PROCEDURE FOR EXTRACTION OF HIGH VISCOUS OIL FROM DEVIATING HOLE BY METHOD OF STEAM CYCLIC PUMPING INTO RESERVOIR Russian patent published in 2011 - IPC E21B43/24 

FIELD: gas and oil production.

SUBSTANCE: procedure for extraction of high viscous oil from deviating hole by method of steam cyclic pumping into reservoir consists in drilling ascending section in producing borehole, and in arrangement of tubing string with centrators for cyclic pumping heat carrier through them and of flow string with pump for withdrawal of oil in this section. The lowered tubing string is heat insulated. An ascending section of the hole is equipped with a filter with two opened zones at the beginning and end of this section, while tube space between the filter and the tubing string and between opened zones is insulated with a packer. Also, the pump is set in the flow string of the hole above the filter within the ranges of a sub-face of the reservoir, but below the bottomhole of the ascending section. The bottomhole in its turn is arranged below a top of the reservoir along vertical at distance not less, than 2 m. Upon heat carrier has been pumped, it is conditioned for distribution of heat in the reservoir. Oil is withdrawn with the pump till allowed reduction in yield, where upon the cycle of steam pumping is repeated.

EFFECT: increased yield of hole with simultaneous reduced material and power expenditures.

1 ex, 1 dwg