PLUG DEFLECTOR FOR BOREHOLE INSULATION IN MULTI-SHAFT WELL SYSTEM Russian patent published in 2020 - IPC E21B7/06 E21B23/00 E21B33/12 

FIELD: soil or rock drilling; mining.

SUBSTANCE: group of inventions relates to a system and method of isolating a multi-barrel well, as well as to a plug deflector. Multi-barrel well isolation system comprises Y-shaped unit located in multiple well bore at the intersection of the first well bore and the second well bore. Y-shaped unit has the first branch hydraulically connected to the first well shaft, and the second branch hydraulically connected to the second well shaft. System also comprises a plug deflector connected to the Y-shaped unit by means of a device capable of destruction when making a predetermined axial load, and comprising: a housing having a first end and a second end opposite to the first end; receiving socket for the tool provided on the first end and defining internal hole which defines the first connecting mechanism; at least one plug provided at the second end and extending into the first or second branches; and deflector surface provided in intermediate position between first and second ends.

EFFECT: technical result consists in provision of temporary isolation of the section of the multi-barrel well with reduction of the number of required downhole tools, time and costs for performance of operations in the well shaft.

15 cl, 7 dwg