ROLLING CUTTER OF DRILL BIT Russian patent published in 1994 - IPC

FIELD: drilling. SUBSTANCE: in intertooth recessions 3 restoring members 4 with maximum deformation 0.03-0.2 are placed. With relative deformations less than maximum ones deformation modulus is 2-20 MPa. Height of restoring members 4 is equal to 0.8 or less of depth of recession. Slurry pressed into recessions 3 in operation is pushed out with restoring members 4 if deformation modulus of members 4 will be within specified limits. Specified height of members 4 provides for sufficient pushing force to remove slurry from recessions 3. EFFECT: enhanced efficiency of operation of rolling cutter of drill bit thanks to better cleaning of drill bit from slurry. 3 dwg