INFLATABLE DEFLECTOR FOR RE-ENTRY INTO SIDE WELLBORE Russian patent published in 2021 - IPC E21B41/00 E21B17/00 E21B23/00 

FIELD: machine building.

SUBSTANCE: group of inventions relates to an inflatable deflecting tool, a method and a system for re-entry into a side wellbore. Inflated deflecting tool for re-entry into the side wellbore comprises a body with an internal flow passage, an inflated elastic cylinder arranged along the outer part of the body. Tool also has a flow limiter which at least partially limits the fluid flow passing through the inner flow channel and creates a pressure drop across the entire tool when the fluid pressure rises in the inlet of the inner flow channel. Pressure drop inflates inflated elastic bottle and surface of inflated elastic balloon extends in radial direction outward from housing in response to inflation. Extended surface pushes the tool away from the wall of the main borehole in the direction of the opposite wall of the main borehole and deflects the tool into the side borehole.

EFFECT: technical result consists in increasing the diameter of the flow channel of the column, reducing the time of entry into the side wellbore.

15 cl, 15 dwg