ACIDIZATION OF THE MULTI-LATERAL WELL Russian patent published in 2018 - IPC E21B43/25 E21B34/06 

FIELD: drilling of soil or rocks; mining.

SUBSTANCE: systems and the method for locating the isolation device within the multi-barrel well are provided in order to isolate the wellbore from other wellbores in the well system. Insulation device is adapted to be moved from the open position to the closed position substantially simultaneously with the transformation of the wellbore into the working wellbore. Another procedure can be performed on another well of the multi-lateral well while the insulation device is in the closed position. Tubing, or short, or intermediate completion column, is configured in order to isolate the well bore from the pressure, which is applied to another well bore within the multi-lateral well system. Tubing, or short, or intermediate completion column, can also insulate the connection region of the multi-lateral well system, where the wellbore string comprises the short or intermediate completion column, which comprises the seal assembly at the first end and the anchoring device at the second end.

EFFECT: technical result is to increase the efficiency of the multi-lateral well acidization.

14 cl, 9 dwg