DEVICE FOR PREVENTION OF FORMING AND FOR ELIMINATION OF ASPHALT-RESIN-PARAFFIN SEDIMENTATIONS IN WELL PIPES Russian patent published in 2004 - IPC

FIELD: oil extracting industry. SUBSTANCE: device has tubing string and heating element in form of cable with conducting threads and conducting elements of the end. Tubing string is connected to negative output of power supply, and the cable is connected to positive output. Cable is rigidly fixed on the outer side of tubing string. On the end of conducting element a switch is placed with capability of closing either onto tubing string or cable armor. On the surface of tubing string a temperature is maintained for melting asphalt-resin-paraffin sedimentations both on inner and outer surfaces of tubing string and technological equipment in wells. EFFECT: facilitated well maintenance during well operation. 1 dwg