EXOTHERMIC METHOD OF REMOVING ASPHALT-RESIN-PARAFFIN HYDRATE PLUGS IN WELLS Russian patent published in 2024 - IPC E21B37/00 E21B36/00 

FIELD: oil industry.

SUBSTANCE: in the exothermic method of removing ARPD in oil well tubing, ARPD destruction is carried out by burning out using at least one device with a charge which is completely destroyed during combustion. Said device is lowered at the wellhead into the tubing string to the level of the ARPD plug on the control cable, which provides control of the position, control of the lowering speed of the device with charge and its ignition, with the possibility of stopping on the cable in the place of the ARPD plug or performing repeated descents and ascents of the device along the ARPD plug until its complete destruction. Flameless combustion is carried out in the lower part of the device along the axis of the tubing string in the direction of the ARPD plug, wherein flameless combustion starts at the moment when the device touches ARPD. After the plug is destroyed, the device is lowered under the action of its own weight and the tubing section is cleaned from asphalt-resin-paraffin deposits. Combustion products are removed to day surface by gas lift.

EFFECT: destruction of asphalt-resin-paraffin deposits in wells and tubing strings directly in the well without their extraction to the surface.

3 cl, 1 dwg