DIAMOND IMPREGNATED BITS AND METHOD OF USING AND MANUFACTURING THE SAME
摘要
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; and at least one of the plurality of ribs having a cutting portion of the at least one rib comprising a first diamond impregnated matrix material and at least a portion of a gage surface region thereof comprising a second diamond impregnated matrix material, the gage surface region backed by a third matrix material is disclosed.
申请公布号
WO2009140122(A2)
申请公布日期
2009.11.19
申请号
WO2009US43061
申请日期
2009.05.07
申请人
SMITH INTERNATIONAL, INC.;LOCKWOOD, GREGORY, T.;FULENCHEK, JONAN