Patent ID: 9399907
Filing Date: 2016-07-26
CPC Classification: E21B

Claim Text:
1. A method for treating a subsurface hydrocarbon formation, comprising: applying electrical current to one or more heating elements positioned in a first tubular located in an opening in the subsurface hydrocarbon formation, wherein the first tubular is positioned inside a second tubular positioned in the opening in the subsurface hydrocarbon formation; providing fluid through the second tubular such that a portion of the fluid flows between the first tubular and second tubular in a first direction along a length of the tubulars; allowing at least some of the fluid to flow through an annulus between the second tubular and walls of the opening in a second direction, the second direction being opposite to the first direction; allowing at least some of the fluid to flow into a hydrocarbon layer in the subsurface hydrocarbon formation from the annulus between the second tubular and the walls of the opening and from an end of the second tubular distal from a surface of the formation; and allowing heat to transfer from the fluid and at least one of the heating elements to a portion of the hydrocarbon layer in the subsurface hydrocarbon formation.