Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1983-09-19
1985-12-10
Bartis, A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
137341, 138 33, 219201, 219279, 219526, 219528, 219535, 219536, H05B 102, H05B 334, E03B 710, F16K 4900
Patent
active
045582068
ABSTRACT:
An electric heating apparatus for providing freeze protection for a fluid-control device, such as a gas regulator, at a well site includes a flexible electric heating pad adapted to be wrapped around the control device to be freeze-protected and a two part thermally insulated housing adapted to be placed about the heating pad and control device when the apparatus is installed. The heating pad is adapted to be energized from a rechargeable battery under the control of a thermostat within the housing which disconnects heating pad from the battery when the temperature in the housing rises above a temperature of about 40.degree. F. A solar panel provides direct current for recharging the battery. A second thermostat disconnects the solar panel from the battery when the ambient temperature rises above about 50.degree. F. to terminate charging of the battery.
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"Solar Energy Used for Production"; by Dave Horan; Oil and Gas Journal; Mar. 6, 1978, pp. 80-82, 88, 90.
Bartis A.
Gilbert III E. Harrison
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