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Method and apparatus for MWD formation testing

  • US 7,080,552 B2
  • Filed: 05/19/2003
  • Issued: 07/25/2006
  • Est. Priority Date: 05/17/2002
  • Status: Active Grant
First Claim
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1. A formation testing tool comprising:

  • a longitudinal body having a flowbore and coupled to a MWD tool;

    a plurality of extendable centralizing pistons coupled to the body;

    an extendable sample device coupled to the body; and

    a centralizing hydraulic circuit to cause each of the plurality of centralizing pistons to extend at substantially the same rate.

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