THERMAL-MECHANICAL DRILLING DEVICE Russian patent published in 2005 - IPC

FIELD: mining industry, particularly devices for drilling and reaming wells in hard rock.

SUBSTANCE: drilling device has drilling tool made as boring rod with rock-cutting members and flame-jet burner installed at end thereof. Device also comprises pipelines for supplying fuel, water and air from discharge compressor outlet to flame-jet burner, as well as compressor with filter arranged at suction pipe inlet. Filter comprises body with condensate-tapper, converging nozzle and deflector. Flame-jet burner is made as a plurality of nozzles. Number of burner nozzles is divisible by 2. Each nozzle has curvilinear grooves extending from inlet orifice to outlet one in longitudinal direction. Curvature of groove generatrix of one nozzle advances in clockwise direction. Curvature of groove generatrix of another nozzle advances in counterclockwise direction.

EFFECT: reduced power inputs due to improved parameters of temperature fields and fields of stresses in well body where high-temperature fuel combustion processes cooperate with rock of complex structure and texture.

3 dwg