Abstract Step change in drilling effiency to enhance drilling performance in our field. Our casing design in our field heavy casing design as drill 22″ hole and set 18.5/8″ casing at +/- 2000 ft and drill this phase with RSS to control the verticalitly in the hole as our wells drilled in cluster location the separation between each wells is 10 M only so the verticalitly is very important to avoid anti collsions between the wellsso 1st phase the quality to drill the hole and run casing is very important than make perfroamnce. Second phace in our casing design is 16″ phase which will drill it deviated section up to +/- 9000 ftand will discuss it in detail after complete discsions the remain phases in our casing design.