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发明名称
Drilling
摘要
申请公布号
US3043255(A)
申请公布日期
1962.07.10
申请号
US19570685686
申请日期
1957.09.23
申请人
SHELL OIL COMPANY;CONTINENTAL OIL COMPANY;THE SUPERIOR OIL COMPANY;UNION OIL COMPANY OF CALIFORNIA
发明人
BAUER ROBERT F.;STRATTON HAL
分类号
E21B15/02
主分类号
E21B15/02
代理机构
代理人
主权项
地址
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