دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: drilling in which the size of the hole is smaller than the conventional hole diameter for a given depth. This decrease in hole size enables the operator to run smaller casing, thereby lessening the cost of completion. See miniaturized completion.

n: by current industry definition, is one where the well is TDd in 4 1/2 or smaller hole size. Slim hole drilling brings significant cost and enviromental benefits but makes well control more diffcult due to the high ECDs and small annular capacities.