| 发明名称 |
Subsea riser and flotation means therefor |
| 摘要 |
A marine drilling riser is provided with a plurality of buoyancy cans having fail safe dump valves operative to vent compressed gas from the buoyancy cans and thereby cause rapid loss of buoyancy.
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| 申请公布号 |
US4176986(A) |
申请公布日期 |
1979.12.04 |
| 申请号 |
US19770848170 |
申请日期 |
1977.11.03 |
| 申请人 |
EXXON PRODUCTION RESEARCH |
发明人 |
HEILHECKER, JOE K;TAFT, DANIEL G |
| 分类号 |
B63B22/02;E21B17/01;(IPC1-7):E21B7/12 |
主分类号 |
B63B22/02 |
| 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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