Permanent Magnet Motor as Magnetic Coupling
As proven in many different applications, permanent magnet (PM) motors have advantages over other motors with regards to power density, efficiency and unity power factor. Furthermore, the large operating gaps between the rotor and stator enable the rotor and the stator to be canned separately, which is widely done for top side applications. This unique capability is even further exploited and leveraged at Upwing through the patented Magnetic Drive System™ (MDS) concept, which utilizes the PM motor as a magnetic coupling.
In the MDS, the stator is canned and positioned as a part of the permanent completion, thereby allowing the rotor and all other rotating components of the pump to be retrieved independently from the stator. This utilization of the PM motor as a magnetic coupling that can be separated/retrieved via a slick line without any connections between the rotating and stationary components offers a protector-less motor/coupling that increases the reliability and retrievability of the system.
Removing the protector section of a conventional electric submersible pump (ESP) system has been a top desire of the artificial lift industry. Upwing Energy is able to not only remove the most unreliable component of an ESP system, the “protector,” but also has introduced an integrated PM motor and magnetic coupling that can be retrieved via slick line, increasing reliability while decreasing part count and costs of all rotating downhole artificial lift equipment.