UNIT TO RECOVER IDLE OIL WELLS USING ECOLOGICALLY PURE AND SAFE STEAM GENERATOR Russian patent published in 2010 - IPC E21B43/25 E21B43/24 E21B36/00 

FIELD: oil-and-gas industry.

SUBSTANCE: proposed unit comprises steam generator, drill rods, nozzle and valve. In compliance with this invention, this plant is furnished with steam generators arranged on the surface and in oil layer. Steam generator arranged on the surface is placed in tight chamber of outer enclosure on 1 to 1000 mm-thick heat-insulation material, for example expanded clay. Steam generator chamber accommodates live filament wires connected to transformer secondaries and primaries. Each transformer is placed on cover and lateral plates. There are electric power supply line and pipelines connected, on one side, with water supply line, cleaning filter and pump rated at water pressure of 15 to 40 MPa. On the other side, pipelines are connected to pipeline feeding superheated steam with temperature of 550°C and pressure of 15 to 40 MPa into adapter channel, casing string channel and steam generator arranged in well oil layer. Said steam generator comprises adapter, outer tube with plugs accommodating expanded clay isolator, open filament wire and transformer with primary and secondary connected to said open filament wire, cable arranged in pipeline connected to said adapter at lower part and, at upper part, with casing string wrapped by a layer of heat isolation material, for example glassy and steel strip and with electric circuit. Casing string bottom is furnished with 1.0…25 mm-dia nozzles with valves while rod bottom is plugged. Steam generator cover and outer enclosure are furnished with pipeline connected with vacuum pump.

EFFECT: cleaning channels of paraffin and viscous substances.

1 dwg