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REDA Hotline High-Temperature ESP System
Benefits
- Extended ESP run life
- Expanded ESP operating range
- Increased production in thermal recovery applications
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The REDA Hotline high-temperature ESP system is setting a new standard in performance in extreme-temperature ESP applications. With over 450 installations and a record run life of more than 4.5 years and running, the REDA Hotline ESP system is the method of choice for steamflood and steam-assisted gravity drainage (SAGD) applications and for high-temperature, highly abrasive, and corrosive environments common to thermal recovery heavy oil applications.
The REDA Hotline550 high-temperature ESP system consists of ESP downhole equipment, pump, motor protector, and power cables and has a maximum bottomhole temperature rating of 218 degC [425 degF]. It accommodates material expansion and contraction and thermal fatigue resulting from temperature cycles and extremes.
Equipment design
Each component has been designed to extend system run life in high-temperature applications:
- Pump—tolerates abrasive fluids at high temperatures by using compression construction combined with abrasion-resistant materials and bearing systems.
- Motor—uses special high-temperature materials rated to 288 degC [550 degF]; the motor pothead has nonelastomeric, metal-to-metal seals that act as barrier to prevent fluids from entering the motor.
- Protector—can use metal bellows expansion chamber that eliminates risks encountered with elastomers operating in high temperatures; has dual bearing system, dual elevated shaft seals, and special sand diverter system to improve performance in abrasive applications.
- Power cable—helps ensure electrical system reliability from power supply to motor.
Gas handling and steam breakthrough
Schlumberger has extensive experience in equipment selection and pump sizing for steamflood applications. Numerous gas separators and gas handlers are available for maximizing well drawdown. When a gas separator and a gas handler are used together, the ESP system can produce a gas volume fraction of up to 95%.
Distributed temperature measurements
The Hotline550 system can use the Sensa fiber-optic distributed temperature sensing (DTS) system to monitor temperature profiles along the wellbore. Monitoring the temperature across a horizontal section helps improve steamflooding efficiency and identify steam breakthrough. Monitoring the temperature across the ESP string helps identify pump performance degradation and gas locking and provides key information for optimizing well production.
SpeedStar variable speed drive (VSD)
A VSD provides the optimal operation for varying flow conditions. The SpeedStar VSD features an integral sine wave output filter that reduces the harmonic heating of the electrical components downstream and the voltage stress due to overshoots. In the current/pressure mode, a VSD tracks preset operating positions to maintain production through changing conditions.
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Request more information about REDA Hotline High-Temperature ESP System and other Schlumberger innovations.
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