Non-cryogenic production of nitrogen for on-site injection in downhole drilling

  • US 5,388,650 A
  • Filed: 06/14/1993
  • Issued: 02/14/1995
  • Est. Priority Date: 06/14/1993
  • Status: Expired due to Term
First Claim
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1. A method for drilling for oil or gas or a geothermal well in which a compressed inert gas is delivered to a drilling region within a downhole, the improvement comprising:

  • (a) removing at least a substantial portion of the oxygen contained within a feed stream of air at the site of said drilling to produce an inert rich gas and an oxygen enriched waste gas; and

    (b) delivering the inert rich gas to the drilling region within the downhole.

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