METHOD FOR SELECTIVE ACCESS TO BARRELS OF MULTI-BARREL WELL AND EQUIPMENT FOR IMPLEMENTATION OF METHOD Russian patent published in 2021 - IPC E21B7/08 E21B23/03 

FIELD: mining.

SUBSTANCE: invention relates to devices and methods of completion of wells with side or additional shafts. Proposed method consists in installation of support devices in main shaft casing for oriented installation and fixation of wedge-like wedge having outer and inner parts in the form of extracted pipe. Additional boreholes are drilled by method of sidetracking, additional boreholes are fastened without their hydraulic or mechanical connection with main bore. Restoration of passage into the main shaft, selective access to the main and additional shafts is ensured by using guide heads with diameter larger than the diameter of the through hole of the installation equipment. Calculation of parameters of the installation equipment is performed at the stage of well design, taking into account the well design and the used oil-field tool, for this purpose, diameters of guide heads are calculated to enter additional and main shafts and diameters of mating throughput holes of installation equipment mating by them, by means of extraction of inner part of wedge-deflector and restoration of passage to the main shaft. Equipment for implementing the method comprises a hydraulic armature with a blind shoe in the lower part, in the upper part, the armature is connected by threaded connection to a wedge-shaped wedge including an internal extracted pipe fixed in the body by means of shear elements, in lower part of wedge deflector by means of threaded connection guide branch pipe is installed in form of short pipe with protruding element in form of guide key for oriented landing and fixation of wedge-deflector in orienting funnel, having a key and a shear member connected to the orienting funnel, by means of a threaded connection is rigidly fixed to the anchor, connection of the orienting funnel and the guide nozzle is made by means of conjugation of shaped slot of the orienting funnel and key of the branch. Equipment includes at least one guide head representing an adapter with a spherical surface, which has a central flushing hole and a threaded connection with an oil-field tool.

EFFECT: technical result is higher efficiency of borehole works.

4 cl, 1 tbl, 2 dwg