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发明名称
Brönnsirkulasjonssystem
摘要
申请公布号
NO20024130(A)
申请公布日期
2002.10.25
申请号
NO20020004130
申请日期
2002.08.30
申请人
WEATHERFORD/LAMB INC
发明人
ALLEN, JOHN TIMOTHY;BOX, STEVEN ANTONY;PIETRAS, BERND-GEORG;HABETZ, JEFFREY MICHAEL
分类号
E21B3/04;E21B17/00;E21B19/10;E21B19/16;E21B19/24;E21B21/01;E21B21/10;E21B33/068;(IPC1-7):E21B
主分类号
E21B3/04
代理机构
代理人
主权项
地址
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