Technical Paper: The Quest to Understand ESP Performance and Reliability at 220°C Ambient and Beyond

Society: SPE
Paper Number: 123735
Presentation Date: 2009
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ConocoPhillips has been on a quest for a high-volume artificial lift system that will operate reliably in a 250-degC (482-degF) downhole environment. This paper will describe the testing and results of a high-temperature electric submersible pump (ESP) system in a flow loop built to validate downhole equipment for thermal applications, primarily for steam-assisted gravity drainage (SAGD) developments. What makes this test program unique from previous tests is the longer duration (4+ weeks), the range of fluid temperatures (90 degC to 245 degC [194 degF to 473 degF]), and the type and volume of data collected. One of the key parameters monitored and documented was the internal motor winding temperature, which has been used to validate and calibrate a simulator for predicting motor performance in thermal environments.

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