FACILITY FOR REMOVAL OF PYROBITUMEN-RESINOUS-PARAFFIN SEDIMENTS IN FLOW STRINGS Russian patent published in 2009 - IPC E21B37/00 E21B36/04 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry and can be implemented in oil wells at removal of pyrobitumen-resinous-paraffin sediments. The facility consists of a current source, whereto an armoured current conducting cable is connected; the cable is lowered on flow strings (FS) into annular space; further the facility consists of a heating elevator, the case of which is secured on the FS and consists of two equal parts pivotally connected between them and closed by means of a lock. A through opening is made in the case of the facility oriented in the direction of FS lowering, the axis of which is parallel to axis of the opening. The armoured current conducting cable is inserted with its bare part into the opening of the case, into a top and bottom of which sealing insulators are introduced. The case of the heating elevator is made out of a thermo-resistant insulating material, while sealing insulators are made out of a thermo-resilient insulating material.

EFFECT: increased efficiency of utilisation of heat power and minimised power and operational costs.

3 cl, 7 dwg