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    Ball-type check valve
    1.
    发明授权
    Ball-type check valve 失效
    球形止回阀

    公开(公告)号：US4945947A

    公开(公告)日：1990-08-07

    申请号：US357121

    申请日：1989-05-26

    申请人： Lubbert Westra ,  Brent Lirette

    发明人： Lubbert Westra ,  Brent Lirette

    IPC分类号： F16K15/04

    CPC分类号： F16K15/04 ,  Y10T137/7873 ,  Y10T137/791

    摘要： This invention involves an improved ball-type check valve for use in conditions such as oil and gas drilling which involve abrasive fluids, high pressures, and high temperatures. In this improved check valve, a one-piece ball retainer is provided which consists of (1) a retainer ring for the ball, (2) a base, and (3) at least two vertical supports which connect the retainer ring and the base. Peripheral channels are formed by (a) orifices which pass between the vertical supports, adjoined to (b) recessed areas in the base. This allows the interior passageway (through the retainer ring) to be relatively large in relation to the peripheral channels. This has two effects. When downward flow begins, fluid velocity through the interior passageway is relatively high, which helps ensure rapid settling of the ball on the retainer ring. As downward flow continues through the peripheral channels, the small size of the peripheral channels causes continued high velocity, resulting in a relatively low pressure area below the ball compared to the pressure above the ball. This ensures that the ball remains securely settled on the retainer ring. The entire valve can be assembled in a free-standing housing, or in a standard collar or shoe used in drilling or workover operations. This improved valve is easier and less expensive to manufacture than valves having flexible skirts, and it can be used with any size casing or tubing.

    摘要翻译： 本发明涉及一种改进的球形止回阀，用于诸如石油和天然气钻井的条件，包括磨料流体，高压和高温。 在这种改进的止回阀中，提供了一体式的球保持器，其包括（1）用于球的保持环，（2）基座，和（3）至少两个垂直支撑件，其将保持环和基座 。 外围通道由（a）在垂直支撑件之间通过的孔口，邻接（b）基部中的凹陷区域。 这允许内部通道（通过保持环）相对于外围通道相对较大。 这有两个效果。 当向下流动开始时，通过内部通道的流体速度相对较高，这有助于确保球在保持环上的快速沉降。 当向下的流动继续通过周边通道时，周边通道的小尺寸导致持续的高速度，导致与球之上的压力相比在球下方的相对低的压力区域。 这确保球保持牢固地固定在保持环上。 整个阀门可以组装在一个独立的外壳中，或者用于钻井或修井操作中使用的标准套管或鞋子。 与具有柔性裙板的阀相比，这种改进的阀更容易制造成本更低，并且可以与任何尺寸的套管或管道一起使用。

    Retractable joint and cementing shoe for use in completing a wellbore
    3.
    发明申请
    Retractable joint and cementing shoe for use in completing a wellbore 有权
    用于完井的伸缩缝和固井鞋

    公开(公告)号：US20060185855A1

    公开(公告)日：2006-08-24

    申请号：US11343148

    申请日：2006-01-30

    申请人： John Jordan ,  James Martens ,  R. Colvard ,  Brent Lirette ,  Gregory Galloway ,  David Brunnert

    发明人： John Jordan ,  James Martens ,  R. Colvard ,  Brent Lirette ,  Gregory Galloway ,  David Brunnert

    IPC分类号： E21B19/16

    CPC分类号： E21B17/08 ,  E21B21/10

    摘要： An improved method and/or apparatus for completing a wellbore is provided. In one embodiment, a method of lining a pre-drilled wellbore is provided. The method includes the act of providing a casing assembly, the casing assembly including a string of casing; and a retractable joint comprising an inner tubular and an outer tubular. The method further includes the acts of running the casing assembly into the pre-drilled wellbore and actuating the retractable joint, thereby reducing the length of the casing assembly through movement between the inner and outer tubulars.

    摘要翻译： 提供了一种用于完成井筒的改进的方法和/或装置。 在一个实施例中，提供了衬砌预钻井井筒的方法。 该方法包括提供壳体组件的动作，所述壳体组件包括套管套; 以及包括内管和外管的可收缩接头。 该方法还包括将壳体组件运行到预钻井井筒中并且致动可伸缩接头的动作，从而通过内管和外管之间的运动来减小壳体组件的长度。