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Steam generator and method for generating steam

  • US 9,249,972 B2
  • Filed: 01/04/2013
  • Issued: 02/02/2016
  • Est. Priority Date: 01/04/2013
  • Status: Active Grant
First Claim
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1. A method for producing steam, the method comprising:

  • combusting a fuel and an oxidant to generate heat in a combustion stream;

    injecting impure water into the combustion stream such that the heat produces a steam stream including particulate matter precipitated from the impure water, wherein the combusting is conducted in a combustion chamber, and further including cooling the combusting chamber using a film of the impure water;

    establishing a velocity of the combustion stream that is greater than a saltation velocity of the particulate matter in the combustion stream;

    separating the particulate matter using a separator selected from the group consisting of a cyclone separator, a filter and combinations thereof; and

    injecting the steam stream into a subterranean hydrocarbon reservoir, without conveying the steam stream through a heat exchanger.

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