In high-temperature gassy environments common to thermal-recovery heavy applications like steam-assisted gravity drainage (SAGD) or steamflooding, rugged electric submersible pump (ESP) systems are conventionally unreliable. Such systems are delicate and cannot handle high bottomhole temperatures, decreasing the chances of early production and increasing the chances of downtime and intervention costs. Components of the ESP subject to mechanical stress, such as shafts, flanges, bolts, and bearings, can ultimately reduce run life if impaired. To increase the changes of reliability and reduce downtime and intervention costs, Schlumberger developed the REDA HotlineSA3 high-temperature ESP system, which can operate reliably in wells with bottomhole temperatures of up to 250 degC (482 degF). The system incorporates an integrated design that extends system run life and the ESP operating envelope. The design is specifically for high-temperature gassy environments; for corrosive, abrasive environments; and for wells with poor cooling characteristics.