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Progressive cavity pump for downhole inflatable packer

  • US 5,097,902 A
  • Filed: 10/23/1990
  • Issued: 03/24/1992
  • Est. Priority Date: 10/23/1990
  • Status: Expired due to Fees
First Claim
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1. A downhole inflatable packer pump comprising:

  • case means for attaching to a lower testing string portion and having an inlet and an outlet, said outlet being communicable with an inflatable packer at a location below said pump;

    mandrel means, rotatably disposed within said case means, for connecting to an upper testing string portion for mutual rotation therewith and rotating within said case means;

    an elastomeric pump stator disposed in said case means, said stator having a convoluted inner surface;

    a rotor extending form said mandrel means and into said stator, said rotor having a convoluted outer surface, said stator and rotor defining a plurality of cavities therebetween, whereby rotation of said rotor within said stator moves fluid progressively from cavity to cavity and thereby from said inlet to said outlet;

    passageway means for providing fluid communication between said lower testing string portion and said upper testing string portion, said passageway means being sealingly separated from said cavities.

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