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Apparatus for extracting subterranean gas samples

  • US 4,310,057 A
  • Filed: 05/30/1980
  • Issued: 01/12/1982
  • Est. Priority Date: 05/30/1980
  • Status: Expired due to Term
First Claim
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1. Apparatus for extracting subterranean gas samples comprising:

  • an elongated stiff rod pointed on the lower end and having a gas passageway from adjacent the lower end to adjacent the upper end thereof, the rod being formed of an outer tubular shaft and a telescopingly received inner shaft longitudinally positionable relative to said outer shaft, said gas passageway being opened and closed by relative movement of said inner and outer shafts,means for driving said rod into the earth whereby the lower end thereof is below the earth'"'"'s surface;

    a collar means rotatably received on said outer tubular shaft having means rotatably engaging said inner shaft providing means to telescopically move said inner shaft relative to said outer shaft to open and close said gas passageway whereby said passageway may be closed until said rod lower end is driven beneath the earth'"'"'s surface, after which said passageway may be opened; and

    means adjacent the upper end of said rod for extracting a gas sample from said gas passageway.

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