Permanent magnet motor for REDA ESP pumps.

ESP permanent magnet motors

For oil and gas, mine dewatering, and geothermal Reda ESP pumps

Download PDF Contact Us Related Resources

Overview

A superior alternative to induction motors

The permanent magnet motor (PMM) is a three-phase, oil-filled motor with permanent magnets mounted in the rotor. Its unique design enables superior performance, improved efficiency, and higher power factor, resulting in reduced power consumption when compared with standard induction motors.

UN SDGs

Aligns with United Nations Sustainable Development Goals 12 and 13

Energy Consumption Reduction

Lowers electricity consumption by a minimum of 10%^†

Emissions Reduction

Reduces greenhouse gas emissions by up to 143 metric tons of CO₂e per well per year^†,‡

Multi-Industry Application

Benefits multiple industries, including geothermal energy production, where the pump's electricity consumption is considered a parasitic load

^†Performance improvement is based on a 4.61-in [117-mm], 322-hp motor configuration compared with previous-generation induction motor technology. Calculations are based on a run life of 365 days with 100% uptime and take into consideration efficiency losses of the power cable, variable frequency or variable speed ESP drive, and transformer.
^‡ The conversion from electricity to CO₂ is based on the IEA Emission Factors 2019 reference of 485.30 g of CO₂/kW.h.

Applications

PMMs for ESPs are used with Reda ESP pumps in multiple industries, including oil and gas, mining (for dewatering), and geothermal energy production.

An alternative technology in electrical downhole drives, PMMs are assembled and run in the same way as conventional ESP motors and are suited for most applications.

Tech Paper

Permanent Magnet Motors: The Future of ESP Applications?

A detailed study of the potential economic and environmental benefits.

Benefits

Reduced energy consumption and emissions

Assessing the power efficiency of ESPs is a practical first step to reducing energy consumption and the resulting emissions during operation. Pumps and motors are the components with the largest impact on energy consumed.

Streamlined installation and real-time monitoring

Our PMMs are filled in a controlled environment with high-temperature synthetic oil to provide dielectric strength, bearing lubrication, and thermal conductivity. The ESP flange connection facilitates reliable motor and protector connections while ensuring a leak-tight seal. MaxLok™ ESP quick-plug motor lead extension (MLE) simplifies making up the pothead to the motor with a plug-in connection that eliminates taping of pothead terminals at the wellsite.

The gauge-ready base is compatible with any Phoenix artificial lift downhole monitoring system sensor for real-time monitoring of ESP and reservoir properties. A temperature sensor connected directly to the motor winding enables monitoring motor-winding temperature in real time through all stages of operation.

PMM safety

SLB has implemented operational standard work instructions globally to enhance the safety of everyone involved in installing, operating, and removing PMMs. Training for your personnel is available on request at our assembly, repair, and test (ART) centers.

World map showing Schlumberger artificial lift surveillance, manufacturing, and ESP repair and test centers

Features

Greater operational flexibility due to motor size and power

Our energy-efficient yet powerful PMMs are reliable, robust, and available in a wide range of sizes and horsepower options. Higher power per unit of length—power density—results in a motor that's shorter and lighter than legacy induction electric submersible pump (ESP) motors without reducing the rating. It also enables a single-motor configuration in place of long tandem motor arrangements, which reduces risks associated with ESP installation in deviated wells, especially wells with high dogleg severity (DLS).

In rapidly changing environments, the PMM's higher torque capabilities enable stable ESP operation during increased solids production or water cut. Stable torque across various load conditions is the key differentiator, enabling a wider application envelope and improving reliability.

PMMs deliver higher efficiency, power factor, and power density as well as a wider range of operating speeds compared with conventional induction motors. Reda ESP™ pump PMM technology lowers electricity consumption by a minimum of 10% because of its greater efficiency, saving energy and reducing Scope 1 or Scope 2 emissions (depending on the electricity source).

Efficiency: Up to 93% at 100% load

Motor ODs, in [mm]: 3.19 [81], 4.06 [103], 4.61 [117], and 5.62 [143]

High reliability: Extended run life due to cooler motor running temperatures

FAQs

Why are PMMs more efficient than induction motors?

PMMs are synchronous electric machines—the rotor rotates at the same speed as the magnetic field in the stator. This synchronous operation reduces losses in the core, resulting in less heating and an expanded operating envelope for the ESP.

For optimal operation, PMMs require a variable speed drive (VSD) with special control algorithms to time the switching of the output transistors and control the current in the motor windings. The incremental cost of upgrading to a VSD is quickly recovered.

The content of this publication has not been approved by the United Nations and does not reflect the views of the United Nations or its officials or Member States.