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发明名称
Anordninger for tetting av en overgang mellom en brönnboring og en avviksboring
摘要
申请公布号
NO313674(B1)
申请公布日期
2002.11.11
申请号
NO19990000358
申请日期
1999.01.26
申请人
HALLIBURTON ENERGY SERVICES INC
发明人
BOWLING, JOHN S;GANO, JOHN C
分类号
E21B7/08;E21B41/00;(IPC1-7):E21B7/08
主分类号
E21B7/08
代理机构
代理人
主权项
地址
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