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公开(公告)号:US3776258A
公开(公告)日:1973-12-04
申请号:US3776258D
申请日:1972-03-20
申请人: B & W INC
发明人: DOCKINS R
CPC分类号: F16K15/046 , E21B21/10 , F16K15/04 , Y10T137/5109 , Y10T137/7873 , Y10T137/7879 , Y10T137/791
摘要: A valve for use in a well pipe string including an apertured diaphragm for producing a variable restriction in fluid flow through the valve for controlled filling while running the well pipe and an expandable tapered valve seat for cooperating with a ball to allow the ball to pass downwardly through the valve seat to convert the valve to a reverse flow check valve to prevent subsequent upward flow of fluid through the valve.
摘要翻译: 一种用于井管柱的阀,包括孔径隔膜,用于在运行井管时产生用于受控填充的阀的流体流量的可变限制,以及用于与球配合以允许球向下通过的可膨胀锥形阀座 通过阀座将阀转换成逆流止回阀,以防止随后向上流动流体通过阀。