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1. 发明申请

US20090044984A1 Corrosion Protection for Head Section of Earth Boring Bit 有权
标题翻译：镗孔头部防腐蚀
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。

2. 发明授权

US07823664B2 Corrosion protection for head section of earth boring bit 有权
标题翻译：镗孔头部防腐蚀
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。

3. 发明授权

US07484577B2 Bit leg outer surface hardfacing on earth-boring bit 有权
标题翻译：位腿外表面硬化地面钻孔
公开(公告)号：US07484577B2
公开(公告)日：2009-02-03
申请号：US11709439
申请日：2007-02-22
申请人： James L. Overstreet , Robert J. Buske , John F. Bradford, III , Caleb A. Rickabaugh
发明人： James L. Overstreet , Robert J. Buske , John F. Bradford, III , Caleb A. Rickabaugh
IPC分类号： E21B10/50
CPC分类号： E21B10/08
摘要： An earth-boring bit has bit legs having hardfacing covering the majority of the outer surface. The hardfacing may have gaps at an area surrounding the ball plug and an area around a fixture dimple. The hardfacing may be multi-layer, with the layers differing in composition. Recesses may be located at the leading and trailing edges of the supporting metal so as to provide a thicker area of hardfacing at these corners. The supporting metal of the outer surface of the bit leg may also have an upper cylindrical section and a lower tapered section. The hardfacing has a constant outer diameter but will taper in thickness in the lower tapered section. The thickness of the hardfacing may also vary in a circumferential direction with a greater thickness over at least one of the corners.
摘要翻译：钻孔钻头具有覆盖大部分外表面的耐磨面。表面硬化在球塞周围的区域和夹具凹坑周围的区域可能具有间隙。表面硬化可以是多层，组合不同。凹部可以位于支撑金属的前缘和后缘，以便在这些拐角处提供较厚的表面硬化面积。钻头腿的外表面的支撑金属也可以具有上圆柱形部分和下锥形部分。表面硬化具有恒定的外径，但在下锥形部分中的厚度将逐渐变细。表面硬化的厚度也可以在圆周方向上变化，并且在至少一个拐角上具有更大的厚度。

4. 发明授权

US07905301B2 Earth boring drill bits made from a low-carbon, high-molybdenum alloy 有权
标题翻译：地球钻头由低碳高钼合金制成
公开(公告)号：US07905301B2
公开(公告)日：2011-03-15
申请号：US12166954
申请日：2008-07-02
申请人： Carmel Z. El Hakam , Eric C. Sullivan , John F. Bradford, III , Don Q. Nguyen
发明人： Carmel Z. El Hakam , Eric C. Sullivan , John F. Bradford, III , Don Q. Nguyen
IPC分类号： E21B10/46
CPC分类号： C22C38/04 , C21D9/22 , C22C38/02 , C22C38/06 , C22C38/44
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。

5. 发明申请

US20090008154A1 Earth Boring Drill Bits Made From A Low-Carbon, High-Molybdenum Alloy 有权
标题翻译：低碳，高钼合金地球钻孔钻头
公开(公告)号：US20090008154A1
公开(公告)日：2009-01-08
申请号：US12166954
申请日：2008-07-02
申请人： Carmel Z. El Hakam , Eric Sullivan , John F. Bradford, III , Don Q. Nguyen
发明人： Carmel Z. El Hakam , Eric Sullivan , John F. Bradford, III , Don Q. Nguyen
IPC分类号： E21B10/00 , C22C1/10
CPC分类号： C22C38/04 , C21D9/22 , C22C38/02 , C22C38/06 , C22C38/44
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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