Overview  •  Well  •  Motor  •  Downhole sensor  •  Seal section  •  Pump 
Intake/Gas Separator  •  Tubing  •  Wellhead  •  Cable  •    J-box  •  Switchboard  •  Transformer  •   Conclusion

The electric motor provides the torque to drive the pump. The motor is submerged (along with the rest of the pump assembly) at a pre-calculated depth in the well. ESP motors differ from conventional electric motors in the fact that the internal airspace is filled with a high dielectric strength mineral oil. The mineral oil provides a non-compressible medium inside the motor to prevent the structure from imploding under the intense bore pressures. ESP motors have a high length-to-diameter ratio and can range from 6 ft to 33 ft long and 3 ¾" to 9 ½" in outside diameter. They can also be coupled together to build horsepower. Motor nameplate voltages range from 480 volts to 2000 volts.