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Direct steam generator degassing

  • US 10,087,730 B2
  • Filed: 02/19/2015
  • Issued: 10/02/2018
  • Est. Priority Date: 02/18/2014
  • Status: Active Grant
First Claim
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1. A method of recovering hydrocarbons with steam, comprising:

  • vaporizing water by direct contact of the water with combustion products to produce a resulting fluid including the steam and carbon dioxide;

    cooling the fluid to provide a mixture of the carbon dioxide and water condensate;

    separating a gas phase with the carbon dioxide from a liquid phase with the condensate;

    regenerating the steam by reducing pressure and then heating the condensate in a heat exchanger for thermal transfer with the fluid;

    recycling to vaporize a liquid component that is separated from the steam following the reducing of the pressure and the heating in the heat exchanger; and

    injecting into a formation the steam with the carbon dioxide removed for recovery of the hydrocarbons.

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