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发明名称
Shock isolator for rotary drill string
摘要
申请公布号
US3263446(A)
申请公布日期
1966.08.02
申请号
US19630303327
申请日期
1963.08.20
申请人
ESSO PRODUCTION RESEARCH COMPANY
发明人
JR. JOHN H. WIGGINS,
分类号
E21B17/07;F16D3/74
主分类号
E21B17/07
代理机构
代理人
主权项
地址
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