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发明名称
SUBSEA WELLHEAD
摘要
申请公布号
GB2243385(A)
申请公布日期
1991.10.30
申请号
GB19910008027
申请日期
1991.04.16
申请人
* VETCO GRAY INC
发明人
LIONEL JOHN * MILBERGER;HERMAN O * ANDERSON JR;STANLEY * HOSIE
分类号
E21B33/035;E21B33/038
主分类号
E21B33/035
代理机构
代理人
主权项
地址
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