| 摘要 |
<p>An apparatus for pipeline isolation comprising a pipeline isolation tool 1 having a cylindrical vessel with locking grips 21 and sealing members 19 encircling the cylindrical vessel. The locking grips 21 and sealing members 19 are operable by a hydraulic piston 10 contained within a core of the cylindrical vessel and a hydraulic pump for operating the piston 10. The piston 10 is a double rodded acting piston 10 comprising an elongated shaft and a head centrally located on the shaft so that the volume swept by the piston 10 is equal in both directions. A control module 32 is connected to the isolation tool 1 at one end and a gauging tool 33 is connected to the other end of the isolation tool 1.</p> |
