发明申请
- 专利标题： PLACEMENT OF CUTTING ELEMENTS ON SECONDARY CUTTING STRUCTURES OF DRILLING TOOL ASSEMBLIES
- 专利标题（中）： 钻孔工具组件二次切割结构切割元件的放置
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申请号： US12179469申请日： 2008-07-24
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公开(公告)号： US20100018779A1公开(公告)日： 2010-01-28
- 发明人: Navish Makkar , Wei Tang , Gordon Whipple , Tommy Laird , Gail Nelson
- 申请人： Navish Makkar , Wei Tang , Gordon Whipple , Tommy Laird , Gail Nelson
- 申请人地址： US TX Houston
- 专利权人： SMITH INTERNATIONAL, INC.
- 当前专利权人： SMITH INTERNATIONAL, INC.
- 当前专利权人地址： US TX Houston
- 主分类号： E21B10/00
- IPC分类号： E21B10/00
摘要：
A secondary cutting structure for sure in a drilling assembly, the secondary cutting structure including a tubular body and a block, extendable from the tubular body, the block including a first arrangement of cutting elements disposed on a first blade and a second arrangement of cutting elements disposed on a second blade, wherein the second arrangement is a modified redundant arrangement. Also, a secondary cutting structure for use in a drilling assembly, the secondary cutting structure including a leading blade disposed on a first block and a trailing blade disposed on the first block adjacent the leading blade. Additionally, the secondary cutting structure includes a unique blade disposed on a second block, wherein a gage portion of at least one of the blades has a length between 30% and 45% of a total blade length.
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