well-completions_fig4.png|{{figure number|4}}Wellbore diagram of (a) a casing-tubing dual completion and (b) a completion with dual packers and dual tubing strings. | well-completions_fig4.png|{{figure number|4}}Wellbore diagram of (a) a casing-tubing dual completion and (b) a completion with dual packers and dual tubing strings. |