WEDGE-DEFLECTOR ASSEMBLY AND THE DEFLECTING WEDGE FOR MULTILATERAL WELLS Russian patent published in 2018 - IPC E21B7/08 E21B23/01 

FIELD: mining.

SUBSTANCE: group of inventions refers to the field of wells completion. Method of wellbores completing, including the wedge-deflector and an anchor retainer moving inside the parent wellbore, at that, the anchor retainer is attached to the wedge-deflector by a detachable connection, and the parent wellbore is at least partially lined with a casing string that contains a snap connection; securing the anchor retainer inside the parent wellbore by the anchor retainer snap profile docking to the snap connection; drill bit deflection by a wedge-deflector to drill a sidetrack coming away from the parent wellbore; moving the lateral completion equipment inside the sidetrack with a casing tool, at that, the side completion equipment comprises a completion tool; wedge-deflector separation from the anchor retainer by the detachable connection using the wedge-deflector extraction tool and thereby opening the detachable connection section, wherein the wedge deflector extraction tool is functionally connected to the casing lowering tool distal end; wedge-deflector removal from the parent wellbore by means of the wedge-deflector extraction tool; and the completion deflecting wedge moving inside the parent wellbore, wherein this completion deflecting wedge is functionally secured to the working string, and the completion deflection wedge attaching to the anchor retainer by means of a detachable connection.

EFFECT: enabling multi-barrel wells of drilling and completion efficiency, increase in each side or secondary wellbore productivity, decrease in the need for downhole lowering and lifting operations for the installation and use of equipment.

19 cl, 13 dwg