DRILL BIT WITH HORIZONTAL FLOW OF FLUID Russian patent published in 2001 - IPC

FIELD: drilling operations. SUBSTANCE: invention is related to drill bit of cutting-abrasion type. Drill bit is made of body, teeth, cutting members and flushing conduits. Body is of stepped type, cutting members are placed on each step with counter-clockwise displacement. Cutting members have through holes, steps of body are fitted with conduits which are continuations of through holes in cutting members. Besides this each step forms horizontal flushing conduits with surface of face. EFFECT: increased operational efficiency of drill bit thanks to provision of successful cleaning of face and boring bits by way of formation of horizontal flow of fluid in zone of interaction of cutting members with face. 3 dwg