发明授权
- 专利标题： Manufacturing methods for high shear roller cone bits
- 专利标题（中）： 高剪切辊锥钻头的制造方法
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申请号： US12844589申请日： 2010-07-27
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公开(公告)号： US08955413B2公开(公告)日： 2015-02-17
- 发明人: Rahul Bijai , Zhehua Zhang , Vikrant Bhadbhade , Prabhakaran K. Centala
- 申请人： Rahul Bijai , Zhehua Zhang , Vikrant Bhadbhade , Prabhakaran K. Centala
- 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
- 代理机构： Osha Liang LLP
- 主分类号： B21K5/04
- IPC分类号： B21K5/04 ; B23P15/32 ; E21B10/08 ; E21B10/20 ; E21B10/50
摘要：
A method of manufacturing a roller cone drill bit may include forming a body of a single piece having an upper end and a lower end; machining at the lower end of the body at least two journals extending downward and radially outward from a central axis of the body; machining at least one of a ball passage, a hydraulic fluid passageway, a grease reservoir, and a lubricant passageway; and mounting roller cones on the at least two journals.
公开/授权文献
- US20110023663A1 MANUFACTURING METHODS FOR HIGH SHEAR ROLLER CONE BITS 公开/授权日：2011-02-03
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