DEVICE FOR OIL HEATING DURING DRAINAGE Russian patent published in 2012 - IPC F17D1/00 

FIELD: oil and gas industry.

SUBSTANCE: device includes reservoir; microwave energy source with waveguide in the area of drain instrument; radiotransparent plate fixed in open end of waveguide; radar absorbent material in the form of a strip, which is fixed on spiral metal band on external lower side; metal screen located above radar absorbent material; shell; gap; reduction gear; bars for attachment of shell and spiral metal band to driven wheel of reduction gear; shaft connected to drive wheel of reduction gear and with electric drive through gland in reservoir wall. Surface of strip of radar absorbent material and external edge of spiral metal band are located in side plane of conditional flattened cone. Plane of spiral metal band is perpendicular to rotation axis of conditional cone. Lower edge of strip of radar absorbent material and upper edge of spiral metal band is separated with a gap. Lower smaller base of conditional cone is located near drain instrument.

EFFECT: reduction of costs.