METHOD OF PRODUCING HIGH-VISCOSITY OIL AND DEVICE TO THIS END Russian patent published in 2011 - IPC E21B43/24 

FIELD: mining.

SUBSTANCE: invention relates to oil production, namely, to operation of viscosity oil deposits. Proposed method comprises lowering and fastening operating string in the well, perforated in the zone of oil-bearing stratum, lowering tubing string and well pump therein, performing metered feed of low-viscosity substance in tubular annulus to reduce oil viscosity, diluting high-viscosity oil flowing into the well through operating tubing perforation by low-viscosity substance, lifting diluted oil by well pump to well head into oil collection and preparation system. Twin string of concentric locked tubing strings are used to feed low-viscosity substance via tubular annulus into displacement assembly secured on large-diameter tubing string to dilute high-viscosity oil flow coming into said displacement assembly from the well. Invention covers also the device developed to implement above described method.

EFFECT: increased yield due to intensified well pump operation and reduction in unproductive losses.

3 cl, 2 dwg