发明授权
- 专利标题: Subsurface safety valve
- 专利标题(中): 地下安全阀
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申请号: US068077申请日: 1979-08-20
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公开(公告)号: US4287954A公开(公告)日: 1981-09-08
- 发明人: William F. Krause , Edwin C. Turner
- 申请人: William F. Krause , Edwin C. Turner
- 申请人地址: CA Los Angeles
- 专利权人: Hydril Company
- 当前专利权人: Hydril Company
- 当前专利权人地址: CA Los Angeles
- 主分类号: E21B34/00
- IPC分类号: E21B34/00 ; E21B34/10 ; E21B43/12
摘要:
A subsurface safety valve having a flapper-like pivoting closure element that is moved to and from the open and closed positions by a reciprocating operator assembly. When moved to the open position, the closure element is pivoted out of the flow path to protect it from possible damage.
公开/授权文献
- USD400076S Cabinet latch 公开/授权日:1998-10-27
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