发明名称 |
Equalizing flapper for down hole safety valves |
摘要 |
An equalizer valve for a flapper in a subsurface safety valve is described. A tapered plunger is biased by compact spring disposed in the plunger bore. The spring is supported by a C-shaped ring extending into a peripheral groove around the plunger bore.
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申请公布号 |
US2002084076(A1) |
申请公布日期 |
2002.07.04 |
申请号 |
US20010010692 |
申请日期 |
2001.12.05 |
申请人 |
IVES JASON B. |
发明人 |
IVES JASON B. |
分类号 |
E21B34/00;E21B34/10;F16K1/20;F16K39/02;(IPC1-7):E21B34/06 |
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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