DEVICE FOR ELECTRIC HEATING OF OIL WELL Russian patent published in 2001 - IPC

FIELD: oil producing industry; applicable in cleaning of flow strings from paraffin deposits. SUBSTANCE: device has power transformer and cable for power supply to terminals of well pipelines, thyristor frequency converter, current transducer and setter, current regulator, oil temperature sensor and temperature regulator. Inlet of the latter is connected with output of temperature sensor and output is connected with input of current setter whose output and output of current transducer are connected via current regulator to input of thyristor frequency converter. Current transducer is connected with power transformer and with the second input of thyristor frequency converter whose output is connected to terminals of well pipelines. Device is provided with unit of monitoring and control having programmed microprocessor electronic computer, control point having control electronic computer and communication channel between control electronic computer and programmed microprocessor electronic computer via power line. Communication channel includes unit of channel-forming apparatuses with power line connection unit, power line and unit of channel-forming apparatuses of control point with unit of connection with power line. The second output of thyristor frequency converter, outputs of current transducer and temperature sensor are connected to inputs of monitoring and control unit, and outputs of the later are connected to the third input of thyristor frequency converter and to second input of temperature regulator. EFFECT: provided automation of process with use of telecontrol. 2 dwg