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IRZ TMS Downhole monitoring system for severe invironment conditions


Monitoring and performance optimization of the Electrical Submersible Pump (ESP) in the following conditions for submersible electrical motors: high pressure, high noise level, at a depth of up to 6 000 meters, at a temperature of the formation fluid up to 150 °С ( there is also an option for 180 °С with short-time top heat up to 200°С)

System components

  • downhole sensor (DHS)
  • TMS-E5-01 or ASPT surface unit
  • depending on the modification, motor base or adapter for connecting the downhole sensor to the submersible electrical motor

Monitored Parameters

  • pressure at the intake of the pumping unit
  • motor oil pressure
  • motor oil temperature
  • formation fluid temperature
  • motor stator winding temperature
  • motor vibration level
  • insulation resistance of the power cable and the motor

The usage of IRZ TMS-M3N allows ESP operation’ managing systems  to provide the following

  • protection and optimization of ESP operation
  • automatic holding of a given liquid level in a wel
  • data acquisition for well hydro-dynamic testing

Principle of Operation

The downhole sensor is mounted directly to the bottom of the submersible motor or by means of a motor base or adapter, supplied separately for a specific type of the submersible motor. The TMS-E5 surface panel is installed inside of the drive. The telemetric data from the downhole sensor is transmitted through the power cable of the submersible motor, processed in the surface unit and transmitted to the drive.


  • built-in display
  • USB-archive in TMS-E5
  • Collecting, displaying and transmitting actual parameters via the GSM channel to the consumer's server, ability to view actual parameters, recording and storing data of the drive operation, plotting graphs, generating a report in MS Excel and WellView format
  • battery to measure pressure recovery curve in case of power failure
  • connection of the thermocouple built in the motor (J or K type)
  • relay and analogue outlet for connection to old type control stations (drives)


  • excess voltage protection in case of power cable’ or motor’ short circuit failure up to 5000V
  • reliable parameters’ transmission  at a voltage of 1000V at zero point.
  • pressure sensors at the pump input are directly in communication with external environment
  • pressure measurement at the pump input with a resolution of 0,01 kgf/cm2
  • the units can be repaired with a maintenance kit. No further calibration is required.
  • steady reception at a lower insulating resistance of the “TMPN—cable—motor” system
  • compatible with any control station (drive) of national production
  • full range of modifications of downhole sensors for connection to motor with a diameter from 70 mm to 185 mm
  • there are TMS modifications according to the technical requirements of PJSC Lukoil, PJSC Surgutneftegas, PJSC Rosneft
Supply voltage 160—300 V
Telemetry information updating  interval 20 s (optionally, pressure at the input- once per 5 sec; other parameters — once per 30 sec)
Operating temperature range
— for surface unit -60…+60 °С
— for downhole sensor 0…+150 (optionally up to 180) °С
Temperature measuring range
— motor stator winding 0…+250 °С
— motor oil temperature 0…+250 °С
— formation fluid temperature 0…+150°С
Pressure measurement range, kgf/cm2 0—25/40/250/400/600 kgf/cm2
Pressure measurement resolution 0,01 kgf/cm2
Error of measurement  0,25/0,5 % depending on modification
Motor vibration acceleration’ measurement range 0—5 g
Interfaces for connection with drive controller RS-232, RS-485