Downhole Servo Motors – High-Temp Brushless MWD Solutions

Electromate supplies maxon Heavy Duty Brushless Servo Motors engineered for extreme environments encountered in oil and gas exploration, geophysics, and deep drilling.

These motors deliver reliable performance in Measurement While Drilling (MWD), Logging While Drilling (LWD), Rotary Steerable Systems (RSS), and downhole valve actuation applications.

Designed for hostile conditions, these motors are capable of sustained operation in ambient temperatures exceeding 200°C, pressures up to 1,700 bar (25,000 psi), and extreme mechanical stress—including vibrations up to 25 grms and shock loads as high as 1,000 G in select systems.

Constructed with a hermetically sealed stainless steel housing, the motors are protected from contaminants and are optionally ATEX certified for operation in explosive environments.

Redundant winding systems are available for mission-critical reliability. Vacuum-compatible models and encoder integration options also support advanced logging and control operations.


Key Features:

  • High-temperature capability: rated for >200°C continuous operation
  • High-pressure tolerance: up to 1,700 bar (25,000 psi)
  • Withstands vibration (25 grms) and shock (up to 1,000 G)
  • Hermetically sealed stainless steel housing
  • Up to 88% efficiency in air, >70% in oil
  • Designed for oil-filled or air-filled operation
  • Redundant winding systems available
  • ATEX compliant variants for explosive atmospheres
  • Encoder and vacuum-compatible options available
  • Compact Ø22 mm housing for space-limited designs

 

A view of the inside of the EC22 HD motor with the special coil, System maxon.

Cutaway example of directional drilling.

maxon motor also offers a matching gearbox for the EC22 HD: the GP22 HD.


Target Applications:

  • MWD and LWD servo motors for real-time drilling data
  • Rotary Steerable System (RSS) drive motors
  • High-reliability brushless motors for valve actuation
  • Brushless DC motors for wireline intervention tools
  • High-pressure/high-temperature servo motors for energy sector equipment

Downhole & MWD Product Solutions:

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EC Series BLDC Motors by Maxon Tariff Free

EC Series BLDC Motors

High efficiency, long lifespan, and compact design. Power outputs up to 400 W and speeds up to 25,000 rpm.

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EC-4pole BLDC Motors by Maxon Tariff Free

EC-4pole BLDC Motors

High power density with 4-pole technology for increased torque and speed. Compact, efficient design for demanding high-performance applications.

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Downhole Applications

Additional downhole applications serviced by downhole & MWD motors such as maxon's heavy duty brushless servo motors include:

  • Wireline Tools
  • Rotary Steerable Systems (RSS)
  • Downhole Power Generation
  • Pipe Cutters
  • Logging While Drilling (LWD)
  • Valve Control

 

Maxon Downhole Application Story

cross section of a directional drilling sitecross section of a directional drilling site

Directional Drilling

EC22 HD motorEC22 HD motor

Withstands temperatures of more than 200 degrees: the maxon EC22 HD motor. © 2012 maxon motor

Inside view of a EC22 HD motor with the special coilInside view of a EC22 HD motor with the special coil

A view of the inside of the EC22 HD motor with the special coil, System maxon. © 2012 maxon motor

Maxon motor with a matching gearboxMaxon motor with a matching gearbox

maxon motor also offers a matching gearbox for the EC22 HD: the GP22 HD. © 2012 maxon motor