Electric Submersible Pumps

Electrical submersible pump is an efficient and reliable artificial-lift method for lifting moderate to high volumes of fluids from wellbores. These volumes range from as low of 150 B/D to as much as 150,000 B/D (24 to 24,600 m3/d). Variable-speed controllers can extend this range significantly, both on the high and low side. The ESP’s main components include:

• Multistaged centrifugal pump
• Three-phase induction motor
• Seal-chamber section
• Power cable
• Surface controls

The components are normally tubing hung from the wellhead with the pump on top and the motor attached below. There are special applications in which this configuration is inverted.