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    • 8. 发明申请
    • THRUSTER PIG
    • 电击枪
    • WO2006001707A1
    • 2006-01-05
    • PCT/NO2005/000223
    • 2005-06-23
    • STATOIL ASACRAWFORD TECHNICAL SERVICES INC.KINNARI, Keijo, J.LABES-CARRIER, CatherineCRAWFORD, Jim, Bob
    • KINNARI, Keijo, J.LABES-CARRIER, CatherineCRAWFORD, Jim, Bob
    • E21B23/08
    • F16L55/38
    • Thruster pig for sending through a pipe from an entrance facility to a receiving location, for servicing or monitoring, by pumping a thrusting fluid into the pipe to force the pig forwards into the pipe, said thruster pig comprising: a body having a front end and a back end, which back end includes a reaction surface to which said thrusting fluid applies a motive force, said body having a diameter slightly smaller than the inner diameter of the pipe, a seal circumferentially arranged on the pig to seal between said body and said pipe, a connector for releasable connection of a return flow line to the pig, said connector including a shifting mandrel that is activated to open the connector by pumping a ball through the return flow line, said ball being retained in the return flow line after opening the connector, a blanking device arranged to blank a bore left as the return flow line is disconnected; such that said thruster pig and any connected servicing or monitoring equipment is operable by pumping a fluid into the annulus between the pipe and the return flow line while returning fluid through said return flow line as required to maintain a differential pressure over said pig to urge said pig forwards through the pipe, while at any point said return flow line can be disconnected from the pig and retrieved to the entrance end and the blanked pig can be urged forwards to a pig receiving location by pumping or directing fluid into the pipe. A thruster pig system for hydrate removal is an embodiment of the invention.
    • 推进器猪,其通过管道从入口设施传送到接收位置,用于维修或监测,通过将推进流体泵送到管中以迫使猪向前进入管道,所述推进器猪包括:主体,其具有前端和 所述后端包括反应表面,所述推压流体施加有动力,所述主体具有略小于所述管的内径的直径,周向地布置在所述猪身上以密封所述主体和所述主体之间的密封件 管道,用于将回流管线可释放地连接到猪的连接器,所述连接器包括移动的心轴,其通过泵送球通过回流管线而被启动以打开连接器,所述球体在打开之后保持在返回流动管线中 所述连接器,设置成当所述返回流动线路断开时,空白留下的孔; 使得所述推进器猪和任何连接的维修或监测设备可通过将流体泵送到管道和返回流动管线之间的环空中,同时根据需要返回流体通过所述返回流动管线来维持所述猪的压差以促使所述 猪通过管道前进,而在任何时候,返回流动线路可以从猪断开并且被取回到入口端,并且通过泵送或引导流体进入管道,冲孔的猪可以向前推动到猪接收位置。 用于水合物去除的推进器猪系统是本发明的实施例。