OPERATING METHOD OF PRODUCTION WELL OF HIGH-VISCOSITY OIL Russian patent published in 2013 - IPC E21B43/00 

FIELD: oil and gas industry.

SUBSTANCE: according to the proposed method, a layout consisting of the following in upward direction is lowered to the well: a lower perforated connection pipe, a valve, a drain valve, a packer, a bottom-hole pump, a tubing string, an upper perforated connection pipe and a line of rods. The bottom-hole pump is brought into operation under action of movements of the line of rods. Supply of high-viscosity oil is performed to the well head via the tubing string and through upper perforated connection pipe via inter-tube space. Periodic straight flushing is performed by pumping of flushing liquid via the tubing string, sampling is performed through upper perforated connection pipe and inter-tube space and back flushing is performed by lifting the pump above upper perforated connection pipe. Pumping of flushing liquid is performed via inter-tube space and sampling is performed through upper perforated connection pipe and tubing string.

EFFECT: providing the possibility of bringing bottom-hole equipment to working position at sticking of the line of rods by straight or back flushing of the well without lifting that equipment from well.

1 ex, 1 dwg