Downhole & MWD Motors

Petroleum and natural gas recovery relies on cutting-edge technology, including heavy-duty brushless servo motors by maxon, designed for extreme conditions like temperatures exceeding 200°C, high pressure, and intense shock and vibration.

These motors are crucial for various drilling applications, valve control, communication, and instrumentation.

As the world depends on fossil fuels for over 85% of its energy, accessing these resources requires drilling deeper than ever, sometimes over 2.5km deep.

Recent advancements in directional drilling enable access to formerly unreachable reserves, with depths of 5km and lengths of 11km now achievable.

Drilling equipment faces harsh environmental conditions globally, especially the drill head. Maxon's heavy-duty brushless DC motors are engineered to endure extreme vibration, pressure, and heat, ensuring reliability in challenging environments.  Paired with modern electronics, they enhance control and monitoring of drilling operations.


Mud Flow Power and More

Magnetic couplings convert back-driven motors into generators, utilizing mud flow for the drill turbine to power brushless DC motors. This energy powers localized electronics in the drill head, eliminating the need for batteries. Measurement While Drilling (MWD) technology enables real-time position detection and adjustment of the drill head, utilizing maxon heavy-duty motors for actuation and communication pulses.

MWD technique involves a measurement module behind the drill head, measuring variables like angle and vibration. Collected data is transmitted through mud pulses (MPT) to the surface, driven by maxon's heavy-duty brushless servo motors.

Maxon's heavy-duty motors, available with corresponding gearboxes, withstand extreme conditions, offering elevated torque for low duty cycles. Gearboxes feature through holes for oil circulation, facilitating heat dissipation. Motors are adhesive-free, capable of operating in temperatures exceeding 240°C and pressures up to 1,733 atmospheres, withstanding vibrations and impacts.


High Efficiency DC Motors at Great Depths

The maxon heavy duty motor range features efficiencies of up to 88% in air and over 70% submerged in oil. This makes it an ideal solution for any extreme environment such as aerospace and heavy industry. They have zero cogging making them easy to control and suitable for precise positioning.

The benefits of maxon’s Heavy Duty brushless Servo Motors & Gearmotors include:

  • Operating temperatures (-55°C… 240°C)
  • Withstands high shock loads and vibrations: 1000G / 25 Grms
  • Operates at high pressure (up to 1,733 bar)
  • Highly reliable, even in harsh environments
  • Motors can run in air or fully submerged in oil
  • Motors can operate with optional high-temperature hall effect sensors or in sensorless operation with electrical motor controllers

Downhole Product Solutions

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EC Series BLDC Motors by Maxon

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

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

 


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