WELL COMPLETION METHOD AFTER WORKOVER Russian patent published in 2023 - IPC E21B43/25 

FIELD: oil and gas.

SUBSTANCE: well completion method after a workover includes running a pipe string with a packer into the well, packing the packer, changing the fluid to a lighter fluid while maintaining pressure on the formation, and inducing inflow from the formation. Before lowering the pipe string, a circulation valve is installed in the pipe string to provide hydraulic communication between the tubular space and the annulus of the well, the fluid is replaced with a lightened liquid in the annulus of the well. After replacing the fluid with a lightened fluid, inflow is initiated by lowering the level of the lighter fluid in the tubular space of the well by simultaneously supplying the gas mixture to the tubing space and withdrawing the lightened fluid from the annulus in volumes from 5 to 10 m³ enabling independent completion of the well.

EFFECT: reduced downtime of the well by reducing the duration of well completion and reducing the impact of fluid on the productive formation.

1 cl, 1 dwg, 1 ex