The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 2009
Filed:
Nov. 24, 2004
Keith R. Minnich, Pewaukee, WI (US);
Mark C. Nicholson, Pewaukee, WI (US);
Ramkumar Karlapudi, Lake Mary, FL (US);
Richard M. Schoen, Hartland, WI (US);
Keith R. Minnich, Pewaukee, WI (US);
Mark C. Nicholson, Pewaukee, WI (US);
RamKumar Karlapudi, Lake Mary, FL (US);
Richard M. Schoen, Hartland, WI (US);
Aquatech International Corporation, Canonsburg, PA (US);
Abstract
An evaporation based method for generation of high pressure steam from produced water in the heavy oil production industry. De-oiled produced water is processed through a high pH/high pressure evaporator driven by a commercial watertube boiler. The vapor produced by the evaporator is suitable for the steam assisted gravity drainage (SAGD) method being utilized by heavy oil recovery installations, without the use of once through steam generators that require extensive chemical treatment, and without requiring atmospheric distillation, which requires high power consuming compressors. Evaporator blowdown may be further treated in a crystallizing evaporator to provide a zero liquid discharge (ZLD) system and, with most produced waters, at least 98% of the incoming produced water stream can be recovered in the form of high pressure steam.