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11. 发明授权

US5343953A Through-tubing recirculating tool assembly for well completions 失效
标题翻译：管道循环工具组件，用于完井
公开(公告)号：US5343953A
公开(公告)日：1994-09-06
申请号：US110851
申请日：1993-08-24
申请人： Dhirajlal C. Patel , Tommy F. Grigsby
发明人： Dhirajlal C. Patel , Tommy F. Grigsby
IPC分类号： E21B17/06 , E21B23/04 , E21B37/08 , E21B43/04 , E21B47/09 , E21B37/04
CPC分类号： E21B17/06 , E21B23/04 , E21B37/08 , E21B43/04 , E21B47/091
摘要： A recirculating tool assembly is lowered on a length of coil tubing into the production tubing of a well completion to a location above side wall perforations in the production tubing which have become obstructed. The tool assembly includes an upper tool portion telescoped into and releasably latched within a lower sealing and tubing extension portion. Recirculating fluid is pumped down the coil tubing, flowed through a first tool assembly passage, and downwardly discharged into the production tubing. A portion of the discharged fluid is forced outwardly through the production tubing perforations to remove the obstructions therefrom, and the remainder of the discharged fluid is forced upwardly through a second tool assembly passage into the annulus between the coil tubing and the production tubing for return to the surface. After this recirculation process is completed the upper tool assembly portion is unlatched from the lower assembly portion, using fluid pressure within the coil tubing, and removed from the production tubing. An alternate embodiment of the tool assembly is used to form a gravel pack internally around additional perforations formed in the production tubing before the tool assembly is lowered into place therein. After the upper tool assembly portion is unlatched and removed, production fluid flows into the production tubing through these additional perforations and then flows into the lower portion of the tool assembly, through a sand screen structure carried thereon, for delivery to the surface.
摘要翻译：循环工具组件在一定长度的线圈管上下降到完井的生产管道中，该管道已经被堵塞在生产管道中的侧壁穿孔上方。工具组件包括可伸缩并可释放地锁定在下部密封和管道延伸部分内的上部工具部分。再循环流体被卷绕在线圈管上，流过第一工具组合通道，并向下排放到生产管道中。排出的流体的一部分被迫向外通过生产管道穿孔以从其中移除阻塞物，并且排出的流体的其余部分被向上推动通过第二工具组件通道进入盘管和生产管道之间的环形空间，以返回到表面。在该再循环过程完成之后，利用线圈管内的流体压力将上部工具组件部分从下部组件部分解开，并从生产管道中移除。工具组件的替代实施例用于在工具组件下降到位之前在生产管道中形成的附加穿孔内部形成砾石包装。在上部工具组装部分被解锁和移除之后，生产流体通过这些附加的穿孔流入生产管道，然后通过其上承载的砂筛结构流入工具组件的下部，以输送到表面。

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