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公开(公告)号：US10480298B2
公开(公告)日：2019-11-19
申请号：US15632310
申请日：2017-06-24
IPC分类号： E21B43/12 , E21B33/128 , E21B33/12 , F04B11/00 , F04B17/03 , F04B35/04 , F04B43/08 , F04B43/107 , F04D13/06 , F04D13/10 , F04B47/06 , F04B53/00 , F04B53/02 , F04B53/08 , F04B53/18 , H02K5/132
摘要： An electric submersible pumping system for use in pumping fluids from a wellbore includes a motor, a pump driven by the motor, and a fluid expansion module connected to the motor. The fluid expansion module includes a piston seal housing and a piston assembly contained within the piston seal housing. The piston assembly includes a piston body having an exterior surface, a plurality of seals connected to the exterior surface of the piston body and a pressure equalization system. The pressure equalization system reduces a pressure differential between fluid in an annular space between the plurality of seals and fluid surrounding the first piston assembly.
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公开(公告)号：US20170292342A1
公开(公告)日：2017-10-12
申请号：US15632310
申请日：2017-06-24
IPC分类号： E21B33/128 , F04B9/133 , E21B33/12
CPC分类号： E21B33/1285 , E21B33/1208 , E21B43/128 , F04B11/00 , F04B17/03 , F04B35/04 , F04B43/08 , F04B43/107 , F04B47/06 , F04B53/008 , F04B53/02 , F04B53/08 , F04B53/18 , F04D13/0653 , F04D13/10 , H02K5/132
摘要： An electric submersible pumping system for use in pumping fluids from a wellbore includes a motor, a pump driven by the motor, and a fluid expansion module connected to the motor. The fluid expansion module includes a piston seal housing and a piston assembly contained within the piston seal housing. The piston assembly includes a piston body having an exterior surface, a plurality of seals connected to the exterior surface of the piston body and a pressure equalization system. The pressure equalization system reduces a pressure differential between fluid in an annular space between the plurality of seals and fluid surrounding the first piston assembly.
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