METHOD AND DEVICE FOR CLEANING OIL PIPE LINE Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: method consists in pumping the circular layer of heated cleansing agent subjected to additional rotation and action of negative gradient of density along ring radius. Rotary motion of cleansing agent is created either by electromagnetic inductors embracing the non-magnetic spacers in oil pipe line at additional introduction of ferromagnetic dispersed admixtures into flow or by means of hydromechanical swirler (screw feeder). Negative gradient of density is created by means of cooling the inner surface of revolving ring of cleansing agent. Optimal relationship between density gradient, rotational speed and thickness of circular layer is set. EFFECT: enhanced efficiency and reduced duration of cleaning the pipe line from bound deposits without disassembly of them. 4 cl, 5 dwg, 1 tbl