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Well fluid sampling apparatus with isolation valve and check valve

  • US 6,182,753 B1
  • Filed: 12/16/1999
  • Issued: 02/06/2001
  • Est. Priority Date: 09/23/1997
  • Status: Expired due to Fees
First Claim
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1. A fluid sampling apparatus for use adjacent to a zone of interest in a well, the apparatus comprising:

  • a body having a plurality of chambers and a sampling port defined therein, the sampling port being in communication with one of the chambers and an outside zone of the body such that a fluid sample may be flowed into the one of the chambers;

    an isolation valve, disposed in the body, for allowing hydrostatic pressure from the well into the body substantially after flowing the fluid sample and thereby communicating the hydrostatic pressure to the chambers; and

    a check valve for preventing fluid flow outwardly from the body and thereby trapping the hydrostatic pressure in the body.

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