BORE HOLES DRILLING TOOL Russian patent published in 1995 - IPC

FIELD: mining industry. SUBSTANCE: bore holes drilling tool has body 1 with axial canals 3 and radial canals 4, made in the form of two cylindrical drillings, in which corresponding spring-loaded rods 6 are mounted with butt stops 7. Butt stops 7 are made with slot bulges and one of two drillings of radial canals 4 has corresponding slot grooves 10. In the case radial canals are covered with lids 13 from side of stops 7 and from opposite sides rods 6 have openings 14, located in planes, that are in parallel to axis of body 1, and holes to match axes 17, located in planes, that are perpendicular to axis of body 1. Rollers 16 are rotating on axes 17 and in the case at two neighboring levels 5 they are directed to opposite sides. Spring-loaded piston 20 is located in lower part of axial canal 3 and covered with stopper 25 from above. Hydraulically communicated cavities of axial canals 3 and radial canals 4 are filled with lubricant 24. Additional through longitudinal holes, communicating space over lubricant filled cavity 27 and under lubricant filled cavity 28, are located on both sides of radial canals 4, located in one plane vertically. EFFECT: bore hole drilling tool is effectively used in construction of vertical and inclined bore holes. 6 dwg