METHOD OF REDUCING WELL REPAIR DURATION WITH INSTALLATION OF THE FLEXIBLE PIPE Russian patent published in 2018 - IPC E21B37/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the petroleum industry and can be used in the repair of wells with the use of a flexible tubing (FT) installation. When performing the method, a wash interval is determined, the upper boundary of which is set 10–20 m above the bottom of the well, and the lower boundary of the wash is the bottomhole; a flexible tubing string is lowered while simultaneously pumping the process fluid from the wellhead to the lower boundary of the wash interval. At the same time, continuous pumping of the process fluid during the entire descent of the FT is maintained. When the FT is reached, the upper limit of the wash interval reduces the rate of descent of the FT and increases the flow rate of the liquid. After the FT is lowered to the lower wash interval, if there is no circulation, the wellbore is filled to the mouth by pumping the process fluid through the large annular space.

EFFECT: filling of the wellbore with liquid is intensified, as a result, the efficiency is increased and the duration of the well repair is reduced.

6 cl, 2 dwg