A drill bit that includes a body having a lower end face for engaging a rock formation, the end face having a plurality of raised ribs extending from the face of the bit body and separated by a plurality of channels therebetween; at least one of the plurality of ribs having a varying width along at least a portion of a rib height is disclosed.
申请公布号
WO2009140121(A2)
申请公布日期
2009.11.19
申请号
WO2009US43060
申请日期
2009.05.07
申请人
SMITH INTERNATIONAL, INC.;DURAIRAJAN, BALA;FULENCHEK, JONAN;LOCKWOOD, GREGORY, T.
发明人
DURAIRAJAN, BALA;FULENCHEK, JONAN;LOCKWOOD, GREGORY, T.