发明授权
- 专利标题: Surface controlled subsurface safety valve downstop seal
- 专利标题(中): 表面控制地下安全阀下压密封
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申请号: US293043申请日: 1999-04-16
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公开(公告)号: US5975212A公开(公告)日: 1999-11-02
- 发明人: Russell A. Johnston
- 申请人: Russell A. Johnston
- 申请人地址: TX Houston
- 专利权人: Camco International Inc.
- 当前专利权人: Camco International Inc.
- 当前专利权人地址: TX Houston
- 主分类号: E21B34/00
- IPC分类号: E21B34/00 ; E21B34/10
摘要:
In a broad aspect, the invention relates to an improved downstop seal for use with a rod-piston actuator of a surface controlled subsurface safety valve, wherein the rod-piston actuator has a beveled shoulder formed thereon. The improved downstop seal has a resilient, primary, sealing member having a beveled sealing surface to matingly engage with a portion of the beveled shoulder of the rod-piston actuator; and further has a non-resilient, secondary, sealing member having a beveled sealing surface to matingly engage with a portion of the beveled shoulder of the rod-piston actuator.
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