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发明名称
Recovery of weighting material from a drilling fluid
摘要
申请公布号
US2756965(A)
申请公布日期
1956.07.31
申请号
US19520327364
申请日期
1952.12.22
申请人
PHILLIPS PETROLEUM COMPANY
发明人
HOWE JACK L.
分类号
E21B21/06
主分类号
E21B21/06
代理机构
代理人
主权项
地址
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