Upper Zone Natural Flow / Lower Zone ESP (Seal Bore Packer)
System 17: Dual Zone - Single ESP -Concentric Tubing Strings
Multiple reservoirs can be produced independently in the same well bore. In cases where the upper zone can flow naturally and the lower zone requires an ESP, a dual zone completion can be used with two concentric production tubing strings.
When the distance between zones is restricted, a pod system with seal bore packer can be used.
This also allows zones to be isolated with an isolation valve to prevent communication between zones during a workover.
Advantages
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