The expandable openhole liner system is used as solution for operational challenges associated with borehole instabilities, pore pressure/fracture gradient issues and the effect of salt or subsalt formation. All these operational challenges produce pre- mature downsizing of well's tubular.

While drilling in the Kupal oilfield located in south west of Ahwaz, Iran, an isolated extreme thief zone was penetrated resulting in a possible unplanned conventional liner was run, decreasing further deeper hole sizes. The smaller size of liner would have cause problems such as lower reservoir production rate and putting limitations on running measurement tools to evaluate the reservoir. Because of these aforementioned negative effects of running a conventional liner it was instead desided to run an expandable openhole liner.

This paper discusses challenges and solutions for running the first expandable openhole liner in Iran to reach a proposed target with the planned hole sizes as well as a cost evaluation and comparison of two wells, one using expandable open hole liner and one using conventional liner.

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