Patent ID: 7770646

Claim:
A downhole burner for a well, comprising: a burner casing; a liner coupled to the burner casing for combusting a fuel and an oxidizer; an injector coupled to the burner casing for injecting the fuel and the oxidizer into the liner; a steam channel located inside the burner casing and surrounding exterior surfaces of the injector and the liner; and the liner having a plurality of holes for communicating steam from the steam channel to an interior of the liner downstream from the injector, wherein the liner comprises an effusion cooling section located adjacent to the injector and an effusion cooling and jet mixing section located adjacent to the effusion cooling section, wherein the effusion cooling section has a first plurality of effusion holes disposed through a wall of the liner at an angle relative to the longitudinal axis of the wall and operable to inject small jets of steam through the wall to provide a layer of cooler gases to protect the wall of the liner, wherein the effusion cooling and jet mixing section has a second plurality of effusion holes disposed through the wall of the liner at an angle relative to the longitudinal axis of the wall and operable to inject small jets of steam through the wall to provide a layer of cooler gases to protect the wall of the liner and a plurality of mixing holes disposed through the wall of the liner at an angle perpendicular to the longitudinal axis of the wall and operable to inject steam farther toward the longitudinal axis of the liner, wherein the mixing holes are larger than the effusion holes.