METHOD FOR UNDERGROUND WELL REPAIR TO REPLACE SUBMERSIBLE EQUIPMENT AND EXCLUDE INFLUENCE OF WELL-KILLING FLUID ON PRODUCTIVE PLAST Russian patent published in 2017 - IPC E21B34/14 F16K15/02 

FIELD: oil and gas industry.

SUBSTANCE: when an electric submersible pump is extracted from a wel, activation of the shut-off valve's locking group is performed when wellhead is sealed by an electric drive, fixed directly in the bottom of the electric submersible pump, a pusher actuated by a wellhead command via the submersible pump power cable, which is simultaneously a power source, in which the opening or closing of the shut-off valve is performed without moving the electric submersible pump. Underground repair without impact on the plast is performed by closing the valve unit of the push action by moving the rod upwards, moving the rod downwards while creating a certain force on the valve allows to open a connection with a sub-packer space, a productive plust. The pushing mechanism is a continuation of the telemetric system of the electric submersible equipment and depends on the state of insulation of the power cable and the submersible electric motor.

EFFECT: in cases of insulation failure in the pushing mechanism, accumulator batteries are provided, allowing to transfer the rod to the transport position where the valve unit is closed.

2 cl, 5 dwg