Wells – Processes – Heating – cooling or insulating
Patent
1974-12-20
1976-09-28
Novosad, Stephen J.
Wells
Processes
Heating, cooling or insulating
166 53, 166 59, 166 64, 166 65R, 166 72, E21B 4324
Patent
active
039825914
ABSTRACT:
The specification discloses a recovery process and system wherein hydrogen and oxygen are introduced into a vented pressure vessel, known as a gas generator, located at the bottom of a borehole, and ignited and burned to produce steam. The hydrogen and oxygen may be introduced either as a stoichiometric mixture or the combustible mixture may be hydrogen-rich. The gas generator comprises a cooling annulus surrounding a combustion and mixing zone for cooling the gas generator and the combustion products. Hydrogen or water may be supplied to the cooling annulus for cooling purposes. Remotely controlled valves are located downhole near the gas generator for positive control to the gas generator of the hydrogen and oxygen and of the water, if it is employed for cooling purposes. The well casing is sealed just above the gas generator by an inflatable packer. Provision is made for maintaining the desired hydrogen-oxygen ratio either by a hydrogen flow control slaved to a downhole thermocouple or by a special hydrogen-oxygen flow control employed in the event that ignition is carried out by a DC power supply located downhole. Although the preferred embodiment employs a fuel-oxidizer cooling fluid combination of hydrogen and oxygen or hydrogen, oxygen, and water, provision is made for employing other fuel-oxidizer-cooling fluid combinations.
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Hamrick Joseph T.
Rose Leslie C.
Novosad Stephen J.
Suckfield George A.
World Energy Systems
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