In high production wells, centrilift ESP equipment is the preferred artificial lift method. However, completions with smaller 5.5 inch casing or liner diameters create limitations to the benefits in ESP can deliver. For example, if an ESP is set above the perfos in a gas well, the potential for S entering the pump is greatly increased and drawdown becomes severely limited. If any ESP is set below the perfos, a shroud must be employed to direct fluid flow pass the motor to ensure adequate motor cooling. A shrouded ESP prequires for more expensive slimline equipment and may create a scaling problem in the shroud. This centrilift solution for this type of well is the patented recirculation unit, a larger diameter ESP that cools the motor without a shroud.
The recirculation unit is installed just below the production pump. It siphons off some of the productions fluid and diverts it through bypassed tubes to a point below the motor. The fluid in recirculates passes the motor to cool it. This advanced ESP design solutions allows the ESP to be set below the perfos to take advantage of the natural gas separation which occurs in a casing. Since no shroud is required, more economical larger diameter and higher horse power equipment can be installed.
The recirculation unit is installed just below the production pump. It siphons off some of the productions fluid and diverts it through bypassed tubes to a point below the motor. The fluid in recirculates passes the motor to cool it. This advanced ESP design solutions allows the ESP to be set below the perfos to take advantage of the natural gas separation which occurs in a casing. Since no shroud is required, more economical larger diameter and higher horse power equipment can be installed.
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