Well pipe valve
    1.
    发明授权
    Well pipe valve 失效
    井管阀

    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

    IPC分类号: E21B21/10 F16K15/04 F16K51/00

    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。