发明名称 |
MODIFIED CUTTERS AND A METHOD OF DRILLING WITH MODIFIED CUTTERS |
摘要 |
A cutter for a drag bit may include a substrate and an ultrahard layer on an end surface of the substrate. The ultrahard layer may include an exposed surface having at least three depressions extending from an interior of the exposed surface radially outward to a peripheral edge formed between the working surface and a side surface of the ultrahard layer, the at least three depressions separated from each other by at least three raised regions forming an apex of the exposed surface, the at least three raised regions connected to each other proximate the central axis and extending from proximate the central axis to the peripheral edge. Other working surfaces are also included. |
申请公布号 |
US2016032657(A1) |
申请公布日期 |
2016.02.04 |
申请号 |
US201514880740 |
申请日期 |
2015.10.12 |
申请人 |
Smith International, Inc. |
发明人 |
Zhang Youhe;Shen Yuelin |
分类号 |
E21B10/567;E21B10/55 |
主分类号 |
E21B10/567 |
代理机构 |
|
代理人 |
|
主权项 |
1. A cutter, comprising:
a substrate; and an ultrahard layer on an end surface of the substrate, the ultrahard layer including a central axis and an exposed surface having at least three depressions extending from an interior of the exposed surface radially outward to a peripheral edge formed between the working surface and a side surface of the ultrahard layer, the at least three depressions separated from each other by at least three raised regions forming an apex of the exposed surface, the at least three raised regions connected to each other proximate the central axis and extending from proximate the central axis to the peripheral edge. |
地址 |
Houston TX US |