorber smaller cylinder wall is tightly fitted on outer surface of tube discharging vapor-gas mix into atmosphere. Adsorbent is arranged in spring-loaded cassette displacing in vertical direction between larger cylinder inner surface and smaller cylinder outer surface. Said adsorber cylinders are made of bimetals. Note that larger cylinder inner surface material features thermal conductivity 2.0-2.5 times higher than that of outer surface material. Smaller cylinder outer surface material features thermal conductivity 2.0-2.5 times lower than that smaller cylinder on the side of the tube discharging vapor-gas mix into atmosphere.

EFFECT: higher efficiency of reaming.

4 dwg