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发明名称
WELLHEAD SEALING SYSTEM
摘要
申请公布号
AU575571(B2)
申请公布日期
1988.08.04
申请号
AU19840030754
申请日期
1984.07.17
申请人
BRALORNE RESOURCES LIMITED
发明人
CLARENCE WILLIAM JOHNSON
分类号
E21B33/02;E21B33/00;E21B33/03;E21B33/04;F16J15/48;F16L17/035;(IPC1-7):E21B33/04;E21B33/068;F16J15/32;F16J15/46
主分类号
E21B33/02
代理机构
代理人
主权项
地址
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