EXTERNAL, DIVORCED PDC BEARING ASSEMBLIES FOR HYBRID DRILL BITS
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机译:混合钻头的外部,分开的PDC轴承组件
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摘要
A hybrid-type earth boring drill bit is described having fixed cutting blades and rolling cones with cutting elements, wherein the rolling cones are associated with a spindle assembly that may be optionally divorced from the head pin assembly, and which includes bearing members that further include a plurality of polycrystalline diamond elements.
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