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    • 5. 发明公开
    • APPARATUS FOR AND METHOD OF DEPLOYING A CENTRALIZER INSTALLED ON AN EXPANDABLE CASING STRING
    • 用于在可膨胀套管柱上安装集中器的装置和方法
    • EP2185785A1
    • 2010-05-19
    • EP08781223.6
    • 2008-07-01
    • Frank's International, Inc.
    • BUYTAERT, JeanMILLER, Eugene, Edward
    • E21B17/10E21B43/10
    • E21B17/1028E21B43/103
    • A method of and apparatus for deploying a bow spring centralizer (10) installed on an expandable casing string (30) and restrained in the collapsed configuration by restraining bands (12A, 12B) that rupture, upon expansion of the casing string (30), to deploy the bow spring centralizer (10) and provide stand-off between the expanded casing string (30') and the wall of the borehole. In one embodiment, the bow spring centralizer comprises landings (13) for receiving and retaining the bands (12A, 12B) for restraining the centralizer in the collapsed configuration. In another embodiment, the bands (12A, 12B) are secured to the centralizer (10) to prevent separation of the ruptured bands (12A', 12B') from the deployed centralizer (10').
    • 本发明涉及一种用于展开安装在可膨胀套管柱(30)上的弓形弹簧扶正器(10)的方法和装置,并且通过限制在套管柱(30)膨胀时破裂的带(12A,12B) 以展开弓形弹簧扶正器(10)并且在膨胀的套管柱(30')和钻孔壁之间提供支座。 在一个实施例中,弓形弹簧扶正器包括用于接收和保持用于将扶正器限制在收缩构造中的带(12A,12B)的平台(13)。 在另一个实施例中,带(12A,12B)固定到扶正器(10)以防止破裂带(12A',12B')从展开扶正器(10')分离。