Patent
Heater well method and apparatus
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TLDR
In this article, a method and apparatus for heating of formations using fired heaters is described, where two concentric tubulars are placed in the formation, connected via a wellhead to a burner at the surface.Abstract:
A method and apparatus is disclosed for heating of formations using fired heaters. Each fired heater may consist of two concentric tubulars emplaced in the formation, connected via a wellhead to a burner at the surface. Combustion gases from the burner go down to the bottom of the inner tubular and return to the surface in the annular space between the two tubulars. The two tubulars may be insulated in an overburden zone where heating is not desired. A plurality of fired heaters can be connected together such that the combustion gases from a first fired heater well are piped through insulated interconnect piping to become the air inlet for a second fired heater well, which also has a burner at its wellhead. This can be repeated for other heater wells, until the oxygen content of the combustion gas is reduced near zero. The combustion gas from the last fired heater well may be routed through a heat exchanger in which the fresh inlet air for the first heater well is preheated. A substantially uniform temperature is maintained in each heater well by using a high mass flow into the heater well.read more
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TL;DR: In this paper, an in situ process for treating an oil containing formation is provided, which includes providing heat from one or more heaters to at least a portion of the formation.
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References
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Patent
Heat injection process
TL;DR: In this paper, a method for heat injection into a subterranean formation is provided, where flameless combustion is used to eliminate the flame as a radiant heat source and results in a more even temperature distribution throughout the length of the burner.
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Heat injection process and apparatus
Harold J. Vinegar,Thomas Mikus,Carlos Alberto Glandt,John Michael Karanikas,Eric Pierre de Rouffignac +4 more
TL;DR: In this paper, a method for heat injection into a subterranean formation is provided, which utilizes flameless combustion and a gas fired heater having an electrical heated surface for ignition of the gas.