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发明名称
DOWNHOLE TOOL WITH MEANS FOR INJECTING PRESSURISED GAS INTO A COMPRESSION CHAMBER TO ACT AS A COMPRESSIBLE FLUID SPRING
摘要
申请公布号
AU571118(B2)
申请公布日期
1988.03.31
申请号
AU19850049776
申请日期
1985.11.12
申请人
HALLIBURTON CO.,
发明人
HAROLD KENT BECK
分类号
E21B34/00;E21B34/10;E21B49/00;(IPC1-7):E21B49/00
主分类号
E21B34/00
代理机构
代理人
主权项
地址
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