Downhole electric steam generator with heating elements

Abstract

This invention relates to a method for generating steam downhole. The proposed device is an electric steam generator with heating elements installed on the walls of internal communicating tortuous pipes in a cylindrical heating chamber with winding passage of water-steam mixture for achieving overheated steam condition. The heating elements are made of a high electrical resistance alloy to ensure the conversion of water injected from the surface to steam or high temperature superheated steam for injection into the reservoir under pressure.

1 . A downhole electric steam generator run in to the bottom of the injection well on a tubing pipes with Ni-Cr heating elements of high electric resistivity installed in a form of rods on the cylindrical walls of the inner tortuous pipes of the heating chamber with a winding passage of the water-vapor mixture for achieving overheated steam condition for injection into the reservoir under pressure. 
     
     
         2 . A downhole electric steam generator as claimed in  claim 1 , in which the heaters are made in the form of rods from an alloy of nichrome consisting of nickel and chromium with possible additions of silicon, cobalt, iron, aluminum and/or titanium.