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Inflatable packer drill stem testing system

  • US 4,320,800 A
  • Filed: 12/14/1979
  • Issued: 03/23/1982
  • Est. Priority Date: 12/14/1979
  • Status: Expired due to Term
First Claim
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1. In a drill stem testing apparatus having upper and lower inflatable packing elements adapted to be suspended in a well bore on a pipe string, the improvement comprising:

  • first pump means operable in response to rotation of the pipe string for inflating said lower packing element into sealing engagement with the well bore wall to seal off the lower end of a well bore interval; and

    second pump means operable in response to upward and downward movement of the pipe string for inflating said upper packing element into sealing engagement with the well bore wall to seal off the upper end of said well bore interval.

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