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公开(公告)号：US20090044984A1
公开(公告)日：2009-02-19
申请号：US12191915
申请日：2008-08-14
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
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
IPC分类号： E21B10/62
CPC分类号： E21B10/46 , C23C30/005 , E21B10/08
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.
摘要翻译： 地镗头具有至少一个具有从动轴承销的支脚的钢体。 具有切割元件的锥体可旋转地安装在轴承销上。 球塞的外表面上有一个球塞。 一层表面硬化施加到腿的外表面的一部分，表面硬化具有碳化物颗粒在基质中。 在腿部外表面的没有球塞焊缝上方和下方的耐磨层层的部分上形成含有至少50％镍的耐腐蚀涂层。
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公开(公告)号：US07823664B2
公开(公告)日：2010-11-02
申请号：US12191915
申请日：2008-08-14
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
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
IPC分类号： E21B10/46
CPC分类号： E21B10/46 , C23C30/005 , E21B10/08
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.
摘要翻译： 地镗头具有至少一个具有从动轴承销的支脚的钢体。 具有切割元件的锥体可旋转地安装在轴承销上。 球塞的外表面上有一个球塞。 一层表面硬化施加到腿的外表面的一部分，表面硬化具有碳化物颗粒在基质中。 在腿部外表面的没有球塞焊缝上方和下方的耐磨层层的部分上形成含有至少50％镍的耐腐蚀涂层。
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公开(公告)号：US20090008154A1
公开(公告)日：2009-01-08
申请号：US12166954
申请日：2008-07-02
摘要： An earth boring bit formed from an alloy comprising a low carbon content and high molybdenum content is disclosed herein. The molybdenum content is greater than about 0.8% to about 1.15% by weight of the alloy. The carbon content may range up to about 0.16% by weight of the alloy. The alloy may further comprise alloy further comprises manganese, phosphorus, sulfur, silicon, nickel, chromium, copper, aluminum, vanadium, and calcium; with the balance being iron. The alloy experiences a relatively flattened hardenability curve and low martinsite formation.
摘要翻译： 本文公开了由包含低碳含量和高钼含量的合金形成的钻孔钻头。 钼含量大于合金重量的约0.8％至约1.15％。 碳含量可以高达合金重量的约0.16％。 合金还可以包含锰，磷，硫，硅，镍，铬，铜，铝，钒和钙; 平衡是铁。 该合金经历相对扁平的淬透性曲线和低的马氏体组成。
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公开(公告)号：US07905301B2
公开(公告)日：2011-03-15
申请号：US12166954
申请日：2008-07-02
IPC分类号： E21B10/46
摘要： An earth boring bit formed from an alloy comprising a low carbon content and high molybdenum content is disclosed herein. The molybdenum content is greater than about 0.8% to about 1.15% by weight of the alloy. The carbon content may range up to about 0.16% by weight of the alloy. The alloy may further comprise alloy further comprises manganese, phosphorus, sulfur, silicon, nickel, chromium, copper, aluminum, vanadium, and calcium; with the balance being iron. The alloy experiences a relatively flattened hardenability curve and low martinsite formation.
摘要翻译： 本文公开了由包含低碳含量和高钼含量的合金形成的钻孔钻头。 钼含量大于合金重量的约0.8％至约1.15％。 碳含量可以高达合金重量的约0.16％。 合金还可以包含锰，磷，硫，硅，镍，铬，铜，铝，钒和钙; 平衡是铁。 该合金经历相对扁平的淬透性曲线和低的马氏体组成。
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