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Downhole carbon dioxide gas analyzer

  • US 6,218,662 B1
  • Filed: 04/23/1998
  • Issued: 04/17/2001
  • Est. Priority Date: 04/23/1998
  • Status: Expired due to Term
First Claim
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1. A bore hole apparatus for analyzing the carbon dioxide concentration in a fluid sample down hole in a bore hole, comprising:

  • a decompression chamber having a piston for defining an initial volume in the decompression chamber for containing the fluid sample wherein the piston is slidably disposed within the decompression chamber for controllably expanding the decompression chamber initial volume of the decompression chamber and decreasing the pressure within the decompression chamber to decompress the fluid sample;

    a transmitter for discharging mid-infrared light;

    a first sensor for measuring the absorption of mid-infrared light by the decompressed fluid sample and for generating a signal representing the carbon dioxide concentration in the fluid sample; and

    a processor for receiving said signal and for determining the fluid sample carbon dioxide concentration.

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