| abstract |
Down-hole cutting element may include that tool body；The multiple blades extended from tool body azimuth；With the multiple cutting elements arranged over many blades, the plurality of cutting element includes at least two cone cutting element with substrate and diamond layer, described diamond layer has conical cutting edge, at least one in wherein said at least two cone cutting element have in plus caster angle, and described at least two cone cutting element at least one there is minus caster. |