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发明名称
DRILL BIT INSERT
摘要
<p>A protruding insert for use in an oil well drill bit is disclosed which insert is made of a hard metal substance and utilizes a tangential spherical surface having opposed flattened sides.</p>
申请公布号
CA1092594(A)
申请公布日期
1980.12.30
申请号
CA19790327661
申请日期
1979.05.15
申请人
REED TOOL COMPANY
发明人
SHAY, WILLIAM, JR.
分类号
E21B10/52;E21B10/56;(IPC1-7):21B9/36;21C13/01
主分类号
E21B10/52
代理机构
代理人
主权项
地址
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