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<sup>a</sup><sub>Symbols: √ = good conditions, × = unsuitable conditions, - = marginally acceptable conditions, NR = not recommended, NA = not applicable, M = with special modifications.</sub><br>
<sup>a</sup><sub>Symbols: √ = good conditions, × = unsuitable conditions, - = marginally acceptable conditions, NR = not recommended, NA = not applicable, M = with special modifications.</sub><br>
<sup>b</sup><sub>Mud types: F = freshwater (low salt), S = high salt, B = barite, K = high potassium salt, O = oil-based.</sub>
<sup>b</sup><sub>Mud types: F = freshwater (low salt), S = high salt, B = barite, K = high potassium salt, O = oil-based.</sub><br>
<sup>* Mark of Schlumberger</sup><br>
<sup>* Mark of Schlumberger</sup><br>