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...ty and expense involved with a [[Types_of_completions#Multiple_completions|dual or triple completion]] in reservoirs deeper than [[depth::10000 ft]]. ...a casing-tubing dual completion and (b) a completion with dual packers and dual tubing strings.

...etions are preferred because of the complexity and expense involved with a dual or triple completion in reservoirs deeper than [[depth::10,000 ft]]. ...a casing-tubing dual completion and (b) a completion with dual packers and dual tubing strings.

...tion.jpg|thumb|300px|Wellhead in Northeastern BC, Canada The wellhead is a dual completion. Two different zones have been completed however production from