发明名称 |
EARTH-BORING TOOLS ATTACHABLE TO A CASING STRING AND METHODS FOR THEIR MANUFACTURE |
摘要 |
<p>Casing bits include a crown having a substantially hollow interior. The bit crown has blades over a face portion thereof, the blades including a plurality of cutting elements attached thereto. The bit crown further includes a composite inlay (85) positioned at least within the substantially hollow interior. Casing bits also include case hardened outer surfaces radially outside the drill-out region. Casing bits further include short- substrate cutting elements. Methods of forming a casing bit are also disclosed.</p> |
申请公布号 |
CA2705565(A1) |
申请公布日期 |
2009.05.22 |
申请号 |
CA20082705565 |
申请日期 |
2008.11.14 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
MCCLAIN, ERIC E.;ISBELL, MATTHEW R.;OLDHAM, JACK THOMAS;THOMAS, JOHN CLAYTON;BIRD, MARC W. |
分类号 |
E21B7/20;E21B10/42;E21B10/64 |
主分类号 |
E21B7/20 |
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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