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Powered wellbore bailer

  • US 9,334,704 B2
  • Filed: 09/27/2012
  • Issued: 05/10/2016
  • Est. Priority Date: 09/27/2012
  • Status: Active Grant
First Claim
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1. A wellbore bailer, comprising:

  • a rotary motor coupling;

    a rotary downhole motor coupled to the rotary motor coupling, the rotary downhole motor comprising a downhole power unit configured to provide power to operate the rotary downhole motor in response to an actuation signal from an electrical conductor of a well wireline;

    a cylinder having an open end;

    a pump in the cylinder coupled to the rotary motor coupling and configured to pump fluid when rotated via the coupling, where the pump comprises a central shaft carrying a helical blade that extends outward from the shaft and defining a helical fluid chamber substantially the length of pump, and where the helical blade seals with an interior wall of the cylinder; and

    a closure changeable between sealing and allowing flow through the open end.

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