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发明名称
APARELHO DE FERRAMENTA DE FUNDO RESPONSIVO AS VARIACOES EM PRESSAO NO ESPACO ANULAR DE UM POCO E PROCESSO DE CONTROLE DO MESMO
摘要
申请公布号
BR9102881(A)
申请公布日期
1992.02.11
申请号
BR1991PI02881
申请日期
1991.07.09
申请人
HALLIBURTON COMPANY
发明人
NEAL G. SKINNER
分类号
E21B19/00;E21B34/00;E21B34/06;E21B34/10;E21B41/00;(IPC1-7):E21B43/00
主分类号
E21B19/00
代理机构
代理人
主权项
地址
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