Production in frigid environments

Details Production in frigid environments Production in frigid environments

1998-03-20

2000-01-04

Neuder, William

Wells

With heating, refrigerating or heat insulating means

Electrical heater in well

166302, 166901, 392305, E21B 3604

Patent

active

060099402

ABSTRACT:
A method and apparatus for producing (e.g. heavy oil) through a wellbore which passes through a permafrost layer. To maintain an acceptable flow temperature inside the production tubing, a heating element (e.g. electrical power cable having its leads short-circuited) is lowered down the production tubing to generate heat inside the tubing when electricity is supplied thereto. A sensor is provided to sense the temperature inside the tubing and activate a source to supply electricity to the cable whenever the temperature inside the production tubing drops below the desired temperature.

REFERENCES:
patent: 3485300 (1969-12-01), Engle
patent: 4616705 (1986-10-01), Stegemeier et al.

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