发明授权
- 专利标题: Subsurface annulus safety valve
- 专利标题(中): 表面安全阀
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申请号: US673928申请日: 1976-04-05
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公开(公告)号: US4049052A公开(公告)日: 1977-09-20
- 发明人: Henry P. Arendt
- 申请人: Henry P. Arendt
- 申请人地址: TX Dallas
- 专利权人: Otis Engineering Corporation
- 当前专利权人: Otis Engineering Corporation
- 当前专利权人地址: TX Dallas
- 主分类号: E21B34/00
- IPC分类号: E21B34/00 ; E21B34/10 ; E21B23/00 ; E21B43/12
摘要:
Disclosed is a safety system to control flow within a well which includes an annulus safety valve to control flow in the annulus between concentric well pipe and which may include a tubing safety valve to control flow in the inner pipe.
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