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IRZ ТМS-М3N downhole monitoring system with cold backup of all electronic units


Control and optimization of electrical submersible pump (ESP) operated in well, which is subject to higher standards regarding reliability and confidence level of the recorded data. All electronic components of the downhole sensor are fully redundant. The backup electronics kit is activated upon command from the surface readout unit when the main kit fails.

System components

  • downhole sensor of BP-103M3N series
  • surface readout unit ТМS-E5 or АSPТ
  • depending on the modification, bearing support — adapter for connecting the downhole sensor to the submersible electrical motor (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 power cable and motor

The use of IRZ TMS-M3N allows the systems that control the ESP operation to provide the following:

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

Principle of operation

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


  • 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


  • the downhole sensor includes two independent sets of electronics — "master" and "slave". If the "master" set of electronics fails, the "slave" is activated automatically. There is a capability of manual engagement of the "slave" set
  • control of measurement accuracy due to ability to compare readings of two independently operated systems and to identify errors associated with partial failure of components
  • pressure measurement at the pump intake with accuracy of 0.01 kgf/cm2
  • data are transmitted to an external device via the RS-232 or RS-485 interface using the IRZ TMS2 exchange protocol
  • stable reception when the insulation resistance of the "Transformer — cable — motor" system drops to 10 kOhm
  • updating of real-time parameters — at least once per 40 s
  • there are specialized modifications according to the technical requirements of PJSC Lukoil, PJSC Surgutneftegas, PJSC Rosneft
Supply voltage 160—300 V
Max real-time parameters update time 30 s
Operating temperature range of the surface readout unit -60…+60 °С
Temperature measurement range:
— motor stator winding 0…+250 °С
— motor oil 0…+250 °С
— formation fluid 0…+150 °С
Pressure measurement range 0—25/40/250/400/600  kgf/cmdepending on modification
Pressure measurement resolution 0.01 kgf/cm2
Measurement error 0.25/0.5  % depending on modification
Motor vibration acceleration measurement range 0—5 g
Interfaces for communication with PLC RS-232, RS-485
Overall dimensions:
— ТМS-E5 210x250x160 mm
— BP-103M3N Ø103x755 mm