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Downhole formation tester apparatus and methods

  • US 9,091,150 B2
  • Filed: 05/23/2013
  • Issued: 07/28/2015
  • Est. Priority Date: 11/16/2009
  • Status: Active Grant
First Claim
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1. A system, comprising:

  • a displacement unit configured to pump fluid;

    a first flowline hydraulically connected to the displacement unit through a valve network for selectively communicating the fluid to or from the displacement unit;

    a second flowline hydraulically connected to the displacement unit through the valve network for selectively communicating the fluid to or from the displacement unit;

    a first chamber pressure gauge hydraulically coupled with a first chamber of the displacement unit;

    a second chamber pressure gauge hydraulically coupled with a second chamber of the displacement unit;

    ,a power supply providing a force configured to operate the displacement unit;

    a force sensor configured to measure the force;

    a sample probe hydraulically coupled to the first flowline;

    a first flowline pressure gauge hydraulically coupled to the first flowline between the sample probe and the valve network; and

    a fluid sample chamber hydraulically coupled to the second flowline.

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