| 发明名称 |
SIKKERHETSVENTIL MOT UTBLAASING. |
| 摘要 |
<p>A ram-type blowout preventer for use in the drilling of onshore and offshore wells, having secondary plastic injection sealing means whereby, on failure of the conventional ram seal, a well closure may still be ensured for protection of human life, equipment and the environment.</p> |
| 申请公布号 |
NO791915(A) |
申请公布日期 |
1980.02.19 |
| 申请号 |
NO19790001915 |
申请日期 |
1979.06.08 |
| 申请人 |
CAMERON IRON WORKS, INC., |
发明人 |
WILLIAMS, LEONARD E., JR., |
| 分类号 |
E21B33/06;F16J15/14;(IPC1-7):21B/ |
主分类号 |
E21B33/06 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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