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发明名称
APARELHO E CABECA DE CIMENTACAO E TORNEL PARA USO COM UM POCO
摘要
申请公布号
BR9005941(A)
申请公布日期
1991.09.24
申请号
BR1990PI05941
申请日期
1990.11.23
申请人
HALLIBURTON COMPANY
发明人
MORRIS G. BALDRIDGE
分类号
E21B17/05;E21B33/04;E21B33/05;E21B33/16;F16L27/08;(IPC1-7):E21B34/02
主分类号
E21B17/05
代理机构
代理人
主权项
地址
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