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Formation sampling

  • US 9,322,266 B2
  • Filed: 12/22/2010
  • Issued: 04/26/2016
  • Est. Priority Date: 11/20/2007
  • Status: Active Grant
First Claim
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1. A downhole tool, comprising:

  • a primary flowline extending within the downhole tool to direct fluid from a subterranean formation through the downhole tool;

    a secondary flowline in fluid communication with the primary flowline to divert the fluid from the primary flowline to a sample chamber disposed in a sample chamber module of the downhole tool;

    a dump flowline disposed in a pump module of the downhole tool and in fluid communication with the primary flowline to divert the fluid from the primary flowline to the wellbore upstream of the secondary flowline; and

    a relief valve disposed in the pump module and in the dump flowline to control a pressure of the sample chamber.

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