ApplicationNo. 178568 filed on 01/07/1994
US Classes:175/376, Nonsymmetrical bit (e.g., nontracking)175/377, Spiral rib or tooth row175/378Irregular tooth cutter row
ExaminersPrimary: Dang, Hoang C.
Attorney, Agent or Firm
International ClassE21B 010/16
AbstractA drill bit includes a rolling cutter having a plurality of circumferential rows of teeth protruding from the body of the cutter. At least one of the rows of teeth is a closed-end circumferential row located on the surface of the cutter along a closed-end circumferential path. The latter is a non-circular curve defined by a surface intersecting the body of the cutter obliquely with respect to its longitudinal axis.