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→Alternate completions
===Alternate completions===
===Alternate completions===
[[file:well-completions_fig6.png|thumb|300px|{{figure number|6}}Wellbore diagram of a single completion with an alternative zone.]]
Alternate completions are used to allow inexpensive recompletions. Normally, a single interval is completed and produced to abandonment and then, using wireline tools, the lower interval is isolated and the upper interval opened to production ([[:file:well-completions_fig6.png|Figure 6]]). Alternate completions eliminate the need for costly [[workovers]] using rigs. It is possible to have a dual well with two alternate completions; however, as the completion gets more complex, more problems will occur. Alternate completions are used in areas where workover costs by conventional methods can be quite high. The most common use of alternate completions is offshore.
Alternate completions are used to allow inexpensive recompletions. Normally, a single interval is completed and produced to abandonment and then, using wireline tools, the lower interval is isolated and the upper interval opened to production ([[:file:well-completions_fig6.png|Figure 6]]). Alternate completions eliminate the need for costly [[workovers]] using rigs. It is possible to have a dual well with two alternate completions; however, as the completion gets more complex, more problems will occur. Alternate completions are used in areas where workover costs by conventional methods can be quite high. The most common use of alternate completions is offshore.