VARIABLE-CONFIGURATION BOREHOLE ASSEMBLY Russian patent published in 2020 - IPC E21B19/16 E21B7/08 E21B17/04 

FIELD: drilling of wells.

SUBSTANCE: group of inventions relates to borehole connection assemblies, borehole connecting systems for branched or multi-barrel wells and to method of borehole connection unit installation. Well bore assembly comprises at least first and second tubular columns and a tubular string connector having first and second opposite ends, and each of first and second tubular columns, fixed at the first opposite end with oriented connections. Each of the first and second tubular columns has a fixed angular orientation relative to the connector. Well bore assembly is configured to position a second tubular string with a support mounted therein at a lateral distance from the deflector, wherein the deflector deflects the second tubular string sideways into the borehole section. Support at least partially covers the first tubular string before deviation of the second tubular string into the borehole section.

EFFECT: technical result consists in the possibility of changing the borehole connection assembly configuration for adaptation to the specific well conditions.

23 cl, 14 dwg