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    • 43. 发明授权
    • Inflatable borehole plug assemblies
    • 充气钻孔塞组件
    • US5346005A
    • 1994-09-13
    • US996185
    • 1992-12-23
    • Geoffrey Robbins
    • Geoffrey Robbins
    • E21B33/127F42D1/18E21B33/00
    • E21B33/1277E21B33/127F42D1/18
    • The invention relates to inflatable borehole plug assemblies wherein the time required for their inflation may be controlled. In particular, the invention enables inflatable borehole plug assemblies to be lowered to a preselected depth in a borehole before inflation occurs. The inflatable borehole plug assemblies of the invention include a sealed gas-tight inflatable container containing a pressurised vessel having a pressure release valve. The pressurised vessel contains an inflating substance and a time delay liquid, and is adapted so that on operation of the pressure release valve: (i) the time delay liquid is discharged from the pressurised vessel, thereby causing a time delay between the operation of the pressure release valve and discharge of the inflating substance from the pressurised vessel, and (ii) after the time delay liquid has been discharged the inflating substance is discharged, thereby inflating the inflatable container to form a borehole plug.
    • 本发明涉及可充气钻孔塞组件,其中可以控制其充气所需的时间。 特别地,本发明使得可膨胀的钻孔塞组件在膨胀发生之前被降低到钻孔中的预选深度。 本发明的可充气钻孔塞组件包括密封的气密充气容器,其包含具有压力释放阀的加压容器。 加压容器包含充气物质和延时液体,并且适于使得在压力释放阀的操作时:(i)延时液体从加压容器排出,从而导致操作之间的时间延迟 压力释放阀和膨胀物质从加压容器排放,以及(ii)在延时液体已经排出之后,排出膨胀物质,从而使充气容器膨胀以形成钻孔塞。