发明名称 |
BIT CONE WITH HARDFACED NOSE |
摘要 |
A drill bit for drilling a wellbore, the drill bit having a cutter which has tungsten carbide inserts and a spear point. The spear point has a neck that joins a smooth portion of the cutter and blades that extend from the neck and converge to an apex. The blades define valleys or spaces between them. A layer of hardfacing is applied to the entire spear point including the interim spaces and the neck.
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申请公布号 |
CA2733255(A1) |
申请公布日期 |
2010.02.18 |
申请号 |
CA20092733255 |
申请日期 |
2009.08.14 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
FELDERHOFF, FLOYD C.;FREEMAN, MARK A.;MASSEY, ALAN J.;GILMORE, KENNETH E.;STANFIELD, GLEN |
分类号 |
E21B10/42;E21B10/46;E21B10/50 |
主分类号 |
E21B10/42 |
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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