Upper Zone ESP / Lower Zone Natural Flow (Seal Bore Packer Or Tubing Retrievable Packer)
System 21: Dual Zone - Single ESP -Concentric Tubing Strings
Multiple reservoirs can be produced independently in the same well bore.
In cases where the upper zone requires an ESP and the lower zone flows naturally, a dual zone completion can be used with two concentric production tubing strings.
A flow crossover with high strength bypass tubing is used with a pump support. Zone isolation is either with a seal bore packer or a retrievable tubing packer.
The seal bore packer allows zonal isolation during workover, where the tubing retrievable packer does not.
Advantages
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