Well completion system and method
    55.
    发明授权
    Well completion system and method 失效
    完井系统和方法

    公开(公告)号:US5743335A

    公开(公告)日:1998-04-28

    申请号:US534552

    申请日:1995-09-27

    Inventor: Terry R. Bussear

    CPC classification number: E21B33/16 E21B43/10

    Abstract: The method includes running a liner, production packer and polished bore receptacle (PBR) into a well on the production tubing string, cementing the liner in place by pumping cement through the production tubing string, setting the packer, and optionally thereafter releasing an upper portion of the tubing string from a PBR. A seal assembly isolates the PBR bore from cement exposure during liner cementation. Annular pressure produces a reverse fluid surge and circulating flow to prevent PBR seal area contamination when the tubing string is lifted away from the PBR. A connecting assembly 12 is suspended from a production tubing string 11 to position a liner 17 in a wellbore. The connecting assembly transmits rotational and longitudinal forces from the production tubing string to properly position and cement the liner in the wellbore. The connecting assembly includes a device 20 to limit torque forces on the tubing string, and a longitudinal slip mechanism 28 permits limited longitudinal movement between the connecting assembly and tubing string. A packer 15 is set to seal between the production tubing string 11 and the well casing. An extended length of tubing 11a extends below the packer to provide a continuous tubing/liner-casing overlap area for cementation.

    Abstract translation: 该方法包括将衬管,生产封隔器和抛光孔容器(PBR)运行到生产油管柱上的井中,通过将水泥泵送通过生产油管柱固定衬垫到位,设置封隔器,以及随后释放上部 的管柱。 密封组件在衬垫固化期间将PBR孔与水泥暴露隔离。 环形压力产生反向流体浪涌和循环流动,以防止当管柱从PBR提起时PBR密封区域被污染。 连接组件12从生产油管柱11悬挂以将衬套17定位在井眼中。 连接组件从生产油管柱传递旋转和纵向力,以适当地定位并将衬套粘结在井眼中。 连接组件包括用于限制油管柱上的扭矩力的装置20,并且纵向滑动机构28允许在连接组件和油管柱之间的有限纵向运动。 封隔器15被设置为在生产油管柱11和井套管之间进行密封。 管道11a的延伸长度延伸到封隔器下方,以提供用于胶结的连续的管道/衬套 - 套管重叠区域。

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