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    • 4. 发明授权
    • Subsurface annular safety barrier
    • 地下环形安全栅
    • US07140447B2
    • 2006-11-28
    • US10702883
    • 2003-11-06
    • Peter KrawiecDwayne D. LeismerYouel G. Hilsman
    • Peter KrawiecDwayne D. LeismerYouel G. Hilsman
    • E21B33/12
    • E21B33/12
    • A subsurface annular safety barrier including a tubing disposed within a wellbore casing forming a casing-tubing annulus to allow fluid flow from and/or to a subterranean formation, and an annular barrier carried by the tubing and positioned in the casing-tubing annulus proximate the top of a formation, separating communication between the formation and the upper portion of the casing-tubing annulus above the annular barrier, wherein the annular barrier is set in an open position to allow fluid communication between the formation and the upper portion of the casing-tubing annulus and operationally activatable, without mechanical manipulation of a pipe string, to a closed position to prevent undesired fluid flow between the formation and upper portion of the casing-tubing annulus.
    • 一种地下环形安全屏障,包括设置在井眼外壳内的管道,形成套管 - 管道环,以允许流体从地层和/或地下地层流出,以及由管道承载的环形挡板,并定位在靠近 将所述地层与所述套管 - 管道环的上部之间的连通分隔在所述环形阻挡物之上,其中所述环形阻挡件设置在打开位置以允许所述地层和所述壳体 - 管环之间的流体连通, 管环形和可操作地激活,而不需要管道管的机械操纵,到闭合位置,以防止在套管 - 管道环的地层和上部之间不期望的流体流动。