- 专利标题： Corrosion Protection for Head Section of Earth Boring Bit
- 专利标题（中）： 镗孔头部防腐蚀
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申请号： US12191915申请日： 2008-08-14
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公开(公告)号： US20090044984A1公开(公告)日： 2009-02-19
- 发明人: Alan J. Massey , David K. Luce , Eric Sullivan , John F. Bradford, III , Carmel Z. El Hakam , James L. Overstreet , Ajay V. Kulkarni
- 申请人： Alan J. Massey , David K. Luce , Eric Sullivan , John F. Bradford, III , Carmel Z. El Hakam , James L. Overstreet , Ajay V. Kulkarni
- 申请人地址： US TX Houston
- 专利权人： Baker Hughes Incorporated
- 当前专利权人： Baker Hughes Incorporated
- 当前专利权人地址： US TX Houston
- 主分类号： E21B10/62
- IPC分类号： E21B10/62
摘要：
An earth boring bit has a steel body having at least one leg with a depending bearing pin. A cone having cutting elements is rotatably mounted to the bearing pin. A ball plug weld is on the outer surface of the leg. A layer of hardfacing applied to part of the outer surface of the leg, the hardfacing having carbide particles in a matrix. A corrosion resistant coating containing at least 50% nickel is formed on parts of the outer surface of the leg that are free of the layer of hardfacing both above and below the ball plug weld.
公开/授权文献
- US07823664B2 Corrosion protection for head section of earth boring bit 公开/授权日：2010-11-02