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公开(公告)号：US5725313A
公开(公告)日：1998-03-10
申请号：US506993
申请日：1995-07-28
CPC分类号： E21B10/22 , F16C33/043 , F16C17/04 , F16C17/18 , F16C2352/00
摘要： A rolling cutter drill bit comprises a body and three legs, each leg having a cantilevered bearing spindle, a rolling cutter rotatably mounted on the bearing spindle, lubricant delivering means within the beating spindle, and a floating thrust bearing element configured to carry onward thrust loads from the rolling cutter onto the bearing spindle. Each floating thrust bearing element is formed of a wrought alloy material consisting primarily of chromium carbide and cobalt and having a yield strength of less than 120,000 psi and a ductility of at least 4%, both at room temperature.
摘要翻译： 滚动刀具钻头包括主体和三个腿部，每个腿部具有悬臂轴承主轴，可旋转地安装在轴承主轴上的滚动切割器，在打浆主轴内的润滑剂输送装置和构造成承载向后推力负载的浮动推力轴承元件 从滚动切割机到轴承主轴。 每个浮动止推轴承元件由主要由碳化铬和钴组成的锻造合金材料形成，并且在室温下具有小于120,000psi的屈服强度和至少4％的延展性。
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公开(公告)号：US06354740B1
公开(公告)日：2002-03-12
申请号：US08971504
申请日：1997-11-17
IPC分类号： F16C1704
CPC分类号： F16C17/04 , E21B10/22 , F16C33/121 , F16C2352/00 , Y10S384/912 , Y10S384/913
摘要： A rolling cutter drill bit comprises a body and three legs, each leg having a cantilevered bearing spindle, a rolling cutter rotatably mounted on the bearing spindle, lubricant delivering means within the bearing spindle, and a floating thrust bearing element configured to carry onward thrust loads from the rolling cutter onto the bearing spindle. Each floating thrust bearing element is formed of a wrought alloy material consisting primarily of chromium carbide and cobalt and having a yield strength of less than 120,000 psi and a ductility of at least 4%, both at room temperature.
摘要翻译： 轧机钻头包括主体和三个腿部，每个腿部具有悬臂轴承主轴，可旋转地安装在轴承主轴上的滚动切割器，轴承主轴内的润滑剂输送装置和构造成承载向前推力负载的浮动推力轴承元件 从滚动切割机到轴承主轴。 每个浮动止推轴承元件由主要由碳化铬和钴组成的锻造合金材料形成，并且在室温下具有小于120,000psi的屈服强度和至少4％的延展性。
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