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经营范围
发明名称
Circulating whipstock
摘要
申请公布号
US3378087(A)
申请公布日期
1968.04.16
申请号
US19660568888
申请日期
1966.07.29
申请人
J. S. COCHRAN, JR.
发明人
LEISSLER LEE ROSS
分类号
E21B7/06;E21B7/08
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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