POWER TRANSMISSION APPARATUS, METHOD FOR REMOTE CONTROL SIGNAL GENERATION INSIDE TUBULAR STRUCTURE AND OIL WELL Russian patent published in 2005 - IPC

FIELD: oil production industry, particularly for power transmission and communication establishing through pipe string.

SUBSTANCE: apparatus comprises outer device adapted to transmit power and arranged around the first tubular structure. Outer device receives the first alternating current from the first tubular structure. Apparatus has inner device adapted to transmit power and arranged inside the first tubular structure near the outer device. The inner device generates the second current induced during the first current transmission to outer device. Outer device may include toroidal core transformer coil electrically linked with primary coil of solenoid transformer. Inner device may have secondary coil of solenoid transformer. Method for remote control signal generation involves arranging outer device around the first tubular structure; installing inner device inside the first tubular structure; transmitting main alternating current signal to the first tubular structure; initiating the first alternating current signal inside outer device and inducing remote control alternating current signal into inner device. Oil well comprises casing pipe with flow string arranged into the casing pipe. Outer devise is arranged outside casing pipe, inner device is installed around flow string near the outer one and is coaxial with it. Inner device is magnetically linked with outer device when alternating current is applied to outer device.

EFFECT: increased efficiency of electric power transmission from outer flow string pipe side to inner side thereof.

34 cl, 8 dwg, 1 ex