发明名称 |
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 |
US2009283336(A1) |
申请公布日期 |
2009.11.19 |
申请号 |
US20080121504 |
申请日期 |
2008.05.15 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
LOCKWOOD GREGORY T.;FULENCHEK JONAN |
分类号 |
E21B10/55 |
主分类号 |
E21B10/55 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|