MULTILATERAL WELL FORMATION Russian patent published in 2018 - IPC E21B43/17 E21B43/14 E21B7/06 

FIELD: construction; mining.

SUBSTANCE: group of inventions refers to the field of well construction – the formation of a number of their trunks with the conduct of fracturing in them. By the method, drilling is performed using a subterranean zone drilling rig to form the main wellbore. Placed using a drilling rig of a wedge-deflector in the main wellbore. Drilling is performed using a drilling rig and a wedge deflector of the subterranean zone to form a sidetrack extending from the main trunk. Drilling rig is removed after the formation of a multilateral well containing the main wellbore and the lateral borehole. This leaves a wedge-deflector in the main wellbore. Hydraulic fracturing operation is performed in the lateral wellbore using a fracturing system. This operation includes arranging access to the lateral wellbore using a pressure expandable element to dimensions that allow or prevent access to the main wellbore.

EFFECT: increase the efficiency of well construction by ensuring reliable communication with each of the trunks.

19 cl, 15 dwg