04538682 is referenced by 175 patents and cites 13 patents.

A method of removing paraffin build up from an oil well which includes determining the location of a cooler portion of the oil well at which paraffin build up occurs, introducing an inductance heating element down into the annular space between the oil well tubing and the oil well casing, positioning the inductance heating element in the vicinity of the cooler portion and inductance heating the inside surface of the oil well tube to at least the temperature about that of the melting point of paraffin. Preferably, the inside surface of the tube is heated on the down stroke of the oil well sucker rod and at the start of the sucker rod up stroke in order to strip the paraffin from the tubing. The outside surface of the sucker rod is heated on its up stroke and the inductance heater has multiple bands of coil to heat the same general area of the sucker rod as it travels.

Title
Method and apparatus for removing oil well paraffin
Application Number
6/530366
Publication Number
4538682
Application Date
September 8, 1983
Publication Date
September 3, 1985
Inventor
James Backus
4123 Wills Rd., Cheyenne, 82001
WY, US
Elmer Winckler
3605 Arctic Blvd., #241, Anchorage, 99503
AK, US
James W McManus
515 San Salvador Dr., Dunedin, 33528
FL, US
Agent
Price Heneveld Huizenga & Cooper
IPC
E21B 37/00
E21B 36/04
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