| 发明名称 |
SUBSURFACE SAFETY VALVE |
| 摘要 |
<p>A surface controlled subsurface safety valve having a ball type valve closure. The ball member and its associated components are protected from damage by preventing excessive control fluid pressure from applying force to the ball member. Also, rotation of the ball member is prevented until any difference in pressure across the ball member and its seating surface has decreased below a preselected safe value.</p> |
| 申请公布号 |
GB2116603(A) |
申请公布日期 |
1983.09.28 |
| 申请号 |
GB19830000355 |
申请日期 |
1983.01.07 |
| 申请人 |
* OTIS ENGINEERING CORPORATION |
发明人 |
STEVEN C * SPEEGLE;KENNETH L * SCHWENDEMANN;MICHAEL B * VINZANT |
| 分类号 |
E21B34/00;E21B34/10;(IPC1-7):21B34/10 |
主分类号 |
E21B34/00 |
| 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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