HEATING METHOD OF WELL BOTTOM HOLE AREA AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2015 - IPC E21B36/04 E21B43/24 E21B43/27 E21B47/07 

FIELD: oil and gas industry.

SUBSTANCE: heating method of well bottom hole area is characterized in that in the bottom hole area of the well in the perforation interval in the shank of the tubing leak below the downhole submersible equipment depending on the desired length and the heating capacity, one or several interconnected downhole electrical resistance heaters are lowered. The controlled warming of near-wellbore of the bottom hole area and the reservoir fluid entering into the well is carried out. The device for implementing the method is composed of interconnected downhole heater in the form of heating elements controlled from the surface and the air compression chamber or unit of seal section, with the ability of compensation of the compression impact of the heated coolant. The device also comprises an internal temperature sensor and a regulator of power supplied to the downhole heater formed as a thyristor rectifier unit, controlled by the connection with it by the programmable controller of the heating control station with the main indicator in the form of temperature characteristics of the device operation.

EFFECT: increase in efficiency of thermal influence on the near-wellbore in the vicinity of installation of the downhole heater, increasing the flow of fluid from the reservoir, and reducing the viscosity of the borehole fluid in front of the receiving filter of the borehole pump.

4 cl, 5 dwg