发明名称 |
Stepped polycrystalline diamond compact insert |
摘要 |
The present invention addresses this need in the art by providing a cutter insert comprising a plug section and a cutter pedestal. The cutter insert is preferably formed of tungsten carbide, except for two exterior surfaces covered with PDC. The plug section may be circular or oval in cross section perpendicular to the axis of the insert. The plug section and the pedestal each defines a shoulder which is coated with a PDC layer. In this way, two cutting surfaces are applied to the formation, enhancing the cutting ability of the insert.
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申请公布号 |
US7140448(B2) |
申请公布日期 |
2006.11.28 |
申请号 |
US20050151766 |
申请日期 |
2005.06.14 |
申请人 |
ULTERRA DRILLING TECHNOLOGIES, L.P. |
发明人 |
ESTES ROY;CASTLE JOHNNY |
分类号 |
E21B10/36;E21B10/56;E21B10/567;E21B10/573 |
主分类号 |
E21B10/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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