Cement control ring
    9.
    发明授权
    Cement control ring 失效
    水泥控制环

    公开(公告)号:US07255174B2

    公开(公告)日:2007-08-14

    申请号:US10888317

    申请日:2004-07-09

    申请人: Grant R. Thompson

    发明人: Grant R. Thompson

    IPC分类号: E21B34/14

    CPC分类号: E21B34/102

    摘要: A sealing system for a flow tube keeps cement from getting around it to the flapper when the safety valve is in the open position. Seals are provided at opposed ends of the flow tube so that the power spring and the flapper will not get fouled with cement pumped through the flow tube in wells that are completed through a production string with the safety valve in place. The seals may be mounted to the flow tube or the surrounding body. A unique seal construction separates cement from the flapper behind the flow tube. The force acting on the flow tube to hold the valve open also helps to apply a force against the lower seal adjacent the flapper.

    摘要翻译: 当安全阀处于打开位置时,用于流管的密封系统使水泥不会靠近挡板。 密封件设置在流动管的相对端处,使得动力弹簧和挡板不会被水泥泵送的水泥泵入通过安全阀就位的生产线中完成的井中的流动管。 密封件可以安装到流动管或周围的主体。 独特的密封结构将水泥与流管后面的挡板分开。 作用在流动管上以保持阀打开的力也有助于在挡板附近向下密封件施加力。

    Sand control seal for subsurface safety valve
    10.
    发明授权
    Sand control seal for subsurface safety valve 有权
    地下安全阀防砂密封

    公开(公告)号:US06607037B2

    公开(公告)日:2003-08-19

    申请号:US09912689

    申请日:2001-07-24

    申请人: Grant R. Thompson

    发明人: Grant R. Thompson

    IPC分类号: E21B3414

    CPC分类号: E21B34/106 E21B34/10

    摘要: A seal is provided to prevent contamination by sand or grit in the clearance between a flow tube and the inner housing wall in a safety valve. An enlarged space is provided adjacent the seal to allow accumulation of sand or grit in the annular clearance space without causing seizure of the flow tube. The insert safety valve is assembled without a spacer with a seal mounted to the lower end of the insert valve to engage the bottom sub on the SSV. As a result, particularly for larger sizes of insert safety valves, the assembly is lighter and shorter, which facilitates use of readily available standard lubricator and wireline equipment.

    摘要翻译: 提供密封件以防止在安全阀中流动管和内壳体壁之间的间隙中的沙子或砂砾被污染。 在密封件附近设置有扩大的空间,以允许将沙子或砂砾积聚在环形间隙空间中,而不会引起流管的卡塞。 插入式安全阀在没有间隔件的情况下组装,密封件安装在插入阀的下端以接合SSV上的底部。 因此,特别是对于较大尺寸的插入式安全阀,组件更轻更短,便于使用易于获得的标准润滑器和电缆设备。