Seal section for electrical submersible pump

申请公布号：US7530391(B2)

申请号：US20070747363

申请日期：2007.05.11

申请公布日期：2009.05.12

申请人：

BAKER HUGHES INCORPORATED

发明人：HALL CLARENCE F.;PARMETER LARRY J.;LEAMY BRETT D.

分类号：E21B43/00

主分类号：E21B43/00

摘要：A seal section for a submersible well pump assembly has a housing for connection between a pump and a motor. A central radial bearing support rotatably supports a drive shaft and defines upper and lower chambers in the housing. A well fluid passageway leads from an exterior portion of the housing to the upper chamber. Upper and lower isolation tubes extend around the shaft within the upper and lower chambers, defining an annular passage for fluid communication with lubricant contained in the motor. A bladder surrounds the upper isolation tube for separating lubricant from well fluid in the upper chamber. A labyrinth tube within the bladder has an upper end in fluid communication with a labyrinth port leading through the upper isolation tube and a lower end in fluid communication with the lower chamber.

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