REMOVED DIVERTER Russian patent published in 2015 - IPC E21B7/08 

FIELD: oil and gas industry.

SUBSTANCE: removed diverter contains wedge-diverter with inclined work surface, made in form of the chute, the support assembly with bottom blind shoe and work chamber connected with the wedge-diverter via the adapter, the HP flexible tube for liquid supply via the adapter channel to the support assembly. The wedge-diverter is connected with the support assembly with possibility of disconnection upon destruction of the shear pins, and the support assembly with possibility of expansion upon liquid supply to the work chamber to fix relatively to the well walls, and folding upon liquid pumping out the work chamber with disconnection from the well walls prior to the extraction. The wedge-diverter by the shear pins is connected with the adapter sub, that has axial spring-loaded valve conducting from the support assembly, and located above non-tight punch pin and thread for hollow puller run on the pipes string blinded at bottom by the membrane and made with possibility of tight connection with the sub and membrane destruction by the punch pin.

EFFECT: reduced probability of diverter jamming and failure of its extraction from the well, simplified design.

2 dwg