发明名称 |
DOWNHOLE DRILL BIT |
摘要 |
A downhole cutting tool may include a tool body; a plurality of blades extending from the tool body; a first blade comprising at least one pointed cutting element thereon, the at least one pointed cutting element comprising a first polycrystalline diamond material on a first carbide substrate, the first polycrystalline diamond material extending away from the first carbide substrate to terminate in a substantially pointed geometry opposite the first carbide substrate; a second blade comprising at least one shear cutting element, the at least one shear cutting element comprising a second polycrystalline diamond material on a second carbide substrate, the second polycrystalline diamond material forming a planar cutting surface opposite the substrate; wherein, when the first blade and the second blade are superimposed on each other, a central axis of the at least one pointed cutting element is offset from a central axis of the at least one shear cutting element. |
申请公布号 |
US2014196959(A1) |
申请公布日期 |
2014.07.17 |
申请号 |
US201314089385 |
申请日期 |
2013.11.25 |
申请人 |
Schlumberger Technology Corporation |
发明人 |
Hall David R.;Bailey John D.;Crockett Ronald B. |
分类号 |
E21B10/573 |
主分类号 |
E21B10/573 |
代理机构 |
|
代理人 |
|
主权项 |
1. A downhole cutting tool, comprising:
a tool body; a plurality of blades extending from the tool body; a first blade comprising at least one pointed cutting element thereon, the at least one pointed cutting element comprising a first polycrystalline diamond material on a first carbide substrate, the first polycrystalline diamond material extending away from the first carbide substrate to terminate in a substantially pointed geometry opposite the first carbide substrate; a second blade comprising at least one shear cutting element, the at least one shear cutting element comprising a second polycrystalline diamond material on a second carbide substrate, the second polycrystalline diamond material forming a planar cutting surface opposite the substrate; wherein, when the first blade and the second blade are superimposed on each other, a central axis of the at least one pointed cutting element is offset from a central axis of the at least one shear cutting element. |
地址 |
Houston TX US |