Wells – Processes – Distinct – separate injection and producing wells
Patent
1997-10-15
2000-06-27
Tsay, Frank
Wells
Processes
Distinct, separate injection and producing wells
166303, 166 59, E21B 4324
Patent
active
060794992
ABSTRACT:
A method and apparatus is disclosed for heating of formations using fired heaters. The method includes the steps of:
providing a wellbore within the formation to be heated, the wellbore comprising
a casing within the formation to be heated,
a tubular defining, in the inside of the tubular, a flowpath for hot gases from the surface to a point in the wellbore near the bottom of the formation to be heated, and a volume between the tubular and the casing providing a flowpath for hot gases from near the bottom of the formation to be heated to the top of the formation to be heated, wherein the flowpaths are in communication with each other near the bottom of the formation to be heated and the volume between the casing and the tubular at the top of the formation to be heated is in communication with a point above the surface, and
insulation for a portion of the length of the wellbore within the formation to be heated between the flowpath for hot gases from the surface to the point in the wellbore near the bottom of the formation to be heated and the flowpath for hot gases from near the bottom of the formation to be heated to the surface; and
supplying a flow of hot gases to the flowpath for hot gases from the surface to a point in the wellbore near the bottom of the formation to be heated.
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patent: 5255742 (1993-10-01), Mikus
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Karanikas John Michael
Mikus Thomas
Vinegar Harold J.
Wellington Scott Lee
Christensen Del S.
Shell Oil Company
Tsay Frank
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