Steam-assisted gravity drainage (SAGD) is a proven technique for producing heavy oil. Schlumberger Artificial Lift worked to extend the temperature range of the REDA Hotline ESP. In 2009, a new extended-temperature range Hotline ESP system was developed and tested for operation at 482 degF (250 degC). The REDA HotlineSA3 system has since passed extensive testing while running at maximum rated temperatures, including strict third-party qualification requirements at C-FER Technology Laboratories in Canada, with collaboration and sponsorship by major heavy oil operator ConocoPhillips. Finite Element Analyses allowed for the development and qualification of an ESP that operates in extreme and high temperature environments.