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发明名称
Wellhead annulus seal assembly
摘要
申请公布号
AU2011200225(A1)
申请公布日期
2011.08.04
申请号
AU20110200225
申请日期
2011.01.20
申请人
VETCO GRAY INC.
发明人
DUONG, KHANH A.
分类号
E21B33/128;E21B33/04
主分类号
E21B33/128
代理机构
代理人
主权项
地址
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